asp.net防止重复提交数据

protected void Page_Load(object sender, EventArgs e)
...{
this.btnOK.Attributes.Add("onclick", ClientScript.GetPostBackEventReference(btnOK, "Click") + ";this.disabled=true; this.value='提交中...';");
}
//按钮处理方法
protected void btnOK_Click(object sender, EventArgs e)
...{
System.Threading.Thread.Sleep(2000);
ClientScript.RegisterStartupScript(GetType(), "btnCommit", "alert('提交成功!!!');", true);
}