异步任务中的C#更改标签文本 [英] C# in Async Task change Label Text

问题描述

以下代码不会更改文本并停止执行任务

The following Code does not change the Text and stops executing the Task

private void button1_Click(object sender, EventArgs e)
    {
        label1.Text = "Test";
        Task.Run(() => MyAsyncMethod());
    }

    public async Task MyAsyncMethod()
    {
        label1.Text = "";
        //everything from here on will not be executed
    }

如果您可以将异步与UI一起使用，

would be really handy if you could use async together with the UI

推荐答案

，用于通过您需要调用的第二个线程访问GUI控件. 以下示例显示了如何正确设置标签文本

for accessing a GUI control through a second thread you need to invoke. following example shows how to set a label's text properly

  private void setLabel1TextSafe(string txt)
  { 
       if(label1.InvokeRequired)
           label1.Invoke(new Action(() => label1.Text = txt));
       else
           label1.Text = txt;
  }

我希望这可以解决您的问题

I hope this solves your problem

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