Dynamic ASP.NET controls using Infragistics
- by Emil D
So, in my asp.net webapp I need to dynamically load a custom control, based on the selected value of a dropdown list.That seems to work at first glance, but for some reason all infragistics controls that I have in my custom control appear, but won't work.I get a "Can't init [controlname]" warning in my browser.If I declare my custom control statically, this problem doesn't apprear
Here's my code:
Markup:
<%@ Control Language="C#"
AutoEventWireup="true"
CodeBehind="GenericReportGUI.ascx.cs"
Inherits="GenericReportGUI" %>
<%@ Register assembly="Infragistics35.WebUI.Misc.v8.3, Version=8.3.20083.1009,Culture=neutral, PublicKeyToken=7dd5c3163f2cd0cb"
namespace="Infragistics.WebUI.Misc"
tagprefix="igmisc" %>
<asp:UpdatePanel ID="myUpdatePanel"
runat="server"
UpdateMode="Conditional">
<ContentTemplate>
<igmisc:WebPanel ID="WebPanel1"
runat="server">
<Template>
<div>
<asp:PlaceHolder ID="Placeholder"
runat="server">
</asp:PlaceHolder>
</div>
</Template>
</igmisc:WebPanel>
</ContentTemplate>
</asp:UpdatePanel>
Code-behind:
public partial class GenericReportGUI : System.Web.UI.UserControl
{
protected void Page_Load(object sender, EventArgs e)
{
}
protected override void OnPreRender( EventArgs e )
{
base.OnPreRender(e);
loadCustomControl();
}
protected void loadCustomControl()
{
Placeholder.Controls.Clear();
string controlPath = getPath(); //getPath() returns the path to the .ascx file we need to load, based on the selected value of a dropdownlist
try
{
Control newControl = LoadControl( controlPath );
Placeholder.Controls.Add( newControl );
}
catch
{
//if the desired control cannot be loaded, display nothing
}
myUpdatePanel.Update();//Update the UpdatePanel that contains the custom control
}
}
I'm a total noob when it comes to asp.net, so any help with this issue would be greatly appreciated.
