1 Star 0 Fork 577

Lifetruth/MiniExcel

forked from dotNET China/MiniExcel 
加入 Gitee
与超过 1200万 开发者一起发现、参与优秀开源项目,私有仓库也完全免费 :)
免费加入
克隆/下载
贡献代码
同步代码
取消
提示: 由于 Git 不支持空文件夾,创建文件夹后会生成空的 .keep 文件
Loading...
README
Apache-2.0

NuGet Build status star GitHub stars version



您的 Star赞助购买视频 能帮助 MiniExcel 成长


🎥视频教学


QQ群(1群) : 813100564 / QQ群(2群) : 579033769

淘宝接案店铺 : 链接


简介

MiniExcel简单、高效避免OOM的.NET处理Excel查、写、填充数据工具。

目前主流框架大多需要将数据全载入到内存方便操作,但这会导致内存消耗问题,MiniExcel 尝试以 Stream 角度写底层算法逻辑,能让原本1000多MB占用降低到几MB,避免内存不够情况。

image

特点

  • 低内存耗用,避免OOM、频繁 Full GC 情况
  • 支持即时操作每行数据
  • 兼具搭配 LINQ 延迟查询特性,能办到低消耗、快速分页等复杂查询
  • 轻量,不需要安装 Microsoft Office、COM+,DLL小于150KB
  • 简便操作的 API 风格

快速开始

安装

请查看 NuGet

更新日志

请查看 Release Notes

TODO

请查看 TODO

性能比较、测试

Benchmarks 逻辑可以在 MiniExcel.Benchmarks 查看或是提交 PR,运行指令

dotnet run -p .\benchmarks\MiniExcel.Benchmarks\ -c Release -f netcoreapp3.1 -- -f * --join

最后一次运行规格、结果 :

BenchmarkDotNet=v0.12.1, OS=Windows 10.0.19042
Intel Core i7-7700 CPU 3.60GHz (Kaby Lake), 1 CPU, 8 logical and 4 physical cores
  [Host]     : .NET Framework 4.8 (4.8.4341.0), X64 RyuJIT
  Job-ZYYABG : .NET Framework 4.8 (4.8.4341.0), X64 RyuJIT
IterationCount=3  LaunchCount=3  WarmupCount=3  

Benchmark History : Link

导入、查询 Excel 比较

逻辑 : 以 Test1,000,000x10.xlsx 做基准与主流框架做性能测试,总共 1,000,000 行 * 10 列笔 "HelloWorld",文件大小 23 MB

Library Method 最大内存耗用 平均时间
MiniExcel 'MiniExcel QueryFirst' 0.109 MB 0.0007264 sec
ExcelDataReader 'ExcelDataReader QueryFirst' 15.24 MB 10.66421 sec
MiniExcel 'MiniExcel Query' 17.3 MB 14.17933 sec
ExcelDataReader 'ExcelDataReader Query' 17.3 MB 22.56508 sec
Epplus 'Epplus QueryFirst' 1,452 MB 18.19801 sec
Epplus 'Epplus Query' 1,451 MB 23.64747 sec
OpenXmlSDK 'OpenXmlSDK Query' 1,412 MB 52.00327 sec
OpenXmlSDK 'OpenXmlSDK QueryFirst' 1,413 MB 52.34865 sec
ClosedXml 'ClosedXml QueryFirst' 2,158 MB 66.18897 sec
ClosedXml 'ClosedXml Query' 2,184 MB 191.43412 sec

导出、创建 Excel 比较

逻辑 : 创建1千万笔 "HelloWorld"

Library Method 最大内存耗用 平均时间
MiniExcel 'MiniExcel Create Xlsx' 15 MB 11.53181 sec
Epplus 'Epplus Create Xlsx' 1,204 MB 22.50971 sec
OpenXmlSdk 'OpenXmlSdk Create Xlsx' 2,621 MB 42.47399 sec
ClosedXml 'ClosedXml Create Xlsx' 7,141 MB 140.93992 sec

读/导入 Excel

1. Query 查询 Excel 返回强型别 IEnumerable 数据 [Try it]

public class UserAccount
{
    public Guid ID { get; set; }
    public string Name { get; set; }
    public DateTime BoD { get; set; }
    public int Age { get; set; }
    public bool VIP { get; set; }
    public decimal Points { get; set; }
}

var rows = MiniExcel.Query<UserAccount>(path);

// or

using (var stream = File.OpenRead(path))
    var rows = stream.Query<UserAccount>();

image

2. Query 查询 Excel 返回Dynamic IEnumerable 数据 [Try it]

  • Key 系统预设为 A,B,C,D...Z
MiniExcel 1
Github 2

var rows = MiniExcel.Query(path).ToList();

// or 
using (var stream = File.OpenRead(path))
{
    var rows = stream.Query().ToList();
                
    Assert.Equal("MiniExcel", rows[0].A);
    Assert.Equal(1, rows[0].B);
    Assert.Equal("Github", rows[1].A);
    Assert.Equal(2, rows[1].B);
}

3. 查询数据以第一行数据当Key [Try it]

注意 : 同名以右边数据为准

Input Excel :

Column1 Column2
MiniExcel 1
Github 2

var rows = MiniExcel.Query(useHeaderRow:true).ToList();

// or

using (var stream = File.OpenRead(path))
{
    var rows = stream.Query(useHeaderRow:true).ToList();

    Assert.Equal("MiniExcel", rows[0].Column1);
    Assert.Equal(1, rows[0].Column2);
    Assert.Equal("Github", rows[1].Column1);
    Assert.Equal(2, rows[1].Column2);
}

4. Query 查询支援延迟加载(Deferred Execution),能配合LINQ First/Take/Skip办到低消耗、高效率复杂查询

举例 : 查询第一笔数据

var row = MiniExcel.Query(path).First();
Assert.Equal("HelloWorld", row.A);

// or

using (var stream = File.OpenRead(path))
{
    var row = stream.Query().First();
    Assert.Equal("HelloWorld", row.A);
}

与其他框架效率比较 :

queryfirst

5. 查询指定 Sheet 名称

MiniExcel.Query(path, sheetName: "SheetName");
//or
stream.Query(sheetName: "SheetName");

6. 查询所有 Sheet 名称跟数据

var sheetNames = MiniExcel.GetSheetNames(path);
foreach (var sheetName in sheetNames)
{
    var rows = MiniExcel.Query(path, sheetName: sheetName);
}

7. 查询所有栏(列)

var columns = MiniExcel.GetColumns(path); // e.g result : ["A","B"...]

