In cross-thread WinForm control operation

When WinForm program will encounter case by a background thread interface directly in a background thread execution method of direct access controls will complain, this time we should use indirect cross-thread operation controls. Here are two implementations.

 

1, using the delegate defined manner

private delegate void SetTextBoxValueDelegate(string value);
private void SetTextBoxValue(string value)
{
    if (this.txtInfo.InvokeRequired)//判断是否跨线程请求
    {
        SetTextBoxValueDelegate myDelegate = delegate(string text) { txtInfo.Text = text; };
        txtInfo.Invoke(myDelegate, value);
    }
    else
    {
        txtInfo.Text = value;
    }
}

 

2, using Action <T> manner (recommended)

private void SetTextBoxValue(string value)
{
    Action<string> setValueAction = text => txtInfo.Text = text;//Action<T>本身就是delegate类型，省掉了delegate的定义
    if (this.txtInfo.InvokeRequired)
    {
        txtInfo.Invoke(setValueAction, value);
    }
    else
    {
        setValueAction(value);
    }
}

 

Reproduced in: https: //www.cnblogs.com/conexpress/p/WinForm_Thread_Operate_Control.html