For all the Devex Components, you can use ControlStyle > CssClass property to apply your custom CSS class (Example 1 and 2) or you can do it with parameter (if it is allowed – as in Example 3). Here is 3 examples for MVC: @Html.DevExpress().SpinEditFor(m => m.Books.Rating, settings => { settings.Properties.SpinButtons.ShowIncrementButtons = true; settings.Properties.Increment = […]
The issue occurs in Batch Edit Mode, because in this mode an empty invisible row is created and used for further grid editing. Since the Eval method returns a value type of an object, your attempt to call the ToString() method to the null value can lead to an exception. If you remove this conversion and use <%# […]
If you want to confirm before process with ASPxButton in Devexpress, then you can try the code below:
DevExpress.Web.ASPxClasses.ASPxWebControl.RedirectOnCallback(“the_redirect_page.aspx”);