I have been stuck for several days already. I desperately need some
help.
I am using Asp.Net 2 and VS2005. I am using a TreeView control and am
trying to get a click event from a SAME-NODE click event which isn't
supported by TreeView. So I create a custom control (inherited
control) from TreeView. But I can seem to get it work. There is no
compilation error. But when I run it, I got the following error.
Description: An error occurred during the parsing of a resource
required to service this request. Please review the following specific
parse error details and modify your source file appropriately.
Parser Error Message: Unknown server tag
'mycontrol:WebCustomControl1'.
I register it as:
<%@ Register Namespace="CustomControls" TagPrefix="mycontrol"%>
and use it in my aspx page like this:
=======================================================
<mycontrol:WebCustomControl1 id="m_LeftTree" runat="server"
OnSelectedNodeChanged="OnLeftMenuClicked"
DataSourceID="m_XmlDataSourceTreeView" NodeIndent="10" SkipLinkText=""
CssClass="minorSpace1" >
......
</mycontrol:WebCustomControl1>
============================================================
The custom control code is extremely simple. I just added from the IDE
and change the base class to TreeView, so I haven't added any
functionality. Here it is:
======================================================
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Text;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
namespace CustomControls
{
[DefaultProperty("Text")]
[ToolboxData("<{0}:WebCustomControl1 runat=server></
{0}:WebCustomControl1>")]
public class WebCustomControl1 : System.Web.UI.WebControls.TreeView
{
[Bindable(true)]
[Category("Appearance")]
[DefaultValue("")]
[Localizable(true)]
public string Text
{
get
{
String s = (String)ViewState["Text"];
return ((s == null) ? String.Empty : s);
}
set
{
ViewState["Text"] = value;
}
}
protected override void RenderContents(HtmlTextWriter output)
{
output.Write(Text);
}
}
}
