如果您正在使用Xamarin Forms，并且您移动了一个XAML文件，那么该文件的“构建操作”将被更改。Xamarin Forms要求“构建动作=嵌入式资源”。

在Visual Studio中应用“build action”:

选择XAML文件-> Properties -> Build Action = Embedded Resource

I had a problem similar to this in WPF. I had copied a usercontrol but had forgotten to rename the public ViewModel property in its.xaml.cs file for it. But still wasn't working. I eventually deleted all of the files inside the obj\debug type of folder for the project (we had this named differently). And rebuilt it. It still wasn't working, and I exited Visual Studio. (Before this I had at one point two instances of Visual Studio I think maybe.) The problem I had was that it was reporting it had this error when I had already fixed it! When I came back into Visual Studio (after deleting the debug stuff in obj), there finally was no error indicator. Then I rebuilt the project and now all was good!

这和我之前做的顺序不一样。它需要被简化。

我在把沙玛林的溶液转化成毛伊岛。

我需要更改MyPage。xaml文件属性/构建操作

来自“嵌入式资源”(在Xamarin中使用的方式)

到“MauiXaml”(在毛伊岛使用)。

我还必须清除属性/自定义工具。

右键单击项目中的文件夹以创建新的UserControl，这是我的问题。 我在文件夹外创建了相同的控件，就是这样。

导致这个错误的另一个常见原因是:

Right click on folder in project to create new UserControl. This creates a class and xaml file that derives from user control in the namespace of the folder. Then you decide to change the namespace of the class because you're really just using folders for organization of code. The x:Class attribute will not get automatically updated so it will be searching for a class that doesn't exist. Could probably use a better error message like "x:Class type could not be found in namesace bla.blaa.blaaa."

如果您正在使用Xamarin Forms，并且您移动了一个XAML文件，那么该文件的“构建操作”将被更改。Xamarin Forms要求“构建动作=嵌入式资源”。

在Visual Studio中应用“build action”:

选择XAML文件-> Properties -> Build Action = Embedded Resource