Question

使用WatiN拍摄图像时，生成的图像只是空的，纯黑色。但是，图像的大小等于屏幕大小。例如，以下代码段只保存了两张黑色图片。

using (IE ie = new IE()) {
            ie.ClearCache();
            ie.BringToFront();
            ie.GoTo("http://localhost/");
            ie.CaptureWebPageToFile(imageDir + "\\localhost.png");
            WatiN.Core.CaptureWebPage capture = new CaptureWebPage(ie);
            capture.CaptureWebPageToFile(imageDir + "\\localhost.jpg", true, true, 100, 80);
            Assert.IsTrue(ie.ContainsText("Zend"));
        }

其他人也报道了这一点，但我没有看到任何解决方案。看这里的评论： http://www.codeproject.com/KB/graphics/IECapture.aspx?display=PrintAll&fid=192174&df=90&mpp=25&noise=3&sort=Position&view=Quick&fr=51&select=1810490

希望任何人都能对此有所了解。

干杯 //约翰

Answer 1

我设法让它在IE8下的网页上工作，并进行了以下更改：

替换以下方法：

private static IntPtr GetHwndForInternetExplorerServer(IntPtr hwnd)
{
    var sbc = new StringBuilder(256);
    hwnd = NativeMethods.GetWindow(hwnd, NativeMethods.GW_CHILD);
    while (hwnd != IntPtr.Zero)
    {
        NativeMethods.GetClassName(hwnd, sbc, 256);
        if (sbc.ToString().IndexOf("Shell DocObject View", 0) > -1) //IE6
        {
            hwnd = NativeMethods.FindWindowEx(hwnd, IntPtr.Zero, "Internet Explorer_Server", IntPtr.Zero);
            break;
        }
        if (sbc.ToString().IndexOf("TabWindowClass", 0) > -1) //IE7
        {
            hwnd = NativeMethods.FindWindowEx(hwnd, IntPtr.Zero, "Shell DocObject View", IntPtr.Zero);
            hwnd = NativeMethods.FindWindowEx(hwnd, IntPtr.Zero, "Internet Explorer_Server", IntPtr.Zero);
            break;
        }
        if (sbc.ToString().IndexOf("Frame Tab", 0) > -1) // IE8
        {
            hwnd = NativeMethods.FindWindowEx(hwnd, IntPtr.Zero, "TabWindowClass", IntPtr.Zero);
            hwnd = NativeMethods.FindWindowEx(hwnd, IntPtr.Zero, "Shell DocObject View", IntPtr.Zero);
            hwnd = NativeMethods.FindWindowEx(hwnd, IntPtr.Zero, "Internet Explorer_Server", IntPtr.Zero);
            break;
        }
        hwnd = NativeMethods.GetWindow(hwnd, NativeMethods.GW_HWNDNEXT);
    }
    return hwnd;
}

删除方法GetHwndContainingAShellDocObjectView及其调用。

WatiN生成空页

1 个答案: