CODEWITHSUNDEEP
c#asp.netclass
namco
namco

Reputation: 6338

Getting Error when trying to extend ASP.NET Panel control

I am trying to extend System.Web.UI.WebControl.Panel control. Below is my .cs code. 

namespace XControls
{
    public class VisibilityChangedEventArgs : EventArgs
    {
        public bool Visible { get; private set; }
        public VisibilityChangedEventArgs(bool visibility)
        {
            Visible = visibility;
        }
    }

public class XPanel : Panel
{
    public EventHandler VisibleChanged;

    public override bool Visible
    {
        get
        {
            return base.Visible;
        }

        set
        {
            base.Visible = value;
            OnVisibleChanged();
        }
    }

    protected void OnVisibleChanged()
    {
        if (VisibleChanged != null)
            VisibleChanged(this, new VisibilityChangedEventArgs(Visible));
    }
    }
}

And in default.aspx file first I register my XPanel. 

<%@ Register TagPrefix="xc" Namespace="XControls" %>

And down in code try to use like this. 

<xc:XPanel runat="server" id="xp">
            Hello XPanel
 </xc:XPanel>

But When I try to run this in browser I get an error:
Server Error in '/' Application.
Parser 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 'xc:XPanel'.

So what is the problem? What I am doing wrong?

Upvotes: 0

Views: 57

Answers (1)

Anwar Ul-haq
Anwar Ul-haq

Reputation: 1881

You need to add assembly name as well when you register your control. 

   <%@ Register TagPrefix="xc" Namespace="WebApplication1" Assembly="WebApplication1" %>

Upvotes: 3

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