or

var columns = MiniExcel.GetColumns(path, useHeaderRow: true); 
// e.g result : ["excel表实际的列名称","excel表实际的列名称"...]

var cnt = columns.Count;  // get column count

8. Dynamic Query 转成 IDictionary<string,object> 数据

foreach(IDictionary<string,object> row in MiniExcel.Query(path))
{
    //..
}

// or 
var rows = MiniExcel.Query(path).Cast<IDictionary<string,object>>(); 

9. Query 读 Excel 返回 DataTable

提醒 : 不建议使用,因为DataTable会将数据全载入内存,失去MiniExcel低内存消耗功能。

var table = MiniExcel.QueryAsDataTable(path, useHeaderRow: true);

image

10. 指定单元格开始读取数据

MiniExcel.Query(path,useHeaderRow:true,startCell:"B3")

image

11. 合并的单元格填充

注意 : 效率相对于没有使用合并填充来说差
底层原因 : OpenXml 标准将 mergeCells 放在文件最下方,导致需要遍历两次 sheetxml

	var config = new OpenXmlConfiguration()
	{
		FillMergedCells = true
	};
	var rows = MiniExcel.Query(path, configuration: config);

image

支持不固定长宽多行列填充

image

12. 读取大文件硬盘缓存 (Disk-Base Cache - SharedString)

概念 : MiniExcel 当判断文件 SharedString 大小超过 5MB,预设会使用本地缓存,如 10x100000.xlsx(一百万笔数据),读取不开启本地缓存需要最高内存使用约195MB,开启后降为65MB。但要特别注意,此优化是以时间换取内存减少,所以读取效率会变慢,此例子读取时间从 7.4 秒提高到 27.2 秒,假如不需要能用以下代码关闭硬盘缓存

var config = new OpenXmlConfiguration { EnableSharedStringCache = false };
MiniExcel.Query(path,configuration: config)

也能使用 SharedStringCacheSize 调整 sharedString 文件大小超过指定大小才做硬盘缓存

var config = new OpenXmlConfiguration { SharedStringCacheSize=500*1024*1024 };
MiniExcel.Query(path, configuration: config);

image

image

写/导出 Excel

  1. 必须是非abstract 类别有公开无参数构造函数
  2. MiniExcel SaveAs 支援 IEnumerable参数延迟查询,除非必要请不要使用 ToList 等方法读取全部数据到内存

图片 : 是否呼叫 ToList 的内存差别

image1. 支持集合<匿名类别>或是<强型别> [Try it]

var path = Path.Combine(Path.GetTempPath(), $"{Guid.NewGuid()}.xlsx");
MiniExcel.SaveAs(path, new[] {
    new { Column1 = "MiniExcel", Column2 = 1 },
    new { Column1 = "Github", Column2 = 2}
});

2. IEnumerable<IDictionary<string, object>>

var values = new List<Dictionary<string, object>>()
{
    new Dictionary<string,object>{{ "Column1", "MiniExcel" }, { "Column2", 1 } },
    new Dictionary<string,object>{{ "Column1", "Github" }, { "Column2", 2 } }
};
MiniExcel.SaveAs(path, values);

output :

Column1 Column2
MiniExcel 1
Github 2

3. IDataReader

  • 推荐使用,可以避免载入全部数据到内存
MiniExcel.SaveAs(path, reader);

image

推荐 DataReader 多表格导出方式(建议使用 Dapper ExecuteReader )

using (var cnn = Connection)
{
    cnn.Open();
    var sheets = new Dictionary<string,object>();
    sheets.Add("sheet1", cnn.ExecuteReader("select 1 id"));
    sheets.Add("sheet2", cnn.ExecuteReader("select 2 id"));
    MiniExcel.SaveAs("Demo.xlsx", sheets);
}

4. Datatable

  • 不推荐使用,会将数据全载入内存
  • 优先使用 Caption 当栏位名称
var path = Path.Combine(Path.GetTempPath(), $"{Guid.NewGuid()}.xlsx");
var table = new DataTable();
{
    table.Columns.Add("Column1", typeof(string));
    table.Columns.Add("Column2", typeof(decimal));
    table.Rows.Add("MiniExcel", 1);
    table.Rows.Add("Github", 2);
}

MiniExcel.SaveAs(path, table);

5. Dapper Query

  • 不推荐使用,会将数据全载入内存,建议使用ExecuteReader
using (var connection = GetConnection(connectionString))
{
    var rows = connection.Query(@"select 'MiniExcel' as Column1,1 as Column2 union all select 'Github',2");
    MiniExcel.SaveAs(path, rows);
}

6. SaveAs 支持 Stream,生成文件不落地 [Try it]

using (var stream = new MemoryStream()) //支持 FileStream,MemoryStream..等
{
    stream.SaveAs(values);
}

像是 API 导出 Excel

public IActionResult DownloadExcel()
{
    var values = new[] {
        new { Column1 = "MiniExcel", Column2 = 1 },
        new { Column1 = "Github", Column2 = 2}
    };

    var memoryStream = new MemoryStream();
    memoryStream.SaveAs(values);
    memoryStream.Seek(0, SeekOrigin.Begin);
    return new FileStreamResult(memoryStream, "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet")
    {
        FileDownloadName = "demo.xlsx"
    };
}

7. 创建多个工作表(Sheet)

// 1. Dictionary<string,object>
var users = new[] { new { Name = "Jack", Age = 25 }, new { Name = "Mike", Age = 44 } };
var department = new[] { new { ID = "01", Name = "HR" }, new { ID = "02", Name = "IT" } };
var sheets = new Dictionary<string, object>
{
    ["users"] = users,
    ["department"] = department
};
MiniExcel.SaveAs(path, sheets);

// 2. DataSet
var sheets = new DataSet();
sheets.Add(UsersDataTable);
sheets.Add(DepartmentDataTable);
//..
MiniExcel.SaveAs(path, sheets);

image

8. 表格样式选择

预设样式为

image

不需要样式

var config = new OpenXmlConfiguration()
{
    TableStyles = TableStyles.None
};
MiniExcel.SaveAs(path, value,configuration:config);

image

9. AutoFilter 筛选

从 0.19.0 支持,可藉由 OpenXmlConfiguration.AutoFilter 设定,预设为True。关闭 AutoFilter 方式 :

MiniExcel.SaveAs(path, value, configuration: new OpenXmlConfiguration() { AutoFilter = false });

