Validate the email Id

Question

Hi Professionals,

                               I'm trying to validate the email id.But i'm not getting .Here i attached my code. 

 

if (txtEmailID.Text == "")

try

{

bool isEmail = Regex.IsMatch(txtEmailID.Text.Trim(), @"\A(?:[A-Za-z0-9!#$%&'*+/=?^_`{|}~-]+(?:\.[A-Za-z0-9!#$%&'*+/=?^_`{|}~-]+)*@(?:[A-Za-z0-9](?:[A-Za-z0-9-]*[A-Za-z0-9])?\.)+[A-Za-z0-9](?:[A-Za-z0-9-]*[A-Za-z0-9])?)\Z");

if (txtEmailID.Text == "")

{

focustextbox.Text = txtEmailID.ID;

ShowPopUpMsg("Email ID must be given");

// throw new ApplicationException("Email ID must be given");

}

else if (!isEmail)

{

focustextbox.Text = txtEmailID.ID;

ShowPopUpMsg("Invalid E-Mail");

//throw new ApplicationException("Invalid E-Mail");

}

}

catch (Exception ex)

{

oErrorLog.WriteErrorLog(ex.ToString());

}

finally

{

if (objSqlDataReader != null)

{

objSqlDataReader.Dispose();

objSqlDataReader.Close();

}

}

}

catch (Exception ex)

{

oErrorLog.WriteErrorLog(ex.ToString());

}

finally

{

if (objSqlDataReader != null)

{

objSqlDataReader.Dispose();

objSqlDataReader.Close();

}

}