How to Validate email id entered in windows form textbox

Question

Hi....i am devoloping one windows application in that i want to validate email-id entered in textbox..please help me..

Hirendra Sisodiya · Answer

add reference od system.text.regularexpression and then use this code: private void txtEmail_Leave( object sender, EventArgs e) { Regex mRegxExpression; if (txtEmail.Text.Trim() != string .Empty) { mRegxExpression = new Regex( @"^([a-zA-Z0-9_\-])([a-zA-Z0-9_\-\.]*)@($$((25[0-5]|2[0-4][0-9]|1[0-9][0-9]|[1-9][0-9]|[0-9])\.){3}|((([a-zA-Z0-9\-]+)\.)+))([a-zA-Z]{2,}|(25[0-5]|2[0-4][0-9]|1[0-9][0-9]|[1-9][0-9]|[0-9])$$)$" ); if (!mRegxExpression.IsMatch(txtEmail.Text.Trim())) { MessageBox.Show( "E-mail address format is not correct." , "MojoCRM" , MessageBoxButtons.OK, MessageBoxIcon.Error); txtEmail.Focus(); } } } thanks Please mark as answer if it helps

Shivaraj Poojary · Answer

The information which u gave was very helpful...thanks a lot...

Hirendra Sisodiya · Answer

you can also try these link: http://www.radsoftware.com.au/articles/regexlearnsyntax.aspx http://www.exforsys.com/tutorials/csharp/regular-expressions-and-csharp-.net.html thanks

Hirendra Sisodiya · Answer

hello Shivraj Regular expressions provide a powerful, flexible, and efficient method for processing text. in above regular expression we can check input email id text format. check this article on msdn: http://support.microsoft.com/kb/308252 thanks

Shivaraj Poojary · Answer

if u dont mind can u give explanation for d below code...thank u... mRegxExpression = new Regex(@"^([a-zA-Z0-9_\-])([a-zA-Z0-9_\-\.]*)@($$((25[0-5]|2[0-4][0-9]|1[0-9][0-9]|[1-9][0-9]|[0-9])\.){3}|((([a-zA-Z0-9\-]+)\.)+))([a-zA-Z]{2,}|(25[0-5]|2[0-4][0-9]|1[0-9][0-9]|[1-9][0-9]|[0-9])$$)$");

How to Validate email id entered in windows form textbox

Answers (5)