菜鸟:导入导出Execl

 //导出Execl模版
    protected void Button1_Click(object sender, EventArgs e)
    {
        //DataTable table = server.selectNewsByNid("9");
        //getExcel(table);
        getExcel1();
    }
    //手动生成一个Execl
    protected void getExcel1()
    {
        NPOI.HSSF.UserModel.HSSFWorkbook book = new NPOI.HSSF.UserModel.HSSFWorkbook();
        NPOI.SS.UserModel.Sheet sheet = book.CreateSheet("学生信息列表");
        NPOI.SS.UserModel.Row row = sheet.CreateRow(0);
        row.CreateCell(1).SetCellValue("姓名");
        row.CreateCell(2).SetCellValue("学好");
        row.CreateCell(3).SetCellValue("性别");
        row.CreateCell(4).SetCellValue("学校");
        System.IO.MemoryStream ms = new System.IO.MemoryStream();
        book.Write(ms);
        Response.AddHeader("Content-Disposition", string.Format("p_w_upload; filename=ImportTemplate.xls"));
        Response.BinaryWrite(ms.ToArray());
        book = null;
        ms.Close();
        ms.Dispose();
    }
    //自动生成Execl
    protected void getExcel(DataTable dt)
    {
        NPOI.HSSF.UserModel.HSSFWorkbook book = new NPOI.HSSF.UserModel.HSSFWorkbook();
        NPOI.SS.UserModel.Sheet sheet = book.CreateSheet("学生信息列表");
        NPOI.SS.UserModel.Row row = sheet.CreateRow(0);

        for (int i = 0; i < dt.Columns.Count; i++)
        {
            row.CreateCell(i).SetCellValue(GetColumnName(dt.Columns[i].ColumnName));
        } for (int i = 0; i < dt.Rows.Count; i++)
        {
            NPOI.SS.UserModel.Row row2 = sheet.CreateRow(i + 1);
            for (int j = 0; j < dt.Columns.Count; j++)
                row2.CreateCell(j).SetCellValue(dt.Rows[i][j].ToString());
        }         //写入到客户端  
        System.IO.MemoryStream ms = new System.IO.MemoryStream();
        book.Write(ms);
        Response.AddHeader("Content-Disposition", string.Format("p_w_upload; filename=学生信息导入模版.xls"));
        Response.BinaryWrite(ms.ToArray());
        book = null;
        ms.Close();
        ms.Dispose();
    }
    //列表标题
    private string GetColumnName(string ColumnName)
    {
        string result = string.Empty;
        switch (ColumnName.ToUpper())
        {
            case "Title":
                result = "";
                break;
            case "NewContent":
                result = "";
                break;
            case "AppID":
                result = "";
                break;
            case "AddTime":
                result = "";
                break;
            default:
                result = "未知";
                break;
        }
        return result;
    }

 

    //导入Ececl数据
    protected void Button2_Click(object sender, EventArgs e)
    {
        //string strConn = "Data Source=.;DataBase=XXXX;Uid=sa;Pwd=sa";
        string strConn = @"Data Source=GNET-LIULIANG\DB2005;Initial Catalog=CMS;User ID=sa;Password=sasa";
        if (FileUpload1.HasFile == false)//HasFile用来检查FileUpload是否有指定文件
        {
            Response.Write("<script>alert('请您选择Excel文件')</script> ");
            return;//当无文件时,返回
        }
        string IsXls = System.IO.Path.GetExtension(FileUpload1.FileName).ToString().ToLower();//System.IO.Path.GetExtension获得文件的扩展名
        if (IsXls != ".xls")
        {
            Response.Write("<script>alert('只可以选择Excel文件')</script>");
            return;//当选择的不是Excel文件时,返回
        }
        SqlConnection cn = new SqlConnection(strConn);
        cn.Open();
        string filename = FileUpload1.FileName;              //获取Execle文件名  DateTime日期函数
        string savePath = Server.MapPath(("p_w_picpaths/logo/") + filename);//Server.MapPath 获得虚拟服务器相对路径
        FileUpload1.SaveAs(savePath);                        //SaveAs 将上传的文件内容保存在服务器上
        DataSet ds = ExecleDs(savePath, filename);           //调用自定义方法
        DataRow[] dr = ds.Tables[0].Select();            //定义一个DataRow数组
        int rowsnum = ds.Tables[0].Rows.Count;
        if (rowsnum == 0)
        {
            Response.Write("<script>alert('Excel表为空表,无数据!')</script>");   //当Excel表为空时,对用户进行提示
        }
        else
        {
            Response.Write("<script>alert('获取" + ds.Tables.Count + "行数据')</script>");
            //for (int i = 0; i < dr.Length; i++)
            //{
            //    string xx = dr[i]["EXCEL列名"].ToString();//日期 excel列名【名称不能变,否则就会出错】
            //    string insertstr = "";

            //    SqlCommand cmd = new SqlCommand(insertstr, cn);
            //    try
            //    {
            //        cmd.ExecuteNonQuery();
            //    }
            //    catch (MembershipCreateUserException ex)       //捕捉异常
            //    {
            //        Response.Write("<script>alert('导入内容:" + ex.Message + "')</script>");
            //    }

            //}
            //Response.Write("<script>alert('Excle表导入成功!');location='default.aspx'</script>");
        }

        cn.Close();

    }

    public DataSet ExecleDs(string filenameurl, string table)
    {

        string strConn = "Provider=Microsoft.Jet.OleDb.4.0;" + "data source=" + filenameurl + ";Extended Properties='Excel 8.0; HDR=YES; IMEX=1'";
        OleDbConnection conn = new OleDbConnection(strConn);
        conn.Open();
        DataSet ds = new DataSet();
        OleDbDataAdapter odda = new OleDbDataAdapter("select * from [学生信息列表$]", conn);
        odda.Fill(ds, table);
        return ds;
    }

 

带加一个dll文件