To
capture web page screenshot first create new
website à Right click on website à Select Add Reference à Select System.Windows.Forms
and click OK
 |
Once
we add System.Windows.Forms reference
to our application then we need to write the code like as shown below
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title>take snapshot(screenshot) of webpage in asp.net</title>
</head>
<body>
<form id="form1"
runat="server">
<table>
<tr>
<td><b>Enter Web Url:</b></td>
<td><asp:TextBox ID="txtweburl"
runat="server"
/></td>
</tr>
<tr>
<td></td>
<td>
<asp:Button ID="btnscreenshot"
Text="Take
Screenshot" runat="server" OnClick="btnscreenshot_click" />
</td>
</tr>
</table>
<br />
<asp:Image ID="imgscreenshot"
runat="server"
Visible = "false" Height="500" Width="500" />
</form>
</body>
</html>
|
Now
in code behind add the following namespaces
C#
Code
using System;
using System.Drawing;
using System.IO;
using System.Threading;
using System.Windows.Forms;
|
After that add below code in code behind
protected void
Page_Load(object sender, EventArgs e)
{
}
protected void
btnscreenshot_click(object sender, EventArgs e)
{
Thread thread = new
Thread(GenerateThumbnail);
thread.SetApartmentState(ApartmentState.STA);
thread.Start();
thread.Join();
}
private void
GenerateThumbnail()
{
WebBrowser webrowse = new
WebBrowser();
webrowse.ScrollBarsEnabled = false;
webrowse.AllowNavigation = true;
webrowse.Navigate(txtweburl.Text.Trim());
webrowse.Width = 1024;
webrowse.Height = 768;
webrowse.DocumentCompleted +=
webbrowse_DocumentCompleted;
while (webrowse.ReadyState != WebBrowserReadyState.Complete)
{
System.Windows.Forms.Application.DoEvents();
}
}
private void
webbrowse_DocumentCompleted(object sender, WebBrowserDocumentCompletedEventArgs e)
{
WebBrowser webrowse = sender as
WebBrowser;
Bitmap bitmap = new
Bitmap(webrowse.Width, webrowse.Height);
webrowse.DrawToBitmap(bitmap,
webrowse.Bounds);
MemoryStream stream = new
MemoryStream();
bitmap.Save(stream, System.Drawing.Imaging.ImageFormat.Jpeg);
byte[] strbytes = stream.ToArray();
imgscreenshot.Visible = true;
imgscreenshot.ImageUrl = "data:image/jpeg;base64," + Convert.ToBase64String(strbytes);
}
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VB.NET
Code
Imports System.Drawing
Imports System.IO
Imports System.Threading
Imports System.Windows.Forms
Partial Class vbcode
Inherits System.Web.UI.Page
Protected Sub
Page_Load(ByVal sender As Object, ByVal e As
EventArgs)
End Sub
Protected Sub
btnscreenshot_click(ByVal sender As Object, ByVal e As
EventArgs)
Dim thread As New Thread(AddressOf
GenerateThumbnail)
thread.SetApartmentState(ApartmentState.STA)
thread.Start()
thread.Join()
End Sub
Private Sub
GenerateThumbnail()
Dim webrowse As New WebBrowser()
webrowse.ScrollBarsEnabled = False
webrowse.AllowNavigation = True
webrowse.Navigate(txtweburl.Text.Trim())
webrowse.Width = 1024
webrowse.Height = 768
AddHandler webrowse.DocumentCompleted, AddressOf webbrowse_DocumentCompleted
While webrowse.ReadyState <>
WebBrowserReadyState.Complete
System.Windows.Forms.Application.DoEvents()
End While
End Sub
Private Sub
webbrowse_DocumentCompleted(ByVal sender As Object, ByVal e As
WebBrowserDocumentCompletedEventArgs)
Dim webrowse As WebBrowser = TryCast(sender, WebBrowser)
Dim bitmap As New Bitmap(webrowse.Width, webrowse.Height)
webrowse.DrawToBitmap(bitmap,
webrowse.Bounds)
Dim stream As New MemoryStream()
bitmap.Save(stream,
System.Drawing.Imaging.ImageFormat.Jpeg)
Dim strbytes As Byte() = stream.ToArray()
imgscreenshot.Visible = True
imgscreenshot.ImageUrl = "data:image/jpeg;base64," &
Convert.ToBase64String(strbytes)
End Sub
End Class
|
Demo
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