C#使用winform简单导出Excel的方法

using Excel;

/// <summary>/// 导出Excel/// </summary>/// <param name="sender"></param>/// <param name="e"></param>private void btnExportExcel_Click(object sender, EventArgs e){  DataTable dt = this.dgvWaterTicket.DataSource;  if (dt == null)  {    return;  }  if (dt.Rows.Count == 0)  {    return;  }  Excel.Application xlApp = new Excel.Application();  if (xlApp == null)  {    MessageBox.Show("请确保您的电脑已经安装Excel", "提示信息", MessageBoxButtons.OK, MessageBoxIcon.Error);    return;  }  xlApp.UserControl = true;  Excel.Workbooks workbooks = xlApp.Workbooks;  //根据模版产生新的workbook //Workbook workbook = workbooks.Add("D://aa.xls");  Excel.Workbook workbook = workbooks.Add(Excel.XlWBATemplate.xlWBATWorksheet);  Excel.Worksheet worksheet = (Excel.Worksheet)workbook.Worksheets[1];//取得sheet1  if (worksheet == null)  {    MessageBox.Show("请确保您的电脑已经安装Excel", "提示信息", MessageBoxButtons.OK, MessageBoxIcon.Error);    return;  }  try  {    Excel.Range range;    long totalCount = dt.Rows.Count;    long rowRead = 0;    float percent = 0;    worksheet.Cells[1, 1] = frm.Text;//导出的标题    worksheet.get_Range(worksheet.Cells[1, 1], worksheet.Cells[1, dt.]).MergeCells = true; //合并单元格---列数    worksheet.get_Range(worksheet.Cells[1, 1], worksheet.Cells[1, 3]).HorizontalAlignment = Excel.XlVAlign.xlVAlignCenter;//居中对齐    worksheet.get_Range(worksheet.Cells[1, 3], worksheet.Cells[1, 3]).ColumnWidth = 15;   //列宽    worksheet.get_Range(worksheet.Cells[1, 2], worksheet.Cells[1, 2]).ColumnWidth = 15;   //列宽    worksheet.get_Range(worksheet.Cells[1, 1], worksheet.Cells[1, 1]).ColumnWidth = 20;   //列宽    //写入字段    for (int i = 0; i < dt.Columns.Count; i++)    {      worksheet.Cells[2, i + 1] = dt.Columns[i].ColumnName;      range = (Excel.Range)worksheet.Cells[2, i + 1];      range.Interior.ColorIndex = 15;      range.Font.Bold = true;    }    //写入数值    for (int r = 0; r < dt.Rows.Count; r++)    {      for (int i = 0; i < dt.Columns.Count; i++)      {        worksheet.Cells[r + 3, i + 1] = dt.Rows[r][i];      }      rowRead++;      percent = ((float)(100 * rowRead)) / totalCount;      //System.Threading.Thread.Sleep(500);      //如果字的数量过多则自动换行。worksheet.Cells[r+1, 4]为worksheet.Cells[行, 列]      worksheet.get_Range(worksheet.Cells[r + 3, 4], worksheet.Cells[r + 1, 4]).Columns.WrapText = true;   //自动换行      worksheet.get_Range(worksheet.Cells[r + 3, 4], worksheet.Cells[r + 3, 4]).Rows.AutoFit(); //自动加行高      //this.Text = "导出数据[" + percent.ToString("0.00") + "%]...";    }    range = worksheet.get_Range(worksheet.Cells[2, 1], worksheet.Cells[dt.Rows.Count + 2, dt.Columns.Count]);    range.BorderAround(Excel.XlLineStyle.xlContinuous, Excel.XlBorderWeight.xlThin, Excel.XlColorIndex.xlColorIndexAutomatic, null);    range.Borders[Excel.XlBordersIndex.xlInsideHorizontal].ColorIndex = Excel.XlColorIndex.xlColorIndexAutomatic;    range.Borders[Excel.XlBordersIndex.xlInsideHorizontal].LineStyle = Excel.XlLineStyle.xlContinuous;    range.Borders[Excel.XlBordersIndex.xlInsideHorizontal].Weight = Excel.XlBorderWeight.xlThin;    if (dt.Columns.Count > 1)    {      range.Borders[Excel.XlBordersIndex.xlInsideVertical].ColorIndex = Excel.XlColorIndex.xlColorIndexAutomatic;      range.Borders[Excel.XlBordersIndex.xlInsideVertical].LineStyle = Excel.XlLineStyle.xlContinuous;      range.Borders[Excel.XlBordersIndex.xlInsideVertical].Weight = Excel.XlBorderWeight.xlThin;    }    xlApp.Visible = true;  }  catch  {    MessageBox.Show("到出Excel失败！", "提示信息", MessageBoxButtons.OK, MessageBoxIcon.Error);  }  finally  {    System.Runtime.InteropServices.Marshal.ReleaseComObject(worksheet);    System.Runtime.InteropServices.Marshal.ReleaseComObject(workbook);    System.Runtime.InteropServices.Marshal.ReleaseComObject(workbooks);    System.Runtime.InteropServices.Marshal.ReleaseComObject(xlApp);    //KillProcess("Excel");    GC.Collect();//强行销毁  }}