.NET的Clipboard.GetData(DataFormats.Html)方法有BUG。 网上查询了一下，有个解决方法，不过那个网站被封了（至少我这没法访问） 用某软件上去看了一下，照做，OK了
using System; using System.Text; using System.Diagnostics; using System.Windows.Forms; using System.Runtime.InteropServices; using System.Runtime.InteropServices.ComTypes; namespace JX { /**//// <summary> /// By JX /// Version 1.0.200511041900 /// This static class contains a method to extract Dataformat.Html data from a IDataObject /// obtained from the Clipboard or a Drag and Drop operation. /// The method overcomes the UTF8 corruption problem encountered in .NET Framework version 2.0.50727.42 /// Version 1.0 of the Dataformat.Html data has a header like this: /// /// Version:1.0 /// StartHTML:000000238 /// EndHTML:000000546 /// StartFragment:000000353 /// EndFragment:000000510 /// StartSelection:000000353 /// EndSelection:000000510 /// /// The values refer to the BYTES of the string not the actual chars /// </summary> static class HtmlFromIDataObject { /**//// <summary> /// Extracts data of type Dataformat.Html from an IdataObject data container /// This method shouldn't throw any exception but writes relevant exception informations in the debug window /// </summary> /// <param name="data">IdataObject data container</param> /// <returns>A byte[] array with the decoded string or null if the method fails</returns> public static byte[] GetHtml(System.Windows.Forms.IDataObject data) { System.Runtime.InteropServices.ComTypes.IDataObject interopData = data as System.Runtime.InteropServices.ComTypes.IDataObject; FORMATETC format = new FORMATETC(); format.cfFormat = (short)DataFormats.GetFormat(DataFormats.Html).Id; format.dwAspect = DVASPECT.DVASPECT_CONTENT; format.lindex = -1; format.tymed = TYMED.TYMED_HGLOBAL; STGMEDIUM stgmedium = new STGMEDIUM(); stgmedium.tymed = TYMED.TYMED_HGLOBAL; stgmedium.pUnkForRelease = null; int queryResult = 0; try { queryResult = interopData.QueryGetData(ref format); } catch (Exception exp) { Debug.WriteLine("HtmlFromIDataObject.GetHtml -> QueryGetData(ref format) threw an exception: " + Environment.NewLine + exp.ToString()); return null; } if (queryResult != 0) { Debug.WriteLine("HtmlFromIDataObject.GetHtml -> QueryGetData(ref format) returned a code != 0 code: " + queryResult.ToString()); return null; } try { interopData.GetData(ref format, out stgmedium); } catch (Exception exp) { System.Diagnostics.Debug.WriteLine("HtmlFromIDataObject.GetHtml -> GetData(ref format, out stgmedium) threw this exception: " + Environment.NewLine + exp.ToString()); return null; } if (stgmedium.unionmember == IntPtr.Zero) { Debug.WriteLine("HtmlFromIDataObject.GetHtml -> stgmedium.unionmember returned an IntPtr pointing to zero"); return null; } IntPtr pointer = stgmedium.unionmember; HandleRef handleRef = new HandleRef(null, pointer); byte[] rawArray = null; try { IntPtr ptr1 = GlobalLock(handleRef); int length = GlobalSize(handleRef); rawArray = new byte[length]; Marshal.Copy(ptr1, rawArray, 0, length); } catch (Exception exp) { Debug.WriteLine("HtmlFromIDataObject.GetHtml -> Html Import threw an exception: " + Environment.NewLine + exp.ToString()); } finally { GlobalUnlock(handleRef); } return rawArray; } [DllImport("kernel32.dll", CharSet = CharSet.Auto, ExactSpelling = true, SetLastError = true)] private static extern IntPtr GlobalLock(HandleRef handle); [DllImport("kernel32.dll", CharSet = CharSet.Auto, ExactSpelling = true, SetLastError = true)] private static extern bool GlobalUnlock(HandleRef handle); [DllImport("kernel32.dll", CharSet = CharSet.Auto, ExactSpelling = true, SetLastError = true)] private static extern int GlobalSize(HandleRef handle); }} byte [] rawHtmlBytes = JX.HtmlFromIDataObject.GetHtml(dataObject) string rawHtml = Encoding.UTF8.GetString(rawHtmlBytes); 原文地址：http://bakamachine.blogspot.com/2006/05/workarond-for-dataobject-html.html转载于:https://www.cnblogs.com/yushiro/archive/2007/09/15/894080.html