10. 图片生成

注意 : 目前此功能不支持避免OOM

var value = new[] {
    new { Name="github",Image=File.ReadAllBytes(PathHelper.GetFile("images/github_logo.png"))},
    new { Name="google",Image=File.ReadAllBytes(PathHelper.GetFile("images/google_logo.png"))},
    new { Name="microsoft",Image=File.ReadAllBytes(PathHelper.GetFile("images/microsoft_logo.png"))},
    new { Name="reddit",Image=File.ReadAllBytes(PathHelper.GetFile("images/reddit_logo.png"))},
    new { Name="statck_overflow",Image=File.ReadAllBytes(PathHelper.GetFile("images/statck_overflow_logo.png"))},
};
MiniExcel.SaveAs(path, value);

image

11. Byte Array 文件导出

从 1.22.0 开始,当值类型为 byte[] 系统预设会转成保存文件路径以便导入时转回 byte[],如不想转换可以将 OpenXmlConfiguration.EnableConvertByteArray 改为 false,能提升系统效率。

image

12. 垂直合并相同的单元格

只支持 xlsx 格式合并单元格

var mergedFilePath = Path.Combine(Path.GetTempPath(), $"{Guid.NewGuid().ToString()}.xlsx");
            
var path = @"../../../../../samples/xlsx/TestMergeSameCells.xlsx";

MiniExcel.MergeSameCells(mergedFilePath, path);
var memoryStream = new MemoryStream();
            
var path = @"../../../../../samples/xlsx/TestMergeSameCells.xlsx";

memoryStream.MergeSameCells(path);

合并前后对比

before_merge_cells after_merge_cells

模板填充 Excel

  • 宣告方式类似 Vue 模板 {{变量名称}}, 或是集合渲染 {{集合名称.栏位名称}}
  • 集合渲染支持 IEnumerable/DataTable/DapperRow

1. 基本填充

模板:
image

最终效果:
image

代码:

// 1. By POCO
var value = new
{
    Name = "Jack",
    CreateDate = new DateTime(2021, 01, 01),
    VIP = true,
    Points = 123
};
MiniExcel.SaveAsByTemplate(path, templatePath, value);


// 2. By Dictionary
var value = new Dictionary<string, object>()
{
    ["Name"] = "Jack",
    ["CreateDate"] = new DateTime(2021, 01, 01),
    ["VIP"] = true,
    ["Points"] = 123
};
MiniExcel.SaveAsByTemplate(path, templatePath, value);

2. IEnumerable 数据填充

Note1: 同行从左往右以第一个 IEnumerableUse 当列表来源 (不支持同列多集合)

模板:
image

最终效果:
image

代码:

//1. By POCO
var value = new
{
    employees = new[] {
        new {name="Jack",department="HR"},
        new {name="Lisa",department="HR"},
        new {name="John",department="HR"},
        new {name="Mike",department="IT"},
        new {name="Neo",department="IT"},
        new {name="Loan",department="IT"}
    }
};
MiniExcel.SaveAsByTemplate(path, templatePath, value);

//2. By Dictionary
var value = new Dictionary<string, object>()
{
    ["employees"] = new[] {
        new {name="Jack",department="HR"},
        new {name="Lisa",department="HR"},
        new {name="John",department="HR"},
        new {name="Mike",department="IT"},
        new {name="Neo",department="IT"},
        new {name="Loan",department="IT"}
    }
};
MiniExcel.SaveAsByTemplate(path, templatePath, value);

3. 复杂数据填充

Note: 支持多 sheet 填充,并共用同一组参数

模板:

image

最终效果:

image

代码:

// 1. By POCO
var value = new
{
    title = "FooCompany",
    managers = new[] {
        new {name="Jack",department="HR"},
        new {name="Loan",department="IT"}
    },
    employees = new[] {
        new {name="Wade",department="HR"},
        new {name="Felix",department="HR"},
        new {name="Eric",department="IT"},
        new {name="Keaton",department="IT"}
    }
};
MiniExcel.SaveAsByTemplate(path, templatePath, value);

// 2. By Dictionary
var value = new Dictionary<string, object>()
{
    ["title"] = "FooCompany",
    ["managers"] = new[] {
        new {name="Jack",department="HR"},
        new {name="Loan",department="IT"}
    },
    ["employees"] = new[] {
        new {name="Wade",department="HR"},
        new {name="Felix",department="HR"},
        new {name="Eric",department="IT"},
        new {name="Keaton",department="IT"}
    }
};
MiniExcel.SaveAsByTemplate(path, templatePath, value);

4. 大数据填充效率比较

NOTE: 在 MiniExcel 使用 IEnumerable 延迟 ( 不ToList ) 可以节省内存使用

image

5. Cell 值自动类别对应

模板

image

最终效果

image

类别

public class Poco
{
    public string @string { get; set; }
    public int? @int { get; set; }
    public decimal? @decimal { get; set; }
    public double? @double { get; set; }
    public DateTime? datetime { get; set; }
    public bool? @bool { get; set; }
    public Guid? Guid { get; set; }
}

代码

var poco = new TestIEnumerableTypePoco { @string = "string", @int = 123, @decimal = decimal.Parse("123.45"), @double = (double)123.33, @datetime = new DateTime(2021, 4, 1), @bool = true, @Guid = Guid.NewGuid() };
var value = new
{
    Ts = new[] {
        poco,
        new TestIEnumerableTypePoco{},
        null,
        poco
    }
};
MiniExcel.SaveAsByTemplate(path, templatePath, value);

6. Example : 列出 Github 专案

模板

image

最终效果

image

代码

var projects = new[]
{
    new {Name = "MiniExcel",Link="https://github.com/shps951023/MiniExcel",Star=146, CreateTime=new DateTime(2021,03,01)},
    new {Name = "HtmlTableHelper",Link="https://github.com/shps951023/HtmlTableHelper",Star=16, CreateTime=new DateTime(2020,02,01)},
    new {Name = "PocoClassGenerator",Link="https://github.com/shps951023/PocoClassGenerator",Star=16, CreateTime=new DateTime(2019,03,17)}
};
var value = new
{
    User = "ITWeiHan",
    Projects = projects,
    TotalStar = projects.Sum(s => s.Star)
};
MiniExcel.SaveAsByTemplate(path, templatePath, value);

7. 分组数据填充

var value = new Dictionary<string, object>()
{
    ["employees"] = new[] {
        new {name="Jack",department="HR"},
        new {name="Jack",department="HR"},
        new {name="John",department="HR"},
        new {name="John",department="IT"},
        new {name="Neo",department="IT"},
        new {name="Loan",department="IT"}
    }
};
MiniExcel.SaveAsByTemplate(path, templatePath, value);
1. 使用@group tag 和 @header` tag

