how to create image from page html passing as string [Answered] RSS

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  ermunishyada...

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  how to create image from page html passing as string

  Sep 01, 2012 08:08 AM|ermunishyadav|LINK

   
  hi
  
      I am using this code to coonvert page html into image
      but i am getting error in line
      (System.Drawing.Image img = System.Drawing.Image.FromStream(ms);)
      
     Error is : (Parameter is not valid.)
  
  
  full code here:
  
  string content = "";
          System.Net.WebRequest webRequest = WebRequest.Create("http://localhost:58534/EFTestApp/ScreenShot.aspx");
          System.Net.WebResponse webResponse = webRequest.GetResponse();
          System.IO.StreamReader sr = new StreamReader(webResponse.GetResponseStream(), System.Text.Encoding.GetEncoding("UTF-8"));
          content = sr.ReadToEnd().Trim();
          //save to file
          byte[] bytesToEncode = Encoding.UTF8.GetBytes(content);
          string encodedText = Convert.ToBase64String(bytesToEncode);
  
          byte[] b = Convert.FromBase64String(encodedText);
          using (System.IO.MemoryStream ms = new System.IO.MemoryStream(b, 0, b.Length))
          {
              System.Drawing.Image img = System.Drawing.Image.FromStream(ms);
              img.Save(Server.MapPath("screenshot/myscreenshot.bmp"), System.Drawing.Imaging.ImageFormat.Jpeg);
          }

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  ozkary

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  306 Posts

  Re: how to create image from page html passing as string

  Sep 01, 2012 12:04 PM|ozkary|LINK

  The System.Drawing.Image.FromStream class expects a stream with bytes from an image. You are passing html instead which is not the expected format. To verify this, replace your url to download a specific image like:

   System.Net.WebRequest webRequest = WebRequest.Create("http://localhost:58534/EFTestApp/images/animage.jpg");

  Your current code should work. 

    To capture a screen shot of a webpage, you could use the WebBrowser class which has this method DrawToBitmap.

  hope it helps

  ozkary.com
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