C# - How to Send Bulk Email in Asp.net with Example using C#, VB.NET - ASP.NET,C#.NET,VB.NET,JQuery,JavaScript,Gridview

C# - How to Send Bulk Email in Asp.net with Example using C#, VB.NET

By: Suresh Dasari Jul 3, 2014

Introduction:

here I will explain how to send bulk email in asp.net using c#, vb.net with example. To send mail to bulk people in asp.net we need to get all the user email ids and send mail to each emailid by using foreach loop in asp.net using c#, vb.net.

Description:

In previous post I explained send html page as mail body in asp.net, send mail with images using gmail user credentials, send multiple attachments with email in asp.net, how to send mail with attachment in asp.net and many more articles related to asp.net using c#, vb.net. Now I will explain how to send bulk email in asp.net using c#, vb.net with example.

First create new web application and add one html page (HTML.htm) to your application in that write the following code

HTML.htm

<body>

<tr>

<td><b><span style = "font-family:Arial;font-size:10pt">Admin:</span></b></td>

<td>$$Admin$$</td>

</tr>

<tr>

<td><b><span style = "font-family:Arial;font-size:10pt">CompanyName:</span></b></td>

<td>$$CompanyName$$</td>

</tr>

<tr>

<td><b><span style = "font-family:Arial;font-size:10pt">EMail:</span></b></td>

<td>$$Email$$</td>

</tr>

<tr>

<td><b><span style = "font-family:Arial;font-size:10pt">Website:</span></b></td>

<td>$$Website$$</td>

</tr>

</table>

<p><span style = "font-family:Arial;font-size:10pt">To know more about Aspdotnet-Suresh.com, please visit - http://www.aspdotnet-suresh.com </span> </p>

<span style = "font-family:Arial;font-size:10pt">Thanks</span>

<br />

<b><span style = "font-family:Arial;font-size:10pt">Aspdotnet-Suresh</span></b>

</body>

</html>

Now in your Default.aspx page write the following code

<head>

<title>Send Bulk mail in asp.net using c#</title>

</head>

<body>

<div>

<asp:GridView ID="gvDetails" runat="server">

</asp:GridView>

</div>

<asp:Button ID="btnSend" Text="Send Mail" runat="server" OnClick="btnSend_Click" />

</form>

</body>

</html>

After completion of aspx page write the following code in codebehind

C# Code

using System;

using System.Data;

using System.IO;

using System.Net.Mail;

using System.Web.UI.WebControls;

public partial class _Default : System.Web.UI.Page

{

protected void Page_Load(object sender, EventArgs e)

{

BindGridviewData();

}

/// <summary>

/// Dynamically create & bind data to gridview

/// </summary>

protected void BindGridviewData()

{

DataTable dt = new DataTable();

dt.Columns.Add("UserId", typeof(Int32));

dt.Columns.Add("UserName", typeof(string));

dt.Columns.Add("Education", typeof(string));

dt.Rows.Add(1, "Suresh Dasari", "sureshbabudasari@gmail.com");

dt.Rows.Add(2, "Rohini Dasari", "rohini@gmail.com");

dt.Rows.Add(3, "Madhav Sai", "madhav@gmail.com");

dt.Rows.Add(4, "Praveen", "praveen@hotmail.com");

dt.Rows.Add(6, "Sateesh", "sateesh@yahoo.com");

dt.Rows.Add(7, "Mahesh Dasari", "maheshd@gmail.com");

dt.Rows.Add(8, "Mahendra", "sureshbabudasari@hotmail.com");

gvDetails.DataSource = dt;

gvDetails.DataBind();

}

protected void btnSend_Click(object sender, EventArgs e)

{

foreach (GridViewRow grow in gvDetails.Rows)

{

string strContactName = grow.Cells[1].Text.Trim();

string strEmail = grow.Cells[2].Text.Trim();

