wpf - 部分声明，一定不能指定不同的基类？

Question

当我改变这个时:

public partial class FrmCategories : UserControl

到这里:

public partial class FrmCategories : MyUserControl

其中 MyUserControl 继承自 UserControl。

我收到了这个错误:

Error 2 Partial declarations of 'WpfTest.FrmCategories' must not specify different base classes

\Projects\WpfTest\WpfTest\FrmCategories.xaml.cs 21 26 WpfTest

XAML:

<UserControl x:Class="WpfTest.FrmCategories"
             xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
             xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"

             xmlns:we="clr-namespace:WpfTest"
             xmlns:d="http://schemas.microsoft.com/expression/blend/2008" 
             mc:Ignorable="d" Background="Azure" Height="131" Width="229">
    <StackPanel Margin="5,24,5,0" Name="catFrm" Height="75" VerticalAlignment="Top">

我正在开始 WPF(正如项目名称所暗示的那样)，所以我预计这里会出现一个微不足道的错误

Answer 1

您需要更改 XAML 文件的根元素:

<we:MyUserControl x:Class="WpfTest.FrmCategories"
             xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
             xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
             xmlns:we="clr-namespace:WpfTest"
             xmlns:d="http://schemas.microsoft.com/expression/blend/2008" 
             mc:Ignorable="d" Background="Azure" Height="131" Width="229">
    <StackPanel Margin="5,24,5,0" Name="catFrm" Height="75" VerticalAlignment="Top">
</we:MyUserControl>