Before

before_with_header

After

after_with_header

2. 使用 @group tag 没有 @header tag

Before

before_without_header

After

after_without_header

3. 没有 @group tag

Before

without_group

After

without_group_after

8. DataTable 当参数

var managers = new DataTable();
{
    managers.Columns.Add("name");
    managers.Columns.Add("department");
    managers.Rows.Add("Jack", "HR");
    managers.Rows.Add("Loan", "IT");
}
var value = new Dictionary<string, object>()
{
    ["title"] = "FooCompany",
    ["managers"] = managers,
};
MiniExcel.SaveAsByTemplate(path, templatePath, value);

9. 其他

1. 检查模版参数

从 V1.24.0 版本开始,预设忽略模版不存在的参数Key,IgnoreTemplateParameterMissing 可以决定是否抛出错误

var config = new OpenXmlConfiguration()
{
    IgnoreTemplateParameterMissing = false,
};
MiniExcel.SaveAsByTemplate(path, templatePath, value, config)

image

Excel 列属性 (Excel Column Attribute)

1. 指定列名称、指定第几列、是否忽略该列

Excel例子

image

代码

public class ExcelAttributeDemo
{
    [ExcelColumnName("Column1")]
    public string Test1 { get; set; }
    [ExcelColumnName("Column2")]
    public string Test2 { get; set; }
    [ExcelIgnore]
    public string Test3 { get; set; }
    [ExcelColumnIndex("I")] // 系统会自动转换"I"为第8列
    public string Test4 { get; set; } 
    public string Test5 { get; } //系统会忽略此列
    public string Test6 { get; private set; } //set非公开,系统会忽略
    [ExcelColumnIndex(3)] // 从0开始索引
    public string Test7 { get; set; }
}

var rows = MiniExcel.Query<ExcelAttributeDemo>(path).ToList();
Assert.Equal("Column1", rows[0].Test1);
Assert.Equal("Column2", rows[0].Test2);
Assert.Null(rows[0].Test3);
Assert.Equal("Test7", rows[0].Test4);
Assert.Null(rows[0].Test5);
Assert.Null(rows[0].Test6);
Assert.Equal("Test4", rows[0].Test7);

2. 自定义Format格式 (ExcelFormatAttribute)

從 V0.21.0 開始支持有 ToString(string content) 的類別 format

类别

public class Dto
{
    public string Name { get; set; }

    [ExcelFormat("MMMM dd, yyyy")]
    public DateTime InDate { get; set; }
}

代码

var value = new Dto[] {
    new Issue241Dto{ Name="Jack",InDate=new DateTime(2021,01,04)},
    new Issue241Dto{ Name="Henry",InDate=new DateTime(2020,04,05)},
};
MiniExcel.SaveAs(path, value);

效果

image

Query 支持自定义格式转换

image

3. 指定列宽(ExcelColumnWidthAttribute)

public class Dto
{
    [ExcelColumnWidth(20)]
    public int ID { get; set; }
    [ExcelColumnWidth(15.50)]
    public string Name { get; set; }
}

4. 多列名对应同一属性

public class Dto
{
    [ExcelColumnName(excelColumnName:"EmployeeNo",aliases:new[] { "EmpNo","No" })]
    public string Empno { get; set; }
    public string Name { get; set; }
}

5. System.ComponentModel.DisplayNameAttribute = ExcelColumnName.excelColumnNameAttribute

从 1.24.0 开始支持 System.ComponentModel.DisplayNameAttribute 等同于 ExcelColumnName.excelColumnNameAttribute 效果

public class TestIssueI4TXGTDto
{
    public int ID { get; set; }
    public string Name { get; set; }
    [DisplayName("Specification")]
    public string Spc { get; set; }
    [DisplayName("Unit Price")]
    public decimal Up { get; set; }
}

6. ExcelColumnAttribute

从 1.26.0 版本开始,可以简化多Attribute写法

        public class TestIssueI4ZYUUDto
        {
            [ExcelColumn(Name = "ID",Index =0)]
            public string MyProperty { get; set; }
            [ExcelColumn(Name = "CreateDate", Index = 1,Format ="yyyy-MM",Width =100)]
            public DateTime MyProperty2 { get; set; }
        }

7. DynamicColumnAttribute 动态设定 Column

从 1.26.0 版本开始,可以动态设定 Column 的属性

            var config = new OpenXmlConfiguration
            {
                DynamicColumns = new DynamicExcelColumn[] { 
                    new DynamicExcelColumn("id"){Ignore=true},
                    new DynamicExcelColumn("name"){Index=1,Width=10},
                    new DynamicExcelColumn("createdate"){Index=0,Format="yyyy-MM-dd",Width=15},
                    new DynamicExcelColumn("point"){Index=2,Name="Account Point"},
                }
            };
            var path = PathHelper.GetTempPath();
            var value = new[] { new { id = 1, name = "Jack", createdate = new DateTime(2022, 04, 12) ,point = 123.456} };
            MiniExcel.SaveAs(path, value, configuration: config);

image

新增、删除、修改

新增

v1.28.0 开始支持 CSV 插入新增,在最后一行新增N笔数据

// 原始数据
{
    var value = new[] {
          new { ID=1,Name ="Jack",InDate=new DateTime(2021,01,03)},
          new { ID=2,Name ="Henry",InDate=new DateTime(2020,05,03)},
    };
    MiniExcel.SaveAs(path, value);
}
// 最后一行新增一行数据
{ 
    var value = new { ID=3,Name = "Mike", InDate = new DateTime(2021, 04, 23) };
    MiniExcel.Insert(path, value);
}
// 最后一行新增N行数据
{
    var value = new[] {
          new { ID=4,Name ="Frank",InDate=new DateTime(2021,06,07)},
          new { ID=5,Name ="Gloria",InDate=new DateTime(2022,05,03)},
    };
    MiniExcel.Insert(path, value);
}

image

删除(未完成)

修改(未完成)

Excel 类别自动判断

  • MiniExcel 预设会根据文件扩展名判断是 xlsx 还是 csv,但会有失准时候,请自行指定。
  • Stream 类别无法判断来源于哪种 excel 请自行指定
stream.SaveAs(excelType:ExcelType.CSV);
//or
stream.SaveAs(excelType:ExcelType.XLSX);
//or
stream.Query(excelType:ExcelType.CSV);
//or
stream.Query(excelType:ExcelType.XLSX);

