Delete Data Using EDMF to Cloud Database With Azure

Introduction

Today, in this article let's play around with one of the interesting and most useful concept in Azure.

Question: What is delete data from cloud database using Azure?

In simple terms "It enables to delete data from cloud database and maintain with help of azure".

Step 1: Create a cloud database named "Company"

Step 2: With the help of manage URL navigate to specific server page

Manage URL: etc6zpqnyc.database.windows.net

Step 3: Company database showing up in the database server page

Step 4: Create an employee table. The design mode of employee table looks like this

Step 5: Insert some data into the table

Step 6: Open visual studio 2010 and create an "ASP.NET Web Forms Application", as in:

Step 7: Add an EDMF item to the project.

Step 8: Choose "Generate from database" and click the "Next" button, as in:

Step 9: Add a new connection.

Step 10: Give the necessary server details for the connection and click on ok.

server-details-for-connection-in-visual-studio-2010.jpg

Step 11: The Connection is established; click the "Next" button.

Step 12: Choose the required table and click the "Finish" button.

Step 13: The created EDMF and design of data looks like this:

Step 14: The complete code of default.aspx looks like this:

<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="Default.aspx.cs" Inherits="DeleteDataEFAzureApp._Default" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head id="Head1" runat="server">
<title></title>
</head>
<body>
<form id="form1" runat="server">
<center>
<div>
<table>
<tr>
<td colspan="2">
<asp:Label ID="Label1" runat="server" Text="Delete Data from Cloud Database with Azure"
Font-Bold="true" Font-Size="Large" Font-Names="Verdana" ForeColor="Maroon"></asp:Label>
</td>
</tr>
<tr>
<td>

<asp:Label ID="Label6" runat="server" Text="Please Enter Id" Font-Size="Large" Font-Names="Verdana"
Font-Italic="true"></asp:Label>
</td>

<td>
<asp:TextBox ID="TextBox4" runat="server"></asp:TextBox>
</td>
</tr>
<tr>
<td colspan="2" align="center">
<asp:Button ID="Button2" runat="server" Text="Delete Data from Cloud Database" Font-Names="Verdana"
Width="301px" BackColor="Orange" Font-Bold="True" OnClick="Button2_Click" />
</td>
</tr>
<tr>
<td colspan="2" align="center">
<asp:Label ID="Label5" runat="server" Font-Bold="true" Font-Names="Verdana" ForeColor="Maroon"></asp:Label>
</td>
</tr>
</table>
</div>
</center>
</form>
</body>
</html>

Step 15: The complete code of default.aspx.cs looks like this:

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
namespace DeleteDataEFAzureApp
{
public partial class _Default : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
TextBox4.Focus();
}
protected void Button2_Click(object sender, EventArgs e)
{
if (string.IsNullOrEmpty(TextBox4.Text))
{ Label5.Text = "Please Enter Some Values";
Label5.ForeColor = System.Drawing.Color.Red;
}
else
{
CompanyEntities objCompany = new CompanyEntities();
Employee deleteQuery; var id = int.Parse(TextBox4.Text);
deleteQuery = (from r in objCompany.Employees where r.ID == id select r).First();
objCompany.DeleteObject(deleteQuery);
objCompany.SaveChanges(); Label5.Text = "Data Deleted Successfully";

Label5.ForeColor = System.Drawing.Color.Green; TextBox4.Text = string.Empty;
}
}
}
}

Step 16: The output of the application looks like this:

Step 17: The output of table data before deleting the application looks like this:

Step 18: Data entering output of the application looks like this:

Step 19: Deleted data showing on the cloud output of the application looks like this:

Delete Data Using EDMF to Cloud Database With Azure

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