C#导出数据到Excel文件的方法

本文实例讲述了C#导出数据到Excel文件的方法。分享给大家供大家参考。具体实现方法如下：

/// <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;
 }
}

希望本文所述对大家的C#程序设计有所帮助。