Disabling Checkbox in Template Column

[Rodney]

I've looked at a number of posts here on doing this and just can't seem to get it to work. But I have inside of a GridTemplateColumn and based on the value of one of the data columns I want to set it to disabled. My data values are either "OPEN" or "CLOSED". The checkbox in question is cbMarkCompleted and the datavalue I'm checking is TaskStatusTypeCode So here is my current code:

 

<Columns>
    <telerik:GridBoundColumn UniqueName="NotificationId" DataField="NotificationId" DataType="System.Int32"
        display="false" />
    <telerik:GridTemplateColumn UniqueName="MARKCOMPLETED" ShowFilterIcon="false" HeaderText="Mark Completed"
        HeaderStyle-Width="65">
        <FilterTemplate>
            <asp:CheckBox ID="cbAll" runat="server" onclick="CheckAll(this)" />
        </FilterTemplate>
        <ItemTemplate>
            <asp:CheckBox ID="cbMarkCompleted" runat="server" ></asp:CheckBox>
        </ItemTemplate>
    </telerik:GridTemplateColumn>
    <telerik:GridBoundColumn UniqueName="NOTIFICATIONTYPE" HeaderText="Type" DataField="NOTIFICATIONTYPE" ShowFilterIcon="false"
        CurrentFilterFunction="Contains" AutoPostBackOnFilter="true" SortExpression="NOTIFICATIONTYPE" HeaderStyle-Width="80"/>
    <telerik:GridBoundColumn UniqueName="DISPLAYTEXT" HeaderText="Text" DataField="DISPLAYTEXT" ShowFilterIcon="false"
        CurrentFilterFunction="Contains" AutoPostBackOnFilter="true" SortExpression="DISPLAYTEXT" HeaderStyle-Width="340"/>
    <telerik:GridDateTimeColumn UniqueName="CREATEDON" HeaderText="Created On" DataField="CREATEDON" ShowFilterIcon="false"
        DataFormatString="{0:dd MMM yyyy}" DataType="System.DateTime" HtmlEncode="false" ItemStyle-CssClass="center"
        CurrentFilterFunction="GreaterThanOrEqualTo" AutoPostBackOnFilter="true" HeaderStyle-Width="100"/>
    <telerik:GridDateTimeColumn UniqueName="MODIFIEDON" HeaderText="Last Update" DataField="MODIFIEDON" ShowFilterIcon="false"
        DataFormatString="{0:dd MMM yyyy}" DataType="System.DateTime" HtmlEncode="false" ItemStyle-CssClass="center"
        CurrentFilterFunction="GreaterThanOrEqualTo" AutoPostBackOnFilter="true" HeaderStyle-Width="100"/>
    <telerik:GridDateTimeColumn UniqueName="DUEDATE" HeaderText="Due Date" DataField="DUEDATE" ShowFilterIcon="false"
        DataFormatString="{0:dd MMM yyyy}" DataType="System.DateTime" HtmlEncode="false" ItemStyle-CssClass="center"
        CurrentFilterFunction="GreaterThanOrEqualTo" AutoPostBackOnFilter="true" HeaderStyle-Width="100"/>
    <telerik:GridTemplateColumn UniqueName="ENTITYTYPE" ShowFilterIcon="false" DataField="ENTITYTYPE"
        SortExpression="ENTITYTYPE" HeaderText="Notification For" CurrentFilterFunction="Contains" AutoPostBackOnFilter="true"
        HeaderStyle-Width="75">
        <ItemTemplate>
            <asp:LinkButton ID="lnkNavigateToItem" runat="server" CommandName="NAVIGATE" Text='<%# Eval("EntityType") %>'
             CommandArgument='<%# Eval("ENTITYID") + "," + Eval("EntityTypeCode") %>' />
            <asp:Label ID="lblEntityType" runat="server" Text='<%# Eval("EntityType") %>'></asp:Label>
        </ItemTemplate>
    </telerik:GridTemplateColumn>
    <telerik:GridBoundColumn UniqueName="ENTITYTYPECODE" Visible="false" HeaderText="" DataField="ENTITYTYPECODE" ShowFilterIcon="false"
        CurrentFilterFunction="Contains" AutoPostBackOnFilter="true" SortExpression="ENTITYTYPECODE"/>
    <telerik:GridBoundColumn UniqueName="TaskStatusTypeCode" Visible="false" HeaderText="" DataField="TaskStatusTypeCode" ShowFilterIcon="false"
        CurrentFilterFunction="Contains" AutoPostBackOnFilter="true" SortExpression="TaskStatusTypeCode" HtmlEncode="true" />
</Columns>

[Rodney]

Forgot the C# Code, fails with is null for the Check Box:

protected void rdNotificationList_ItemCreated(object sender, GridItemEventArgs e)
{
        GridDataItem item = (GridDataItem)e.Item;
        if ((((DataRowView)e.Item.DataItem)["TaskStatusTypeCode"]).ToString() == "OPEN")
        {
            CheckBox chkBox = (CheckBox)item["cbMarkCompleted"].Controls[0];
            chkBox.Enabled = false;
        }
    }
}

[Konstantin Dikov]

Hello Rodney,

First, within the OnItemCreated and OnItemDataBound events you need to ensure that the item that fires the event is GridDataItem, before proceeding with your code. Secondly, within the OnItemCreated event, no data will be bound to the control, so you need to use the OnItemDataBound event instead.

Detailed information on how to access controls in RadGrid could be found in the following help article:

• http://docs.telerik.com/devtools/aspnet-ajax/controls/grid/rows/accessing-cells-and-rows

Hope this helps.


Regards,
Konstantin Dikov
Telerik

[Rodney]

Thank you. 

Adding the test for GridDataItem, fixed my problem.

Rodney