如题，下面是DataGridView到处到Excel的两种方法，附有第二种的工程代码，最近项目使用到这块，就记下来了，其中第一种效率较第二种较高，但是没有第二种容易设置格式：
Code DateGridView导出到csv格式的Excel#region DateGridView导出到csv格式的Excel 
/**//// <summary> 
/// 常用方法，列之间加\t，一行一行输出，此文件其实是csv文件，不过默认可以当成Excel打开。 /// </summary> /// <remarks> /// using System.IO; /// </remarks> 
/// <param name="dgv"></param> private void DataGridViewToExcel(DataGridView dgv) 
{ SaveFileDialog dlg = new SaveFileDialog(); dlg.Filter = "Execl files (*.xls)|*.xls"; dlg.FilterIndex = 0; dlg.RestoreDirectory = true; dlg.CreatePrompt = true; dlg.Title = "保存为Excel文件"; if (dlg.ShowDialog() == DialogResult.OK) { Stream myStream; myStream = dlg.OpenFile(); StreamWriter sw = new StreamWriter(myStream, System.Text.Encoding.GetEncoding(-0)); string columnTitle = ""; try { //写入列标题 for (int i = 0; i < dgv.ColumnCount; i++) { if (i > 0) { columnTitle += "\t"; } columnTitle += dgv.Columns[i].HeaderText; } sw.WriteLine(columnTitle); //写入列内容 for (int j = 0; j < dgv.Rows.Count; j++) { string columnValue = ""; for (int k = 0; k < dgv.Columns.Count; k++) { if (k > 0) { columnValue += "\t"; } if (dgv.Rows[j].Cells[k].Value == null) columnValue += ""; else columnValue += dgv.Rows[j].Cells[k].Value.ToString().Trim(); } sw.WriteLine(columnValue); } sw.Close(); myStream.Close(); } catch (Exception e) { MessageBox.Show(e.ToString()); } finally { sw.Close(); myStream.Close(); } } } 
#endregion 
DataGridView导出到Excel，有一定的判断性#region DataGridView导出到Excel，有一定的判断性 /**//// <summary> ///方法，导出DataGridView中的数据到Excel文件 /// </summary> /// <remarks> /// add com "Microsoft Excel 0 Object Library" /// using Excel=Microsoft.Office.Interop.Excel; /// using System.Reflection; /// </remarks> /// <param name= "dgv"> DataGridView </param> public static void DataGridViewToExcel(DataGridView dgv) { 验证可操作性#region 验证可操作性 //申明保存对话框 SaveFileDialog dlg = new SaveFileDialog(); //默然文件后缀 dlg.DefaultExt = "xls "; //文件后缀列表 dlg.Filter = "EXCEL文件(*.XLS)|*.xls "; //默然路径是系统当前路径 dlg.InitialDirectory = Directory.GetCurrentDirectory(); //打开保存对话框 if (dlg.ShowDialog() == DialogResult.Cancel) return; //返回文件路径 string fileNameString = dlg.FileName; //验证strFileName是否为空或值无效 if (fileNameString.Trim() == " ") { return; } //定义表格内数据的行数和列数 int rowscount = dgv.Rows.Count; int colscount = dgv.Columns.Count; //行数必须大于0 if (rowscount <= 0) { MessageBox.Show("没有数据可供保存 ", "提示 ", MessageBoxButtons.OK, MessageBoxIcon.Information); return; } //列数必须大于0 if (colscount <= 0) { MessageBox.Show("没有数据可供保存 ", "提示 ", MessageBoxButtons.OK, MessageBoxIcon.Information); return; } //行数不可以大于65536 if (rowscount > 65536) { MessageBox.Show("数据记录数太多(最多不能超过65536条)，不能保存 ", "提示 ", MessageBoxButtons.OK, MessageBoxIcon.Information); return; } //列数不可以大于255 if (colscount > 255) { MessageBox.Show("数据记录行数太多，不能保存 ", "提示 ", MessageBoxButtons.OK, MessageBoxIcon.Information); return; } //验证以fileNameString命名的文件是否存在，如果存在删除它 FileInfo file = new FileInfo(fileNameString); if (file.Exists) { try { file.Delete(); } catch (Exception error) { MessageBox.Show(error.Message, "删除失败 ", MessageBoxButtons.OK, MessageBoxIcon.Warning); return; } } #endregion Excel.Application objExcel = null; Excel.Workbook objWorkbook = null; Excel.Worksheet objsheet = null; try { //申明对象 objExcel = new Microsoft.Office.Interop.Excel.Application(); objWorkbook = objExcel.Workbooks.Add(Missing.Value); objsheet = (Excel.Worksheet)objWorkbook.ActiveSheet; //设置EXCEL不可见 objExcel.Visible = false; //向Excel中写入表格的表头 int displayColumnsCount = 1; for (int i = 0; i <= dgv.ColumnCount - 1; i++) { if (dgv.Columns[i].Visible == true) { objExcel.Cells[1, displayColumnsCount] = dgv.Columns[i].HeaderText.Trim(); displayColumnsCount++; } } //设置进度条 //tempProgressBar.Refresh(); //tempProgressBar.Visible = true; //tempProgressBar.Minimum=1; //tempProgressBar.Maximum=dgv.RowCount; //tempProgressBar.Step=1; //向Excel中逐行逐列写入表格中的数据 for (int row = 0; row <= dgv.RowCount - 1; row++) { //tempProgressBar.PerformStep(); displayColumnsCount = 1; for (int col = 0; col < colscount; col++) { if (dgv.Columns[col].Visible == true) { try { objExcel.Cells[row + 2, displayColumnsCount] = dgv.Rows[row].Cells[col].Value.ToString().Trim(); displayColumnsCount++; } catch (Exception) { } } } } //隐藏进度条 //tempProgressBar.Visible = false; //保存文件 objWorkbook.SaveAs(fileNameString, Missing.Value, Missing.Value, Missing.Value, Missing.Value, Missing.Value, Excel.XlSaveAsAccessMode.xlShared, Missing.Value, Missing.Value, Missing.Value, Missing.Value, Missing.Value); } catch (Exception error) { MessageBox.Show(error.Message, "警告 ", MessageBoxButtons.OK, MessageBoxIcon.Warning); return; } finally { //关闭Excel应用 if (objWorkbook != null) objWorkbook.Close(Missing.Value, Missing.Value, Missing.Value); if (objExcel.Workbooks != null) objExcel.Workbooks.Close(); if (objExcel != null) objExcel.Quit(); objsheet = null; objWorkbook = null; objExcel = null; } MessageBox.Show(fileNameString + "\n\n导出完毕! ", "提示 ", MessageBoxButtons.OK, MessageBoxIcon.Information); } #endregion