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); } } } } }