本文介绍了UserControl 的事件处理程序未触发的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
I dynamically load a UserControl into a View that's in a MultiView control. Although the UserControl adds an event handler, the event never fires.
What am I missing here? Thanks!
Containing ASPX page:
protected override void OnPreRender(EventArgs e)
{
if (MultiView1.ActiveViewIndex == 2) //If the tab is selected, load control
{
Control Presenter = LoadControl("Presenter.ascx");
(MultiView1.ActiveViewIndex.Views[2].Controls.Add(Presenter);
}
base.OnPreRender(e);
}
Presenter.ascx.cs
override protected void OnInit(EventArgs e)
{
Retry.Click += this.Retry_Click; //This is a .Net 2.0 project
base.OnInit(e);
}
protected void Retry_Click(object sender, EventArgs e)
{
//This never fires
}
解决方案
I am thinking it is not firing because you are loading the control in your page's prerender event. Upon postback, the control is being lost because there is no view state for it. Therefore there is no control to fire its event. Try to load the control in the page's init event. Let us know what happens!
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