Iterate over rows/checkboxes in a RadGrid - asp.net

Question

I have a Telerik RadGrid with a GridTemplateColumn that contains a checkbox, as follows:
<telerik:GridTemplateColumn HeaderText="MINE" UniqueName="MyTemplateColumn">
<ItemTemplate>
<asp:CheckBox id="MyCheckBox" runat="server"></asp:CheckBox>
</ItemTemplate>
</telerik:GridTemplateColumn>
I want to set the box to be "checked" based on a value read from the database. I could handle the ItemDataBound event and read the database when each row is bound, but that results in n lookups. Instead, I want to handle DataBound, and then set all the values at once. So, in that method, I want code like this:
// read all values from database first, then...
foreach(var chkbox in MyRadGrid.MasterTableView.Columns.FindByUniqueName("MyTemplateColumn").FindControl("MyCheckBox")) {
chkbox.Checked = oneValue;
}
That doesn't work, because FindControl isn't a method of GridColumn, and it won't generate an iterable list of the checkboxes. What is the correct way to iterate through the checkboxes in the template column? Thanks!

Answer 1

Telerik got back to me on their forums with the answer, as follows:
foreach (GridDataItem item in MyRadGrid.MasterTableView.Items)
{
CheckBox chk = (CheckBox)item.FindControl("MyCheckBox");
// Set the value here
}
Hope this is useful for someone!

Answer 2

I am having the same issue.. this was how I did it..
'Created a local hashtable to use now and otherwise
Private _GroupMembers As New Hashtable
'Loaded it up on page load
Private Function GetMembers() As Boolean
Try
Dim da As New DataAccess
Dim ht As New Hashtable
Dim i As Int16 = 0
ht.Add("CAC", Session("cac"))
ht.Add("GroupID", _GroupID)
If da.GetData("rap_spGetGroupMemberList", ht) = True Then
If da.SQLDataRows.HasRows Then
While da.SQLDataRows.Read()
i = i + 1
_GroupMembers.Add(i, da.SQLDataRows("UserID"))
End While
End If
da.SQLDataRows.Dispose()
End If
da = Nothing
Catch ex As Exception
Console.Write(ex.Message)
End Try
End Function
'Check for contains
Protected Sub RadGrid2_ItemDataBound(ByVal sender As Object, ByVal e As Telerik.Web.UI.GridItemEventArgs) Handles RadGrid2.ItemDataBound
Try
If e.Item.IsDataBound Then
If Not e.Item.DataItem("UserID") Is Nothing Then
If Not IsDBNull(e.Item.DataItem("UserID")) Then
Dim UserID As Long = e.Item.DataItem("UserID")
If _GroupMembers.ContainsValue(UserID) Then
e.Item.Selected = True
End If
End If
End If
End If
Catch ex As Exception
Console.Write(ex.Message)
End Try
End Sub