RadGrid GridDropDownColumn validations

[Rokk]

Hi,

 I'm quite new with asp and telerik components, so I need some help to figure this out:

 i'm trying to validate GridDropDownColumns that hold Combobox's and check is text area of combobox filled with value from dropdown.

 Now my problem is when I try to add custom validator in cs code side, it doesn't fire serverside validation. I don't want to add templatecollums to my grid if it's not necessary.

 in itemDataBound:

 

if (e.Item is GridEditableItem && e.Item.IsInEditMode)
{

            GridEditableItem item = e.Item as GridEditableItem;

            if(item["content"].Controls[0] is RadComboBox)
            {

                GridDropDownListColumnEditor editor = item.EditManager.GetColumnEditor("content") as GridDropDownListColumnEditor;

                TableCell cell = (TableCell)editor.ComboBoxControl.Parent;

                   CustomValidator validator = new CustomValidator();

                validator.ServerValidate += new ServerValidateEventHandler(comboboxValidations_ServerValidate);
                validator.ValidationGroup = "comboGroup";
                validator.ErrorMessage = "!";
                validator.ValidateEmptyText = true;

                validator.ControlToValidate = editor.ComboBoxControl.ID;
                cell.Controls.Add(validator);

            }
}

[Viktor Tachev]

Hi,

The logic you are using to add CustomValidator to the column is correct. However, it should be implemented in the ItemCreated event handler of RadGrid.  

Also, I noticed that the ValidationGroup property is set for the CustomValidator. Note that in order to trigger validation the control that triggers postback (e.g. a Button) should have the same ValidationGroup. Alternatively, you can remove the ValidationGroup property.

In case you would like additional information on adding validator controls to a grid column you would find the following article interesting.

• http://www.telerik.com/help/aspnet-ajax/grid-validation.html

Regards,
Viktor Tachev
Telerik

[Rokk]

Thanks Viktor.

I finally got it working with your instructions.