在 C# 中，如何将刷新/重绘消息发送到 WPF 网格或画布?

In C#, how do you send a refresh/repaint message to a WPF grid or canvas?(在 C# 中，如何将刷新/重绘消息发送到 WPF 网格或画布?)

问题描述

如何向 WPF 网格或画布发送刷新消息?

How do you send a refresh message to a WPF grid or canvas?

换句话说，我注意到在调试模式下，我可以编写代码将一行发送到显示器，然后，如果该行不正确，我可以调整它——但前一行仍然存在.现在，我正在编写的代码根据用户点击的内容向显示器发送信息.所以这一定意味着每次新的一组行和框以及文本进入 WPF 中的网格或画布时，都不会刷新显示.

In other words, I have noticed while in debug mode, I can write code that sends a line to the display and then, if that line is not right, I can adjust it -- but the previous line is still there. Now, the code I am writing sends information to the display based on what the user clicks. So this must mean that the display is not refreshed each time a new set of lines and boxes and text goes to the grid or canvas in WPF.

使用 C# 代码，如何将刷新/重绘消息发送到 WPF 网格或画布?

Using C# code, how do you send a refresh/repaint message to a WPF grid or canvas?

推荐答案

刷新更新 Winforms 等 WPF 控件

public static class ExtensionMethods
{
   private static Action EmptyDelegate = delegate() { };

   public static void Refresh(this UIElement uiElement)
   {
      uiElement.Dispatcher.Invoke(DispatcherPriority.Render, EmptyDelegate);
   }
}

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