/// <summary>
/// Convert the specified HTML string to a PNG image and send the
/// image as an attachment to the browser
/// </summary>
private void ConvertHTMLStringToImage()
{
string htmlString = textBoxHTMLCode.Text;
string baseURL = textBoxBaseURL.Text.Trim();
// Create the Image converter. Optionally the HTML viewer width can be specified as parameter
// The default HTML viewer width is 1024 pixels.
ImgConverter imgConverter = new ImgConverter();
// set the license key
imgConverter.LicenseKey = "B4mYiJubiJiInIaYiJuZhpmahpGRkZE=";
// set if the JavaScript is enabled during conversion - default is true
imgConverter.JavaScriptEnabled = cbClientScripts.Checked;
// Performs the conversion and get the image bytes that can be further
// saved to a file or sent as a browser response
//
// The baseURL parameter helps the converter to get the CSS files and images
// referenced by a relative URL in the HTML string.
byte[] imgBytes = null;
if (baseURL.Length > 0)
imgBytes = imgConverter.GetImageBytesFromHtmlString(htmlString, System.Drawing.Imaging.ImageFormat.Png, baseURL);
else
imgBytes = imgConverter.GetImageBytesFromHtmlString(htmlString, System.Drawing.Imaging.ImageFormat.Png);
// send the image as a response to the browser for download
System.Web.HttpResponse response = System.Web.HttpContext.Current.Response;
response.Clear();
response.AddHeader("Content-Type", "image/png");
response.AddHeader("Content-Disposition", String.Format("attachment; filename=GettingStarted.png; size={0}", imgBytes.Length.ToString()));
response.BinaryWrite(imgBytes);
// Note: it is important to end the response, otherwise the ASP.NET
// web page will render its content to image stream
response.End();
}
