----------------------------------Web导出
导出时出现的问题：
1. 导出多条数据有问题；
2. 导出多条数据没有问题，但在导出单条数据时有问题；
3. 导出乱码，个别电脑导出韩文；
分析： 可能跟客户端的数据编码有关。 导出方法经过不下10个版本的修正；
比较好的一篇文章是：http://www.cnblogs.com/top5/archive/2010/02/16/1668801.html
我只取了一种方法，方法如下：
/// <summary>
/// Web页面的EXCEL导出
/// </summary>
/// <param name="dt">需要导出的数据表</param>
///
public static void ExportExcel(DataTable dt, string code)
{
GridView gv1 = new GridView();
gv1.DataSource = dt;
gv1.DataBind();
string fileName = DateTime.Now.ToString("yyyyMMddHHmmss") + ".xls";
HttpContext.Current.Response.Clear();
HttpContext.Current.Response.Buffer = true;
HttpContext.Current.Response.Charset = code;
HttpContext.Current.Response.AppendHeader("Content-Disposition", "attachment;filename=" + HttpUtility.UrlEncode(fileName, System.Text.Encoding.GetEncoding(code)));
HttpContext.Current.Response.ContentEncoding = System.Text.Encoding.GetEncoding(code);
HttpContext.Current.Response.ContentType = "application/vnd.ms-excel";
StringWriter sw = new StringWriter();
HtmlTextWriter htw = new HtmlTextWriter(sw);
gv1.RenderControl(htw);
HttpContext.Current.Response.Write("<html><head><meta http-equiv=Content-Type content="text/html; charset=" + code + ""></head><body>");
HttpContext.Current.Response.Write(sw.ToString());
HttpContext.Current.Response.Write("</body></html>");
HttpContext.Current.Response.End();
}
-------------------------------------Windows导出
public static void CreateXls(string FileAddr, DateTime date, System.Data.DataTable dt) { Application oExcel = new Microsoft.Office.Interop.Excel.Application(); Workbooks oBooks; Workbook oBook; Sheets oSheets; Worksheet oSheet; Range oCells; string sFile = "", sTemplate = ""; sFile = string.Format(FileAddr + date.GetYYYYMMDD() + "\NG_Cash_{0}.xlsx", date.GetYYYYMMDD()); sTemplate = FileAddr + "CashFileTemplate.xlsx"; if (!System.IO.File.Exists(sTemplate)) { System.IO.File.Create(sTemplate); } // oExcel.Visible = false; oExcel.DisplayAlerts = false; //// 定义一个新的工作簿 oBooks = oExcel.Workbooks; oBooks.Open(sTemplate, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing); oBook = oBooks.get_Item(1); oSheets = oBook.Worksheets; oSheet = (Worksheet)oSheets.get_Item(1); // 命名该sheet //oSheet.Name = "CashRecords"; oCells = oSheet.Cells; //调用 dumpdata过程，将数据导入到Excel中去 DumpData(dt, oCells); ////保存 //oSheet.SaveAs(sFile, Microsoft.Office.Interop.Excel.XlFileFormat.xlTemplate, Type.Missing, Type.Missing, Type.Missing, //Type.Missing, Microsoft.Office.Interop.Excel.XlSaveAsAccessMode.xlNoChange, Type.Missing, Type.Missing, Type.Missing); oBook.SaveCopyAs(sFile); oBook.Close(false, Type.Missing, Type.Missing); //退出Excel，并且释放调用的COM资源 oExcel.Quit(); GC.Collect(); KillProcess("Excel"); } private static void DumpData(System.Data.DataTable dt, Microsoft.Office.Interop.Excel.Range oCells) { DataRow dr; object[] ary; int iRow; int iCol; ////import the fields' name //for (iCol = 0; iCol <= dt.Columns.Count - 1; iCol++) //{ // oCells[2, iCol + 1] = dt.Columns[iCol].ToString(); //} //import the values for (iRow = 0; iRow <= dt.Rows.Count - 1; iRow++) { dr = dt.Rows[iRow]; ary = dr.ItemArray; oCells[iRow + 2, 1] = "PSHK"; oCells[iRow + 2, 2] = DateTime.Parse( ary[2].ToString()).ToString("yyyy-MM-dd"); oCells[iRow + 2, 3] = DateTime.Parse(ary[2].ToString()).ToString("yyyy-MM-dd"); oCells[iRow + 2, 4] = DateTime.Parse(ary[2].ToString()).ToString("yyyy-MM-dd"); oCells[iRow + 2, 5] = ary[1].ToString(); oCells[iRow + 2, 6] = "Cash"; double amount = double.Parse(ary[6].ToString()); CashFileData.eTransType TransType = CashFileData.GetTransType(ary[3].ToString()); if (TransType == CashFileData.eTransType.Exchange) { if (amount > 0) { oCells[iRow + 2, 7] = "Cash Transfer In"; } else { oCells[iRow + 2, 7] = "Cash Transfer Out"; } } else if (TransType == CashFileData.eTransType.CashIn) { oCells[iRow + 2, 7] = "Cash Transfer In"; } else { oCells[iRow + 2, 7] = "Cash Transfer Out"; } oCells[iRow + 2, 8] = ary[5].ToString(); oCells[iRow + 2, 9] = amount.ToString(); oCells[iRow + 2, 10] = ary[7].ToString(); //for (iCol = 0; iCol <= ary.GetLength(0) - 1; iCol++) //{ // oCells[iRow + 3, iCol + 1] = ary[iCol].ToString(); // //Response.Write(ary[iCol].ToString() + (char)9); // Console.Write(ary[iCol].ToString() + (char)9); //} } } private static void KillProcess(string processName) { System.Diagnostics.Process myproc = new System.Diagnostics.Process(); //得到所有打开的进程 try { foreach (Process thisproc in Process.GetProcessesByName(processName)) { if (!thisproc.CloseMainWindow()) { thisproc.Kill(); } } } catch (Exception Exc) { throw new Exception("", Exc); } }