C#导出数据到Excel文件的方法

/// <summary>/// 导出到Excel类，项目需引用Microsodt.Office.Interop.Excel,/// 类文件需using System.Data与System.Windows.Forms命名空间/// </summary>public class CToExcel{  /// <summary>  /// 导出到Excel  /// </summary>  /// <param name="fileName">默认文件名</param>  /// <param name="listView">数据源，一个页面上的ListView控件</param>  /// <param name="titleRowCount">标题占据的行数，为0表示无标题</param>  public void ExportExcel(string fileName, System.Windows.Forms.ListView listView,int titleRowCount)  {   string saveFileName = "";   //bool fileSaved = false;   SaveFileDialog saveDialog = new SaveFileDialog();   saveDialog.DefaultExt = "xls";   saveDialog.Filter = "Excel文件|*.xls";   saveDialog.FileName = fileName;   saveDialog.ShowDialog();   saveFileName = saveDialog.FileName;   if (saveFileName.IndexOf(":") < 0) return; //被点了取消    Microsoft.Office.Interop.Excel.Application xlApp;   try   {    xlApp = new Microsoft.Office.Interop.Excel.Application();   }   catch (Exception)   {    MessageBox.Show("无法创建Excel对象，可能您的机子未安装Excel");    return;   }   finally   {   }   Microsoft.Office.Interop.Excel.Workbooks workbooks = xlApp.Workbooks;   Microsoft.Office.Interop.Excel.Workbook workbook = workbooks.Add(Microsoft.Office.Interop.Excel.XlWBATemplate.xlWBATWorksheet);   Microsoft.Office.Interop.Excel.Worksheet worksheet = (Microsoft.Office.Interop.Excel.Worksheet)workbook.Worksheets[1];//取得sheet1   //写Title   if(titleRowCount!=0)    MergeCells(worksheet, 1, 1, titleRowCount, listView.Columns.Count, listView.Tag.ToString());   //写入列标题   for (int i = 0; i <= listView.Columns.Count - 1; i++)   {    worksheet.Cells[titleRowCount+1, i + 1] = listView.Columns[i].Text;   }   //写入数值   for (int r = 0; r <= listView.Items.Count - 1; r++)   {    for (int i = 0; i <= listView.Columns.Count - 1; i++)    {     worksheet.Cells[r + titleRowCount+2, i + 1] = listView.Items[r].SubItems[i].Text;    }    System.Windows.Forms.Application.DoEvents();   }   worksheet.Columns.EntireColumn.AutoFit();//列宽自适应   //if (Microsoft.Office.Interop.cmbxType.Text != "Notification")   //{   // Excel.Range rg = worksheet.get_Range(worksheet.Cells[2, 2], worksheet.Cells[ds.Tables[0].Rows.Count + 1, 2]);   // rg.NumberFormat = "00000000";   //}   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    // if (fileSaved && System.IO.File.Exists(saveFileName)) System.Diagnostics.Process.Start(saveFileName); //打开EXCEL   MessageBox.Show(fileName + "导出到Excel成功", "提示", MessageBoxButtons.OK);  }  /// <summary>  /// DataTable导出到Excel  /// </summary>  /// <param name="fileName">默认的文件名</param>  /// <param name="dataTable">数据源,一个DataTable数据表</param>  /// <param name="titleRowCount">标题占据的行数，为0则表示无标题</param>  public void ExportExcel(string fileName,System.Data.DataTable dataTable,int titleRowCount)  {   string saveFileName = "";   //bool fileSaved = false;   SaveFileDialog saveDialog = new SaveFileDialog();   saveDialog.DefaultExt = "xls";   saveDialog.Filter = "Excel文件|*.xls";   saveDialog.FileName = fileName;   saveDialog.ShowDialog();   saveFileName = saveDialog.FileName;   if (saveFileName.IndexOf(":") < 0) return; //被点了取消    Microsoft.Office.Interop.Excel.Application xlApp;   try   {    xlApp = new Microsoft.Office.Interop.Excel.Application();   }   catch (Exception)   {    MessageBox.Show("无法创建Excel对象，可能您的机子未安装Excel");    return;   }   finally   {   }   Microsoft.Office.Interop.Excel.Workbooks workbooks = xlApp.Workbooks;   Microsoft.Office.Interop.Excel.Workbook workbook = workbooks.Add(Microsoft.Office.Interop.Excel.XlWBATemplate.xlWBATWorksheet);   Microsoft.Office.Interop.Excel.Worksheet worksheet = (Microsoft.Office.Interop.Excel.Worksheet)workbook.Worksheets[1];//取得sheet1   //写Title   if(titleRowCount!=0)    MergeCells(worksheet, 1, 1, titleRowCount, dataTable.Columns.Count, dataTable.TableName);   //写入列标题   for (int i = 0; i <= dataTable.Columns.Count - 1; i++)   {    worksheet.Cells[titleRowCount+1, i + 1] = dataTable.Columns[i].ColumnName;   }   //写入数值   for (int r = 0; r <= dataTable.Rows.Count - 1; r++)   {    for (int i = 0; i <= dataTable.Columns.Count - 1; i++)    {     worksheet.Cells[r +titleRowCount+ 2, i + 1] = dataTable.Rows[r][i].ToString();    }    System.Windows.Forms.Application.DoEvents();   }   worksheet.Columns.EntireColumn.AutoFit();//列宽自适应   //if (Microsoft.Office.Interop.cmbxType.Text != "Notification")   //{   // Excel.Range rg = worksheet.get_Range(worksheet.Cells[2, 2], worksheet.Cells[ds.Tables[0].Rows.Count + 1, 2]);   // rg.NumberFormat = "00000000";   //}   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    // if (fileSaved && System.IO.File.Exists(saveFileName)) System.Diagnostics.Process.Start(saveFileName); //打开EXCEL   MessageBox.Show(fileName + "导出到Excel成功", "提示", MessageBoxButtons.OK);  }  /// <summary>   /// 合并单元格，并赋值，对指定WorkSheet操作   /// </summary>   /// <param name="sheetIndex">WorkSheet索引</param>   /// <param name="beginRowIndex">开始行索引</param>   /// <param name="beginColumnIndex">开始列索引</param>   /// <param name="endRowIndex">结束行索引</param>   /// <param name="endColumnIndex">结束列索引</param>   /// <param name="text">合并后Range的值</param>   public void MergeCells(Microsoft.Office.Interop.Excel.Worksheet workSheet, int beginRowIndex, int beginColumnIndex, int endRowIndex, int endColumnIndex, string text)  {   Microsoft.Office.Interop.Excel.Range range = workSheet.get_Range(workSheet.Cells[beginRowIndex, beginColumnIndex], workSheet.Cells[endRowIndex, endColumnIndex]);   range.ClearContents(); //先把Range内容清除，合并才不会出错    range.MergeCells = true;   range.Value2 = text;   range.HorizontalAlignment = Microsoft.Office.Interop.Excel.XlHAlign.xlHAlignCenter;   range.VerticalAlignment = Microsoft.Office.Interop.Excel.XlVAlign.xlVAlignCenter;  } }