public enum ClipboardFormats : uint    {        CF_TEXT = 1,        CF_BITMAP = 2,        CF_METAFILEPICT = 3,        CF_SYLK = 4,        CF_DIF = 5,        CF_TIFF = 6,        CF_OEMTEXT = 7,        CF_DIB = 8,        CF_PALETTE = 9,        CF_PENDATA = 10,        CF_RIFF = 11,        CF_WAVE = 12,        CF_UNICODETEXT = 13,        CF_ENHMETAFILE = 14    }public class ClipboardUtility{    [DllImport("user32.dll")]    private static extern bool OpenClipboard(IntPtr hWndNewOwner);    [DllImport("user32.dll")]    private static extern bool EmptyClipboard();    [DllImport("user32.dll")]    private static extern IntPtr GetClipboardData(uint uFormat);    [DllImport("user32.dll")]    private static extern IntPtr SetClipboardData(uint uFormat, IntPtr hMem);    [DllImport("user32.dll")]    private static extern bool CloseClipboard();    [DllImport("kernel32.dll")]    private static extern UIntPtr GlobalSize(IntPtr hMem);        public static void SetClipboardText(string text, Encoding encoding)    {        byte[] bytes = encoding.GetBytes(text);        IntPtr alloc = Marshal.AllocHGlobal(bytes.Length + 1);        Marshal.Copy(bytes, 0, alloc, bytes.Length);        OpenClipboard(IntPtr.Zero);        EmptyClipboard();        SetClipboardData((uint)ClipboardFormats.CF_TEXT, alloc);        CloseClipboard();    }    public static string GetClipboardText(Encoding encoding)    {        OpenClipboard(IntPtr.Zero);        IntPtr alloc = GetClipboardData((uint)ClipboardFormats.CF_TEXT);        byte[] bytes = new byte[(int)GlobalSize(alloc)];        Marshal.Copy(alloc, bytes, 0, bytes.Length);        CloseClipboard();        return encoding.GetString(bytes);    }    [STAThread]    public static void clear()    {        Clipboard.Clear();    }} public bool CreateExcelFileForDataTable()    {            Excel.Application app = new Excel.Application();            app.Visible = true;//让Excel显示（调试用）            Excel.Workbooks ws = app.Workbooks;            Excel.Workbook workbook = ws.Add(Excel.XlWBATemplate.xlWBATWorksheet);  // 默认已经创建了一个worksheet            int sheetCount = 2;//Excel页数                workbook.Sheets.Add(Type.Missing, workbook.Sheets[1], sheetCount, Type.Missing);            List
     
       list = new List
      
       ();            StringBuilder sb = new StringBuilder();            sb.Append(@"
       
        
         
          
           
            WT
           
          
           
            WT
           
         
         
          
           
            WT
           
          
           
            WT
           
         
        
       
");            list.Add(sb);            list.Add(sb);            list.Add(sb);            for (int i = 1; i <= workbook.Sheets.Count; i++)            {                Excel.Worksheet worksheet = (Excel.Worksheet)workbook.Worksheets[i];  //得到worksheet                worksheet.Name = "第" + i.ToString() + "个Sheet";// 为worksheet设置名字                ClipboardUtility.SetClipboardText(list[i - 1].ToString(),Encoding.Default);//用默认编码设置剪贴板内容                worksheet.Paste();//从剪贴板粘贴到Excel中。                worksheet.Columns.EntireColumn.AutoFit();  //自动适应长度            }            //如果Excel不显示，记得最后要关闭Excel，不然会开很多在内存。ws.Close();        app.Quit();        System.Runtime.InteropServices.Marshal.ReleaseComObject(worksheet);        worksheet = null;        System.Runtime.InteropServices.Marshal.ReleaseComObject(workbook);        workbook = null;        System.Runtime.InteropServices.Marshal.ReleaseComObject(ws);        ws = null;        System.Runtime.InteropServices.Marshal.ReleaseComObject(app);        app = null;return true;}