ASP.NET导入导出

 //创建一个数据链接
           // string strCon =" Provider=Microsoft.Jet.OLEDB.4.0;Data Source={0} ;Extended Properties='Excel 8.0;HDR=yes'"; 
//@"Provider=Microsoft.ACE.OleDb.12.0;Data Source="+path+";Extended Properties='Excel 12.0;HDR=YES'";
            //  HDR=NO　即无字段 
            //   HDR=yes　即有字段，一般默认excel表中第1行的列标题为字段名，如姓名、年龄等 
            //如果您在连接字符串中指定 HDR=NO，Jet OLE DB 提供程序将自动为您命名字段（F1 表示第一个字段，F2 表示第二个字段，依此类推）； 
            // IMEX　表示是否强制转换为文本 
            //   Excel 驱动程序读取指定源中一定数量的行（默认情况下为 8 行）以推测每列的数据类型。 
            //如果推测出列可能包含混合数据类型（尤其是混合了文本数据的数值数据时）， 
            //驱动程序将决定采用占多数的数据类型，并对包含其他类型数据的单元返回空值。 
            //（如果各种数据类型的数量相当，则采用数值类型。） 
            //Excel 工作表中大部分单元格格式设置选项不会影响此数据类型判断。 
            //可以通过指定导入模式来修改 Excel 驱动程序的此行为。 
            //若要指定导入模式，请在“属性”窗口中将 IMEX=1 添加到 Excel 
            //连接管理器的连接字符串内的扩展属性值中。 

        //打开连接后，查询语句//" SELECT * FROM [Sheet1$] ";

      1.excel数据显示页面 2.excel数据导入到数据库中  3.excel中数据修改,新增,删除     

<%@ Page Title="" Language="C#" MasterPageFile="~/Site.Master" AutoEventWireup="true" CodeBehind="StudentMS.aspx.cs" Inherits="WebApplication1.StudentMS" %>
<asp:Content ID="Content1" ContentPlaceHolderID="HeadContent" runat="server">
</asp:Content>
<asp:Content ID="Content2" ContentPlaceHolderID="MainContent" runat="server">
    <p> 
        excle文件:<asp:FileUpload ID="FileUpload1" runat="server" />
        <asp:Button ID="Button3" runat="server" Text="导入" onclick="Button3_Click" />
        <br />
    </p>
    <p>
        <asp:Button ID="Button1" runat="server" Text="预览数据库中的数据" 
            onclick="Button1_Click" />
        <asp:Button ID="Button2" runat="server" Text="导出" onclick="Button2_Click" />
    </p>
    <p>
        <asp:GridView ID="GridView1" runat="server">
        </asp:GridView>
    </p>
    <p>
        </p>
</asp:Content>

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Data;
using System.IO;
using System.Data.OleDb;
using System.Data.SqlClient;

namespace WebApplication1
{
    public partial class StudentMS : System.Web.UI.Page
    {
        string connStr = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source={0};Extended Properties='Excel 8.0;HDR=yes'";
        string connS = "server=STER-PC;uid=sa;pwd=123;database=t2";
        protected void Page_Load(object sender, EventArgs e)
        {
            string fileName = "content/student.xls";
            fileName = Server.MapPath(fileName);
            connStr = string.Format(connStr, fileName);//连接字符串
        }

        private void BindList()
        {
            string sql = "select * from [Sheet1$]";
            OleDbConnection conn = new OleDbConnection(connStr);
            conn.Open();
            OleDbCommand cmd = new OleDbCommand(sql, conn);

            OleDbDataAdapter da = new OleDbDataAdapter(cmd);

            DataTable dt = new DataTable();
            da.Fill(dt);
            conn.Close();
            GridView1.DataSource = dt;
            GridView1.DataBind();
        }
      
        //导出
        protected void Button2_Click(object sender, EventArgs e)
        {

            //1.复制一份模板,将temp复制一份
            string oldpath = Server.MapPath("content/student.xls");
            string npath = Server.MapPath("content/temp.xls");
            if (File.Exists(npath))
            {
                File.Delete(npath);
            }
            File.Copy(oldpath,npath );
            //2.查询数据表
            string sql = "select * from sheet1";
            SqlConnection conn = new SqlConnection(connS);
            conn.Open();
            SqlCommand cmd = new SqlCommand(sql,conn);
            SqlDataAdapter da = new SqlDataAdapter(cmd);
            DataSet ds = new DataSet();
            da.Fill(ds,"bb");
            DataTable dt = ds.Tables["bb"];
            //3、将数据插入到表格中

            string sqlOleDb = "insert into [Sheet1$] values(@a,@b,@c)";
            OleDbParameter[] pms = new OleDbParameter[3];
            OleDbConnection oconn = new OleDbConnection(connStr);
            oconn.Open();
            OleDbCommand ocmd = new OleDbCommand(sqlOleDb,oconn);
            foreach (DataRow item in dt.Rows)
            {
                string id = item["编号"].ToString();
                string name = item["姓名"].ToString();
                string sex = item["性别"].ToString();

                pms[0] = new OleDbParameter("@a",id);
                pms[1] = new OleDbParameter("@b",name);
                pms[2] = new OleDbParameter("@c",sex);

                foreach (OleDbParameter itemo in pms)
                {
                    ocmd.Parameters.Add(itemo);
                }
                int i = ocmd.ExecuteNonQuery();
                
            }
            conn.Close();
            oconn.Close();


