我有一个更新面板中的母版：

 ＆LT; ASP：UpdatePanel的ID =的UpdatePanel=服务器ChildrenAsTriggers =真的EnableViewState =假
                的UpdateMode =有条件＆GT;
                ＆LT;的ContentTemplate＆GT;
                    ＆LT; D​​IV ID =日程地址搜索Maincontent＆GT;
                        ＆LT; ASP：的ContentPlaceHolder ID =ContentPlaceHolder1=服务器＆GT;
                        ＆LT; / ASP：的ContentPlaceHolder＆GT;
                    ＆LT; / DIV＆GT;
                ＆LT; /的ContentTemplate＆GT;
                ＆LT;触发器＆GT;
              ＆LT; /触发器＆GT;
            ＆LT; / ASP：UpdatePanel的＆GT;
 

然后，我有Default.aspx页面，它使用了母版文件：

 ＆LT; ASP：内容ID =内容1=服务器ContentPlaceHolderID =ContentPlaceHolder1＆GT;
＆LT; ASP：占位符ID =plhCurrentItem=服务器＆GT;＆LT; / ASP：占位符＆GT;
＆LT; / ASP：内容＆GT;
 

我编程方式加载用户控件与ID plhCurrentItem的占位符。

现在的问题是，当我点击在该用户的按钮时，没有任何事件触发。用户控件刚刚消失，在UpdatePanel是空白。

我是什么做错了吗？

更新

code用来添加用户控件。该LoadControls方法是从Page_Load事件调用。

 控制ctlCurrentItem = NULL;

公共字符串currentControl
{
    {返回（（串）会议[currentControl]）; }
    集合{会议[currentControl] =值; }
}



公共无效LoadControls（）
{
    开关（currentControl）
    {
        情况下家庭：
            ctlCurrentItem = Page.LoadControl（〜/页/ Home.ascx）;
            ctlCurrentItem.ID =家;
            打破;
        案简历：
            ctlCurrentItem = Page.LoadControl（〜/页/ Resume.ascx）;
            ctlCurrentItem.ID =恢复;
            打破;
        案工程：
            ctlCurrentItem = Page.LoadControl（〜/页/ Projects.ascx）;
            ctlCurrentItem.ID =项目;
            打破;
        案联系：
            ctlCurrentItem = Page.LoadControl（〜/页/ Contact.ascx）;
            ctlCurrentItem.ID =联系;
            打破;
        默认：
            返回;

    }
    plhCurrentItem.Controls.Clear（）;
    plhCurrentItem.Controls.Add（ctlCurrentItem）;


}
 

解决方案

将LoadControls请致电的页面生命周期：

使用此事件的以下内容：

检查IsPostBack属性，以确定这是否是第一次页面正在处理中。 创建或重新创建动态控件。 设置一个母版页动态。 主题属性动态设置。 在读取或设置配置文件属性值。

I have a masterpage with an update panel:

<asp:UpdatePanel ID="UpdatePanel" runat="server" ChildrenAsTriggers="true" EnableViewState="False"
                UpdateMode="Conditional">
                <ContentTemplate>
                    <div id="mainContent">
                        <asp:ContentPlaceHolder ID="ContentPlaceHolder1" runat="server">
                        </asp:ContentPlaceHolder>
                    </div>
                </ContentTemplate>
                <Triggers>
              </Triggers>
            </asp:UpdatePanel>

Then I have Default.aspx page which uses the masterpage file:

<asp:Content ID="Content1" runat="server" ContentPlaceHolderID="ContentPlaceHolder1">
<asp:PlaceHolder ID="plhCurrentItem" runat="server"></asp:PlaceHolder>
</asp:Content>

I programmatically load usercontrols into the placeholder with id plhCurrentItem.

The problem is when I click a button in the usercontrol, no event fires. The usercontrol just disappears and the updatepanel is left blank.

What am I doing wrong?

Update

Code used to add usercontrols. The LoadControls method is called from the Page_load event.

 Control ctlCurrentItem = null;

public string currentControl
{
    get { return ((string)Session["currentControl"]); }
    set { Session["currentControl"] = value; }
}



public void LoadControls()
{
    switch (currentControl)
    {
        case "Home":
            ctlCurrentItem = Page.LoadControl("~/pages/Home.ascx");
            ctlCurrentItem.ID = "Home";
            break;
        case "Resume":
            ctlCurrentItem = Page.LoadControl("~/pages/Resume.ascx");
            ctlCurrentItem.ID = "Resume";
            break;
        case "Projects":
            ctlCurrentItem = Page.LoadControl("~/pages/Projects.ascx");
            ctlCurrentItem.ID = "Projects";
            break;
        case "Contact":
            ctlCurrentItem = Page.LoadControl("~/pages/Contact.ascx");
            ctlCurrentItem.ID = "Contact";
            break;
        default:
            return;

    }
    plhCurrentItem.Controls.Clear();
    plhCurrentItem.Controls.Add(ctlCurrentItem);


}

解决方案

Put LoadControls call in the OnPreInt event from the page life-cycle:

Use this event for the following:

Check the IsPostBack property to determine whether this is the first time the page is being processed. Create or re-create dynamic controls. Set a master page dynamically. Set the Theme property dynamically. Read or set profile property values.