DataGridView导入导出excel
DataGridView导出到Excel
#region 方法一 DateGridView导出到csv格式的Excel /// <summary> /// 导出数据到Excel.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> /// <param name="dgv"></param> private void DataGridViewToExcel(DataGridView dgv) { SaveFileDialog saveFileDialog = new SaveFileDialog(); saveFileDialog.Filter = "Execl files (*.xls)|*.xls"; saveFileDialog.FilterIndex = 0; saveFileDialog.RestoreDirectory = true; saveFileDialog.CreatePrompt = true; saveFileDialog.Title = "导出Excel文件到"; saveFileDialog.ShowDialog(); if (saveFileDialog.FileName == "") { return; } Stream myStream; myStream = saveFileDialog.OpenFile(); StreamWriter sw = new StreamWriter(myStream, Encoding.Default); string strhead = ""; string str = ""; try { //写表格标题 for (int i = 0; i < dgv.ColumnCount; i++) { if (i == dgv.ColumnCount - 1) strhead = strhead + dgv.Columns[i].HeaderText.ToString().Replace("\r", " ").Replace("\n", " ").Replace("\t", " ") + "\n"; else strhead = strhead + dgv.Columns[i].HeaderText.ToString().Replace("\r", " ").Replace("\n", " ").Replace("\t", " ") + "\t"; } sw.Write(strhead); //写内容 for (int i = 0; i < dgv.Rows.Count; i++) { for (int j = 0; j < dgv.ColumnCount; j++) { if (j == dgv.ColumnCount - 1) str = str + dgv.Rows[i].Cells[j].Value.ToString().Replace("\r", " ").Replace("\n", " ").Replace("\t", " ") + "\n"; else str = str + dgv.Rows[i].Cells[j].Value.ToString().Replace("\r", " ").Replace("\n", " ").Replace("\t", " ") + "\t"; } sw.Write(str); str = ""; } sw.Close(); myStream.Close(); } catch (Exception e1) { MessageBox.Show(e1.ToString()); } finally { sw.Close(); myStream.Close(); } } #endregion #region 方法二 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 方法三 DataGridView导出到Excel，有一定的判断性 /// <summary> www.2cto.com ///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
Excel导入到DataGridView
/// <summary> /// Excel数据导入方法 /// </summary> /// <param name="filePath"></param> /// <param name="dgv"></param> public void ExcelToDataGridView(DataGridView dgv) { OpenFileDialog ofd = new OpenFileDialog(); ofd.Title = "从Excel文件导入数据"; ofd.FileName = ""; ofd.InitialDirectory = Environment.GetFolderPath(Environment.SpecialFolder.MyDocuments); ofd.Filter = "Excel文件(*.xls)|*.xls"; ofd.ValidateNames = true; ofd.CheckFileExists = true; ofd.CheckPathExists = true; string fileName = string.Empty; if (ofd.ShowDialog() == DialogResult.OK) { fileName = ofd.FileName; //根据路径打开一个Excel文件并将数据填充到DataSet中 string strConn = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source = " + fileName + ";Extended Properties ='Excel 8.0;HDR=NO;IMEX=1'";//导入时包含Excel中的第一行数据，并且将数字和字符混合的单元格视为文本进行导入 OleDbConnection conn = new OleDbConnection(strConn); conn.Open(); string strExcel = ""; OleDbDataAdapter myCommand = null; DataSet ds = null; strExcel = "select * from [sheet1$]"; myCommand = new OleDbDataAdapter(strExcel, strConn); ds = new DataSet(); myCommand.Fill(ds, "table1"); //根据DataGridView的列构造一个新的DataTable DataTable tb = new DataTable(); foreach (DataGridViewColumn dgvc in dgv.Columns) { if (dgvc.Visible && dgvc.CellType != typeof(DataGridViewCheckBoxCell)) { DataColumn dc = new DataColumn(); dc.ColumnName = dgvc.DataPropertyName; //dc.DataType = dgvc.ValueType;//若需要限制导入时的数据类型则取消注释，前提是DataGridView必须先绑定一个数据源那怕是空的DataTable tb.Columns.Add(dc); } } //根据Excel的行逐一对上面构造的DataTable的列进行赋值 foreach (DataRow excelRow in ds.Tables[0].Rows) { if (excelRow[0].ToString().Trim().Equals("")) continue; int i = 0; DataRow dr = tb.NewRow(); foreach (DataColumn dc in tb.Columns) { try { dr[dc] = excelRow[i]; } catch { dr[dc] = ""; } i++; } tb.Rows.Add(dr); } //在DataGridView中显示导入的数据,先清除，后绑定 //dgv.Columns.Clear(); dgv.DataSource = tb; }