Dopostback event coding if it doPostBack not available

<script type="text/javascript">

         //<![CDATA[

        

        

         function __doPostBack(eventTarget, eventArgument)

         {

             var theForm = document.getElementById("<%=form1.ClientID %>");

             if (!theForm.onsubmit || (theForm.onsubmit() != false))

             {

                 theForm.__EVENTTARGET.value = eventTarget;

                 theForm.__EVENTARGUMENT.value = eventArgument;

                 theForm.submit();

             }

         }

         //]]>

</script>

    <input type="hidden" name="__EVENTTARGET" id="__EVENTTARGET" value="" />

<input type="hidden" name="__EVENTARGUMENT" id="__EVENTARGUMENT" value="" />

Disable button using javascript

function disableButton(btnId) {

            var btn = document.getElementById(btnId);

            btn.enabled = false;

            btn.disabled = true;

        }

 OnClientClick="if(CheckEmptyRecordComment()==true)javascript:disableButton(this.id); else

return false;"

How to send mail using C#

string from = "", to = "", smtpServer = "", username = "", password = "", smtpport = "";

          

            smtpServer = ConfigurationSettings.AppSettings["Comment_Mail_SmptHost"];

            from = ConfigurationSettings.AppSettings["Comment_Onbehalf_Mail"];

            to = ConfigurationSettings.AppSettings["Comment_To_Mail"];

            username = ConfigurationSettings.AppSettings["Comment_From_Mail"];

            password = ConfigurationSettings.AppSettings["Comment_From_Password"];

            smtpport = ConfigurationSettings.AppSettings["Comment_Mail_Port"];

            StringBuilder strbuild = new StringBuilder();

            strbuild.Remove(0, strbuild.Length);

            strbuild.Append("Body");

            MailMessage msg = new MailMessage(from, to, "Subject", strbuild.ToString());

            msg.BodyEncoding = Encoding.ASCII;

            msg.IsBodyHtml = true;

            msg.SubjectEncoding = System.Text.Encoding.UTF8;

            msg.Priority = MailPriority.High;

            SmtpClient smtpClt = new SmtpClient(smtpServer, Convert.ToInt32(smtpport));

            smtpClt.Credentials = new NetworkCredential(username, password);

            smtpClt.Send(msg);

Note: when hosting on server change SMTPHost as localhost if it deployed in same server

Set Serial number for asp repeater

< %# Container.ItemIndex + 1 %>

Converting Dataset column to Array

String[] rowValuesForColumn =
Array.ConvertAll<DataRow, String>(
dataTable.Select(),
delegate(DataRow row) { return (String) row[columnName]; }
);