How many elements of array are not null?

An array is defined of assumed elements like I have array like Stri开发者_Python百科ng[] strArray = new String[50];.

Now from 50 elements only some elements are assigned and remaining are left null then I want the number of assigned elements.

Like here only 30 elements are assigned then I want that figure.

You can use Enumerable.Count:

string[] strArray = new string[50];
...
int result = strArray.Count(s => s != null);

This extension method iterates the array and counts the number of elements the specified predicate applies to.

Using LINQ you can try

int count = strArray.Count(x => x != null);

Use LINQ:

int i = (from s in strArray where !string.IsNullOrEmpty(s) select s).Count();