一、asp.net DataGridView导出到Excel的三个方法 #region DataGridView数据显示到Excel/// <summary>/// 打开Excel并将DataGridView控件中数据导出到Excel/// </summary>/// <param name="dgv">DataGridView对象 </param>/// <param name="isShowExcle">是否显示Excel界面 </param>/// <remarks>/// add com "Microsoft Excel 11.0 Object Library"/// using Excel=Microsoft.Office.Interop.Excel;/// </remarks>/// <returns> </returns>public bool DataGridviewShowToExcel(DataGridView dgv, bool isShowExcle){if (dgv.Rows.Count == 0)return false;//建立Excel对象Excel.Application excel = new Excel.Application();excel.Application.Workbooks.Add(true);excel.Visible = isShowExcle;//生成字段名称for (int i = 0; i < dgv.ColumnCount; i++){excel.Cells[1, i + 1] = dgv.Columns[i].HeaderText;}//填充数据for (int i = 0; i < dgv.RowCount - 1; i++){for (int j = 0; j < dgv.ColumnCount; j++){if (dgv[j, i].ValueType == typeof(string)){excel.Cells[i + 2, j + 1] = "'" + dgv[j, i].Value.ToString();}else{excel.Cells[i + 2, j + 1] = dgv[j, i].Value.ToString();}}}return true;}#endregion#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 += "";elsecolumnValue += 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#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 11.0 Object Library"/// using Excel=Microsoft.Office.Interop.Excel;/// using System.Reflection;/// </remarks>/// <param name= "dgv"> DataGridView </param>public static void DataGridViewToExcel(DataGridView dgv){#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0if (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0if (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65536if (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255if (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;}}#endregionExcel.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! 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