Adding validator in template column

[Digital Man]

I tried to submit this as a support ticket but it timed out so am posting here
----------------------------------------------------------------------------------------------------------

I can add validators to built in columns with no problem using the following code:

    protected void rgData_ItemCreated(object sender, GridItemEventArgs e)
    {
        if (e.Item is GridEditableItem && e.Item.IsInEditMode)
        {
            GridEditableItem item = e.Item as GridEditableItem;

            if (e.Item.OwnerTableView.DataMember == "Download")
            {
                GridTemplateColumnEditor edFile = (GridTemplateColumnEditor)item.EditManager.GetColumnEditor("DocumentFile");
                GridTextBoxColumnEditor edDescription = (GridTextBoxColumnEditor)item.EditManager.GetColumnEditor("Description");

                edDescription.TextBoxControl.ID = "txtDescription";
                edDescription.TextBoxControl.Width = Unit.Pixel(350);

However this does not seem to work with template columns. One of my template columns contains a FileUpload control. Above you can see where I try and reference it (edFile). But when I try to access the control using

((FileUpload)edFile.FindControl("fuFile")).Width = Unit.Pixel(350);
or
((FileUpload)edFile.Controls[0]).Width = Unit.Pixel(350);

I get a null reference. I was hoping I could keep all this code in the same place (ItemCreated). But do template columns need to be handled differently? Thanks.

[Yavor]

Hi Dan Duda,

One possible option in this case is to get a reference to the editForm item. Once you do this, you can reference all the controls in it, and hence add validators, and set the controltovalidate property for the relevant validators, to point to the upload, or any other control.

Kind regards,
Yavor
the Telerik team

Check out Telerik Trainer, the state of the art learning tool for Telerik products.

[David]

Can someone give an example of this? I am looking into using a template column so that I can access two controls in a template column editor, but I have not found a way to assign the ControlToValidate.

[Maria Ilieva]

Hello David,

I would suggest you to review the online demo below which presents the best approach for achieving the required validation functionality:
http://demos.telerik.com/aspnet-ajax/grid/examples/dataediting/validation/defaultcs.aspx

I hope this helps.

Regards,
Maria Ilieva
the Telerik team