StreamReader reader = new StreamReader(Server.MapPath("~/HTMLPage.htm"));

string readFile = reader.ReadToEnd();

string myString = readFile;

myString = myString.Replace("$$Admin$$", strContactName);

myString = myString.Replace("$$CompanyName$$", "Dasari Group");

myString = myString.Replace("$$Email$$", strEmail);

myString = myString.Replace("$$Website$$", "http://www.aspdotnet-suresh.com");

string from = "administrator@aspdotnet-suresh.com";

string to = strEmail;

MailMessage Msg = new MailMessage(from,to);

Msg.Subject = "Send Bulk mail for all users";

Msg.Body = myString;

Msg.IsBodyHtml = true;

string sSmtpServer = "10.82.42.122";

SmtpClient a = new SmtpClient();

a.Host = sSmtpServer;

a.Send(Msg);

reader.Dispose();

}

VB.NET Code

Imports System.Data

Imports System.IO

Imports System.Net.Mail

Imports System.Web.UI.WebControls

Partial Class VBCode

Inherits System.Web.UI.Page

Protected Sub Page_Load(ByVal sender As Object, ByVal e As EventArgs) Handles Me.Load

BindGridviewData()

End Sub

Protected Sub BindGridviewData()

Dim dt As New DataTable()

dt.Columns.Add("UserId", GetType(Int32))

dt.Columns.Add("UserName", GetType(String))

dt.Columns.Add("Education", GetType(String))

dt.Rows.Add(1, "Suresh Dasari", "sureshbabudasari@gmail.com")

dt.Rows.Add(2, "Rohini Dasari", "rohini@gmail.com")

dt.Rows.Add(3, "Madhav Sai", "madhav@gmail.com")

dt.Rows.Add(4, "Praveen", "praveen@hotmail.com")

dt.Rows.Add(6, "Sateesh", "sateesh@yahoo.com")

dt.Rows.Add(7, "Mahesh Dasari", "maheshd@gmail.com")

dt.Rows.Add(8, "Mahendra", "sureshbabudasari@hotmail.com")

gvDetails.DataSource = dt

gvDetails.DataBind()

End Sub

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

For Each grow As GridViewRow In gvDetails.Rows

Dim strContactName As String = grow.Cells(1).Text.Trim()

Dim strEmail As String = grow.Cells(2).Text.Trim()

Dim reader As New StreamReader(Server.MapPath("~/HTMLPage.htm"))

Dim readFile As String = reader.ReadToEnd()

Dim myString As String = readFile

myString = myString.Replace("$$Admin$$", strContactName)

myString = myString.Replace("$$CompanyName$$", "Dasari Group")

myString = myString.Replace("$$Email$$", strEmail)

myString = myString.Replace("$$Website$$", "http://www.aspdotnet-suresh.com")

Dim from As String = "administrator@aspdotnet-suresh.com"

Dim [to] As String = strEmail

Dim Msg As New MailMessage(from, [to])

Msg.Subject = "Send Bulk mail for all users"

Msg.Body = myString

Msg.IsBodyHtml = True

Dim sSmtpServer As String = "10.82.42.122"

Dim a As New SmtpClient()

a.Host = sSmtpServer

a.Send(Msg)

reader.Dispose()

End Class

Demo

Download Sample Code Attached

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5 comments :

Anonymous said...: Failure sending mail. i am getting error when i am trying to sent a mail to group; July 10, 2014 at 7:30 AM
Anonymous said...: if any mail Id is wrong ,message sending is failed. Plz Give me suggestion; August 28, 2014 at 12:33 AM
Unknown said...: your code looks good just for 20-30 email ids,, but if use 500 or more emails then program shows time out as it takes a lot of time so that server displays time out error.
how we can get rid of this problem.?; November 6, 2014 at 1:53 PM
Unknown said...: Above anonymous user, use can use jquery/ javascript code to check mail ids.
go n google for that; November 6, 2014 at 1:56 PM
Jig said...: mail sending fails; May 13, 2015 at 12:20 AM

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