C# DataTable数据导入Excel数据【经过本人测试修改】

  
    

   
     /*
   
     *******************************************************
 * 如果引用->添加引用->.net选项卡下有->using Microsoft.Office.Interop.Excel;->直接引入
 * 如果没有，请把->Microsoft.Office.Interop.Excel.dll->放到Debug目录下->
 * 引用->添加引用->浏览选项卡下有->using Microsoft.Office.Interop.Excel;->直接引入
 * 然后再类的上边添加using Microsoft.Office.Interop.Excel;
 * 
 * 
 * *****************************************************
   
     */
   
     

   
     using
   
      System;

   
     using
   
      System.Collections.Generic;

   
     using
   
      System.Text;

   
     using
   
      Microsoft.Office.Interop.Excel;

   
     using
   
      System.Windows.Forms;


   
     namespace
   
      DataGridviewPage
{
 
   
     class
   
      ExcleHelper
 {

 
   
     ///
   
      
   
     <summary>
   
     
 
   
     ///
   
      
 
   
     ///
   
      
   
     </summary>
   
     
 
   
     ///
   
      
   
     <param name="dt">
   
     需要导出到excel的数据表dt
   
     </param>
   
     
 
   
     ///
   
      
   
     <param name="saveFileName">
   
     存储文件名
   
     </param>
   
     
 
   
     ///
   
      
   
     <returns></returns>
   
     

   
      
   
     public
   
      
   
     static
   
      
   
     void
   
      DataTableToExcel(System.Data.DataTable dt, 
   
     string
   
      saveFileName)
 {
 
   
     if
   
      (dt 
   
     ==
   
      
   
     null
   
     ) 
   
     return
   
     ;
 
   
     //
   
     -***************获取excel对象***************
 
   
     //
   
      string saveFileName = "";
   
     

   
      TimeSpan dateBegin 
   
     =
   
      
   
     new
   
      TimeSpan(DateTime.Now.Ticks);
 
   
     bool
   
      fileSaved 
   
     =
   
      
   
     false
   
     ;
 SaveFileDialog saveDialog 
   
     =
   
      
   
     new
   
      SaveFileDialog();
 saveDialog.DefaultExt 
   
     =
   
      
   
     "
   
     xls
   
     "
   
     ;
 saveDialog.Filter 
   
     =
   
      
   
     "
   
     Excel文件|*.xls
   
     "
   
     ;
 saveDialog.FileName 
   
     =
   
      
   
     "
   
     导入记录查询结果 
   
     "
   
      
   
     +
   
      DateTime.Today.ToString(
   
     "
   
     yyyy-MM-dd
   
     "
   
     );
 saveDialog.ShowDialog();
 saveFileName 
   
     =
   
      saveDialog.FileName;
 
   
     if
   
      (saveFileName.IndexOf(
   
     "
   
     :
   
     "
   
     ) 
   
     <
   
      
   
     0
   
     ) 
   
     return
   
     ; 
   
     //
   
     被点了取消
   
     

   
      Microsoft.Office.Interop.Excel.Application xlApp 
   
     =
   
      
   
     new
   
      Microsoft.Office.Interop.Excel.Application();
 
   
     if
   
      (xlApp 
   
     ==
   
      
   
     null
   
     )
 {
 MessageBox.Show(
   
     "
   
     无法启动Excel，可能您未安装Excel
   
     "
   
     );
 
   
     return
   
     ;
 }
 Microsoft.Office.Interop.Excel.Workbook workbook 
   
     =
   
      xlApp.Workbooks.Add(
   
     true
   
     );
 Microsoft.Office.Interop.Excel.Worksheet worksheet 
   
     =
   
      (Microsoft.Office.Interop.Excel.Worksheet)workbook.Worksheets[
   
     1
   
     ];
 Microsoft.Office.Interop.Excel.Range range;


 
 
   
     //
   
      列索引，行索引，总列数，总行数 
   
     

   
      
   
     int
   
      colIndex 
   
     =
   
      
   
     0
   
     ;
 
   
     int
   
      RowIndex 
   
     =
   
      
   
     0
   
     ;
 
   
     int
   
      colCount 
   
     =
   
      dt.Columns.Count;
 
   
     int
   
      RowCount 
   
     =
   
      dt.Rows.Count;


 
   
     //
   
      *****************获取数据*********************

 
   
     //
   
      创建缓存数据
   
     

   
      
   
     object
   
     [,] objData 
   
     =
   
      
   
     new
   
      
   
     object
   
     [RowCount
   
     +
   
     1
   
     , colCount];
 
   
     //
   
      获取列标题
   
     

