C# in VS2005: what is the best way to check if a string is empty?

Question

What is the best way to check if a string is empty in C# in VS2005?

Answer 1

There's the builtin String.IsNullOrEmpty which I'd use. It's described here.

Answer 2

try this one:

if (string.IsNullOrEmpty(YourStringVariable))
{
    //TO Do
}

Answer 3

The string.IsNullOrEmpty() method on the string class itself.

You could use

string.Length == 0

but that will except if the string is null.

Answer 4

As suggested above you can use String.IsNullOrEmpty, but that will not work if you also want to check for strings with only spaces (some users place a space when a field is required). In that case you can use:

if(String.IsNullOrEmpty(str) || str.Trim().Length == 0) {
  // String was empty or whitespaced
}

Answer 5

C# 4 has the String.IsNullOrWhiteSpace() method which will handle cases where your string is made up of whitespace ony.

Answer 6

ofc

bool isStringEmpty = string.IsNullOrEmpty("yourString");