telerik.web.ui.gridboundcolumn shows error

[Sucheta Patil]

Hi guys,
I had a RADScript manager then I add a Rad grid to my form.
Below is the code snippet.

<%@ Control Language="C#" AutoEventWireup="true" CodeBehind="WebUserControl1.ascx.cs" Inherits="WebUserControl1" %>   <% @ Register Assembly="Telerik.Web.UI" Namespace="Telerik.Web.UI" TagPrefix="telerik" %>

<asp:SqlDataSource ID="SqlDataSource1" runat="server"
    ConnectionString="ConnectionString1"
    ProviderName="System.Data.SqlClient" SelectCommand="SELECT * FROM [tblCentre]">
</asp:SqlDataSource>


<telerik:RadGrid ID="RadGrid1" runat="server" DataSourceID="SqlDataSource1"
    GridLines="None">
<MasterTableView AutoGenerateColumns="False" DataKeyNames="ID"
        DataSourceID="SqlDataSource1">
<RowIndicatorColumn>
<HeaderStyle Width="20px"></HeaderStyle>
</RowIndicatorColumn>

<ExpandCollapseColumn>
<HeaderStyle Width="20px"></HeaderStyle>
</ExpandCollapseColumn>
    <Columns>
        <telerik.web.ui.gridboundcolumn datafield="ID" datatype="System.Int32"
            headertext="ID" readonly="True" sortexpression="ID" uniquename="ID"></telerik.web.ui.gridboundcolumn>
        <telerik.web.ui.gridboundcolumn datafield="Centre" headertext="Centre"
            sortexpression="Centre" uniquename="Centre"></telerik.web.ui.gridboundcolumn>
    </Columns>
</MasterTableView>
</telerik:RadGrid>

Every time I have to replace
telerik.web.ui.gridboundcolumn by Telerik:GridBoundColumn and the code works else it throws error as 
*******************************
Telerik.Web.UI.GridColumnCollection must have items of type 'Telerik.Web.UI.GridColumn'. 'telerik.web.ui.gridboundcolumn' is of type 'System.Web.UI.HtmlControls.HtmlGenericControl'.
*******************************
IS there any way I dont have to keep changing this everytime.?
Like I have included
using Telerik.Web.UI  in ascx.cs file and Also there is a reference shown in ascx file too.
Thanks in advance..

[Tsvetoslav]

Hi Sucheta,

It is incorrect ot use teleri.web.ui.gridboundcolumn as you have registered "telerik" as the tagprefix for the objects in the Teleri.Web.UI assembly, Teleri.Web.UI namespace:

<%@ Register Assembly="Telerik.Web.UI" Namespace="Telerik.Web.UI" TagPrefix="telerik" %>

All the best,
Tsvetoslav
the Telerik team

[Sucheta Patil]

Hello,
When I drag the Radgrid and I assign the datasource then I get this in design view.
I have stated that I have to replace Telerik.Web.UI to Telerik.GridBoundCoulmn.
I am not manually adding anything.

Any help is appreciated!!!

[Sucheta Patil]

Hello
If you see my code I have already added the reference you have said.

Any other answer please!!!!

[Tsvetoslav]

Hi Sucheta,

Your page directive should be as follows:

<%@ Register Assembly="Telerik.Web.UI" Namespace="Telerik.Web.UI" TagPrefix="telerik" %>

and the mark-up for the button column:

<telerik:GridButtonColumn ...... />

All the best,
Tsvetoslav
the Telerik team

[TechSavvySam]

I'm using Version 2010.2.826.35 and I found this solution to be insufficient to fix the problems.  Telerik support got me on the right track.  I found this in the web.config did not work correctly (note that this is what the Telerik template puts in the web.config):

<add tagPrefix="telerik" namespace="Telerik.Web.UI" assembly="Telerik.Web.UI"/>

You MUST instead FULLY qualify the assembly:

<add tagPrefix="telerik" namespace="Telerik.Web.UI" assembly="Telerik.Web.UI,
   Version=2010.2.826.35, Culture=neutral, PublicKeyToken=121FAE78165BA3D4"/>

now when I make any additions to the page, the telerik controls are prefixed with "<telerik:" instead of "<telerik.web.ui."

here's the other forum thread that applies to this:

               http://www.telerik.com/community/forums/aspnet-ajax/grid/driving-me-nuts.aspx

and love the subject on that thread--I feel their pain man!

[Chen]

You are officially my hero of the week.
This was such a waste of time chasing this issue.

Telerik support - you must find a way to publish workarounds  to your bugs in a more approachable way.
People are wasting so much time on this stuff.

[Sebastian]

Point taken, guys - appreciate your feedback. We will definitely look into other ways to make important information like this one easily accessible for the Telerik Community members and clients - using sticky forum posts or our Public Issue Tracking System (PITS).

Kind regards,
Sebastian
the Telerik team