使用webBrowse把网页word等转换成图片

http://blog.csdn.net/zgke/article/details/3248497

使用

1. Bitmap MyImage = Test.GetControlScrollImage(new Uri(@"http://www.sina.com.cn"), 1024);
2. MyImage.Save(@"C:/1.BMP");
3. MyImage.Dispose();

使用到的类

1. using System;
2. using System.Collections.Generic;
3. using System.ComponentModel;
4. using System.Data;
5. using System.Drawing;
6. using System.Text;
7. using System.Windows.Forms;
8. using System.Drawing.Imaging;
9. using System.Runtime.InteropServices;
10. using System.Security;
11. namespace Print
12. {
13. public class Test
14. {
15. public static Bitmap GetHtmlImage(Uri UrlString,int Width)
16. {
17. WebBrowser MyControl = new WebBrowser();
18. MyControl.Size = new Size(Width, 10);
19. MyControl.Url = UrlString;
20. while (MyControl.ReadyState != WebBrowserReadyState.Complete)
21. {
22. Application.DoEvents();
23. }
24. MyControl.Height= MyControl.Document.Body.ScrollRectangle.Height+20;
25. MyControl.Url = UrlString;
26. WebControlImage.Snapshot snap = new WebControlImage.Snapshot();
27. Bitmap MyImage= snap.TakeSnapshot(MyControl.ActiveXInstance, new Rectangle(0, 0, MyControl.Width, MyControl.Height));
28. MyControl.Dispose();
29. return MyImage;
30. }
31. /// <summary>
32. /// WebBrowser获取图形
33. /// </summary>
34. private class WebControlImage
35. {
36. internal static class NativeMethods
37. {
38. [StructLayout(LayoutKind.Sequential)]
39. public sealed class tagDVTARGETDEVICE
40. {
41. [MarshalAs(UnmanagedType.U4)]
42. public int tdSize;
43. [MarshalAs(UnmanagedType.U2)]
44. public short tdDriverNameOffset;
45. [MarshalAs(UnmanagedType.U2)]
46. public short tdDeviceNameOffset;
47. [MarshalAs(UnmanagedType.U2)]
48. public short tdPortNameOffset;
49. [MarshalAs(UnmanagedType.U2)]
50. public short tdExtDevmodeOffset;
51. }
52. [StructLayout(LayoutKind.Sequential)]
53. public class COMRECT
54. {
55. public int left;
56. public int top;
57. public int right;
58. public int bottom;
59. public COMRECT()
60. {
61. }
62. public COMRECT(Rectangle r)
63. {
64. this.left = r.X;
65. this.top = r.Y;
66. this.right = r.Right;
67. this.bottom = r.Bottom;
68. }
69. public COMRECT(int left, int top, int right, int bottom)
70. {
71. this.left = left;
72. this.top = top;
73. this.right = right;
74. this.bottom = bottom;
75. }
76. public static NativeMethods.COMRECT FromXYWH(int x, int y, int width, int height)
77. {
78. return new NativeMethods.COMRECT(x, y, x + width, y + height);
79. }
80. public override string ToString()
81. {
82. return string.Concat(new object[] { "Left = ", this.left, " Top ", this.top, " Right = ", this.right, " Bottom = ", this.bottom });
83. }
84. }
85. [StructLayout(LayoutKind.Sequential)]
86. public sealed class tagLOGPALETTE
87. {
88. [MarshalAs(UnmanagedType.U2)]
89. public short palVersion;
90. [MarshalAs(UnmanagedType.U2)]
91. public short palNumEntries;
92. }
93. }
94. public class Snapshot
95. {
96. /// <summary>
97. /// 取快照
98. /// </summary>
99. /// <param name="pUnknown">Com 对象</param>
100. /// <param name="bmpRect">图象大小</param>
101. /// <returns></returns>
102. public Bitmap TakeSnapshot(object pUnknown, Rectangle bmpRect)
103. {
104. if (pUnknown == null)
105. return null;
106. //必须为com对象
107. if (!Marshal.IsComObject(pUnknown))
108. return null;
109. //IViewObject 接口
110. UnsafeNativeMethods.IViewObject ViewObject = null;
111. IntPtr pViewObject = IntPtr.Zero;
112. //内存图
113. Bitmap pPicture = new Bitmap(bmpRect.Width, bmpRect.Height);
114. Graphics hDrawDC = Graphics.FromImage(pPicture);
115. //获取接口
116. object hret = Marshal.QueryInterface(Marshal.GetIUnknownForObject(pUnknown),
117. ref UnsafeNativeMethods.IID_IViewObject, out pViewObject);
118. try
119. {
120. ViewObject = Marshal.GetTypedObjectForIUnknown(pViewObject, typeof(UnsafeNativeMethods.IViewObject)) as UnsafeNativeMethods.IViewObject;
121. //调用Draw方法
122. ViewObject.Draw((int)System.Runtime.InteropServices.ComTypes.DVASPECT.DVASPECT_CONTENT,
123. -1,
124. IntPtr.Zero,
125. null,
126. IntPtr.Zero,
127. hDrawDC.GetHdc(),
128. new NativeMethods.COMRECT(bmpRect),
129. null,
130. IntPtr.Zero,
131. 0);
132. }
133. catch (Exception ex)
134. {
135. Console.WriteLine(ex.Message);
136. throw ex;
137. }
138. //释放
139. hDrawDC.Dispose();
140. return pPicture;
141. }
142. }
143. [SuppressUnmanagedCodeSecurity]
144. internal static class UnsafeNativeMethods
145. {
146. public static Guid IID_IViewObject = new Guid("{0000010d-0000-0000-C000-000000000046}");
147. [ComImport, Guid("0000010d-0000-0000-C000-000000000046"), InterfaceType(ComInterfaceType.InterfaceIsIUnknown)]
148. public interface IViewObject
149. {
150. [PreserveSig]
151. 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);
152. [PreserveSig]
153. int GetColorSet([In, MarshalAs(UnmanagedType.U4)] int dwDrawAspect, int lindex, IntPtr pvAspect, [In] NativeMethods.tagDVTARGETDEVICE ptd, IntPtr hicTargetDev, [Out] NativeMethods.tagLOGPALETTE ppColorSet);
154. [PreserveSig]
155. int Freeze([In, MarshalAs(UnmanagedType.U4)] int dwDrawAspect, int lindex, IntPtr pvAspect, [Out] IntPtr pdwFreeze);
156. [PreserveSig]
157. int Unfreeze([In, MarshalAs(UnmanagedType.U4)] int dwFreeze);
158. void SetAdvise([In, MarshalAs(UnmanagedType.U4)] int aspects, [In, MarshalAs(UnmanagedType.U4)] int advf, [In, MarshalAs(UnmanagedType.Interface)] System.Runtime.InteropServices.ComTypes.IAdviseSink pAdvSink);
159. 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.IAdviseSink[] pAdvSink);
160. }
161. }
162. }
163. }
164. }