一，读取Excel文件内容：
1 //根据excle的路径把第一个sheel中的内容放入datatable 2 public static DataTable ReadExcelToTable()//excel存放的路径 3 { 4 //链接字符串 5 string connstring = "Provider=Microsoft.ACE.OLEDB.12.0;Data Source=" + "E:/Peng.Tao/TEST/1.xlsx" + ";Extended Properties='Excel8.0;HDR=NO;IMEX=1';"; // Office 07及以上版本 不能出现多余的空格 并且分号注意 6 //string connstring = Provider=Microsoft.JET.OLEDB.4.0;Data Source=" + path + ";Extended Properties='Excel 8.0;HDR=NO;IMEX=1';"; //Office 07如下版本 7 using (OleDbConnection conn = new OleDbConnection(connstring)) 8 { 9 conn.Open(); 10 DataTable sheetsName = conn.GetOleDbSchemaTable(OleDbSchemaGuid.Tables, new object[] { null, null, null, "Table" }); //获得全部sheet的名字 11 string firstSheetName = sheetsName.Rows[0][2].ToString(); //获得第一个sheet的名字 12 string sql = string.Format("SELECT * FROM [{0}]", firstSheetName); //查询字符串 13 //string sql = string.Format("SELECT * FROM [{0}] WHERE [日期] is not null", firstSheetName); //查询字符串 14 OleDbDataAdapter ada = new OleDbDataAdapter(sql, connstring); 15 DataSet set = new DataSet(); 16 ada.Fill(set); 17 return set.Tables[0]; 18 } 19 }
二，将数据导入至Excel:
1 protected void Excel1_Click(object sender, EventArgs e) { 2 //设置保存的文档类型 3 //Response.ContentType = "application/ms-word";//保存为Word类型 4 Response.ContentType = "application/ms-excel";//保存为Excel类型 5 //设置编码方式和内容保存的形式 6 Response.ContentEncoding = System.Text.Encoding.UTF8; 7 Response.Charset = "Excel文档"; 8 //设置保存为的文件名 9 string dateStr = DateTime.Now.ToString("yyyyMMddHHmmss"); 10 string fileName = System.Web.HttpUtility.UrlEncode("料号文件" + dateStr, System.Text.Encoding.UTF8); 11 Response.AppendHeader("content-disposition", "attachment;filename=\"" + fileName + ".xls\""); 12 //开始导出; 13 this.EnableViewState = false; 14 StringWriter oStringWriter = new StringWriter(); 15 HtmlTextWriter oHtmlTextWriter = new HtmlTextWriter(oStringWriter); 16 GridView1.RenderControl(oHtmlTextWriter); 17 Response.Write(oStringWriter.ToString()); 18 oStringWriter = new StringWriter(); 19 oHtmlTextWriter = new HtmlTextWriter(oStringWriter); 20 GridView1.RenderControl(oHtmlTextWriter); 21 Response.Write(oStringWriter.ToString()); 22 Response.End(); 23 } 24 //添加如下函数防止出现:“Gridview控件需在Runat=server中” 的异常 25 public override void VerifyRenderingInServerForm(Control control) 26 { 27 //base.VerifyRenderingInServerForm(control); 28 }
三，WinForm将DataGridView数据导出至EXCEL
1 private void button2_Click(object sender, EventArgs e) 2 { 3 ToExcel(); 4 } 5 public void ToExcel() 6 { 7 try 8 { 9 //没有数据的话就不往下执行 10 if (dataGridView1.Rows.Count == 0) 11 return; 12 //实例化一个Excel.Application对象 13 Microsoft.Office.Interop.Excel.Application excel = new Microsoft.Office.Interop.Excel.Application(); 14 //让后台执行设置为不可见，为true的话会看到打开一个Excel，而后数据在往里写 15 excel.Visible = true; 16 //新增长一个工做簿，Workbook是直接保存，不会弹出保存对话框，加上Application会弹出保存对话框，值为false会报错 17 excel.Application.Workbooks.Add(true); 18 //生成Excel中列头名称 19 for (int i = 0; i < dataGridView1.Columns.Count; i++) 20 { 21 if (this.dataGridView1.Columns[i].Visible == true) 22 { 23 excel.Cells[1, i + 1] = dataGridView1.Columns[i].HeaderText; 24 } 25 26 } 27 //把DataGridView当前页的数据保存在Excel中 28 for (int i = 0; i < dataGridView1.Rows.Count - 1; i++) 29 { 30 System.Windows.Forms.Application.DoEvents(); 31 for (int j = 0; j < dataGridView1.Columns.Count; j++) 32 { 33 if (this.dataGridView1.Columns[j].Visible == true) 34 { 35 if (dataGridView1[j, i].ValueType == typeof(string)) 36 { 37 excel.Cells[i + 2, j + 1] = "'" + dataGridView1[j, i].Value.ToString(); 38 } 39 else 40 { 41 excel.Cells[i + 2, j + 1] = dataGridView1[j, i].Value.ToString(); 42 } 43 } 44 45 } 46 } 47 //设置禁止弹出保存和覆盖的询问提示框 48 excel.DisplayAlerts = false; 49 excel.AlertBeforeOverwriting = false; 50 //保存工做簿 51 excel.Application.Workbooks.Add(true).Save(); 52 //保存excel文件 53 excel.Save("E:\\Peng.Tao\\Winform\\MyFirstWinform" + "\\Data.xls"); 54 //确保Excel进程关闭 55 excel.Quit(); 56 excel = null; 57 GC.Collect();//若是不使用这条语句会致使excel进程没法正常退出，使用后正常退出 58 MessageBox.Show(this, "文件已经成功导出！", "信息提示"); 59 } 60 catch (Exception ex) 61 { 62 MessageBox.Show(ex.Message, "错误提示"); 63 } 64 }