C#如何用另一个单击事件终止单击事件处理程序

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我对形成ssh连接的按钮有一个点击事件处理程序。我想通过单击另一个“取消”按钮来终止此功能。

但是,在执行事件处理程序时,在第一个处理程序执行时“取消”单击事件处理程序不会运行。我想用“取消”处理程序覆盖第一个处理程序。

private void button_sshconnection_Click(object sender, EventArgs e)
        { /* some code to create ssh connection */ }

private void button_cancel_Click(object sender, EventArgs e)
        { /* some code to terminate button_sshconnection_Click */ }

我尝试了类似于上述代码的代码结构,但是正如我所说的那样,第二个函数在第一个函数运行时不会运行。如果结构错误,有人可以告诉我如何完成这项工作。

提前致谢,

奥努尔

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  • qqgsd 回复

    您可以尝试实现例程的异步版本,例如

       private CancellationTokenSource m_Cancellation;
    
       private async void button_sshconnection_Click(object sender, EventArgs e) {
         // if method is executing, do nothing. Alternative: cancel and start again   
         if (m_Cancellation != null)
           return;
    
         try { 
           using (m_Cancellation = new CancellationTokenSource()) {
             var token = m_Cancellation.Token;
    
             await Task.Run(() => {
               //TODO: implement your logic here, please, note that cancellation is cooperative
               // that's why you should check token.IsCancellationRequested
    
             }, token);
           }
         }
         finally {
           m_Cancellation = null;  
         }
       }
    
       private void button_cancel_Click(object sender, EventArgs e) {
         // If we can cancel, do it
         m_Cancellation?.Cancel();
       }