CSV

概念

  • 预设全以字串类型返回,预设不会转换为数字或者日期,除非有强型别定义泛型

自定分隔符

预设以 , 作为分隔符,自定义请修改 Seperator 属性

var config = new MiniExcelLibs.Csv.CsvConfiguration() 
{
    Seperator=';'
};
MiniExcel.SaveAs(path, values,configuration: config);

自定义换行符

预设以 \r\n 作为换行符,自定义请修改 NewLine 属性

var config = new MiniExcelLibs.Csv.CsvConfiguration() 
{
    NewLine='\n'
};
MiniExcel.SaveAs(path, values,configuration: config);

在 V1.30.1 版本开始支持动态更换换行符 (thanks @hyzx86)

var config = new CsvConfiguration()
{
    SplitFn = (row) => Regex.Split(row, $"[\t,](?=(?:[^\"]|\"[^\"]*\")*$)")
        .Select(s => Regex.Replace(s.Replace("\"\"", "\""), "^\"|\"$", "")).ToArray()
};
var rows = MiniExcel.Query(path, configuration: config).ToList();

自定义编码

  • 预设编码为「从Byte顺序标记检测编码」(detectEncodingFromByteOrderMarks: true)
  • 有自定义编码需求,请修改 StreamReaderFunc / StreamWriterFunc 属性
// Read
var config = new MiniExcelLibs.Csv.CsvConfiguration()
{
    StreamReaderFunc = (stream) => new StreamReader(stream,Encoding.GetEncoding("gb2312"))
};
var rows = MiniExcel.Query(path, true,excelType:ExcelType.CSV,configuration: config);

// Write
var config = new MiniExcelLibs.Csv.CsvConfiguration()
{
    StreamWriterFunc = (stream) => new StreamWriter(stream, Encoding.GetEncoding("gb2312"))
};
MiniExcel.SaveAs(path, value,excelType:ExcelType.CSV, configuration: config);

DataReader

1. GetReader

从 1.23.0 版本开始能获取 DataReader

    using (var reader = MiniExcel.GetReader(path,true))
    {
        while (reader.Read())
        {
            for (int i = 0; i < reader.FieldCount; i++)
            {
                var value = reader.GetValue(i);
            }
        }
    }

异步 Async

public static Task SaveAsAsync(string path, object value, bool printHeader = true, string sheetName = "Sheet1", ExcelType excelType = ExcelType.UNKNOWN, IConfiguration configuration = null)
public static Task SaveAsAsync(this Stream stream, object value, bool printHeader = true, string sheetName = "Sheet1", ExcelType excelType = ExcelType.XLSX, IConfiguration configuration = null)
public static Task<IEnumerable<dynamic>> QueryAsync(string path, bool useHeaderRow = false, string sheetName = null, ExcelType excelType = ExcelType.UNKNOWN, string startCell = "A1", IConfiguration configuration = null)
public static Task<IEnumerable<T>> QueryAsync<T>(this Stream stream, string sheetName = null, ExcelType excelType = ExcelType.UNKNOWN, string startCell = "A1", IConfiguration configuration = null) where T : class, new()    
public static Task<IEnumerable<T>> QueryAsync<T>(string path, string sheetName = null, ExcelType excelType = ExcelType.UNKNOWN, string startCell = "A1", IConfiguration configuration = null) where T : class, new() 
public static Task<IEnumerable<IDictionary<string, object>>> QueryAsync(this Stream stream, bool useHeaderRow = false, string sheetName = null, ExcelType excelType = ExcelType.UNKNOWN, string startCell = "A1", IConfiguration configuration = null)
public static Task SaveAsByTemplateAsync(this Stream stream, string templatePath, object value)
public static Task SaveAsByTemplateAsync(this Stream stream, byte[] templateBytes, object value)    
public static Task SaveAsByTemplateAsync(string path, string templatePath, object value)
public static Task SaveAsByTemplateAsync(string path, byte[] templateBytes, object value) 
public static Task<DataTable> QueryAsDataTableAsync(string path, bool useHeaderRow = true, string sheetName = null, ExcelType excelType = ExcelType.UNKNOWN, string startCell = "A1", IConfiguration configuration = null)
  • 从 v1.25.0 开始支持 cancellationToken

其他

1. 映射枚举(enum)

系统会自动映射(注意:大小写不敏感)

image

从V0.18.0版本开始支持Enum Description

public class Dto
{
    public string Name { get; set; }
    public Type UserType { get; set; }
}      

public enum Type
{
    [Description("General User")]
    V1,
    [Description("General Administrator")]
    V2,
    [Description("Super Administrator")]
    V3
}

image

从 1.30.0 版本开始支持由 Description 转回 Enum 功能,感谢 @KaneLeung

2. CSV 转 XLSX 或是 XLSX 转 CSV

MiniExcel.ConvertXlsxToCsv(xlsxPath, csvPath);
MiniExcel.ConvertXlsxToCsv(xlsxStream, csvStream);
MiniExcel.ConvertXlsxToCsv(csvPath, xlsxPath);
MiniExcel.ConvertXlsxToCsv(csvStream, xlsxStream);

3. 自定义 CultureInfo

从 1.22.0 版本开始,可以使用以下代码自定义文化信息,系统预设 CultureInfo.InvariantCulture

var config = new CsvConfiguration()
{
	Culture = new CultureInfo("fr-FR"),
};
MiniExcel.SaveAs(path, value, configuration: config);

//or
MiniExcel.Query(path, configuration: config);

4. 导出自定义 Buffer Size

    public abstract class Configuration : IConfiguration
    {
        public int BufferSize { get; set; } = 1024 * 512;
    }

5. FastMode

系统不会限制内存,达到更快的效率

var config = new OpenXmlConfiguration() { FastMode = true };
MiniExcel.SaveAs(path, reader,configuration:config);

例子

1. SQLite & Dapper 读取大数据新增到数据库

Note : 请不要呼叫 call ToList/ToArray 等方法,这会将所有数据读到内存内

using (var connection = new SQLiteConnection(connectionString))
{
    connection.Open();
    using (var transaction = connection.BeginTransaction())
    using (var stream = File.OpenRead(path))
    {
       var rows = stream.Query();
       foreach (var row in rows)
             connection.Execute("insert into T (A,B) values (@A,@B)", new { row.A, row.B }, transaction: transaction);
       transaction.Commit();
    }
}

