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Checkbox problem inside RadWindow

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Håkan asked on 07 Jun 2010, 03:40 PM
I have a RadGrid with a checkbox inside a template column. When I place the grid inside a RadWindow and the checkbox is marked as checked in codebehind it don't become checked when displayed. It works fine when it's not placed inside a RadWindow. Anyone has any suggestions?
Example code below.


<asp:Button ID="Button1" runat="server" Text="Open" OnClick="Button1_Click" />      
<telerik:RadWindow ID="RadWindow1" runat="server">  
        <telerik:RadGrid id="RadGrid1" runat="server">  
            <MasterTableView AutoGenerateColumns="false">  
                            <asp:CheckBox id="chkSelect" runat="server" /> 
                    <telerik:GridBoundColumn DataField="Name" /> 
protected void Button1_Click(object sender, EventArgs e)  
    List<object> list = new List<object>();  
    list.Add(new { ID = 1, Name = "Item A" });  
    list.Add(new { ID = 2, Name = "Item B" });  
    list.Add(new { ID = 3, Name = "Item C" });  
    RadGrid1.DataSource = list;  
    ((CheckBox)RadGrid1.Items[1].FindControl("chkSelect")).Checked = true//Select Item B  
    RadWindow1.VisibleOnPageLoad = true;  

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Svetlina Anati
Telerik team
answered on 10 Jun 2010, 02:32 PM
Hi Håkan,

I already answered your support thread and for your convenience and for others who might encounter the same problem I pasted it below:

Hello Andreas,

Thank you for the provided demo, I examined it and I was able to reproduce the problem. It comes from the fact that the RadWindow when used with ContentTemplate databinds its children. This being said, in order to solve the problems please do the following:

1) Remove the explicit call to DataBind() for the combo and the grid - simply leave the datasource as shown below:

RadGrid1.DataSource = list;
RadComboBox1.DataSource = list;
RadComboBox1.DataTextField = "Name";
RadComboBox1.DataValueField = "ID";
RadComboBox1.AppendDataBoundItems = true;
// Insert choose item
RadComboBox1.Items.Insert(0, new Telerik.Web.UI.RadComboBoxItem("Choose", "-1"));
RadWindow1.VisibleOnPageLoad = true;
2) Move the code which selects the checkbox to the DataBound event of the grid as shown below:

protected void RadGrid1_DataBound(object sender, EventArgs e)
    if (RadGrid1.Items.Count > 0)
        //// Select Item B checkbox
        ((CheckBox)RadGrid1.Items[1].FindControl("chkSelect")).Checked = true;

I hope that my reply is helpful, let me know how it goes.

Sincerely yours,
the Telerik team

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Svetlina Anati
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