check if textbox is empty c# code example

Example 1: c# check if string is empty

if (string.IsNullOrEmpty(myString)) {
   //
}

Example 2: c# check if textbox is not empty

if (String.IsNullOrEmpty(textBox1.Text))
{
    // Do something...
}

Example 3: how to check if textbox is empty in c#

string.IsNullOrWhiteSpace(textBox.Text); // returns boolean