效能: image

2. ASP.NET Core 3.1 下载/上传 Excel Xlsx API Demo Try it

public class ApiController : Controller
{
    public IActionResult Index()
    {
        return new ContentResult
        {
            ContentType = "text/html",
            StatusCode = (int)HttpStatusCode.OK,
            Content = @"<html><body>
<a href='api/DownloadExcel'>DownloadExcel</a><br>
<a href='api/DownloadExcelFromTemplatePath'>DownloadExcelFromTemplatePath</a><br>
<a href='api/DownloadExcelFromTemplateBytes'>DownloadExcelFromTemplateBytes</a><br>
<p>Upload Excel</p>
<form method='post' enctype='multipart/form-data' action='/api/uploadexcel'>
    <input type='file' name='excel'> <br>
    <input type='submit' >
</form>
</body></html>"
        };
    }

    public IActionResult DownloadExcel()
    {
        var values = new[] {
            new { Column1 = "MiniExcel", Column2 = 1 },
            new { Column1 = "Github", Column2 = 2}
        };
        var memoryStream = new MemoryStream();
        memoryStream.SaveAs(values);
        memoryStream.Seek(0, SeekOrigin.Begin);
        return new FileStreamResult(memoryStream, "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet")
        {
            FileDownloadName = "demo.xlsx"
        };
    }

    public IActionResult DownloadExcelFromTemplatePath()
    {
        string templatePath = "TestTemplateComplex.xlsx";

        Dictionary<string, object> value = new Dictionary<string, object>()
        {
            ["title"] = "FooCompany",
            ["managers"] = new[] {
                new {name="Jack",department="HR"},
                new {name="Loan",department="IT"}
            },
            ["employees"] = new[] {
                new {name="Wade",department="HR"},
                new {name="Felix",department="HR"},
                new {name="Eric",department="IT"},
                new {name="Keaton",department="IT"}
            }
        };

        MemoryStream memoryStream = new MemoryStream();
        memoryStream.SaveAsByTemplate(templatePath, value);
        memoryStream.Seek(0, SeekOrigin.Begin);
        return new FileStreamResult(memoryStream, "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet")
        {
            FileDownloadName = "demo.xlsx"
        };
    }

    private static Dictionary<string, Byte[]> TemplateBytesCache = new Dictionary<string, byte[]>();

    static ApiController()
    {
        string templatePath = "TestTemplateComplex.xlsx";
        byte[] bytes = System.IO.File.ReadAllBytes(templatePath);
        TemplateBytesCache.Add(templatePath, bytes);
    }

    public IActionResult DownloadExcelFromTemplateBytes()
    {
        byte[] bytes = TemplateBytesCache["TestTemplateComplex.xlsx"];

        Dictionary<string, object> value = new Dictionary<string, object>()
        {
            ["title"] = "FooCompany",
            ["managers"] = new[] {
                new {name="Jack",department="HR"},
                new {name="Loan",department="IT"}
            },
            ["employees"] = new[] {
                new {name="Wade",department="HR"},
                new {name="Felix",department="HR"},
                new {name="Eric",department="IT"},
                new {name="Keaton",department="IT"}
            }
        };

        MemoryStream memoryStream = new MemoryStream();
        memoryStream.SaveAsByTemplate(bytes, value);
        memoryStream.Seek(0, SeekOrigin.Begin);
        return new FileStreamResult(memoryStream, "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet")
        {
            FileDownloadName = "demo.xlsx"
        };
    }

    public IActionResult UploadExcel(IFormFile excel)
    {
        var stream = new MemoryStream();
        excel.CopyTo(stream);

        foreach (var item in stream.Query(true))
        {
            // do your logic etc.
        }

        return Ok("File uploaded successfully");
    }
}

3. 分页查询

void Main()
{
	var rows = MiniExcel.Query(path);
	
	Console.WriteLine("==== No.1 Page ====");
	Console.WriteLine(Page(rows,pageSize:3,page:1));
	Console.WriteLine("==== No.50 Page ====");
	Console.WriteLine(Page(rows,pageSize:3,page:50));
	Console.WriteLine("==== No.5000 Page ====");
	Console.WriteLine(Page(rows,pageSize:3,page:5000));
}

public static IEnumerable<T> Page<T>(IEnumerable<T> en, int pageSize, int page)
{
	return en.Skip(page * pageSize).Take(pageSize);
}

20210419

4. WebForm不落地导出Excel

var fileName = "Demo.xlsx";
var sheetName = "Sheet1";
HttpResponse response = HttpContext.Current.Response;
response.Clear();
response.ContentType = "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet";
response.AddHeader("Content-Disposition", $"attachment;filename=\"{fileName}\"");
var values = new[] {
    new { Column1 = "MiniExcel", Column2 = 1 },
    new { Column1 = "Github", Column2 = 2}
};
var memoryStream = new MemoryStream();
memoryStream.SaveAs(values, sheetName: sheetName);
memoryStream.Seek(0, SeekOrigin.Begin);
memoryStream.CopyTo(Response.OutputStream);
response.End();

5. 动态 i18n 多国语言跟权限管理

像例子一样,建立一个方法处理 i18n 跟权限管理,并搭配 yield return 返回 IEnumerable<Dictionary<string, object>>,即可达到动态、低内存处理效果

void Main()
{
	var value = new Order[] {
		new Order(){OrderNo = "SO01",CustomerID="C001",ProductID="P001",Qty=100,Amt=500},
		new Order(){OrderNo = "SO02",CustomerID="C002",ProductID="P002",Qty=300,Amt=400},
	};

	Console.WriteLine("en-Us and Sales role");
	{
		var path = Path.GetTempPath() + Guid.NewGuid() + ".xlsx";
		var lang = "en-US";
		var role = "Sales";
		MiniExcel.SaveAs(path, GetOrders(lang, role, value));
		MiniExcel.Query(path, true).Dump();
	}

	Console.WriteLine("zh-CN and PMC role");
	{
		var path = Path.GetTempPath() + Guid.NewGuid() + ".xlsx";
		var lang = "zh-CN";
		var role = "PMC";
		MiniExcel.SaveAs(path, GetOrders(lang, role, value));
		MiniExcel.Query(path, true).Dump();
	}
}

private IEnumerable<Dictionary<string, object>> GetOrders(string lang, string role, Order[] orders)
{
	foreach (var order in orders)
	{
		var newOrder = new Dictionary<string, object>();

		if (lang == "zh-CN")
		{
			newOrder.Add("客户编号", order.CustomerID);
			newOrder.Add("订单编号", order.OrderNo);
			newOrder.Add("产品编号", order.ProductID);
			newOrder.Add("数量", order.Qty);
			if (role == "Sales")
				newOrder.Add("价格", order.Amt);
			yield return newOrder;
		}
		else if (lang == "en-US")
		{
			newOrder.Add("Customer ID", order.CustomerID);
			newOrder.Add("Order No", order.OrderNo);
			newOrder.Add("Product ID", order.ProductID);
			newOrder.Add("Quantity", order.Qty);
			if (role == "Sales")
				newOrder.Add("Amount", order.Amt);
			yield return newOrder;
		}
		else
		{
			throw new InvalidDataException($"lang {lang} wrong");
		}
	}
}

public class Order
{
	public string OrderNo { get; set; }
	public string CustomerID { get; set; }
	public decimal Qty { get; set; }
	public string ProductID { get; set; }
	public decimal Amt { get; set; }
}

image

FAQ 常见问题

Q: Excel 表头标题名称跟 class 属性名称不一致,如何对应?

