我有一个奇怪的问题,我拿了一个单词列表,并通过谷歌搜索单词创建截图.. 在它创建了50个截图后,它开始创建空白图像!!
有人可以帮我解决问题!
PS:如果我需要更清楚,请告诉我!
这是我用来创建屏幕截图的代码...在我的主页上我只是循环我的话!
有人可以帮助我解决问题
public class GeneateScreenshot
{
public void GenerateScreenshot()
{
}
public Bitmap GenerateScreenshot(string url)
{
// This method gets a screenshot of the webpage
// rendered at its full size (height and width)
return GenerateScreenshot(url, -1, -1);
}
public Bitmap GenerateScreenshot(string url, int width, int height)
{
// Load the webpage into a WebBrowser control
WebBrowser wb = new WebBrowser();
wb.ScrollBarsEnabled = false;
wb.ScriptErrorsSuppressed = true;
wb.Navigate(url);
while (wb.ReadyState != WebBrowserReadyState.Complete) { Application.DoEvents(); }
// Set the size of the WebBrowser control
wb.Width = width;
wb.Height = height;
if (width == -1)
{
// Take Screenshot of the web pages full width
wb.Width = wb.Document.Body.ScrollRectangle.Width;
}
if (height == -1)
{
// Take Screenshot of the web pages full height
wb.Height = wb.Document.Body.ScrollRectangle.Height;
}
// Get a Bitmap representation of the webpage as it's rendered in the WebBrowser control
Bitmap bitmap = new Bitmap(wb.Width, wb.Height);
wb.DrawToBitmap(bitmap, new Rectangle(0, 0, wb.Width, wb.Height));
wb.Dispose();
return bitmap;
}
}
答案 0 :(得分:1)
我怀疑DrawToBitmap
函数不是将WebBrowser控件转换为图像的正确方法。查看以下链接,看起来您需要使用一些本机方法来可靠地执行此操作:
WebBrowser.DrawToBitmap() or other methods?
Converting WebBrowser.Document To A Bitmap?
http://www.codeproject.com/Articles/58605/HTML-to-Image-in-C
P.S。使用此代码时,我很快被Google的机器人探测器接听,所以你也可能遇到麻烦。