validate email address in asp.net

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MSIL

If Page.IsValid Then
           Try
               Dim sfbEmailValidator As New EmailValidator()
               If txtFromDomain.Text.Length > 0 Then
                   sfbEmailValidator.SmtpHeloDomain = txtFromDomain.Text
               End If
               If txtSmtpPort.Text.Length > 0 Then
                   sfbEmailValidator.SmtpPort = Integer.Parse(txtSmtpPort.Text)
               End If
               If txtSmtpMail.Text.Length > 0 Then
                   sfbEmailValidator.SmtpFromEmail = txtSmtpMail.Text
               End If
               If txtDnsServer.Text.Length > 0 Then
                   sfbEmailValidator.DnsServers.Add(txtDnsServer.Text)
               End If
               sfbEmailValidator.ValidationLevel = DirectCast(Integer.Parse(ddlValidationLevel.SelectedValue), ValidationLevel)
               sfbEmailValidator.Validate(txtEmail.Text)



               lblResult.Text = sfbEmailValidator.SmtpTranscript.Replace("" & Chr(13) & "" & Chr(10) & "", "<br>")
           Catch exc As Exception
               lblResult.Text = "An exception occurred: " + exc.Message
           End Try
       End If
   End Sub

i am using above code to validate email address ?

where tell how we can find the valid email address you can say that result .
this mail is valid or not plz help me

Posted 26-May-11 23:02pm

joti parkash

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**R. Giskard Reventlov** · Answer 1 · 2011-05-26T23:05:00

Solution 1

Try using a RegularExpressionValidator on the page. This link[^] will get you started.

Posted 26-May-11 23:05pm

R. Giskard Reventlov

Comments

RaviRanjanKr 27-May-11 5:15am

Perfect Solution, My 5 :)

Kiran Sonawane 27-May-11 5:37am

my 5 +

Ashishmau · Answer 2 · 2011-05-26T23:11:00

Solution 2

u can do validation from javascript also.

see this link

http://www.tizag.com/javascriptT/javascriptform.php[^]

Posted 26-May-11 23:11pm

Ashishmau

Vijay Radia · Answer 3 · 2011-05-27T00:21:00

Use following functions for email validation. this will also validate domain values.. e.g. below functions will only validate emails having yahoo.com and gmail.com as domains.

SQL

function validate()
    {

C#

var pattern=/^([a-zA-Z0-9_.-])+@([a-zA-Z0-9_.-])+\.([a-zA-Z])+([a-zA-Z])+$/;
            //alert(pattern.test(Email));
            if(!pattern.test(Email))
            {
                alert("Enter a valid E-mail ID.");
                //loadXML('1008');
                document.getElementById('<%=txtEmail.ClientId %>').value ="";
                document.getElementById("<%=txtEmail.ClientId %>").focus();
                return false;
            }
            var res = isValidDomain();
            if (res==0)
            {
              return false;
            }

}

C#

function isValidDomain()
    {
      var Domain = "yahoo.com;gmail.com";
      var DomainList=Domain.split(",");
      var Email = document.getElementById("<%=txtEmail.ClientId %>").value;
      var userDomains = Email.split("@");
            var userDomain=userDomains[1]
            var part_num=0;
            var result=0;
            while (part_num < DomainList.length)
            {
              var srtdomain = DomainList[part_num];
              part_num+=1;
              if (srtdomain.toUpperCase()==userDomain.toUpperCase())
              {
                result=1;
                break;
              }
            }
            if (result==0)
            {
                var email = document.getElementById("<%=txtEmail.ClientId %>")
                email.disabled=false;
                alert("Enter a valid Domain Name.");
                document.getElementById("<%=txtEmail.ClientId %>").focus();
            }
            return result;
       }

Ra-one · Answer 4 · 2011-05-26T23:46:00

<asp:RegularExpressionValidator ID="RegularExpressionValidator1"
                    ValidationGroup="vgroup" runat="server" ControlToValidate="yourtextbox" Display="Dynamic"
                    ErrorMessage="Plese enter valid email address." ValidationExpression="\w+([-+.']\w+)*@\w+([-.]\w+)*\.\w+([-.]\w+)*"></asp:RegularExpressionValidator>

Add this and replace "yourtextbox" in ControlToValidate with your textbox.
Also set the validationGroup = "yourgrouphere". you are done

...Cheer's

validate email address in asp.net

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