March 16, 2015 07:42 by
Peter
In this short article, I will tell you about How to Capture Screenshot Image of Website in ASP.NET 5. To catch the screenshot of page, I am making utilization of WebBrowser control of Windows Forms Application. Since the WebBrowser is a Windows Forms controls, so as to utilize it as a part of ASP.NET Web Projects, we will need to add reference to the accompanying libraries.
And here is the code that I used:
ASP.NET
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title> How to Capture Screenshot in ASP.NET</title>
</head>
<body>
<form id="form1" runat="server">
<table>
<tr>
<td>
<b>Enter WebSite Url:</b>
</td>
<td>
<asp:TextBox ID="txtUrl" runat="server" />
</td>
</tr>
<tr>
<td>
</td>
<td>
<asp:Button ID="btnCapture" Text="Capture" runat="server" OnClick="btnCapture_click" />
</td>
</tr>
</table>
<br />
<asp:Image ID="imgScreenshot" runat="server" Visible="false" Height="800" Width="800" />
</form>
</body>
</html>
Code for C#
using System.IO;
using System.Drawing;
using System.Threading;
using System.Windows.Forms;
public partial class CaptureWebsite : System.Web.UI.Page
{
protected void btnCapture_click(object sender, EventArgs e)
{
string url = txtUrl.Text.Trim();
Thread thread = new Thread(delegate()
{
using (WebBrowser browser = new WebBrowser())
{
browser.ScrollBarsEnabled = false;
browser.AllowNavigation = true;
browser.Navigate(url);
browser.Width = 1024;
browser.Height = 768;
browser.DocumentCompleted += new WebBrowserDocumentCompletedEventHandler(webbrowse_DocumentCompleted);
while (browser.ReadyState != WebBrowserReadyState.Complete)
{
System.Windows.Forms.Application.DoEvents();
}
}
});
thread.SetApartmentState(ApartmentState.STA);
thread.Start();
thread.Join();
}
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);
}
}
Code for VB.NET
Imports System.IO
Imports System.Drawing
Imports System.Threading
Imports System.Windows.Forms
Partial Public Class CaptureWebsite
Inherits System.Web.UI.Page
Protected Sub btnCapture_click(sender As Object, e As EventArgs)
Dim url As String = txtUrl.Text.Trim()
Dim thread As New Thread(Sub() Using browser As New WebBrowser()
browser.ScrollBarsEnabled = False
browser.AllowNavigation = True
browser.Navigate(url)
browser.Width = 1024
browser.Height = 768
browser.DocumentCompleted += New WebBrowserDocumentCompletedEventHandler(AddressOf webbrowse_DocumentCompleted)
While browser.ReadyState <> WebBrowserReadyState.Complete System.Windows.Forms.Application.DoEvents()
End While
End Using)
thread.SetApartmentState(ApartmentState.STA)
thread.Start()
thread.Join()
End Sub
Private Sub webbrowse_DocumentCompleted(sender As Object, 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
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