WPF应用出新

环境

Windows 11
Visual Studio 2022
.NET SDK 6

下载https://github.com/microsoft/AppConsult-WinAppsModernizationWorkshop/releases/download/1.1/WinAppsModernizationWorkshop.zip并解压，里面有6个练习。

Part 1: Migrate the Contoso Expenses app to .NET Core 3

进入Exercise1 的01-Start目录（里面有ContosoExpenses.csproj），创建ContosoExpenses.Core.csproj内容如下：

<Project Sdk="Microsoft.NET.Sdk.WindowsDesktop">

  <PropertyGroup>
    <OutputType>WinExe</OutputType>
    <TargetFramework>netcoreapp6.0</TargetFramework>
    <UseWPF>true</UseWPF>
 </PropertyGroup>

</Project>

将ContosoExpenses.Core.csproj添加到解决方案。

对于ContosoExpenses.Data，直接将其替换成：

<Project Sdk="Microsoft.NET.Sdk">

  <PropertyGroup>
    <TargetFramework>netstandard2.0</TargetFramework>
  </PropertyGroup>

</Project>

关于.NET Standard和.NET Framework的区别，看https://docs.microsoft.com/en-us/dotnet/standard/net-standard

删除ContosoExpenses.Data的Packages.config，添加最新的NuGet包Bogus和LiteDB。

打开ContosoExpenses.Data.csproj，可以看到：

    <ItemGroup>
      <PackageReference Include="Bogus" Version="34.0.1" />
      <PackageReference Include="LiteDB" Version="5.0.11" />
    </ItemGroup>

回到ContosoExpenses.Core，删除其Packages.config，添加最新的NuGet包：

MvvmLightLibsStd10 （其实已经被标注废弃了）
Unity

次级依赖的包会自动添加。

ContosoExpenses.Core添加一个到ContosoExpenses.Data的引用。

将<GenerateAssemblyInfo>false</GenerateAssemblyInfo>添加到ContosoExpenses.Core和ContosoExpenses.Data，避免生成重复的配装件属性。

构建工程，可以看到错误：

Services\RegistryService.cs(9,26,9,34): error CS0103: The name 'Registry' does not exist in the current context Services\RegistryService.cs(12,26,12,34): error CS0103: The name 'Registry' does not exist in the current context Services\RegistryService.cs(12,97,12,123): error CS0103: The name 'RegistryKeyPermissionCheck' does not exist in the current context

解决办法是给ContosoExpenses.Data安装Microsoft.Windows.Compatibility这个NuGet包（一个相当大的NuGet包）。然后ContosoExpenses.Data就可以构建成功。

接下来构建ContosoExpenses.Core，出现一下错误：

Error	NETSDK1136	The target platform must be set to Windows (usually by including '-windows' in the TargetFramework property) when using Windows Forms or WPF, or referencing projects or packages that do so.	ContosoExpenses.Core

解决办法是将<TargetFramework>netcoreapp6.0</TargetFramework>改成<TargetFramework>net6.0-windows</TargetFramework>，参考 How to solve the error ：NETSDK1136 #14297

ContosoExpenses.Core可构建成功，但之后运行出现：

IOException: Cannot locate resource 'images/expensesbackground.jpg'.

需要编辑ContosoExpenses.Core.csproj文件，添加：

<ItemGroup>
  <Content Include="Images/*">
    <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
  </Content>
</ItemGroup>

然后在ContosoExpenses.Core的辖属中，将Icon改为Images\contoso.ico。

改完之后，终于成功运行，满头大汗~

Part 1: Migrate the Contoso Expenses app to .NET Core 3#

Part 1: Migrate the Contoso Expenses app to .NET Core 3