A. 请使用 ExcelColumnName 作 mapping

image

Q. 多工作表(sheet)如何导出/查询数据?

A. 使用 GetSheetNames 方法搭配 Query 的 sheetName 参数

var sheets = MiniExcel.GetSheetNames(path);
foreach (var sheet in sheets)
{
    Console.WriteLine($"sheet name : {sheet} ");
    var rows = MiniExcel.Query(path,useHeaderRow:true,sheetName:sheet);
    Console.WriteLine(rows);
}

image

Q. 是否使用 Count 会载入全部数据到内存

不会,图片测试一百万行*十列数据,简单测试,内存最大使用 < 60MB,花费13.65秒

image

Q. Query如何使用整数索引取值?

Query 预设索引为字串Key : A,B,C....,想要改为数字索引,请建立以下方法自行转换

void Main()
{
	var path = @"D:\git\MiniExcel\samples\xlsx\TestTypeMapping.xlsx";
	var rows = MiniExcel.Query(path,true);
	foreach (var r in ConvertToIntIndexRows(rows))
	{
		Console.Write($"column 0 : {r[0]} ,column 1 : {r[1]}");
		Console.WriteLine();
	}
}

private IEnumerable<Dictionary<int, object>> ConvertToIntIndexRows(IEnumerable<object> rows)
{
	ICollection<string> keys = null;
	var isFirst = true;
	foreach (IDictionary<string,object> r in rows)
	{
		if(isFirst)
		{
			keys = r.Keys;
			isFirst = false;
		}
		
		var dic = new Dictionary<int, object>();
		var index = 0;
		foreach (var key in keys)
			dic[index++] = r[key];
		yield return dic;
	}
}

Q. 导出时数组为空时生成没有标题空 Excel

因为 MiniExcel 使用类似 JSON.NET 动态从值获取类别机制简化 API 操作,没有数据就无法获取类别。可以查看 issue #133 了解。

image

强型别和 DataTable 会生成表头,但 Dicionary 依旧是空 Excel

Q. 如何人为空白行中止遍历?

常发生人为不小心在最后几行留下空白行情况,MiniExcel可以搭配 LINQ TakeWhile实现空白行中断遍历。

image

Q. 不想要空白行如何去除?

image

IEnumerable版本

public static IEnumerable<dynamic> QueryWithoutEmptyRow(Stream stream, bool useHeaderRow, string sheetName, ExcelType excelType, string startCell, IConfiguration configuration)
{
	var rows = stream.Query(useHeaderRow,sheetName,excelType,startCell,configuration);
	foreach (IDictionary<string,object> row in rows)
	{
		if(row.Keys.Any(key=>row[key]!=null))
			yield return row;
	}
}

DataTable版本

public static DataTable QueryAsDataTableWithoutEmptyRow(Stream stream, bool useHeaderRow, string sheetName, ExcelType excelType, string startCell, IConfiguration configuration)
{
	if (sheetName == null && excelType != ExcelType.CSV) /*Issue #279*/
		sheetName = stream.GetSheetNames().First();

	var dt = new DataTable(sheetName);
	var first = true;
	var rows = stream.Query(useHeaderRow,sheetName,excelType,startCell,configuration);
	foreach (IDictionary<string, object> row in rows)
	{
		if (first)
		{

			foreach (var key in row.Keys)
			{
				var column = new DataColumn(key, typeof(object)) { Caption = key };
				dt.Columns.Add(column);
			}

			dt.BeginLoadData();
			first = false;
		}

		var newRow = dt.NewRow();
		var isNull=true;
		foreach (var key in row.Keys)
		{
			var _v = row[key];
			if(_v!=null)
				isNull = false;
			newRow[key] = _v; 
		}
		
		if(!isNull)
			dt.Rows.Add(newRow);
	}

	dt.EndLoadData();
	return dt;
}

Q. 保存如何取代MiniExcel.SaveAs(path, value),文件存在系统会报已存在错误?

请改以Stream自行管控Stream行为,如

	using (var stream = File.Create("Demo.xlsx"))
		MiniExcel.SaveAs(stream,value);

从V1.25.0版本开始,支持 overwriteFile 參數,方便調整是否要覆蓋已存在文件

	MiniExcel.SaveAs(path, value, overwriteFile: true);

局限与警告

  • 目前不支援 xls (97-2003) 或是加密文件
  • xlsm 只支持查询

参考

ExcelDataReader / ClosedXML / Dapper / ExcelNumberFormat

感谢名单

Jetbrains

jetbrains-variant-2

感谢提供免费IDE支持此项目 (License)

