自定义标记扩展返回 RoutedEvents

发布于 2024-09-07 19:32:02 字数 1369 浏览 6 评论 0原文

我正在尝试为“关闭”按钮创建一个通用事件，它们必须关闭窗口，但在此之前将焦点设置到所有者窗口。我不想为每个文件都创建一个事件，因为这非常不切实际，因为我的应用程序中有 30 多个窗口。（所以如果我想改变这种行为，我每次都必须改变 30 个文件）

我不确定这是否是正确的方法，但我尝试制作一个标记扩展，它返回一个 delegate(object sender, RoutedEventArgs e) 下面是代码：

delegate void RoutedDelegate(object sender, RoutedEventArgs e);
[MarkupExtensionReturnType(typeof(RoutedEvent))]
public class CloseWindowExtension : MarkupExtension
{
    Window win = null;

    public Window Win
    {
        get { return this.win; }
        set { this.win = value; }
    }

    public CloseWindowExtension(Window win)
        : base()
    {
        this.win = win;
    }



    public override object ProvideValue(IServiceProvider serviceProvider)
    {
        if (win == null)
        {
            throw new InvalidOperationException("The window must be specified!");
        }

        return new RoutedDelegate(delegate(object sender, RoutedEventArgs e)
        {
            Extensions.FocusClose(win);
        });
    }
}

FocusClose 方法获取一个窗口，关闭它，但之前将焦点设置给其所有者。但我无法让它发挥作用。当我在 xaml 中设置按钮

Button Click="{e:CloseWindow {Binding win}}"

（win 是我的窗口名称）时，收到错误消息：

Click="{e:CloseWindow {Binding win}}" 无效。 “{e:CloseWindow {Binding win}}”不是有效的事件处理程序方法名称。只有生成的类或代码隐藏类上的实例方法才有效。第 28 行位置 17.

我做错了什么吗？这是最好的方法还是我还有其他选择？提前致谢！

克拉克

原文

I'm trying to create a generalized event for my Close buttons, where they have to close the window but before that set focus to the owner window. I don't want to have an event for every file for that, because that'd be pretty unpractical since I have 30+ windows in my application. (So if I wanted to change that behavior, i'd have to change on 30 files everytime)

I'm not sure if that's the correct approach, but I tried making a MarkUp Extension which returns a delegate(object sender, RoutedEventArgs e) Here is the code:

delegate void RoutedDelegate(object sender, RoutedEventArgs e);
[MarkupExtensionReturnType(typeof(RoutedEvent))]
public class CloseWindowExtension : MarkupExtension
{
    Window win = null;

    public Window Win
    {
        get { return this.win; }
        set { this.win = value; }
    }

    public CloseWindowExtension(Window win)
        : base()
    {
        this.win = win;
    }



    public override object ProvideValue(IServiceProvider serviceProvider)
    {
        if (win == null)
        {
            throw new InvalidOperationException("The window must be specified!");
        }

        return new RoutedDelegate(delegate(object sender, RoutedEventArgs e)
        {
            Extensions.FocusClose(win);
        });
    }
}

The FocusClose method gets a window, closes it, but sets focus to its owner before. But I can't make it work. When i set my button in the xaml,

Button Click="{e:CloseWindow {Binding win}}"

(win is my Window name), I get the error message:

Click="{e:CloseWindow {Binding win}}" is not valid. '{e:CloseWindow {Binding win}}' is not a valid event handler method name. Only instance methods on the generated or code-behind class are valid. Line 28 Position 17.

Am I doing something wrong? Is this the best approach or do I have another options?
Thanks in advance!

Clark

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