public Window()
{
int viewHeight = 20000;
// Disables GPU process and changes maximum texture size
// value from default 16384 to viewHeight. The maximum texture size value
// indicates the maximum height of the canvas where Chromium
// renders web page's content. If the web page's height
// exceeds the maximum texture size, the part of outsize the
// texture size will not be drawn and will be filled with
// black color.
String[] switches =
{
"--disable-gpu",
"--disable-gpu-compositing",
"--max-texture-size=" + viewHeight
};
BrowserPreferences.SetChromiumSwitches(switches);
// #1 Create LIGHTWEIGHT Browser instance.
browserView = new WinFormsBrowserView(BrowserFactory.Create(BrowserType.LIGHTWEIGHT));
AutoSize = true;
AutoSizeMode = System.Windows.Forms.AutoSizeMode.GrowAndShrink;
// Controls.Add(browserView);
this.Load += delegate
{
Browser browser = browserView.Browser;
// #1 Set browser initial size
browserView.Browser.SetSize(1280, 1024);
// #2 Load web page and wait until web page is loaded completely.
ManualResetEvent resetEvent = new ManualResetEvent(false);
FinishLoadingFrameHandler listener = new FinishLoadingFrameHandler((object sender, FinishLoadingEventArgs e) =>
{
if (e.IsMainFrame)
{
resetEvent.Set();
}
});
browser.FinishLoadingFrameEvent += listener;
try
{
browser.LoadURL("teamdev.com/dotnetbrowser");
resetEvent.WaitOne(new TimeSpan(0, 0, 45));
}
finally
{
browser.FinishLoadingFrameEvent -= listener;
}
// #3 Set the required document size.
JSValue documentHeight = browserView.Browser.ExecuteJavaScriptAndReturnValue(
"Math.max(document.body.scrollHeight, " +
"document.documentElement.scrollHeight, document.body.offsetHeight, " +
"document.documentElement.offsetHeight, document.body.clientHeight, " +
"document.documentElement.clientHeight);");
JSValue documentWidth = browserView.Browser.ExecuteJavaScriptAndReturnValue(
"Math.max(document.body.scrollWidth, " +
"document.documentElement.scrollWidth, document.body.offsetWidth, " +
"document.documentElement.offsetWidth, document.body.clientWidth, " +
"document.documentElement.clientWidth);");
int scrollBarSize = 25;
int viewWidth = (int)documentWidth.GetNumber() + scrollBarSize;
viewHeight = (int)documentHeight.GetNumber() + scrollBarSize;
var viewSize = new Size(viewWidth, viewHeight);
// #4 Register OnRedraw to get notifications
// about paint events. We expect that web page will be completely rendered twice:
// 1. When its size is updated.
// 2. When HTML content is loaded and displayed.
ManualResetEvent waitEvent = new ManualResetEvent(false);
DrawingView drawingView = (DrawingView)browserView.GetInnerView();
drawingView.OnRedraw += delegate(object sender, OnRedrawEventArgs e)
{
// Make sure that all view content has been repainted.
if (e.UpdatedRect.Size.Equals(viewSize))
{
// #6 Save Image of the loaded web page into a PNG file.
browserView.GetImage().Save(@"teamdev.png", ImageFormat.Png);
DialogResult = DialogResult.Cancel;
}
};
browserView.Browser.SetSize(viewWidth, viewHeight);
};
}
private void toolStripUpload_Click(object sender, EventArgs e)
{
//Create new browser for rendering
WinFormsBrowserView browserView1 = new WinFormsBrowserView(BrowserFactory.Create(BrowserType.LIGHTWEIGHT));
Browser browser = browserView1.Browser;
// #1 Set browser initial size
browserView1.Browser.SetSize(1280, 1024);
// #2 Load web page and wait until web page is loaded completely.
ManualResetEvent resetEvent = new ManualResetEvent(false);
FinishLoadingFrameHandler listener = new FinishLoadingFrameHandler((object sender1, FinishLoadingEventArgs e1) =>
{
if (e1.IsMainFrame)
{
resetEvent.Set();
}
});
browser.FinishLoadingFrameEvent += listener;
try
{
browser.LoadURL(toolStripAddress.Text.ToString());
resetEvent.WaitOne(new TimeSpan(0, 0, 45));
}
finally
{
browser.FinishLoadingFrameEvent -= listener;
}
// #3 Set the required document size.
JSValue documentHeight = browserView1.Browser.ExecuteJavaScriptAndReturnValue(
"Math.max(document.body.scrollHeight, " +
"document.documentElement.scrollHeight, document.body.offsetHeight, " +
"document.documentElement.offsetHeight, document.body.clientHeight, " +
"document.documentElement.clientHeight);");
JSValue documentWidth = browserView1.Browser.ExecuteJavaScriptAndReturnValue(
"Math.max(document.body.scrollWidth, " +
"document.documentElement.scrollWidth, document.body.offsetWidth, " +
"document.documentElement.offsetWidth, document.body.clientWidth, " +
"document.documentElement.clientWidth);");
int scrollBarSize = 25;
int viewWidth = (int)documentWidth.GetNumber() + scrollBarSize;
int viewHeight = (int)documentHeight.GetNumber() + scrollBarSize;
// #4 Register OnRepaint to get notifications
// about paint events. We expect that web page will be completely rendered twice:
// 1. When its size is updated.
// 2. When HTML content is loaded and displayed.
//ManualResetEvent waitEvent = new ManualResetEvent(false);
DrawingView drawingView = (DrawingView)browserView1.GetImage();
browserView1.Browser.SetSize(viewWidth, viewHeight);
// #5 Wait until Chromium renders web page content.
//waitEvent.WaitOne();
// #6 Save Image of the loaded web page into a PNG file.
//Create Save file dialog
SaveFileDialog saveFileDialog = new SaveFileDialog();
saveFileDialog.Filter = "PNG files (*.PNG)|*.PNG|All files (*.*)|*.*";
saveFileDialog.FilterIndex = 1;
saveFileDialog.RestoreDirectory = true;
//Choose path and name to save the file
if (saveFileDialog.ShowDialog() == DialogResult.OK)
{
//Format name of file
string imageFileName = saveFileDialog.FileName.ToString().Replace("%.png%", "");
browserView1.GetImage().Save(imageFileName, ImageFormat.Png);
}
if (!browser.IsDisposed())
{
browserView1.Dispose();
browser.Dispose();
}
}