Contributors

Apache License Version 2.0, January 2004 http://www.apache.org/licenses/ TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION 1. Definitions. "License" shall mean the terms and conditions for use, reproduction, and distribution as defined by Sections 1 through 9 of this document. "Licensor" shall mean the copyright owner or entity authorized by the copyright owner that is granting the License. "Legal Entity" shall mean the union of the acting entity and all other entities that control, are controlled by, or are under common control with that entity. For the purposes of this definition, "control" means (i) the power, direct or indirect, to cause the direction or management of such entity, whether by contract or otherwise, or (ii) ownership of fifty percent (50%) or more of the outstanding shares, or (iii) beneficial ownership of such entity. "You" (or "Your") shall mean an individual or Legal Entity exercising permissions granted by this License. "Source" form shall mean the preferred form for making modifications, including but not limited to software source code, documentation source, and configuration files. "Object" form shall mean any form resulting from mechanical transformation or translation of a Source form, including but not limited to compiled object code, generated documentation, and conversions to other media types. "Work" shall mean the work of authorship, whether in Source or Object form, made available under the License, as indicated by a copyright notice that is included in or attached to the work (an example is provided in the Appendix below). "Derivative Works" shall mean any work, whether in Source or Object form, that is based on (or derived from) the Work and for which the editorial revisions, annotations, elaborations, or other modifications represent, as a whole, an original work of authorship. For the purposes of this License, Derivative Works shall not include works that remain separable from, or merely link (or bind by name) to the interfaces of, the Work and Derivative Works thereof. "Contribution" shall mean any work of authorship, including the original version of the Work and any modifications or additions to that Work or Derivative Works thereof, that is intentionally submitted to Licensor for inclusion in the Work by the copyright owner or by an individual or Legal Entity authorized to submit on behalf of the copyright owner. For the purposes of this definition, "submitted" means any form of electronic, verbal, or written communication sent to the Licensor or its representatives, including but not limited to communication on electronic mailing lists, source code control systems, and issue tracking systems that are managed by, or on behalf of, the Licensor for the purpose of discussing and improving the Work, but excluding communication that is conspicuously marked or otherwise designated in writing by the copyright owner as "Not a Contribution." "Contributor" shall mean Licensor and any individual or Legal Entity on behalf of whom a Contribution has been received by Licensor and subsequently incorporated within the Work. 2. Grant of Copyright License. Subject to the terms and conditions of this License, each Contributor hereby grants to You a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare Derivative Works of, publicly display, publicly perform, sublicense, and distribute the Work and such Derivative Works in Source or Object form. 3. Grant of Patent License. Subject to the terms and conditions of this License, each Contributor hereby grants to You a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable (except as stated in this section) patent license to make, have made, use, offer to sell, sell, import, and otherwise transfer the Work, where such license applies only to those patent claims licensable by such Contributor that are necessarily infringed by their Contribution(s) alone or by combination of their Contribution(s) with the Work to which such Contribution(s) was submitted. If You institute patent litigation against any entity (including a cross-claim or counterclaim in a lawsuit) alleging that the Work or a Contribution incorporated within the Work constitutes direct or contributory patent infringement, then any patent licenses granted to You under this License for that Work shall terminate as of the date such litigation is filed. 4. Redistribution. You may reproduce and distribute copies of the Work or Derivative Works thereof in any medium, with or without modifications, and in Source or Object form, provided that You meet the following conditions: (a) You must give any other recipients of the Work or Derivative Works a copy of this License; and (b) You must cause any modified files to carry prominent notices stating that You changed the files; and (c) You must retain, in the Source form of any Derivative Works that You distribute, all copyright, patent, trademark, and attribution notices from the Source form of the Work, excluding those notices that do not pertain to any part of the Derivative Works; and (d) If the Work includes a "NOTICE" text file as part of its distribution, then any Derivative Works that You distribute must include a readable copy of the attribution notices contained within such NOTICE file, excluding those notices that do not pertain to any part of the Derivative Works, in at least one of the following places: within a NOTICE text file distributed as part of the Derivative Works; within the Source form or documentation, if provided along with the Derivative Works; or, within a display generated by the Derivative Works, if and wherever such third-party notices normally appear. The contents of the NOTICE file are for informational purposes only and do not modify the License. You may add Your own attribution notices within Derivative Works that You distribute, alongside or as an addendum to the NOTICE text from the Work, provided that such additional attribution notices cannot be construed as modifying the License. You may add Your own copyright statement to Your modifications and may provide additional or different license terms and conditions for use, reproduction, or distribution of Your modifications, or for any such Derivative Works as a whole, provided Your use, reproduction, and distribution of the Work otherwise complies with the conditions stated in this License. 5. Submission of Contributions. Unless You explicitly state otherwise, any Contribution intentionally submitted for inclusion in the Work by You to the Licensor shall be under the terms and conditions of this License, without any additional terms or conditions. Notwithstanding the above, nothing herein shall supersede or modify the terms of any separate license agreement you may have executed with Licensor regarding such Contributions. 6. Trademarks. This License does not grant permission to use the trade names, trademarks, service marks, or product names of the Licensor, except as required for reasonable and customary use in describing the origin of the Work and reproducing the content of the NOTICE file. 7. Disclaimer of Warranty. Unless required by applicable law or agreed to in writing, Licensor provides the Work (and each Contributor provides its Contributions) on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied, including, without limitation, any warranties or conditions of TITLE, NON-INFRINGEMENT, MERCHANTABILITY, or FITNESS FOR A PARTICULAR PURPOSE. You are solely responsible for determining the appropriateness of using or redistributing the Work and assume any risks associated with Your exercise of permissions under this License. 8. Limitation of Liability. In no event and under no legal theory, whether in tort (including negligence), contract, or otherwise, unless required by applicable law (such as deliberate and grossly negligent acts) or agreed to in writing, shall any Contributor be liable to You for damages, including any direct, indirect, special, incidental, or consequential damages of any character arising as a result of this License or out of the use or inability to use the Work (including but not limited to damages for loss of goodwill, work stoppage, computer failure or malfunction, or any and all other commercial damages or losses), even if such Contributor has been advised of the possibility of such damages. 9. Accepting Warranty or Additional Liability. While redistributing the Work or Derivative Works thereof, You may choose to offer, and charge a fee for, acceptance of support, warranty, indemnity, or other liability obligations and/or rights consistent with this License. However, in accepting such obligations, You may act only on Your own behalf and on Your sole responsibility, not on behalf of any other Contributor, and only if You agree to indemnify, defend, and hold each Contributor harmless for any liability incurred by, or claims asserted against, such Contributor by reason of your accepting any such warranty or additional liability. END OF TERMS AND CONDITIONS APPENDIX: How to apply the Apache License to your work. To apply the Apache License to your work, attach the following boilerplate notice, with the fields enclosed by brackets "[]" replaced with your own identifying information. (Don't include the brackets!) The text should be enclosed in the appropriate comment syntax for the file format. We also recommend that a file or class name and description of purpose be included on the same "printed page" as the copyright notice for easier identification within third-party archives. Copyright [yyyy] [name of copyright owner] Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0 Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.

简介

简单、高效避免OOM的.NET处理Excel查、写、模版填充数据工具。 展开 收起
C#
Apache-2.0
取消

发行版

暂无发行版

贡献者

全部

近期动态

不能加载更多了
马建仓 AI 助手
尝试更多
代码解读
代码找茬
代码优化
C#
1
https://gitee.com/lazy-pg/MiniExcel.git
git@gitee.com:lazy-pg/MiniExcel.git
lazy-pg
MiniExcel
MiniExcel
master

搜索帮助