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How to retrieve a webpage using ASP.NET 2.0 and C# .NET
This tutorial will show you how to retrieve an external webpage using the .NET System.Net class, ASP.NET 2.0 and C#.NET
The .NET Framework offers a number of types that makes accessing resources on the network easy.
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To display an external webpage we will need to use the System.IO, System.Net, and System.Text namespaces.
using System.IO
using System.Net
using System.Text |
We'll put our code in the Page_Load() event.
When the Page_Load() event fires it instantiates a new WebRequest object with the URL that we wish to retrieve. We then execute the GetResponse() method of this new object which returns a WebResponse object. After this is complete it is simply a matter of executing the GetResponseStream() method of the WebResponse object and reading the stream that is returned.
protected void Page_Load(object sender, EventArgs e)
{
WebRequest req = WebRequest.Create("http://www.google.com");
WebResponse resp = req.GetResponse();
Stream s = resp.GetResponseStream();
StreamReader sr = new StreamReader(s,Encoding.ASCII);
string doc = sr.ReadToEnd();
lblStatus.Text = doc;
} |
The front end .aspx page looks something like this:
<table width="600" border="0" align="center" cellpadding="5" cellspacing="1" bgcolor="#5482fc">
<tr>
<td height="50" align="center" class="lgHeader1">How to Display Data using the DataList control ASP.NET
2.0 and C#</td> </tr>
<br />
<table width="600" border="0" align="center" cellpadding="5" cellspacing="1" bgcolor="#cccccc">
<tr>
<td width="100" align="right" bgcolor="#eeeeee" class="header1"> External WebPage:</td> <td align="center" bgcolor="#FFFFFF"> <asp:label ID="lblStatus" runat="server"></asp:label></td> </tr> |
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The flow for the code behind page is as follows:
using System;
using System.Data;
using System.Configuration;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using System.IO;
using System.Net;
using System.Text;
public partial class _Default : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e) {
WebRequest req = WebRequest.Create("http://www.google.com");
WebResponse resp = req.GetResponse();
Stream s = resp.GetResponseStream();
StreamReader sr = new StreamReader(s,Encoding.ASCII);
string doc = sr.ReadToEnd();
lblStatus.Text = doc; } |
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