将自定义控件添加到ASP.Net面板 [英] Add custom control to ASP.Net Panel
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问题描述
我的代码如下:
My code is as follows:
<asp:UpdatePanel runat="server" ID="upPanel1">
<ContentTemplate>
<asp:Panel ID="pnlPartners" runat="server">
</asp:Panel>
<asp:LinkButton ID="btnAddControl" OnClick="btnAddControl_Click" runat="server" Text="Add Control" />
</ContentTemplate>
</asp:UpdatePanel>
现在，当我单击AddControl按钮时，我想为此添加自己的自定义文本框控件.这是我的btnAddControl方法的代码:
Now I want to add my own custom textbox control to this when I click the AddControl button. Here is the code for my btnAddControl method:
CustomTextbox ct = new CustomTextbox();
ct.LoadControl("/Controls/CustomTextbox.ascx");
pnlPartners.Controls.Add(ct);
我没有收到任何错误，我看到更新面板执行了回发操作，但是控件从未添加?任何帮助将不胜感激！
I get no errors, I see that the update panel does a post back but the control never gets added? Any help will be greatly appreciated!
推荐答案
选中此 [ ^ ]
及以下代码
Hi,
Check this[^]
and below code
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="SampleMenu1.aspx.cs" Inherits="SampleMenuPage1" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
<title>Sample Menu</title>
</head>
<body>
<form id="form1" runat="server">
<asp:Menu ID="Menu1" runat="server" OnMenuItemClick="Menu1_MenuItemClick">
<Items>
<asp:MenuItem Text="File">
<asp:MenuItem Text="Load Control1"></asp:MenuItem>
<asp:MenuItem Text="Load Control2"></asp:MenuItem>
<asp:MenuItem Text="Load Control3"></asp:MenuItem>
</asp:MenuItem>
</Items>
</asp:Menu>
<br />
<br />
<asp:ScriptManager ID="ScriptManager1" runat="server"></asp:ScriptManager>
<asp:UpdatePanel ID="UpdatePanel1" runat="server" UpdateMode="Conditional">
<ContentTemplate>
<asp:PlaceHolder ID="PlaceHolder1" runat="server"></asp:PlaceHolder>
</ContentTemplate>
<Triggers>
<asp:AsyncPostBackTrigger ControlID="Menu1" />
</Triggers>
</asp:UpdatePanel>
</form>
</body>
</html>
using System;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
public partial class PlainSampleMenuPage : System.Web.UI.Page
{
private const string BASE_PATH = "~/DynamicControlLoading/";
private string LastLoadedControl
{
get
{
return ViewState["LastLoaded"] as string;
}
set
{
ViewState["LastLoaded"] = value;
}
}
private void LoadUserControl()
{
string controlPath = LastLoadedControl;
if (!string.IsNullOrEmpty(controlPath))
{
PlaceHolder1.Controls.Clear();
UserControl uc = (UserControl)LoadControl(controlPath);
PlaceHolder1.Controls.Add(uc);
}
}
protected void Page_Load(object sender, EventArgs e)
{
LoadUserControl();
}
protected void Menu1_MenuItemClick(object sender, MenuEventArgs e)
{
MenuItem menu = e.Item;
string controlPath = string.Empty;
switch (menu.Text)
{
case "Load Control2":
controlPath = BASE_PATH + "SampleControl2.ascx";
break;
case "Load Control3":
controlPath = BASE_PATH + "SampleControl3.ascx";
break;
default:
controlPath = BASE_PATH + "SampleControl1.ascx";
break;
}
LastLoadedControl = controlPath;
LoadUserControl();
}
}
我在此处找到了它
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