Question

我在使用WPF时遇到控制绑定时遇到一些困难，我希望你可以通过这个简单的例子来帮助我理解它。

您能解释一下为什么这不起作用，也是一种让它运行的简单方法吗？

我看了很多教程，但在这个阶段它们对我来说仍然有点先进，我认为所以非常感谢任何帮助。

谢谢！

XAML：

<Window
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:d="http://schemas.microsoft.com/expression/blend/2008" xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" mc:Ignorable="d" x:Class="DemoProject.MainWindow"
    xmlns:custom="clr-namespace:DemoProject"
    Title="DemoProject" >

    <TextBox x:Name="MyTextBox">
        <TextBox.InputBindings>
            <KeyBinding Key="Enter" Command="{x:Static custom:MainWindow.CommandEnterKeyPressed}" 
                CommandParameter="{Binding Path=Text, RelativeSource={RelativeSource AncestorType={x:Type TextBox}}}" />
        </TextBox.InputBindings>
    </TextBox>

    <Window.CommandBindings>
        <CommandBinding Command="{x:Static custom:MainWindow.CommandEnterKeyPressed}"
            Executed="CommandEnterKeyPressedExecuted" />
    </Window.CommandBindings>   
</Window>

C＃：

namespace DemoProject
{
    public partial class MainWindow : Window
    { 
        private static RoutedUICommand CommandEnterKeyPressed;

        public MainWindow()
        {
            InitializeComponent();
        }

        public static RoutedUICommand CommandEnterKeyPressed = new RoutedUICommand();

        private void CommandEnterKeyPressedExecuted(object sender, CanExecuteRoutedEventArgs e)
        {
            MessageBox.Show("Enter key was pressed");
        }
    }
}

当我运行时，我收到错误

＆＃34;会员＆＃34; CommandEnterKeyPressed＆＃34;不被承认或不被认可访问＆＃34;并且＆＃34;＆＃34;＆＃39; ommandEnterKeyPressed＆＃39;火柴委托＆＃39; System.Windows.Input.ExecutedRoutedEventHandler＆＃39;＆＃34;。

我有什么简单的遗失吗？

感谢。

Answer 1

将CanExecuteRoutedEventArgs更改为ExecutedRoutedEventArgs

private void CommandEnterKeyPressedExecuted(object sender, CanExecuteRoutedEventArgs e)

应该是

private void CommandEnterKeyPressedExecuted(object sender, ExecutedRoutedEventArgs e)

CanExecuteRoutedEventArgs用于CanExecute事件。您还应该删除此行

private static RoutedUICommand CommandEnterKeyPressed;

并仅保留RoutedUICommand

的公开声明

麻烦简单的C＃WPF自定义控件

1 个答案: