使用'Add New Scaffolded Item' 'MVC Controller with Views'代码生成器的 c# 错误

Question

当我从MVC视图页面的Controller文件夹中生成"新脚手架项目"时，我收到一条错误消息。

图像[

控制器文件夹

添加新的脚手架项目

添加带有视图的MVC控制器

错误代码"；Microsoft Visual Studio"；

]

这是我用过的模型。

public class Product
{
[Key]
public int ProductID { get; set; }
[Required (ErrorMessage = "Please enter a product name.")]
[StringLength(40)]
public int ProductName { get; set; }
[Required (ErrorMessage = "Please enter a product price.")]
[Column(TypeName = "decimal(8, 2)")]
public decimal Price { get; set; }

[Required (ErrorMessage = "Please enter a product Description.")]
public int Description { get; set; }
public byte [] Picture { get; set; }
public int StockID { get; set; }
public Stock Stock { get; set; }
[Required(ErrorMessage = "Please enter a product Category.")]
public int CategoryID { get; set; }
public Category Category { get; set; }
public string IdentityID { get; set; }
public IdentityUser Identity { get; set; }
}

应用程序.csproj

<Project Sdk="Microsoft.NET.Sdk.Web">
<PropertyGroup>
<TargetFramework>netcoreapp3.1</TargetFramework>
</PropertyGroup>

<ItemGroup>
<PackageReference Include="AutoMapper" Version="10.1.1" />
<PackageReference Include="Microsoft.AspNetCore.Authentication.Facebook" 
Version="3.1.12" />
<PackageReference Include="Microsoft.AspNetCore.Authentication.Google" 
Version="3.1.12" />
<PackageReference 
Include="Microsoft.AspNetCore.Identity.EntityFrameworkCore" 
Version="3.1.12" />
<PackageReference Include="Microsoft.EntityFrameworkCore.Sqlite" 
Version="3.1.12" />
<PackageReference Include="Microsoft.EntityFrameworkCore.SqlServer" 
Version="3.1.12" />
<PackageReference Include="Microsoft.EntityFrameworkCore.Tools" 
Version="3.1.12">
<PrivateAssets>all</PrivateAssets>
<IncludeAssets>runtime; build; native; contentfiles; analyzers; 
buildtransitive</IncludeAssets>
</PackageReference>
<PackageReference Include="Microsoft.Extensions.DependencyInjection" 
Version="3.1.12" />
<PackageReference 
Include="Microsoft.VisualStudio.Web.CodeGeneration.Design" 
Version="3.1.5" />
</ItemGroup>
</Project>

Answer 1

这似乎是由于它们之间的版本不匹配，您可以如下修改Application.csproj：

<ItemGroup>
<PackageReference Include="AutoMapper" Version="10.1.1" />
<PackageReference Include="Microsoft.AspNetCore.Authentication.Facebook" Version="3.1.12" />
<PackageReference Include="Microsoft.AspNetCore.Authentication.Google" Version="3.1.12" />
<PackageReference Include="Microsoft.EntityFrameworkCore.Sqlite" Version="3.1.13" />
<PackageReference Include="Microsoft.EntityFrameworkCore.SqlServer" Version="3.1.13" />
<PackageReference Include="Microsoft.AspNetCore.Identity.EntityFrameworkCore" Version="3.1.13" />
<PackageReference Include="Microsoft.EntityFrameworkCore.Tools" Version="3.1.13">
<PrivateAssets>all</PrivateAssets>
<IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
</PackageReference>
<PackageReference Include="Microsoft.Extensions.DependencyInjection" Version="3.1.13" />
<PackageReference Include="Microsoft.VisualStudio.Web.CodeGeneration.Design" Version="3.1.5" />
</ItemGroup>