Capture Screenshot (Snapshot) Image of Website (Web Page) with Download and Send Email option in ASP.Net using C# and VB.Net

Ref

http://www.aspsnippets.com/Articles/Capture-Screenshot-Snapshot-Image-of-Website-Web-Page-in-ASPNet-using-C-and-VBNet.aspx

HTML

<asp:TextBox ID="txtUrl" runat="server" Text="" />
<asp:Button Text="Capture" runat="server" OnClick="Capture" />
<br />
<asp:Image ID="imgScreenShot" runat="server" Height="500" Width="700" Visible="false" />
<br />
<asp:Button Text="Download Image" OnClick="DownLoadImage" runat="server" />
<asp:Button Text="Send Email" OnClick="SendEmail" runat="server" />

Namespaces

using System.IO;
using System.Drawing;
using System.Threading;
using System.Windows.Forms;
using System.Net.Mail;
using System.Net;

C#

protected void Capture(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(DocumentCompleted);
            while (browser.ReadyState != WebBrowserReadyState.Complete)
            {
                System.Windows.Forms.Application.DoEvents();
            }
        }
    });
    thread.SetApartmentState(ApartmentState.STA);
    thread.Start();
    thread.Join();
}

private void DocumentCompleted(object sender, WebBrowserDocumentCompletedEventArgs e)
{
    WebBrowser browser = sender as WebBrowser;
    using (Bitmap bitmap = new Bitmap(browser.Width, browser.Height))
    {
        browser.DrawToBitmap(bitmap, new Rectangle(0, 0, browser.Width, browser.Height));
        using (MemoryStream stream = new MemoryStream())
        {
            bitmap.Save(stream, System.Drawing.Imaging.ImageFormat.Png);
            byte[] bytes = stream.ToArray();
            imgScreenShot.Visible = true;
            imgScreenShot.ImageUrl = "data:image/png;base64," + Convert.ToBase64String(bytes);
        }
    }
}

// Downloading the image
protected void DownLoadImage(object sender, EventArgs e)
{
    byte[] bytes = Convert.FromBase64String(imgScreenShot.ImageUrl.Split(',')[1]);
    Response.Clear();
    Response.Buffer = true;
    Response.Charset = "";
    Response.Cache.SetCacheability(HttpCacheability.NoCache);
    Response.ContentType = "image/png";
    Response.AppendHeader("Content-Disposition", "attachment; filename=" + "abc.png");
    Response.BinaryWrite(bytes);
    Response.Flush();
    Response.End();
}

//Send the image as attachment
protected void SendEmail(object sender, EventArgs e)
{
    using (MailMessage mm = new MailMessage("From@email.com", "To@email.com"))
    {
        mm.Subject = "";
        mm.Body = "";
        MemoryStream memoryStream = new MemoryStream();
        byte[] contentAsBytes = Convert.FromBase64String(this.imgScreenShot.ImageUrl.Split(',')[1]);
        memoryStream.Write(contentAsBytes, 0, contentAsBytes.Length);
        // Set the position to the beginning of the stream.
        memoryStream.Seek(0, SeekOrigin.Begin);
        Attachment attachment = new Attachment(memoryStream, "image/png");
        mm.IsBodyHtml = false;
        SmtpClient smtp = new SmtpClient();
        smtp.Host = "smtp.gmail.com";
        smtp.EnableSsl = true;
        NetworkCredential NetworkCred = new NetworkCredential("UserName@123.com", "Password");
        smtp.UseDefaultCredentials = true;
        smtp.Credentials = NetworkCred;
        smtp.Port = 587;
        smtp.Send(mm);
        ClientScript.RegisterStartupScript(GetType(), "alert", "alert('Email sent.');", true);
    }
}

Image Email sending is not tested. Please check it.