C# 整个网页保存成图片

using System;using System.Collections.Generic;using System.ComponentModel;using System.Data;using System.Drawing;using System.Text;using System.Windows.Forms;using System.Drawing.Imaging;using System.Runtime.InteropServices;using System.Security;namespace Print {public class Test {public static Bitmap GetHtmlImage(Uri UrlString,int Width){WebBrowser MyControl = new WebBrowser();MyControl.Size = new Size(Width, 10);MyControl.Url = UrlString;while (MyControl.ReadyState != WebBrowserReadyState.Complete){Application.DoEvents();}　 MyControl.Height= MyControl.Document.Body.ScrollRectangle.Height+20;MyControl.Url = UrlString;WebControlImage.Snapshot snap = new WebControlImage.Snapshot();　 Bitmap MyImage= snap.TakeSnapshot(MyControl.ActiveXInstance, new Rectangle(0, 0, MyControl.Width, MyControl.Height));MyControl.Dispose();return MyImage;}////// WebBrowser获取图形///private class WebControlImage{internal static class NativeMethods{[StructLayout(LayoutKind.Sequential)]public sealed class tagDVTARGETDEVICE{[MarshalAs(UnmanagedType.U4)]public int tdSize;[MarshalAs(UnmanagedType.U2)]public short tdDriverNameOffset;[MarshalAs(UnmanagedType.U2)]public short tdDeviceNameOffset;[MarshalAs(UnmanagedType.U2)]public short tdPortNameOffset;[MarshalAs(UnmanagedType.U2)]public short tdExtDevmodeOffset;}[StructLayout(LayoutKind.Sequential)]public class COMRECT{public int left;public int top;public int right;public int bottom;public COMRECT(){}public COMRECT(Rectangle r){this.left = r.X;this.top = r.Y;this.right = r.Right;this.bottom = r.Bottom;}public COMRECT(int left, int top, int right, int bottom){this.left = left;this.top = top;this.right = right;this.bottom = bottom;}public static NativeMethods.COMRECT FromXYWH(int x, int y, int width, int height){return new NativeMethods.COMRECT(x, y, x + width, y + height);}public override string ToString(){return string.Concat(new object[] { “Left = “, this.left, ” Top “, this.top, ” Right = “, this.right, ” Bottom = “, this.bottom });}}[StructLayout(LayoutKind.Sequential)]public sealed class tagLOGPALETTE{[MarshalAs(UnmanagedType.U2)]public short palVersion;[MarshalAs(UnmanagedType.U2)]public short palNumEntries;}}public class Snapshot{////// ?煺?////// Com 对象/// 图象大小///public Bitmap TakeSnapshot(object pUnknown, Rectangle bmpRect){if (pUnknown == null)return null;//必须为com对象if (!Marshal.IsComObject(pUnknown))return null;//IViewObject 接口UnsafeNativeMethods.IViewObject ViewObject = null;IntPtr pViewObject = IntPtr.Zero;//内存图Bitmap pPicture = new Bitmap(bmpRect.Width, bmpRect.Height);Graphics hDrawDC = Graphics.FromImage(pPicture);//获取接口object hret = Marshal.QueryInterface(Marshal.GetIUnknownForObjec t(pUnknown),ref UnsafeNativeMethods.IID_IViewObject, out pViewObject);try{　 ViewObject = Marshal.GetTypedObjectForIUnknown(pViewObject, typeof(UnsafeNativeMethods.IViewObject)) as UnsafeNativeMethods.IViewObject;//调用Draw方法ViewObject.Draw((int)System.Runtime.InteropServices.ComTypes.DVASPECT. DVASPECT_CONTENT,-1,IntPtr.Zero,null,IntPtr.Zero,hDrawDC.GetHdc(),new NativeMethods.COMRECT(bmpRect),null,IntPtr.Zero,0);}catch (Exception ex){Console.WriteLine(ex.Message);throw ex;}//释放hDrawDC.Dispose();return pPicture;}}[SuppressUnmanagedCodeSecurity]internal static class UnsafeNativeMethods{public static Guid IID_IViewObject = new Guid(“{0000010d-0000-0000-C000-000000000046}”);[ComImport, Guid(“0000010d-0000-0000-C000-000000000046”), InterfaceType(ComInterfaceType.InterfaceIsIUnknown )]public interface IViewObject{[PreserveSig]　　int Draw([In, MarshalAs(UnmanagedType.U4)] int dwDrawAspect, int lindex, IntPtr pvAspect, [In] NativeMethods.tagDVTARGETDEVICE ptd, IntPtr hdcTargetDev, IntPtr hdcDraw, [In] NativeMethods.COMRECT lprcBounds, [In] NativeMethods.COMRECT lprcWBounds, IntPtr pfnContinue, [In] int dwContinue);[PreserveSig]　　int GetColorSet([In, MarshalAs(UnmanagedType.U4)] int dwDrawAspect, int lindex, IntPtr pvAspect, [In] NativeMethods.tagDVTARGETDEVICE ptd, IntPtr hicTargetDev, [Out] NativeMethods.tagLOGPALETTE ppColorSet);[PreserveSig]int Freeze([In, MarshalAs(UnmanagedType.U4)] int dwDrawAspect, int lindex, IntPtr pvAspect, [Out] IntPtr pdwFreeze);[PreserveSig]int Unfreeze([In, MarshalAs(UnmanagedType.U4)] int dwFreeze);　　void SetAdvise([In, MarshalAs(UnmanagedType.U4)] int aspects, [In, MarshalAs(UnmanagedType.U4)] int advf, [In, MarshalAs(UnmanagedType.Interface)] System.Runtime.InteropServices.ComTypes.IAdviseSin k pAdvSink);　　void GetAdvise([In, Out, MarshalAs(UnmanagedType.LPArray)] int[] paspects, [In, Out, MarshalAs(UnmanagedType.LPArray)] int[] advf, [In, Out, MarshalAs(UnmanagedType.LPArray)] System.Runtime.InteropServices.ComTypes.IAdviseSin k[] pAdvSink);}}}}}