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Empty String Check (VB.Net and C++/CLI Cross Reference Guide)

By Mike Prestwood

VB.Net versus C++/CLI: A side by side comparison between VB.Net and C++/CLI.

 
Operators
 

A language symbol used for assignment, comparison, computational, or as a logical.

Empty String Check

[Other Languages] 

Languages Focus

An empty string is a zero length string, a string that is equal to null (""), or not assigned. In some languages, you can check if a string is empty by comparing it to an empty string (""). Some languages distinguish between nil and null ("") so checking if the length is 0 is easier.

VB.Net:   String.IsNullOrEmpty

In .Net, a string can be null or empty. The .Net framework offers a static method in the string class: String.IsNullOrEmpty to check if a string is null or empty.

Syntax Example:  
Dim s As String 
  
's = "" 'Uncomment to test 2nd case.
  
If String.IsNullOrEmpty(s) Then
  MessageBox.Show("hello")
End If
C++/CLI:   String.IsNullOrEmpty

The .Net framework offers a static method in the string class: String.IsNullOrEmpty.

Syntax Example:
String^ s;
  
//s = ""; //Uncomment to test 2nd case.
  
if (String::IsNullOrEmpty(s))
{
  MessageBox::Show("empty string");
}












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