Sending Mails with Attachments in Asp.Net SharePoint 2013

In this article I’m going to explain about sending mails in asp.net SharePoint 2013 application with attachments..

Design UI as shown in below figure with validations.

.aspx code:-

<table ><tr> <td ><strong>To:</strong></td>

        <td > <asp:TextBox ID="txtto" runat="server"  Width="310px" /> </td>

    </tr>

    <tr><td ><strong>Cc:</strong></td>

        <td ><asp:TextBox ID="txtcc" runat="server"  Width="310px"/>

            <asp:RegularExpressionValidator ID="regexcc" runat="server" ControlToValidate="txtcc" ErrorMessage="Enter a valid Email" Style="color: #FF0000" ValidationExpression="^((\w+([-+.]\w+)*@\w+([-.]\w+)*\.\w+([-.]\w+)*)\s*[;]{0,1}\s*)+$" ValidationGroup="MailValidation"/></td><tr>

    <tr><td ><strong>Bcc:</strong></td>

        <td > <asp:TextBox ID="txtbcc" runat="server" Width="310px"/>

            <asp:RegularExpressionValidator ID="gerexbcc" runat="server" ControlToValidate="txtbcc" ErrorMessage="Enter a valid Email" Style="color: #FF0000" ValidationExpression="^((\w+([-+.]\w+)*@\w+([-.]\w+)*\.\w+([-.]\w+)*)\s*[;]{0,1}\s*)+$" ValidationGroup="MailValidation"/></td></tr>

    <tr><td ><strong>Subject:<strong style="color: #FF0000">*</strong></strong></td>

        <td ><asp:TextBox ID="txtsubject" runat="server" Width="310px"/>

            <asp:RequiredFieldValidator ID="rfvsubject" runat="server" ControlToValidate="txtsubject" ErrorMessage="Please Enter Subject" ForeColor="Red" ValidationGroup="MailValidation"/></td></tr>

    <tr><td  ><strong>Body:<strong style="color: #FF0000">*</strong></strong></td>

        <td ><asp:TextBox ID="txtbody" runat="server" TextMode="MultiLine" Rows="10" />

            <asp:RequiredFieldValidator ID="rfvbody" runat="server" ControlToValidate="txtbody" ErrorMessage="Please Enter Body" ForeColor="Red" ValidationGroup="MailValidation" /> </td> </tr>

    <tr> <td ><strong>Attachments<strong style="color: #FF0000">*</strong></strong></td>

        <td >       

            <asp:FileUpload ID="FileUpAttachment" runat="server" AllowMultiple="true" />

        </td>

    </tr>  

    <tr>   <td class="auto-style11">&nbsp; </td>

        <td> <asp:Button ID="btnsend"  runat="server" BackColor="#066093" Font-Bold="True" ForeColor="White" Text="Send" ValidationGroup="MailValidation" Height="31px" Width="78px" OnClick="btnsend_Click" /> </td> </tr>

</table>

        <asp:Label ID="lblResult" runat="server" ></asp:Label>

In this .aspx code RegularExpression Validation control is for multiple mails means it will allow multiple mails with ‘;’ separation.

ValidationExpression="^((\w+([-+.]\w+)*@\w+([-.]\w+)*\.\w+([-.]\w+)*)\s*[;]{0,1}\s*)+$"

Fill the necessary data and click on “Send” button to send mail like below.

To send mail through SharePoint application we need to use MailMessage class like below.

  MailMessage message = new MailMessage();

//Get the Sharepoint SMTP information from the

//SPAdministrationWebApplication

message.From = new MailAddress(SPAdministrationWebApplication.Local.OutboundMailSenderAddress.ToString());

                    message.To.Add(new MailAddress(txtto.Text));

                    message.IsBodyHtml = true;

                    message.CC.Add(new MailAddress(txtcc.Text));

                    message.Bcc.Add(new MailAddress(txtbcc.Text));

                    }

                    //Set the subject and of the message

                    message.Body = txtbody.Text;

                    message.Subject = txtsubject.Text;

                    message.Attachments.Add(new Attachment(attchMent.InputStream,attchMent.FileName));

                    //Create the SMTP client object and send the message

                    SmtpClient smtpClient = new SmtpClient(SPAdministrationWebApplication.Local.OutboundMailServiceInstance.Server.Address);

                    smtpClient.Send(message);

Thank you....!