Programmatically adding RequiredFieldValidator

[Steve Wolfe]

I have been trying to programmatically add a RequiredFieldValidator to an auto-generated GridDropDownColumn, but have been unsuccessful.  

Has anyone tried doing this, and if so could you provider any pointers.

I have 2 use cases:

1. Dropdown is pre-populated with values.  First being a "Please select a choice" item.   By not setting a selected value this is the default value, and I want to verify that a different choice has been made.
2. Dropdown list has no items in it, and I do not want to allow an insert/update to happen in this case.

Thanks in advanced for any help.

-Steve

[Shinu]

Hello Steve,

Here is the code that I tried to add RequireFieldValidator for GridDropDownColumn. Give a try with this.
CS:

    protected void RadGrid1_ItemCreated(object sender, GridItemEventArgs e)
    {
        if (e.Item is GridEditableItem && e.Item.IsInEditMode)
        {
            GridEditableItem item = e.Item as GridEditableItem;
            GridDropDownColumnEditor editor = (GridDropDownColumnEditor)item.EditManager.GetColumnEditor("Dropdown");
            TableCell cell = (TableCell)editor.ContainerControl;

            RequiredFieldValidator validator = new RequiredFieldValidator();
            editor.ContainerControl.ID = "ID_for_validation";
            validator.ControlToValidate = editor.ContainerControl.Controls[0].ID;
            validator.InitialValue = "Please Select a Choice";
            validator.ErrorMessage = "*";
            cell.Controls.Add(validator);
        }
    }

Also checkout the following help documentation for more information on this:
Validation

-Shinu.

[Steve Wolfe]

Shinu,

Thanks for the reply.  Yes, this works.   You have to use the "Text" of the selected item.  Each item in the dropdown list has 2 "values", the text and the value.  I was misinterpreting InitialValue on the Validator as the "value" of the dropdown list item.

-Steve

[misha]

Thanks for pointing that out.. I too was making the same mistake.