winform截图form图的问题

[qq_36434521]

下面是我添加了CefSharp组件中的ChromiumWebBrowser，在我实际运行的窗体上是显示这个控件的，但是我截取的form图中不显示这个浏览器控件，我修改了下它的一些背景色、边框线都能显示出来，不知道为什么。求大神帮忙看一下，这个问题困扰了我好久了QWQ

其实我的需求是单独截取浏览器的截图，一开始截取下来的浏览器截图是空白的，找不到问题才有了下面的测试

截取的form图：

实际运行的窗体：


代码：

private static ChromiumWebBrowser browser = new ChromiumWebBrowser("http://www.baidu.com");

private void Form2_Load(object sender, EventArgs e)
        {
            browser.FrameLoadEnd += new EventHandler<FrameLoadEndEventArgs>(browser_FrameLoadEnd);
            browser.Visible = true;
            browser.Dock = DockStyle.Fill;
            groupBox1.Controls.Add(browser);
        }
private void browser_FrameLoadEnd(object obj, EventArgs e)
        {
            int width = this.Width;
            int height = this.Height;
            Bitmap bitmap = new Bitmap(width, height);  // 创建画布大小
            Rectangle rectangle = new Rectangle(0, 0, width, height);  // 绘图区域
            browser.DrawToBitmap(bitmap, rectangle);
            bitmap.Save("D:\\test.jpg", System.Drawing.Imaging.ImageFormat.Jpeg);
        }

[qq_36434521]

大神在哪QWQ

[qq_36434521]

GG.........

[班门弄武]

private void button1_Click(object sender, EventArgs e) { Graphics g = this.CreateGraphics(); Size s = this.Size; Bitmap image = new Bitmap(s.Width, s.Height, g); Graphics g2 = Graphics.FromImage(image); g2.CopyFromScreen(this.Location.X, this.Location.Y, 0, 0, s); g2.DrawImage(image, 0, 0); image.Save("a.jpg"); }

[qq_36434521]

引用 4 楼 myheadachecase 的回复:

private void button1_Click(object sender, EventArgs e) { Graphics g = this.CreateGraphics(); Size s = this.Size; Bitmap image = new Bitmap(s.Width, s.Height, g); Graphics g2 = Graphics.FromImage(image); g2.CopyFromScreen(this.Location.X, this.Location.Y, 0, 0, s); g2.DrawImage(image, 0, 0); image.Save("a.jpg"); }

我需要控件在不可见的情况下对网页进行截图，这个实现不了的

[班门弄武]

引用 5 楼 qq_36434521 的回复:

我需要控件在不可见的情况下对网页进行截图，这个实现不了的

好的，搞出来后通知一声。

[qq_36434521]

这么大的论坛没有懂的吗

[qaz6908768]

browser.Visible=true提到前面去试试，另外截图方法用点击事件调试比较好点吧

[a472544436]

实话说，cefsharp是不让你截图的，截毛线。

[gw6328]

没加载完你就切图，肯定是空白，你停过几秒再切看。

[datafansbj]

引用 5 楼 qq_36434521 的回复:

[quote=引用 4 楼 myheadachecase 的回复:] private void button1_Click(object sender, EventArgs e) { Graphics g = this.CreateGraphics(); Size s = this.Size; Bitmap image = new Bitmap(s.Width, s.Height, g); Graphics g2 = Graphics.FromImage(image); g2.CopyFromScreen(this.Location.X, this.Location.Y, 0, 0, s); g2.DrawImage(image, 0, 0); image.Save("a.jpg"); }

我需要控件在不可见的情况下对网页进行截图，这个实现不了的[/quote] 没整明白，控件不可见？那个控件不可见？是浏览器控件不可见吗？不可见又怎么截图啊？

[desperaso]

webBrowser 转图片

class NativeMethods
{
[ComImport]
[Guid("0000010D-0000-0000-C000-000000000046")]
[InterfaceType(ComInterfaceType.InterfaceIsIUnknown)]
interface IViewObject
{
void Draw([MarshalAs(UnmanagedType.U4)] uint dwAspect, int lindex, IntPtr pvAspect, [In] IntPtr ptd, IntPtr hdcTargetDev, IntPtr hdcDraw, [MarshalAs(UnmanagedType.Struct)] ref RECT lprcBounds, [In] IntPtr lprcWBounds, IntPtr pfnContinue, [MarshalAs(UnmanagedType.U4)] uint dwContinue);
}

[StructLayout(LayoutKind.Sequential, Pack = 4)]
struct RECT
{
public int Left;
public int Top;
public int Right;
public int Bottom;
}

public static void GetImage(object obj, Image destination, Color backgroundColor)
{
using (Graphics graphics = Graphics.FromImage(destination))
{
IntPtr deviceContextHandle = IntPtr.Zero;
RECT rectangle = new RECT();

rectangle.Right = destination.Width;
rectangle.Bottom = destination.Height;

graphics.Clear(backgroundColor);

try
{
deviceContextHandle = graphics.GetHdc();

IViewObject viewObject = obj as IViewObject;
viewObject.Draw(1, -1, IntPtr.Zero, IntPtr.Zero, IntPtr.Zero, deviceContextHandle, ref rectangle, IntPtr.Zero, IntPtr.Zero, 0);
}
finally
{
if (deviceContextHandle != IntPtr.Zero)
{
graphics.ReleaseHdc(deviceContextHandle);
}
}
}
}
}

 

private void webBrowser1_DocumentCompleted(object sender, WebBrowserDocumentCompletedEventArgs e)
{

Bitmap screenshot = new Bitmap(webBrowser1.Width, webBrowser1.Height);
NativeMethods.GetImage(webBrowser1.ActiveXInstance, screenshot, Color.White);

// 保存图片
screenshot.Save(@"F:\h11.png");
}

[TsaiRyan]

Thank you : )