To show or hide a variable if null in AngularJs, you can use the snippet below. Sample AngularJs or

You can use the IsNull Extension method by using the snippet below. Sample C# Sample VB.NET As always, this extension…

To check if String is Null or Empty in XSL you can use the following snippet. Sample XSL

This snippet will give you the IsNullOrEmpty function for PHP. Sample PHP

This snippet will give you the IsEmpty function for Javascript. Sample Javascript

IsNull extension method for C# and VB.NET. Simple but very usefull! Sample C# Sample VB.NET Usage (c#)