如何安裝實體框架核心？

Question

我正在嘗試安裝以下 nuget package：

install-package microsoft.entityframeworkcore.sqlserver

但是我得到了這個例外：

Restoring packages for C:\Users\alex.ggg\source\repos\ccp\ccp.Rag\ccp.Rag.csproj...
install-package : NU1202: Package Microsoft.EntityFrameworkCore.SqlServer 6.0.0 is not 
compatible with netcoreapp3.1 (.NETCoreApp,Version=v3.1). Package 
Microsoft.EntityFrameworkCore.SqlServer 6.0.0 supports: net6.0 (.NETCoreApp,Version=v6.0)
At line:1 char:1
+ install-package microsoft.entityframeworkcore.sqlserver -ProjectName  ...
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    + CategoryInfo          : NotSpecified: (:) [Install-Package], Exception
    + FullyQualifiedErrorId : NuGetCmdletUnhandledException,NuGet.PackageManagement.Powe 
   rShellCmdlets.InstallPackageCommand
 
install-package : Package restore failed. Rolling back package changes for 'ccp.Rag'.
At line:1 char:1
+ install-package microsoft.entityframeworkcore.sqlserver -ProjectName  ...
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    + CategoryInfo          : NotSpecified: (:) [Install-Package], Exception
    + FullyQualifiedErrorId : NuGetCmdletUnhandledException,NuGet.PackageManagement.Powe 
   rShellCmdlets.InstallPackageCommand
 
Time Elapsed: 00:00:00.4679650

我們如何安裝 entityframeworkcore？

Answer 1

您的目標似乎是netcoreapp3.1 ，因此請嘗試安裝最新的 3.1 版本的 package：

Install-Package Microsoft.EntityFrameworkCore.SqlServer -Version 3.1.21