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Create A Communications Application In ASP.NET 4.5.2 Using Visual Studio 2015

Introduction

In this article, you will learn how to create communications applications, like an email applications, using C#, ASP.NET, and Visual Studio 2015 Update 3.

Requirements
  • Visual Studio 2015 Update 3
  • ASP.NET 4.5.2

If you want to develop communications applications, you should follow the steps, mentioned below.

Step 1

Open Visual Studio 2015 Update 3, go to the File >> New >> Project. Or, use the shortcut key - "Ctrl+Shift +N".

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Step 2

Now, select Visual C# >> Web >> ASP.NET Web Application. Finally, click "OK" button.

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Step 3

Here, you can select the template  for your ASP.NET application. We are choosing "Empty" here. Now, click OK button.

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Step 4

Now, open the project and look for the  Solution Explorer .

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Step 5

Here, open the default .aspx. If you want a Web form, you can add the page (Web form) Add+New item (Ctrl+Shift+A).

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Step 6

Now, we can build the design using drag and drop method. Open the toolbox, if you want some options there. It should be like the textbox, label, and so on.

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Step 7

Here is the default.aspx code.

Default.aspx code

  1. <%@ Page Language="C#" AutoEventWireup="true" CodeBehind="communi.aspx.cs" Inherits="communication.communi" %>  
  2.     <!DOCTYPE html>  
  3.     <html xmlns="http://www.w3.org/1999/xhtml">  
  4.   
  5.     <head runat="server">  
  6.         <title></title>  
  7.         <link href="style.css" rel="stylesheet" type="text/css" />  
  8.         <style type="text/css">  
  9.             .auto-style1 {  
  10.                 width: 100%;  
  11.             }  
  12.         </style>  
  13.     </head>  
  14.   
  15.     <body>  
  16.         <form id="form1" runat="server">  
  17.             <div id="from">  
  18.                 <h1>ASP.Net COMMUNICATION APPLICATION</h1>  
  19.             </div>  
  20.             <div id="fromone">  
  21.                 <table class="auto-style1">  
  22.                     <tr>  
  23.                         <td>  
  24.                             <asp:Label ID="Label1" runat="server" Text="To(E-Mail Address)"></asp:Label>  
  25.                         </td>  
  26.                         <td>  
  27.                             <asp:TextBox ID="TextBox1" runat="server"></asp:TextBox>  
  28.                         </td>  
  29.                     </tr>  
  30.                     <tr>  
  31.                         <td>  
  32.                             <asp:Label ID="Label" runat="server" Text="Subject"></asp:Label>  
  33.                         </td>  
  34.                         <td>  
  35.                             <asp:TextBox ID="TextBox2" runat="server"></asp:TextBox>  
  36.                         </td>  
  37.                     </tr>  
  38.                 </table> <br />  
  39.                 <asp:Label ID="Label2" runat="server" Text="Message"></asp:Label><br />  
  40.                 <asp:TextBox ID="TextBox3" TextMode="MultiLine" runat="server" Height="82px" Width="357px"></asp:TextBox><br />  
  41.                 <asp:Button ID="Button1" runat="server" Text="SEND" /><br />  
  42.                 <asp:Label ID="Label3" runat="server" Text="Label"></asp:Label>  
  43.             </div>  
  44.         </form>  
  45.     </body>  
  46.   
  47.     </html>  
Step 8

Now, first of all, declare the header file, because this project is based on SMTP (Simple Mail Transfer Protocol). 

using System.Net.Mail;

Here, fill in the C# code.
  1. using System;  
  2. using System.Collections.Generic;  
  3. using System.Linq;  
  4. using System.Web;  
  5. using System.Web.UI;  
  6. using System.Web.UI.WebControls;  
  7. using System.Net.Mail;  
  8. namespace communication {  
  9.     public partial class communi: System.Web.UI.Page {  
  10.         protected void Page_Load(object sender, EventArgs e) {}  
  11.         protected void Button1_Click(object sender, EventArgs e) {  
  12.             SmtpClient SmtpServer = new SmtpClient("smtp.gmail.com");  
  13.             SmtpServer.Port = 587;  
  14.             SmtpServer.Credentials = new System.Net.NetworkCredential("[email protected]", "muthu@123");  
  15.         }  
  16.     }  
  17. }  
Step 9

Here, you can see the output.

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Step 10

Afterwards, add the File upload option in the Communication application.

Now, add the FileUpload control. Make use of the drag method.

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Step 11

Here, you can see the C# code.

Step 12

Now, you can see default.aspx code.

<asp:FileUpload ID="FileUpload1" runat="server" />

Step 13 

Now, you have the option of mailing with file upload feature.

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The file is uploaded and you can see the final output.

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