Yet Another Select Value in a ComboBox Question

[Richard Weeks]

I have a normal RadGrid and in that grid columns like this:

<telerik:GridTemplateColumn
    HeaderText="MyColumn"
    UniqueName="MyColumn">
    <ItemTemplate>
        <asp:Label ID="MyColumnLabel" runat="server" Text='<%# Eval("MyColumn") %>'></asp:Label>
    </ItemTemplate>
    <EditItemTemplate>
        <telerik:RadComboBox
            ID="Domains"
            DataTextField="MyColumn"
            DataValueField="MyColumnID"
            Runat="server">
        </telerik:RadComboBox>
    </EditItemTemplate>
</telerik:GridTemplateColumn>

Then in the code-behind:

protected void MyGrid_OnItemDataBound(object sender, GridItemEventArgs e)
{
    if ((e.Item is GridEditableItem) && e.Item.IsInEditMode)
    {
        GridEditableItem gridEditableItem = (GridEditableItem)e.Item;

        RadComboBox myComboBox = (RadComboBox)gridEditableItem.FindControl("MyComboBox");

        this.businessData = new BusinessData();

        // Don't worry about this. It pulls data from the business layer and databinds the ComboBox.
        TelerikHelper.BindRadComboBox(myComboBox, businessdataData.Select(), false);
    }
}

Everything works fine as is. In non-edit view, the correct value is displayed and in edit view, the combobox is displayed, populated with values.

But I also want to set the selected item in the databound dropdown to the text value set in MyColumnLabel.

I must be having an off-day because I simply cannot work out how to do it :(

Can anyone enlighten me? I've been through any number of examples on the Telerik site with no luck.

Regards,
Richard

[Shinu]

Hello Richard,

After populating RadComboBox in ItemDataBound event, you can set the SelectedValue of RadComboBox to the cell value bound for 'MyColumnLabel'. Give a try with this following code snippet.

C#:

protected void RadGrid1_ItemDataBound(object sender, GridItemEventArgs e)
    {
        if (e.Item is GridEditFormItem && e.Item.IsInEditMode)
        {

            GridEditFormItem edititem = (GridEditFormItem)e.Item;
            RadComboBox dr1 = (RadComboBox)edititem.FindControl("Domains");
            //populate ComboBox
            dr1.SelectedValue = ((GridEditableItem)(edititem.ParentItem))["MyColumn"].Text;
            dr1.DataBind();
        }
   }

Regards,
Shinu.

[Richard Weeks]

Hi, thanks for your reply.

I think you have the correct idea but the code as is does not work.

The .Text value comes back as an empty string but if I browse through debug to the textbox, I can see there is a value. But the code does not find it.

Code I used:

GridEditFormItem edititem = (GridEditFormItem)e.Item;

myComboBox.SelectedValue = ((GridEditableItem)(edititem.ParentItem))["MyColumn"].Text;

Very perplexing. You would surely think getting the value of a textbox in the item template when editing would be easy...

Richard

[edit] I forgot to mention that I need to set the selected item on the combobox by matching the text and not the value property.

[Richard Weeks]

I got it!

GridEditFormItem item = (GridEditFormItem)e.Item;

Label label = (Label)item.ParentItem.FindControl("MyColumnLabel");

myComboBox.FindItemByText(label.Text).Selected = true;

Thanks for the heads-up for ParentItem, that got me on the right path.

I'm a happy man now :)

Richard