在WPF更改按钮的内容 [英] Change button content in WPF

问题描述

我有：

private void button1_MouseEnter(object sender, EventArgs e)
{
    for (int i = 0; i > 2; i++) 
    {     
        button1.Content = Convert.ToString(i);
        System.Threading.Thread.Sleep(1000);     
    }

    tekst.Text = "Mouse Enter";
}

当我在按钮进入我只看到的 鼠标进入 的，但内容在按钮不会改变。为什么？我能做什么错了？

When I enter on Button I see only Mouse Enter, but Content on Button don't change. Why? What I can do wrong?

推荐答案

您的循环永远不会执行，因为你有错的情况下，将其更改为以下code：

Your for loop never execute because you have wrong condition, change it to following code:

的for（int i = 0;我2;我++）

此外，你应该使用的BackgroundWorker （<一个href=\"http://msdn.microsoft.com/en-us/library/system.componentmodel.backgroundworker%28v=vs.100%29.aspx\"相对=nofollow> MSDN ）来更新你的GUI动态地。

Also you should use BackgroundWorker (msdn) to update your GUI dynamicly.

private void button1_MouseEnter(object sender, MouseEventArgs e)
{
    BackgroundWorker worker = new BackgroundWorker();
    worker.DoWork += delegate
    {
        for (int i = 0; i < 2; i++)
        {
            this.Dispatcher.Invoke((Action)(() => { btn.Content = Convert.ToString(i); }));
            System.Threading.Thread.Sleep(1000);
        }                
    };
    worker.RunWorkerCompleted += delegate { tekst.Text = "Mouse Enter"; };
    worker.RunWorkerAsync();
}

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