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  Dec 14 2014 8:26AM     Pragathi
  0 Comments    1532 Views  
Here Pragathi provided a short tutorial to send Email in ASP.Net using C#/VB.
HTML
Below is the sample HTML code,

<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <title></title>
</head>
<body>
    <form id="form1" runat="server">
    <h2>
        Compose Mail</h2>
    <div>
        <table>
            <tr>
                <td>
                    <span>To:</span>
                </td>
                <td>
                    <asp:TextBox ID="txtReceiver" runat="server"></asp:TextBox>
                </td>
            </tr>
            <tr>
                <td>
                    <br >
                </td>
            </tr>
            <tr>
                <td>
                    <span>Subject:</span>
                </td>
                <td>
                    <asp:TextBox ID="txtSubject" runat="server"></asp:TextBox>
                </td>
            </tr>
            <tr>
                <td>
                    <br >
                </td>
            </tr>
            <tr>
                <td>
                    <span>Body:</span>
                </td>
                <td>
                    <asp:TextBox ID="txtBody" TextMode="MultiLine" runat="server"></asp:TextBox>
                </td>
            </tr>
            <tr>
                <td>
                    <br >
                </td>
            </tr>            
            <tr>
                <td>
                    <asp:Button ID="btnSend" runat="server" Text="Send" OnClick="btnSend_Click" />
                </td>
                <td>
                <asp:Label ID="lblMessage" runat="server"></asp:Label>
                </td>
            </tr>
        </table>
    </div>
    </form>
</body>
</html>

Namespaces
You will need to import the following namespace.
C#

using System.Net.Mail;
using System.IO;

VB

Imports System.Net.Mail
Imports System.IO

Code for SEND Button
Below is the sample code for SEND button "btnSend_Click" Click Event in ASP.Net C#/VB.
C#

protected void btnSend_Click(object sender, EventArgs e)
{
            bool result = sendmail(txtReceiver.Text.Trim(), txtSubject.Text.Trim(), txtBody.Text.Trim());

            if (result)
                lblMessage.Text = "Email Sent successfully.";
            else
                lblMessage.Text = "Email Sending failed.";
}

VB

Protected Sub btnSend_Click(sender As Object, e As EventArgs)

         Dim result As Boolean = sendmail(txtReceiver.Text.Trim(), txtSubject.Text.Trim(), txtBody.Text.Trim())

         If result Then
              lblMessage.Text = "Email Sent successfully."
         Else
              lblMessage.Text = "Email Sending failed."
         End If

End Sub

Method for Sending E-Mail
Below is the sample code for Send E-Mail Method in ASP.Net C#/VB. This methods gets the parameter Receiver MailID, Subject and Body text.
C#

public bool sendmail(string recievermailid, string subject, string bodyText)
{
            try
            {
                string senderId = "********"// Sender EmailID
                string senderPassword = "*********"// Sender Password

                System.Net.Mail.MailMessage mailMessage = new System.Net.Mail.MailMessage();
                mailMessage.To.Add(recievermailid);
                mailMessage.From = new MailAddress(senderId);

                mailMessage.Subject = subject;
                mailMessage.SubjectEncoding = System.Text.Encoding.UTF8;

                mailMessage.Body = bodyText;
                mailMessage.BodyEncoding = System.Text.Encoding.UTF8;
                mailMessage.IsBodyHtml = false;

                mailMessage.Priority = MailPriority.High;

                SmtpClient smtpClient = new SmtpClient();
                smtpClient.Credentials = new System.Net.NetworkCredential(senderId, senderPassword);
                smtpClient.Port = 587;
                smtpClient.Host = "smtp.gmail.com";
                smtpClient.EnableSsl = true;

                object userState = mailMessage;

                try
                {
                    smtpClient.Send(mailMessage);
                    return true;
                }
                catch (System.Net.Mail.SmtpException)
                {
                    return false;
                }
            }
            catch (Exception)
            {
                return false;
            }
}

VB

Public Function sendmail(ByVal recievermailid As StringByVal subject As StringByVal bodyText As StringAs Boolean

            Try
                
                Dim senderId As String =  "**********"  ' Sender EmailID
                Dim senderPassword As String =  "*******"  ' Sender Password
 
                Dim mailMessage As System.Net.Mail.MailMessage =  New System.Net.Mail.MailMessage() 
                mailMessage.To.Add(recievermailid)
                mailMessage.From = New (senderId)
 
                mailMessage.Subject = subject
                mailMessage.SubjectEncoding = System.Text.Encoding.UTF8
 
                mailMessage.Body = bodyText
                mailMessage.BodyEncoding = System.Text.Encoding.UTF8
                mailMessage.IsBodyHtml = False
 
                mailMessage.Priority = MailPriority.High
 
                Dim smtpClient  SmtpClient =  New () 
                smtpClient.Credentials = New System.Net.NetworkCredential(senderId, senderPassword)
                smtpClient.Port = 587
                smtpClient.Host = "smtp.gmail.com"
                smtpClient.EnableSsl = True
 
                Dim userState As Object =  mailMessage 
 
                Try
                    smtpClient.Send(mailMessage)
                    Return True
                Catch
                    Return False
            Catch
                Return False
                End Try
            End Try

End Function

Finally, if you are facing any issue like "The SMTP server requires a secure connection or the client was not authenticated". For that, you should enable application to access gmail account. Please Click Here to Solve.
Result
Result and Page design as Shown Below,
I hope this page will helps to send E-Mail in ASP.Net application. Thanks.
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