   
      
   
     for
   
      (
   
     int
   
      i 
   
     =
   
      
   
     0
   
     ; i 
   
     <
   
      dt.Columns.Count; i
   
     ++
   
     )
 {
 objData[RowIndex, colIndex
   
     ++
   
     ] 
   
     =
   
      dt.Columns[i].Caption; 
   
     //
   
      dgv.Columns[i].HeaderText;
   
     

   
      }

 
   
     //
   
      获取具体数据
   
     

   
      
   
     for
   
      (RowIndex 
   
     =
   
      
   
     0
   
     ; RowIndex 
   
     <
   
      RowCount; RowIndex
   
     ++
   
     )
 {
 
   
     for
   
      (colIndex 
   
     =
   
      
   
     0
   
     ; colIndex 
   
     <
   
      colCount; colIndex
   
     ++
   
     )
 {
 objData[RowIndex
   
     +
   
     1
   
     , colIndex] 
   
     =
   
      dt.Rows[RowIndex][colIndex];
 }

 }


 
   
     //
   
     *******************设置输出格式******************************

 
   
     //
   
     设置顶部説明 合并的单元格
   
     

   
      range 
   
     =
   
      worksheet.get_Range(xlApp.Cells[
   
     1
   
     , 
   
     1
   
     ], xlApp.Cells[
   
     1
   
     , colCount]);
 range.MergeCells 
   
     =
   
      
   
     true
   
     ;
 range.RowHeight 
   
     =
   
      
   
     38
   
     ;
 range.Font.Bold 
   
     =
   
      
   
     true
   
     ;
 range.Font.Size 
   
     =
   
      
   
     14
   
     ;
 range.Font.ColorIndex 
   
     =
   
      
   
     10
   
     ;
   
     //
   
     字体颜色
   
     

   
      xlApp.ActiveCell.FormulaR1C1 
   
     =
   
      
   
     "
   
     导入记录查询结果
   
     "
   
     ;

 
   
     //
   
     特殊数字格式
 
   
     //
   
     range = worksheet.get_Range(xlApp.Cells[2, colCount], xlApp.Cells[RowCount, colCount]);
   
     

   
     

 xlApp.Cells.HorizontalAlignment 
   
     =
   
      Microsoft.Office.Interop.Excel.Constants.xlCenter;
 range 
   
     =
   
      worksheet.get_Range(xlApp.Cells[
   
     2
   
     , 
   
     1
   
     ], xlApp.Cells[
   
     2
   
     , colCount]);

 range.Font.Bold 
   
     =
   
      
   
     true
   
     ;
 range.RowHeight 
   
     =
   
      
   
     20
   
     ;


 
   
     //
   
     ********************* 写入Excel*******************
   
     

   
     
 range 
   
     =
   
      worksheet.get_Range(xlApp.Cells[
   
     2
   
     , 
   
     1
   
     ], xlApp.Cells[RowCount
   
     +
   
     2
   
     , colCount]);
 range.Value2 
   
     =
   
      objData;
 System.Windows.Forms.Application.DoEvents();

 
   
     //
   
     ***************************保存**********************
   
     

   
     
 
   
     if
   
      (saveFileName 
   
     !=
   
      
   
     ""
   
     )
 {
 
   
     try
   
     
 {
 workbook.Saved 
   
     =
   
      
   
     true
   
     ;
 workbook.SaveCopyAs(saveFileName);
 fileSaved 
   
     =
   
      
   
     true
   
     ;
 }
 
   
     catch
   
      (Exception ex)
 {
 fileSaved 
   
     =
   
      
   
     false
   
     ;
 MessageBox.Show(
   
     "
   
     导出文件时出错,文件可能正被打开！\n
   
     "
   
      
   
     +
   
      ex.Message);
 }
 }
 
   
     else
   
     
 {
 fileSaved 
   
     =
   
      
   
     false
   
     ;
 }
 xlApp.Quit();
 GC.Collect();
   
     //
   
     强行销毁 
   
     

   
     
 TimeSpan dateEnd 
   
     =
   
      
   
     new
   
      TimeSpan(DateTime.Now.Ticks);
 TimeSpan tspan 
   
     =
   
      dateBegin.Subtract(dateEnd).Duration();
 MessageBox.Show(
   
     "
   
     导出成功，用时
   
     "
   
      
   
     +
   
      tspan.ToString() 
   
     +
   
      
   
     "
   
     秒
   
     "
   
     );
 
   
     if
   
      (fileSaved 
   
     &&
   
      System.IO.File.Exists(saveFileName))
 System.Diagnostics.Process.Start(saveFileName); 
   
     //
   
     保存成功后打开此文件
   
     

   
      }
 }

}