ASP.NET - 在 RenderContent 调用中将事件处理程序添加到 Repeater 内的 LinkButton

发布于 2024-07-05 18:56:45 字数 1037 浏览 7 评论 0 原文

我有一个加载自定义用户控件的 Sharepoint WebPart。用户控件包含一个 Repeater，而 Repeater 又包含多个 LinkButton。

在 Web 部件的 RenderContent 调用中，我有一些代码来添加事件处理程序：

        ArrayList nextPages = new ArrayList();
        //populate nextPages ....
        AfterPageRepeater.DataSource = nextPages;
        AfterPageRepeater.DataBind();

        foreach (Control oRepeaterControl in AfterPageRepeater.Controls)
        {
            if (oRepeaterControl is RepeaterItem)
            {
                if (oRepeaterControl.HasControls())
                {
                    foreach (Control oControl in oRepeaterControl.Controls)
                    {
                        if (oControl is LinkButton)
                        {
                            ((LinkButton)oControl).Click += new EventHandler(PageNavigateButton_Click);
                        }
                    }
                }
            }
        }

但是，函数 PageNavigateButton_Click 从未被调用。然而，我可以看到它被添加为调试器中的事件处理程序。

有任何想法吗？我很困惑如何做到这一点。

原文

I've got a Sharepoint WebPart which loads a custom User Control. The user control contains a Repeater which in turn contains several LinkButtons.

In the RenderContent call in the Webpart I've got some code to add event handlers:

        ArrayList nextPages = new ArrayList();
        //populate nextPages ....
        AfterPageRepeater.DataSource = nextPages;
        AfterPageRepeater.DataBind();

        foreach (Control oRepeaterControl in AfterPageRepeater.Controls)
        {
            if (oRepeaterControl is RepeaterItem)
            {
                if (oRepeaterControl.HasControls())
                {
                    foreach (Control oControl in oRepeaterControl.Controls)
                    {
                        if (oControl is LinkButton)
                        {
                            ((LinkButton)oControl).Click += new EventHandler(PageNavigateButton_Click);
                        }
                    }
                }
            }
        }

The function PageNavigateButton_Click is never called however. I can see it being added as an event handler in the debugger however.

Any ideas? I'm stumped how to do this.

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半葬歌 2024-07-12 18:56:45

当调用 RenderContent() 时，框架已调用所有注册的事件处理程序。您需要在较早的方法中添加事件处理程序，例如 OnLoad()：

protected override void OnLoad(EventArge e)
 { base.OnLoad(e);
   EnsureChildControls();

   var linkButtons = from c in AfterPageRepeater.Controls
                                                .OfType<RepeaterItem>()
                     where c.HasControls()
                     select c into ris
                        from lb in ris.OfType<LinkButton>()
                        select lb;

   foreach(var linkButton in linkButtons)
    { linkButton.Click += PageNavigateButton_Click
    }                          
 }

By the time RenderContent() is called, all the registered event handlers have been called by the framework. You need to add the event handlers in an earlier method, like OnLoad():

protected override void OnLoad(EventArge e)
 { base.OnLoad(e);
   EnsureChildControls();

   var linkButtons = from c in AfterPageRepeater.Controls
                                                .OfType<RepeaterItem>()
                     where c.HasControls()
                     select c into ris
                        from lb in ris.OfType<LinkButton>()
                        select lb;

   foreach(var linkButton in linkButtons)
    { linkButton.Click += PageNavigateButton_Click
    }                          
 }

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