How to Create an Email Validation TextBox in C#.

Submitted by janobe on Thursday, May 9, 2019 - 20:41.
In this tutorial, I will teach you how to create an email validation textbox using c#. This method has the ability to verify the correct email format in a textbox. This is very helpful when you are dealing with the registration form. See the procedure below to see how it works.

Creating Application

Step 1

Open Microsoft Visual Studio 2015 and create a new windows form application for c#. ps1

Step 2

Do the form just like shown below. ps2

Step 3

Press F7 to open the code editor. In the code editor , add a namespace to access regular expression libraries.
  1.  
  2. using System.Text.RegularExpressions;

Step 4

Create a method for an email validation.
  1.  
  2.         private static Regex email_validation()
  3.         {
  4.             string pattern = @"^(?!\.)(""([^""\r\\]|\\[""\r\\])*""|"
  5.                 + @"([-a-z0-9!#$%&'*+/=?^_`{|}~]|(?<!\.)\.)*)(?<!\.)"
  6.                 + @"@[a-z0-9][\w\.-]*[a-z0-9]\.[a-z][a-z\.]*[a-z]$";
  7.  
  8.             return new Regex(pattern, RegexOptions.IgnoreCase);
  9.         }

Step 5

Initialize the method that you have created.
  1.  
  2.         static Regex validate_emailaddress = email_validation();

Step 6

Write the following code to validate an email in a textbox when the button is clicked.
  1.    
  2.         private void button1_Click(object sender, EventArgs e)
  3.         {
  4.             if (validate_emailaddress.IsMatch(textBox1.Text) != true)
  5.             {
  6.                 MessageBox.Show("Invalid Email Address!", "Invalid", MessageBoxButtons.OK, MessageBoxIcon.Exclamation);
  7.                 textBox1.Focus();
  8.                 return;
  9.             }else
  10.             {
  11.                 MessageBox.Show("Email Address is valid.");
  12.             }
  13.  
  14.         }
For any questions about this article. You can contact me @ Email – [email protected] Mobile No. – 09305235027 – TNT Or feel free to comment below.
Tags
c#
Email Validation
Validate an Email in a Textbox

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