Common function to send Email in ASP.Net using C# and VB.Net

Hi jqdesigner,

First create a class and make  method , Provide parameter in method what are the field did you want. And call that method on your button click event.

Please refer below sample.

HTML

<table border="0" style="width: 409px">
    <tr>
        <td>
            <asp:Label ID="Label1" runat="server" Text="Name*"></asp:Label><br />
        </td>
        <td>
            <asp:TextBox ID="txtName" runat="server" ValidationGroup="contact"></asp:TextBox><br />
            <asp:RequiredFieldValidator ID="RequiredFieldValidator1" runat="server" ErrorMessage="*"
                ControlToValidate="txtName"></asp:RequiredFieldValidator>
        </td>
    </tr>
    <tr>
        <td>
            <asp:Label ID="Label2" runat="server" Text="Subject*"></asp:Label><br />
        </td>
        <td>
            <asp:TextBox ID="txtSubject" runat="server"></asp:TextBox><br />
            <asp:RequiredFieldValidator ID="RequiredFieldValidator2" runat="server" ErrorMessage="*"
                ControlToValidate="txtSubject"></asp:RequiredFieldValidator>
        </td>
    </tr>
    <tr>
        <td>
            <asp:Label ID="Label3" runat="server" Text="Email*"></asp:Label><br />
        </td>
        <td>
            <asp:TextBox ID="txtEmail" runat="server"></asp:TextBox><br />
            <asp:RegularExpressionValidator ID="valRegEx" runat="server" ControlToValidate="txtEmail"
                ValidationExpression=".*@.*\..*" ErrorMessage="*Invalid Email address." Display="dynamic">
            </asp:RegularExpressionValidator>
            <asp:RequiredFieldValidator ID="RequiredFieldValidator3" runat="server" ErrorMessage="*"
                ControlToValidate="txtEmail"></asp:RequiredFieldValidator>
        </td>
    </tr>
    <tr>
        <td valign="top">
            <asp:Label ID="Label4" runat="server" Text="Body*"></asp:Label>
        </td>
        <td>
            <asp:TextBox ID="txtBody" runat="server" TextMode="MultiLine"></asp:TextBox><br />
            <asp:RequiredFieldValidator ID="RequiredFieldValidator4" runat="server" ErrorMessage="*"
                ControlToValidate="txtBody"></asp:RequiredFieldValidator>
        </td>
    </tr>
    <tr>
        <td>
        </td>
        <td>
            <asp:Button ID="btnSend" runat="server" Text="Send" OnClick="btnSend_Click" />
        </td>
    </tr>
    <tr>
        <td>
        </td>
        <td>
            <asp:Label ID="lblMessage" runat="server" Text="" ForeColor="Green"></asp:Label>
        </td>
    </tr>
</table>

Namespaces

C#

using System.Net.Mail;

Code

SendEmail1.cs

using System.Net.Mail;

public class SendEmai1
{
    public void SendEmail(string subject, string name, string email, string body)
    {
        MailMessage mm = new MailMessage("sender@gmail.com", "receiver@gmail.com");
        mm.Subject = subject;
        mm.Body = "Name: " + name + "<br /><br />Email: " + email + "<br />" + body;
        mm.IsBodyHtml = true;
        SmtpClient smtp = new SmtpClient();
        smtp.Host = "smtp.gmail.com";
        smtp.EnableSsl = true;
        System.Net.NetworkCredential NetworkCred = new System.Net.NetworkCredential();
        NetworkCred.UserName = "sender@gmail.com";
        NetworkCred.Password = "xxxxx";
        smtp.UseDefaultCredentials = true;
        smtp.Credentials = NetworkCred;
        smtp.Port = 587;
        smtp.Send(mm);
    }
}

Cs.aspx.cs

protected void btnSend_Click(object sender, EventArgs e)
{
    SendEmai1 se = new SendEmai1();
    se.SendEmail(txtSubject.Text, txtName.Text, txtEmail.Text, txtBody.Text);
    lblMessage.Text = "Email Sent SucessFully.";
}