在使用前首先需要添加引用：Microsoft.Office.Interop.Excel，然后在调用页添加如下语句：
using Excel = Microsoft.Office.Interop.Excel;
/**//// <summary>
/// 导出为Excel格式文件 /// </summary> /// <param name="dt">作为数据源的DataTable</param> /// <param name="saveFile">带路径的保存文件名</param>
/// <param name="title">一个Excel sheet的标题</param> private void exportExcel(DataTable dt,string saveFile,string title) ...{ rptExcel = new Microsoft.Office.Interop.Excel.Application(); if (rptExcel == null)
...{ MessageBox.Show("无法打开EXcel，请检查Excel是否可用或者是否安装好Excel", "系统提示"); return;
} int rowCount = dt.Rows.Count;//行数 int columnCount = dt.Columns.Count;//列数 float percent = 0;//导出进度 this.Cursor = Cursors.WaitCursor; //保存文化环境 System.Globalization.CultureInfo currentCI = System.Threading.Thread.CurrentThread.CurrentCulture; System.Threading.Thread.CurrentThread.CurrentCulture = new System.Globalization.CultureInfo("en-US"); Excel.Workbook workbook = rptExcel.Workbooks.Add(Excel.XlWBATemplate.xlWBATWorksheet); Excel.Worksheet worksheet = (Excel.Worksheet)workbook.Sheets.get_Item(1); worksheet.Name = "报表";//一个sheet的名称 //rptExcel.Visible = true;//打开导出的Excel文件 worksheet.Cells[1, 1] = title;//表标题 //填充列标题 for (int i = 0; i < columnCount; i++) ...{ worksheet.Cells[2, i + 1] = dt.Columns[i].ColumnName; } //创建对象数组存储DataTable的数据，这样的效率比直接将Datateble的数据填充worksheet.Cells[row,col]高 object[,] objData = new object[rowCount, columnCount]; //填充内容到对象数组 for (int r = 0; r < rowCount; r++) ...{ for (int col = 0; col < columnCount; col++) ...{ objData[r, col] = dt.Rows[r][col].ToString(); } percent = ((float)(r+1) * 100) / rowCount; this.panelProgress.Visible = true;//显示进度条 this.lblPercents.Text=percent.ToString("n") + "%"; this.progressBar1.Value = Convert.ToInt32(percent); System.Windows.Forms.Application.DoEvents(); } //将对象数组的值赋给Excel对象 Excel.Range range = worksheet.get_Range(worksheet.Cells[3, 1], worksheet.Cells[rowCount + 2, columnCount]); range.NumberFormat = "@";//设置数字文本格式 range.Value2 = objData; //设置格式 worksheet.get_Range(worksheet.Cells[1, 1], worksheet.Cells[1, columnCount]).MergeCells = true;//合并单元格 worksheet.get_Range(worksheet.Cells[1, 1], worksheet.Cells[1, columnCount]).HorizontalAlignment = Excel.XlVAlign.xlVAlignCenter;//居中对齐 worksheet.get_Range(worksheet.Cells[1, 1], worksheet.Cells[1, columnCount]).RowHeight = 38; worksheet.get_Range(worksheet.Cells[1, 1], worksheet.Cells[1, columnCount]).Font.Bold = true; worksheet.get_Range(worksheet.Cells[1, 1], worksheet.Cells[1, columnCount]).Font.Name = "黑体"; worksheet.get_Range(worksheet.Cells[1, 1], worksheet.Cells[1, columnCount]).Font.Size = 16; worksheet.get_Range(worksheet.Cells[2, 1], worksheet.Cells[rowCount + 2, columnCount]).Borders.LineStyle = 1;//设置边框 worksheet.get_Range(worksheet.Cells[2, 1], worksheet.Cells[rowCount, columnCount]).Columns.AutoFit();//设置单元格宽度为自适应 //恢复文化环境 System.Threading.Thread.CurrentThread.CurrentCulture = currentCI; try ...{ //rptExcel.Save(saveFile); //自动创建一个新的Excel文档保存在“我的文档”里，如果不用SaveFileDialog就可用这种方法 workbook.Saved=true; workbook.SaveCopyAs(saveFile);//以复制的形式保存在已有的文档里 this.Cursor = Cursors.Default; this.panelProgress.Visible = false;//隐藏进度条 MessageBox.Show("恭喜，数据已经成功导出为Excel文件！", "成功导出"); } catch (Exception ex) ...{ MessageBox.Show("导出文件出错，文件可能正被打开，具体原因：" + ex.Message, "出错信息"); } finally ...{ dt.Dispose(); rptExcel.Quit(); System.Runtime.InteropServices.Marshal.ReleaseComObject(rptExcel); System.Runtime.InteropServices.Marshal.ReleaseComObject(worksheet); System.Runtime.InteropServices.Marshal.ReleaseComObject(workbook); GC.Collect(); KillAllExcel(); } }
/**//// <summary> /// 获得所有的Excel进程 /// </summary> /// <returns>所有的Excel进程</returns> private List<Process> GetExcelProcesses() ...{ Process[] processes = Process.GetProcesses(); List<Process> excelProcesses = new List<Process>(); for (int i = 0; i < processes.Length; i++) ...{ if (processes[i].ProcessName.ToUpper() == "EXCEL") excelProcesses.Add(processes[i]); } return excelProcesses; } private void KillAllExcel() ...{ List<Process> excelProcess = GetExcelProcesses(); for (int i = 0; i < excelProcess.Count; i++) ...{ excelProcess[i].Kill(); } }