asp.net利用剪切板导出excel

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<StringBuilder> list = new List<StringBuilder>();

            StringBuilder sb = new StringBuilder();

            sb.Append(@"<table align='center' border='0' cellpadding='2' cellspacing='0' width='100%'>

<tbody>

<tr>

<td style='color: #ff0000'><asp:Label ID='lblTX0' runat='Server' >WT</asp:Label><br /></td>

<td style='color: #ff0000'><asp:Label ID='lblTX0' runat='Server' >WT</asp:Label><br /></td>

</tr>

<tr>

<td style='color: #ff0000'><asp:Label ID='lblTX0' runat='Server' >WT</asp:Label><br /></td>

<td style='color: #ff0000'><asp:Label ID='lblTX0' runat='Server' >WT</asp:Label><br /></td>

</tr>

</tbody>

</table>");

            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;

}