Microsoft Edge WebView2 截图

使用工具可以保存可见区域

CallDevToolsProtocolMethodAsync("Page.captureScreenshot", Params) always returns only visible part of html page including scrollbars. I tried all possible combinations of "fromSurface" and "captureBeyondViewport" values, no difference. I'm using 1.0.705.50 WinForms.

使用下面方法最终解决

        public async Task<Image> TakeWebScreenshot(bool currentControlClipOnly = false){dynamic scl = null;Size    siz;if (!currentControlClipOnly){var  res = await wv2.CoreWebView2.ExecuteScriptAsync(@"var v = {""w"":document.body.scrollWidth, ""h"":document.body.scrollHeight}; v;");try{ scl = JObject.Parse(res); }catch{}}siz = scl != null ? new Size(   (int)scl.w > wv2.Width ? (int)scl.w : wv2.Width,(int)scl.h > wv2.Height ? (int)scl.h : wv2.Height ):wv2.Size;var img = await GetWebBrowserBitmap(siz);return img;}private async Task<Bitmap> GetWebBrowserBitmap(Size clipSize){dynamic clip        = new JObject();clip.x              = 0;clip.y              = 0;clip.width          = clipSize.Width;clip.height         = clipSize.Height;clip.scale          = 1;dynamic settings    = new JObject();settings.format     = "jpeg";settings.clip       = clip;settings.fromSurface            = true;settings.captureBeyondViewport  = true;var p = settings.ToString(Newtonsoft.Json.Formatting.None);var devData = await wv2.CoreWebView2.CallDevToolsProtocolMethodAsync("Page.captureScreenshot", p);var imgData = (string)((dynamic)JObject.Parse(devData)).data;var ms      = new MemoryStream(Convert.FromBase64String(imgData));return (Bitmap)Image.FromStream(ms);}