Wednesday, June 15, 2011

How to capture web page screenshot in using c#

In this tutorial you will learn how to capture webpage screenshot in using c#. You may got a requirement to capture the screenshot when user submits the form , etc. Most of the people purchase third party dll files and use them in their project to capture the screenshot of webpage. It is quite easy in and there is no need to purchase any dll. Let's have a look over how to do so.

How to capture web page screenshot in using c#

using System;
using System.Collections;
using System.Configuration;
using System.Data;
using System.Linq;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.HtmlControls;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Xml.Linq;
using System.Collections.Generic;
using System.Web.Services;
using System.Text;
using System.Windows.Forms;//must be included for capturing screenshot
public partial class capture_webpage_screenshot : System.Web.UI.Page 
    protected void Page_Load(object sender, EventArgs e)
    protected void btnSave_Click(object sender, EventArgs e)
        Bitmap bitmap = new Bitmap(Screen.PrimaryScreen.Bounds.Width, Screen.PrimaryScreen.Bounds.Height);
        Graphics graphics = Graphics.FromImage(bitmap as System.Drawing.Image);
        graphics.CopyFromScreen(25, 25, 25, 25, bitmap.Size);
        bitmap.Save(@"c:\screenshot\myscreenshot.bmp", ImageFormat.Bmp);

The code is ready. Just you have to do the following steps.

  1. Right click the project name
  2. Add reference -> .net tab and then choose namespace then press ok button.
  3. In .aspx code behind file you have to import the System.Windows.Formsnamespace and that’s it.
By customizing parameters used in CopyFromScreen() function, you can figure out how to capture the small portion of the screen, if required. Create a folder and give folder path in c# code just like above i have given. You can customize the code as well and give the dynamic name of bitmap file every time it is generated.


Manoel Leonardo Metelis Florindo said...

This is not working!

How can I see my page on the server there is a page?

The handle is invalid
Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.

Exception Details: System.ComponentModel.Win32Exception: The handle is invalid

Source Error:

Line 8424: Dim g As System.Drawing.Graphics = System.Drawing.Graphics.FromImage(s_Bitmap)
Line 8425:
Line 8426: g.CopyFromScreen(25, 25, 25, 25, s_Bitmap.Size)
Line 8427:
Line 8428:

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