Cross-thread InvalidOperationException

最新推荐文章于 2022-04-16 23:40:35 发布

zexu82

最新推荐文章于 2022-04-16 23:40:35 发布

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分类专栏： C# 文章标签： timer textbox windows thread object class

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本文介绍了一种解决Windows组件在不同线程间访问引发的Cross-thread InvalidOperationException的方法。通过使用委托和Invoke方法，确保UI更新总是在创建该组件的主线程中执行。

windows not allowed the component be accessed by the thread which doesn't create it.

it will cause error Cross-thread InvalidOperationException

public Form1() {

InitializeComponent();

Control.CheckForIllegalCrossThreadCalls = false;

}

delegate

public partial class Form1 : Form
{
public delegate void delegate_boundTreeView(); // delegate
public delegate_boundTreeView myDelegateBoundTreeView;

private System.Timers.Timer timer_refresh = new System.Timers.Timer(60000); // another thread

Form1()
{
boundTreeView (); // main thread

  myDelegateBoundTreeView = new delegate_boundTreeView(boundTreeView);
  timer_refresh.Elapsed += new ElapsedEventHandler(timer_refresh_Elapsed);
  timer_refresh.Start();
}

public void boundTreeView ()
{
  // edit your windows component treeview or anything else (textbox, combobox)
}

public void timer_refresh_Elapsed(object sender, ElapsedEventArgs e)
        {
            try
            {
                this.Invoke(this.myDelegateBoundTreeView);

            }
            catch
            {
                timer_refresh.Stop();
                //timer_refresh.Enabled = false;
            }
        }
}

control.invoke

http://msdn.microsoft.com/zh-cn/library/zyzhdc6b.aspx

http://msdn.microsoft.com/zh-cn/library/system.windows.forms.control.invokerequired.aspx