引入  Microsoft.Office.Interop.Excel.dll
 格式：标题加了下划线，单元格内容居中
 1 using System; 2 using System.Data; 3 using System.Data.SqlClient; 4 using System.Web.UI;     5  6      public static void DataSetToExcel(DataTable dataTable, string SaveFile)   7             {   8                 Microsoft.Office.Interop.Excel.Application excel;   9 10                 Microsoft.Office.Interop.Excel._Workbook workBook;  11 12                 Microsoft.Office.Interop.Excel._Worksheet workSheet;  13 14                 object misValue =http://www.mamicode.com/ System.Reflection.Missing.Value;  15 16                 excel = new Microsoft.Office.Interop.Excel.Application();17 18                 workBook = excel.Workbooks.Add(misValue);  19 20                 workSheet = (Microsoft.Office.Interop.Excel._Worksheet)workBook.ActiveSheet;  21 22                 int rowIndex = 1;  23 24                 int colIndex = 0;25                26                 //取得标题  27                 foreach (DataColumn col in dataTable.Columns)  28                 {  29                     colIndex++;  30 31                     excel.Cells[1, colIndex] = col.ColumnName;32                     Microsoft.Office.Interop.Excel.Range range = workSheet.Range[workSheet.Cells[1, colIndex],workSheet.Cells[1,colIndex]];33                     range.Font.Underline = true;34                 }35 36                 //取得表格中的数据  37                 foreach (DataRow row in dataTable.Rows)  38                 {  39                     rowIndex++;  40 41                     colIndex = 0;  42 43                     foreach (DataColumn col in dataTable.Columns)  44                     {  45                        colIndex++;  46 47                        excel.Cells[rowIndex, colIndex] =   48 49                             row[col.ColumnName].ToString().Trim();50 51                        Microsoft.Office.Interop.Excel.Range range = workSheet.Range[excel.Cells[rowIndex, colIndex], excel.Cells[rowIndex, colIndex]];52                        range.HorizontalAlignment = Microsoft.Office.Interop.Excel.XlVAlign.xlVAlignCenter;53                     }  54                 }  55 56                 excel.Visible = false;57                 excel.DisplayAlerts = false;58 59                 if (workSheet != null)60                 {61                     workBook.SaveAs(SaveFile, Microsoft.Office.Interop.Excel.XlFileFormat.xlWorkbookNormal, misValue,62 63                         misValue, misValue, misValue, Microsoft.Office.Interop.Excel.XlSaveAsAccessMode.xlExclusive,64 65                         misValue, misValue, misValue, misValue, misValue);66                 }67  68 69                 dataTable = null;  70 71                 workBook.Close(true, misValue, misValue);  72 73                 excel.Quit();  74 75 76                 releaseObject(workSheet);  77 78                 releaseObject(workBook);  79 80                 releaseObject(excel);  81 82             }  83 84             private static void releaseObject(object obj)  85             {  86                 try  87                 {  88                     System.Runtime.InteropServices.Marshal.ReleaseComObject(obj);  89                     obj = null;  90                 }  91                 catch  92                 {  93                     obj = null;  94                 }  95                 finally  96                 {  97                     GC.Collect();  98                 }  99             }

  DataSetToExcel(ds.Tables[0], @"D:\ZhaoNick\Desktop\test.xls");