Yoko.Excel.Core 1.0.1

There is a newer version of this package available.
See the version list below for details.
dotnet add package Yoko.Excel.Core --version 1.0.1
NuGet\Install-Package Yoko.Excel.Core -Version 1.0.1
This command is intended to be used within the Package Manager Console in Visual Studio, as it uses the NuGet module's version of Install-Package.
<PackageReference Include="Yoko.Excel.Core" Version="1.0.1" />
For projects that support PackageReference, copy this XML node into the project file to reference the package.
paket add Yoko.Excel.Core --version 1.0.1
#r "nuget: Yoko.Excel.Core, 1.0.1"
#r directive can be used in F# Interactive and Polyglot Notebooks. Copy this into the interactive tool or source code of the script to reference the package.
// Install Yoko.Excel.Core as a Cake Addin
#addin nuget:?package=Yoko.Excel.Core&version=1.0.1

// Install Yoko.Excel.Core as a Cake Tool
#tool nuget:?package=Yoko.Excel.Core&version=1.0.1

Yoko.Excel.Core

  • .NETCore的Excel导出工具,解决十万百万级大数据导出Excel内存占用问题

  • 建议使用IDataReader

特点

  • 低内存耗用,避免OOM、频繁 FullGC 情况
  • 轻量,不需要安装 Microsoft Office、COM+,DLL小于150KB

安装

NuGet搜索 Yoko.Excel.Core

导出 Excel

除非必要,不要用 ToList,ToDatatable 等方法读取全部数据到内存!!!

除非必要,不要用 ToList,ToDatatable 等方法读取全部数据到内存!!!

除非必要,不要用 ToList,ToDatatable 等方法读取全部数据到内存!!!

1. IDataReader
  • 推荐使用,可以避免载入全部数据到内存
YokoExcel.SaveAs(path, reader);
  • DataReader 单表格导出方式 (示例使用 SqlSugar )
var path = Path.Combine(@"D:\App.Excel\", $"{Guid.NewGuid()}.xlsx");
//=========== SqlSugar ===========
//强制类型ISugarQueryable
 var db = GetDB();  
//订单数据
var data = db.Queryable<TradeOrder>()
       .Where(x => SqlFunc.Between(x.AddTime, "2021-08-01 00:00:00", "2021-08-01 08:00:00"));
var sql = data.Clone().ToSql();
using var reader = db.Ado.GetDataReader(sql.Key, sql.Value);
//===============================
//自定义字段映射
 var fieldMapping = new List<FieldMapping>()
 {
       new FieldMapping()
       {
             FieldID = "OrderID",
             FieldName = "订单ID"
       },
       new FieldMapping()
       {
             FieldID = "CityCode",
             FieldName = "城市编号",
             FieldDefinition = new Hashtable{
                  { "012345","A城市"},
                  { "456789","B城市"}
             }
        }
  };
//导出-原始数据
YokoExcel.SaveAs(path, reader);
//导出-部分自定义映射数据
//YokoExcel.SaveAs(path, reader, fieldMapping, "订单报表");
//TODO: 手动关闭
reader.Close();
2. 支持集合<匿名类别>
var path = Path.Combine(Path.GetTempPath(), $"{Guid.NewGuid()}.xlsx");
YokoExcel.SaveAs(path, new[] {
    new { Column1 = "YokoExcel001", Column2 = 1 },
    new { Column1 = "YokoExcel002", Column2 = 2}
});
3. IEnumerable<IDictionary<string, object>>
var values = new List<Dictionary<string, object>>()
{
    new Dictionary<string,object>{{ "Col1", "YokoExcel001" }, { "Col0001", 1 } },
    new Dictionary<string,object>{{ "Col2", "YokoExcel002" }, { "Col0002", 2 } }
};
YokoExcel.SaveAs(path, values);
4. Datatable
  • 不推荐使用,会将数据全载入内存
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("YokoExcel111", 1);
    table.Rows.Add("YokoExcel222", 2);
}
YokoExcel.SaveAs(path, table);
5. SaveAs 支持 Stream
  • 生成文件不落地
using (var stream = new MemoryStream()) //支持 FileStream,MemoryStream..等
{
    stream.SaveAs(values);
}
  • DemoAPI 导出 Excel
public IActionResult DownloadExcel()
{
    var values = new[] {
        new { Column1 = "YokoExcel", Column2 = 1 },
        new { Column1 = "YokoExcel222", 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 = "demo001.xlsx"
    };
}
Product Compatible and additional computed target framework versions.
.NET net5.0 is compatible.  net5.0-windows was computed.  net6.0 was computed.  net6.0-android was computed.  net6.0-ios was computed.  net6.0-maccatalyst was computed.  net6.0-macos was computed.  net6.0-tvos was computed.  net6.0-windows was computed.  net7.0 was computed.  net7.0-android was computed.  net7.0-ios was computed.  net7.0-maccatalyst was computed.  net7.0-macos was computed.  net7.0-tvos was computed.  net7.0-windows was computed.  net8.0 was computed.  net8.0-android was computed.  net8.0-browser was computed.  net8.0-ios was computed.  net8.0-maccatalyst was computed.  net8.0-macos was computed.  net8.0-tvos was computed.  net8.0-windows was computed. 
.NET Core netcoreapp2.0 was computed.  netcoreapp2.1 was computed.  netcoreapp2.2 was computed.  netcoreapp3.0 was computed.  netcoreapp3.1 was computed. 
.NET Standard netstandard2.0 is compatible.  netstandard2.1 was computed. 
.NET Framework net461 was computed.  net462 was computed.  net463 was computed.  net47 was computed.  net471 was computed.  net472 was computed.  net48 was computed.  net481 was computed. 
MonoAndroid monoandroid was computed. 
MonoMac monomac was computed. 
MonoTouch monotouch was computed. 
Tizen tizen40 was computed.  tizen60 was computed. 
Xamarin.iOS xamarinios was computed. 
Xamarin.Mac xamarinmac was computed. 
Xamarin.TVOS xamarintvos was computed. 
Xamarin.WatchOS xamarinwatchos was computed. 
Compatible target framework(s)
Included target framework(s) (in package)
Learn more about Target Frameworks and .NET Standard.

NuGet packages

This package is not used by any NuGet packages.

GitHub repositories

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Version Downloads Last updated
1.4.3 564 4/24/2023
1.4.2 717 10/28/2022
1.4.1 743 10/27/2022
1.4.0 771 10/27/2022
1.3.28 738 10/24/2022
1.3.2 741 5/7/2022
1.3.1 805 4/29/2022
1.3.0 740 4/14/2022
1.2.0 807 4/7/2022
1.0.1 763 3/29/2022