C#跨线程更改用户界面

这里举一个更改Text属性的例子：

1.为了实现更改任意一个控件，这里我定义了一个结构体

public struct SetTextParam
{
   public Control CtrlObject;
   public string strText;
}

2.定义一个委托

delegate void SetTextCallback(SetTextParam stParam);

3.编写改变Text属性的函数

private void SetText(SetTextParam stParam)
{
    if (stParam.CtrlObject.InvokeRequired)
        stParam.CtrlObject.Invoke(new SetTextCallback(SetText), new object[] { stParam });
    else
        stParam.CtrlObject.Text = stParam.strText;
}

重载一个，我更喜欢这样的方式：

private void SetText(Control CtrlObject,string strText)
{
    if (CtrlObject.InvokeRequired)
    {
        SetTextParam stParam;
        stParam.CtrlObject = CtrlObject;
        stParam.strText = strText;
        CtrlObject.Invoke(new SetTextCallback(SetText), new object[] { stParam });
    }
    else
        CtrlObject.Text = strText;
}

4.创建线程函数

private void ThreadProcSafe(object objParam)
{
    SetText((SetTextParam)objParam);
}

 

5.现在可以在别的线程里面改变Control的界面了,如在button1_click中添加如下代码：

SetTextParam stParam;
stParam.CtrlObject = button1;
stParam.strText = "New Button";
Thread newThread = new Thread(new ParameterizedThreadStart(ThreadProcSafe));
newThread.Priority = ThreadPriority.AboveNormal;
newThread.Start(stParam);