While working with GridView in ASP.NET, most of the time we used HyperlinkField column to navigate from one page to different page with some value as argument. This tip explained how can we pass multiple parameter with HyperLinkField in GridView.
When we bind some data source with GridView which contains some fields with
NULL value, ASP.NET renders them as Blank. This tips talks about how to put custom message or icon rather a blank text.
Most of the time we used simple text messages for error notifications when ASP.NET validator control fails the validation. But the interesting things with ASP.NET validation controls is instead of simple text we can display images as error notification. Not only images we can embed sounds or we can display some html format text as well.
To achieve instead of setting
ErrorMessage property of an Validation control, you need to set
Text Property with proper HTML content.