ASP.NET AND SQL SERVER: Check Internet Connection in Asp.net using C#, VB.NET

Monday, 11 March 2013

Check Internet Connection in Asp.net using C#, VB.NET

Check Internet Connection in Asp.net using C#, VB.NET Asp.net interview question and answer for fresher, C#.Net, dotnet interview question with answer for exp.

Introduction:

Here I will explain how to check internet connectivity of system in asp.net and C#.net VB.NET.

Description:
In my previous article i have explainedjQuery Get Number of Facebook likes, Shares, Comments using asp.net. Now I will explain how to check internet connectivity of system in asp.netusing C# and VB.NET.

We can check internet connectivity of system by downloading data of one website from server for that write code like as shown below

<head>

<title>Check Internet Connection Availability using Asp.net</title>

</head>

<body>

<div>

<asp:Button runat="server" ID="btnCheck" Text="Check Internet Connectivity" OnClick="btnCheck_Click" />

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

</div>

</form>

</body>

</html>

Now in code behind add the following namespaces

C# Code

using System;

using System.Net;

After that write the following code in code behind

protected void btnCheck_Click(object sender, EventArgs e)

{

WebClient client = new WebClient();

byte[] datasize = null;

try

{

datasize = client.DownloadData("http://www.google.com");

}

catch (Exception ex)

{

}

if (datasize != null && datasize.Length > 0)

lbltxt.Text = "Internet Connection Available.";

else

lbltxt.Text = "Internet Connection Not Available.";

}

VB.NET Code

Imports System.Net

Partial Class VBCode

Inherits System.Web.UI.Page

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

End Sub

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

Dim client As New WebClient()

Dim datasize As Byte() = Nothing

Try

datasize = client.DownloadData("http://www.google.com")

Catch ex As Exception

End Try

If datasize IsNot Nothing AndAlso datasize.Length > 0 Then

lbltxt.Text = "Internet Connection Available."

Else

lbltxt.Text = "Internet Connection Not Available."

End If

End Sub

End Class

Demo

ASP.NET AND SQL SERVER

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Monday, 11 March 2013

Check Internet Connection in Asp.net using C#, VB.NET

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