我正在尝试制作一个控制台应用程序,以解决这里的问题。
我已经将源代码放在Git Hub上。
控制台应用程序项目文件为:
<Project Sdk="Microsoft.NET.Sdk">
<PropertyGroup>
<OutputType>Exe</OutputType>
<TargetFrameworks>netcoreapp3.1;net472</TargetFrameworks>
</PropertyGroup>
<ItemGroup>
<ProjectReference Include="..\mopcore\MopCore.csproj" />
<ProjectReference Include="..\MopFW\MopFW.csproj" />
</ItemGroup>
</Project>
Program.cs is
using System;
using System.Linq;
using MopCore;
using MopFW; // error shows here
namespace ConsoleAppCore2
{
class Program
{
static void Main(string[] args)
{
Console.WriteLine("Hello World!");
CountMopsCore();
CountMopsFramework();
}
private static void CountMopsCore()
{
Console.WriteLine($"Hi");
using (var context = new MopContext())
{
var num = context.Mops.Count();
Console.WriteLine($"There are {num} mops \r\n providern {context.Database.ProviderName}");
}
Console.ReadKey();
}
private static void CountMopsFramework()
{
Console.WriteLine($"Hi");
using (var context = new MopFW.MopContext())
{
var num = context.Mops.Count();
Console.WriteLine($"There are {num} mops \r\n in {context.Database.Connection.ConnectionString}");
}
Console.ReadKey();
}
}
}
netcoreapp3.1项目文件是什么
<Project Sdk="Microsoft.NET.Sdk">
<PropertyGroup>
<TargetFramework>netcoreapp3.1</TargetFramework>
<AssemblyName>MopCore</AssemblyName>
<RootNamespace>MopCore</RootNamespace>
</PropertyGroup>
<ItemGroup>
<PackageReference Include="Microsoft.EntityFrameworkCore" Version="3.1.4" />
</ItemGroup>
</Project>
框架项目文件是
<Project Sdk="Microsoft.NET.Sdk">
<PropertyGroup>
<TargetFramework>net472</TargetFramework>
</PropertyGroup>
<ItemGroup>
<PackageReference Include="EntityFramework" Version="6.4.4" />
</ItemGroup>
</Project>
我遇到编译错误。
Error NU1201 Project MopCore is not compatible with net472 (.NETFramework,Version=v4.7.2). Project MopCore supports: netcoreapp3.1 (.NETCoreApp,Version=v3.1) ConsoleAppCore2 C:\Users\kirst\source\repos\MopData\ConsoleAppCore2\ConsoleAppCore2.csproj 1
[更新] 我知道最好的方法是使用.netstandard。
但是我想探索一下如何让.netcore和.net472一起工作。
在将控制台项目更正为
<Project Sdk="Microsoft.NET.Sdk">
<PropertyGroup>
<OutputType>Exe</OutputType>
<TargetFrameworks>netcoreapp3.1;net472</TargetFrameworks>
</PropertyGroup>
<ItemGroup Condition=" '$(TargetFramework)' == 'netcoreapp3.1' ">
<ProjectReference Include="..\mopcore\MopCore.csproj" />
</ItemGroup>
<ItemGroup Condition=" '$(TargetFramework)' == 'net472' ">
<ProjectReference Include="..\MopFW\MopFW.csproj" />
</ItemGroup>
</Project>
我仍然在program.cs中遇到构建错误。
![build errors](https://istack.dev59.com/fZCQj.webp)
MopFW
进行引用时,你如何期望它是有效的呢?你可以使用#if
指令来构建控制台应用程序中适当版本的代码。 - Jon Skeet