动态用户控件初始化回传 [英] Dynamic usercontrol postback initialization

问题描述

我有一个动态加载其它用户控件的用户控件。问题是，在回发我控制不存在。现在我的IM pression我不得不重新初始化它们之下。

I have a user control that loads other user controls dynamically. The issue is that on postback my controls don't exist. Now i'm under the impression i have to re-initialize them.

现在要做到这一点，因为他们是用户控件，使用用户控件的控件的ASCX文件都没有了空的构造被初始化。

Now to do this since they're UserControls and use the ascx file none of the UserControl's controls have been initialized in the empty constructor.

问：如何我在这个时候加载用户控件的ASCX文件

Question: How do i load the UserControl's ascx file at this time?

目前我正在努力做到这一点是这样的：

Currently i'm trying to do it like this:

for (int i = 0; i < count; i++)
{
    Control ctrl;
    if(ctrlCollectionType.Rows[i]["Type"] is UserControl)
        ctrl = LoadControl((string)ctrlCollectionType.Rows[i]["Path"]);
    else
        this.LoadControl(ctrlCollectionType[i]["Type"], null);

    ctrl.ID = i;
    pnlContent.Controls.Add(ctrl);
}

在哪里ctrlCollectionType是用户控件的类型。

Where ctrlCollectionType is the Type of the userControl.

编辑：解决方案为每乔尔Coehoorn的输入

Solution as per Joel Coehoorn's input.

推荐答案

您必须做两步骤：

• 负载控制（你的 this.LoadControl（）调用做到这一点）


• 添加加载的控制，以表单的控制集合。你没有表现出任何code，这是否。

• Load the control (your this.LoadControl() call does this)
• Add the loaded control to your form's Controls collection. You didn't show any code that does this.

此外，你需要做的的前的视图状态在页面生命周期的恢复，或者你想到事情会无法正常工作。由于ViewState是Page_Load事件触发之前恢复，这意味着你需要做它Page_Init或更早版本。

Additionally, you need to do this before viewstate is restored in the page life cycle, or things won't work as you expect. Since viewstate is restored before the Page_Load event fires, that means you need to do it on Page_Init or earlier.

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