            Response.ContentType = "application/vnd.ms-excel";
            Response.AddHeader("content-disposition", "attchment;filename=aaa.xls");
            FileStream fs = new FileStream(Server.MapPath("content/temp.xls"), FileMode.Open, FileAccess.Read, FileShare.Read);
            Stream st = Response.OutputStream;
            byte[] bt = new byte[102400];
            while (true)
            {
                int len = fs.Read(bt, 0, bt.Length);
                if (len == 0) break;
                st.Write(bt, 0, len);
                Response.Flush();
            } fs.Close();
            Response.End();
            Response.Write("导出成功");



            #region
            //int oi = 1;
            //string cid = "";
            //string cname = "";
            //string csex = "";
            ////1.把temp.xls复制一份(data.xls) File.Copy()
            //File.Copy(MapPath("content/temp.xls"), MapPath("content/student55.xls"));
            ////2.把数据库中的student数据查询出来
            //string sqlc = "select * from sheet1";
            //SqlConnection connc = new SqlConnection(connS);
            //connc.Open();
            //SqlCommand cmdc = new SqlCommand(sqlc, connc);
            //SqlDataAdapter dac = new SqlDataAdapter(cmdc);
            //DataSet dsc = new DataSet();
            //DataTable dtc = dsc.Tables["aa"];
            ////把查询出来的数据一条条插入到data.xls,
            //foreach (DataRow item in dtc.Rows)
            //{
            //    cid = item["id"].ToString();
            //    cname = item["name"].ToString();
            //    csex = item["sex"].ToString();

            //    string ofileName = "content/temp.xls";
            //    ofileName = Server.MapPath(ofileName);
            //    connStr = string.Format(connStr, ofileName);//连接字符串             
            //    string osql = "select * from [Sheet1$]";
            //    OleDbConnection oconn = new OleDbConnection(connStr);
            //    oconn.Open();
            //    OleDbCommand ocmd = new OleDbCommand(osql, oconn);
            //    OleDbDataAdapter oda = new OleDbDataAdapter(ocmd);
            //    OleDbParameter[] pm = new OleDbParameter[3];
            //    pm[0] = new OleDbParameter("@a", cid);
            //    pm[1] = new OleDbParameter("@b", cname);
            //    pm[2] = new OleDbParameter("@c", csex);
            //    DataSet ods = new DataSet();
            //    oda.Fill(ods, "bb");
            //    DataTable odt = ods.Tables["bb"];
            //    foreach (OleDbParameter oitem in pm)
            //    {

            //        ocmd.Parameters.Add(oitem);
            //    }
            //    oi += ocmd.ExecuteNonQuery();
            //    oconn.Close();
            //}
            //if (oi > 1)
            //{
            //    Response.Write("写入xls成功");
            //}
            //else
            //{
            //    Response.Write("写入xls失败");
            //}
            //connc.Close();
            //Response.ContentType = "application/vnd.ms-excel";
            //Response.AddHeader("content-disposition", "attchment;filename=aaa.zip");
            //FileStream fs = new FileStream(Server.MapPath("content/temp.xls"), FileMode.Open, FileAccess.Read, FileShare.Read);
            //Stream st = Response.OutputStream;
            //byte[] bt = new byte[102400];
            //while (true)
            //{
            //    int len = fs.Read(bt, 0, bt.Length);
            //    if (len == 0) break;
            //    st.Write(bt, 0, len);
            //    Response.Flush();
            //} fs.Close();
            //Response.End();

            ////3把data.xls发送出去

            #endregion
        }
        //预览
        protected void Button1_Click(object sender, EventArgs e)
        {
            BindList();
        }
        //导入
        protected void Button3_Click(object sender, EventArgs e)
        {
           //1.选择的文件上传到服务器的文件夹
            string type = Path.GetExtension(FileUpload1.FileName);
            string fileNamae = "content/" +FileUpload1.FileName;
            //保存
            FileUpload1.SaveAs(Server.MapPath(fileNamae));
                
            //2.把刚上传的这个excel文件中的内容查询出来
            string id = "";
            string name = "";
            string sex = "";
            int i = 0;
            string sql = "select * from [Sheet1$]";
            OleDbConnection conn = new OleDbConnection(connStr);
            conn.Open();
            OleDbCommand cmd = new OleDbCommand(sql,conn);
            OleDbDataAdapter da = new OleDbDataAdapter(cmd);
            DataSet ds=new DataSet();
            da.Fill(ds, "aa");
            DataTable dt = ds.Tables["aa"];
           
            foreach (DataRow item in dt.Rows)
            {
                id = item["编号"].ToString();
                name = item["姓名"].ToString();
                sex = item["性别"].ToString();

                
                string sqli = "insert into sheet1 values(@a,@b,@c)";
                SqlConnection conni = new SqlConnection(connS);
                conni.Open();
                SqlCommand cmdi = new SqlCommand(sqli, conni);
                SqlParameter[] pm = new SqlParameter[3];
                pm[0] = new SqlParameter("@a", id);
                pm[1] = new SqlParameter("@b", name);
                pm[2] = new SqlParameter("@c", sex);
                foreach (SqlParameter item1 in pm)
                {
                    cmdi.Parameters.Add(item1);
                }
               i+= cmdi.ExecuteNonQuery();
               conni.Close();
            }
            if (i>1)
            {
                Response.Write("导入成功");
            }
            else
            {
                Response.Write("导入失败");
            }
            
            conn.Close();
            //一条条的插入列sqlserver数据库中
            
            
          
        }
    }
}