如何从服务器代码添加Control到ContentPlaceHolder？ [英] How to add a Control to ContentPlaceHolder from server code?

问题描述

我的意思是，我想做类似的事情：ContentPlaceHolder1.Controls.Add（Panel1），但我不想将Panel1放在aspx文件中，因为我想从抽象页面添加控件。

I mean, I want to do something like that: ContentPlaceHolder1.Controls.Add(Panel1), but I don't want to put Panel1 in aspx file because I want to add Controls from a abstract page.

推荐答案

假设我理解你的问题，你似乎想要在/ file后面的代码中动态地向一个contentplaceholder添加一个面板控件。

Assuming I understand you question it appears you want to add a panel control to a contentplaceholder dynamically in the code behind/file.

Panel pnl = new Panel();
pnl.Controls.Add(new TextBox()); // add textbox to panel can be whatever control you want
ContentPlaceHolder cph = (ContentPlaceHolder)this.Master.FindControl("MainContent");
cph.Controls.Add(pnl);

或者：

Or alternatively:

Panel pnl2 = new Panel();
pnl2.Controls.Add(new TextBox()); // add textbox to panel can be whatever control you want
ContentPlaceHolder cph = (ContentPlaceHolder)this.Master.FindControl("MainContent").Controls.Add(pnl2);

ASPX页码：

ASPX Page Code:

<asp:content id="HeaderContent" runat="server" contentplaceholderid="HeadContent" xmlns:asp="#unknown">
</asp:content>
<asp:content id="BodyContent" runat="server" contentplaceholderid="MainContent" xmlns:asp="#unknown">
    <p>Page content here</p>
</asp:content>

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