.net Excel 导入 导出

 1  PRotected void BtnLoad_Click(object sender, EventArgs e) 2         { 3             //dataDR datadr = new dataDR(); 4             //datadr.delete("delete from dbo.yuepingjueyuerbiao"); 5             string fileName = DateTime.Now.ToString("yyMMddhhmmss") + ".xls"; 6             string path = Server.MapPath("~/upload/excel/") + fileName; 7  8             FileUpload1.SaveAs(path); 9             if (path != null)10             {11                DataSet ds=loadSouce(path);12             }13             else14             {15                 Response.Write("<script>alert('没有上传文件')</script>");16             }17         }18 19         protected void Button1_Click(object sender, EventArgs e)20         {21             CreateExcel(helps.GetDataTable("select * from tb_teacher"), "Test.xls");22         }

1  <div>2 3             <asp:FileUpload ID="FileUpload1" runat="server" /><asp:Button ID="BtnLoad" runat="server" Text="上传" OnClick="BtnLoad_Click" />4 5         </div>6 7         <asp:Button ID="Button1" runat="server" Text="下载" style="height: 21px" OnClick="Button1_Click" />

导入方法

 1  private DataSet loadSouce(string path) 2         { 3  4  5             //连接EXCEL数据源 6             //string strPath = this.getPath(); 7             //string strConn = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + path + ";Extended Properties=" + "\"" + "Excel 8.0;HDR=Yes;IMEX=1" + "\""; 8  9             // string strConn = "Provider = Microsoft.ACE.OLEDB.12.0;Data Source =" + path + ";Extended Properties='Excel 12.0;HDR=Yes;IMEX=1'";10             string strConn = "Provider = Microsoft.ACE.OLEDB.15.0;Data Source =" + path + ";Extended Properties='Excel 12.0;HDR=Yes;IMEX=1'";11             //此连接可以操作.xls与.xlsx文件 (支持Excel2003 和 Excel2007 的连接字符串)12             //备注： "HDR=yes;"是说Excel文件的第一行是列名而不是数据，"HDR=No;"正好与前面的相反。13             //      "IMEX=1 "如果列中的数据类型不一致，使用"IMEX=1"可必免数据类型冲突。 14 15             OleDbConnection conn = new OleDbConnection(strConn);16 17             conn.Open();18 19             /*20              如果用户把sheet表名改了就是报下面的错：21             'sheet1$' 不是一个有效名称。请确认它不包含无效的字符或标点，且名称不太长。 22             如果可以动态获得Excel中各个sheet的名称能动态的选中返回哪个sheet的数据，23             即使用户更改了名称也不怕，完全可以把所有sheet的名称列出来供用户选择: 24             下面就把解决问题的代码列出来，主要用到了OleDbConnection.GetOleDbSchemaTable()方法25              */26 27             //返回Excel的架构，包括各个sheet表的名称,类型，创建时间和修改时间等28             System.Data.DataTable dtSheetName = conn.GetOleDbSchemaTable(OleDbSchemaGuid.Tables, new object[] { null, null, null, "Table" });29 30             //包含excel中表名的字符串数组31             string[] strTableNames = new string[dtSheetName.Rows.Count];32             for (int k = 0; k < dtSheetName.Rows.Count; k++)33             {34                 strTableNames[k] = dtSheetName.Rows[k]["TABLE_NAME"].ToString();35             }36 37             //OleDbDataAdapter myCommand = null;38             System.Data.DataTable dt = new System.Data.DataTable();39 40             //从指定的表明查询数据,可先把所有表明列出来供用户选择41             string strExcel = "select * from [" + strTableNames[0] + "]";42 43 44 45             OleDbDataAdapter myCommand = new OleDbDataAdapter(strExcel, strConn);46 47             DataSet myDataSet = new DataSet();48 49 50             myCommand.Fill(myDataSet);51 52             return myDataSet;53         }

导出方法

 1  private void CreateExcel(System.Data.DataTable dt, string fileName) 2         { 3             HttpResponse resp; 4             resp = Page.Response; 5  6             resp.Buffer = true; 7             resp.ClearContent(); 8             resp.ClearHeaders(); 9             resp.Charset = "GB2312";10 11 12             //  resp.ContentEncoding = System.Text.Encoding.GetEncoding("utf-8");13             resp.AppendHeader("Content-Disposition", "attachment;filename=" + fileName);14             resp.ContentEncoding = System.Text.Encoding.Default;//设置输出流为简体中文   15             resp.ContentType = "application/ms-excel";//设置输出文件类型为excel文件。 16 17 18 19             string colHeaders = "", ls_item = "";20 21             ////定义表对象与行对象，同时用DataSet对其值进行初始化22             //DataTable dt = ds.Tables[0];23             DataRow[] myRow = dt.Select();//可以类似dt.Select("id>10")之形式达到数据筛选目的24 25             int i = 0;26             int cl = dt.Columns.Count;27 28 29             // colHeaders += "tttttttt" + "\n";30             //取得数据表各列标题，各标题之间以t分割，最后一个列标题后加回车符31             for (i = 0; i < cl; i++)32             {33                 if (i == (cl - 1))//最后一列，加n34                 {35                     colHeaders += dt.Columns[i].Caption.ToString().Trim() + "\n";36                 }37                 else38                 {39                     colHeaders += dt.Columns[i].Caption.ToString().Trim() + "\t";40                 }41 42             }43             resp.Write(colHeaders);44 45             //向HTTP输出流中写入取得的数据信息46 47 48 49             //逐行处理数据 50             foreach (DataRow row in myRow)51             {52                 //当前行数据写入HTTP输出流，并且置空ls_item以便下行数据   53                 for (i = 0; i < cl; i++)54                 {55                     if (i == (cl - 1))//最后一列，加n56                     {57                         ls_item += row[i].ToString().Trim() + "\n";58                     }59                     else60                     {61                         ls_item += row[i].ToString().Trim() + "\t";62                     }63 64                 }65                 resp.Write(ls_item);66                 ls_item = "";67 68             }69             resp.End();70 71         }

记得引用Micorosoft.office.Interop.Excel