话不多说直接来干货。。。。
连接类 Excel 通过 OleDb 类进行操作。
1 using System; 2 using System.Collections.Generic; 3 using System.Linq; 4 using System.Web; 5 using System.Data.OleDb; 6 7 ///8 /// ExcelHelper 的摘要说明 9 /// 10 public class ExcelHelper 11 { 12 private OleDbConnection conn; 13 private string connStr = "Provider=Microsoft.Ace.OleDb.12.0;Data Source={0};Extended Properties='Excel 12.0;HDR=yes'"; 14 public ExcelHelper(string fileName) 15 { 16 connStr = string.Format(connStr, fileName);//操作的文件路径早调用对象时给定 17 Conn = new OleDbConnection(connStr); 18 } 19 20 public OleDbConnection Conn 21 { 22 get 23 { 24 return conn; 25 } 26 27 set 28 { 29 conn = value; 30 } 31 } 32 }
1 using System; 2 using System.Collections.Generic; 3 using System.Linq; 4 using System.Web; 5 using MySql.Data.MySqlClient; 6 ///7 /// MysqlHelper 的摘要说明 8 /// 9 public class MysqlHelper 10 { 11 private MySqlConnection conn; 12 private string connection = "Data Source = 127.0.0.1;User ID = root;Password=123;Database=students;Charset=utf8"; 13 public MysqlHelper() 14 { 15 Conn = new MySqlConnection(connection); 16 } 17 18 public MySqlConnection Conn 19 { 20 get 21 { 22 return conn; 23 } 24 25 set 26 { 27 conn = value; 28 } 29 } 30 }
数据操作类
1 using System; 2 using System.Collections.Generic; 3 using System.Linq; 4 using System.Web; 5 using System.Data.OleDb; 6 using System.Data; 7 8 ///9 /// ExcelDao 的摘要说明 10 /// 11 public class ExcelDao 12 { 13 public ExcelDao() 14 { 15 16 } 17 /// 18 /// 查询 Excel 中的数据并存入数据表中 19 /// 20 /// 连接字符串 21 /// sql命令 22 /// 返回一个数据表 23 public DataTable FindAll(OleDbConnection ocon, string sql) 24 { 25 OleDbCommand ocmd = new OleDbCommand(sql, ocon); 26 OleDbDataAdapter da = new OleDbDataAdapter(ocmd); 27 DataSet ds = new DataSet(); 28 da.Fill(ds, "aa"); 29 DataTable dt = ds.Tables["aa"]; 30 return dt; 31 } 32 /// 33 /// 将数据插入 Excel 中 34 /// 35 /// sql命令 36 public void Insert(OleDbConnection coon,string sql,DataRow item,int i) 37 { 38 OleDbParameter[] pms = new OleDbParameter[3]; 39 OleDbCommand ocmd = new OleDbCommand(sql, coon); 40 string id = item["学号"].ToString(); 41 string name = item["姓名"].ToString(); 42 string sex = item["性别"].ToString(); 43 44 pms[0] = new OleDbParameter("@a", id); 45 pms[1] = new OleDbParameter("@b", name); 46 pms[2] = new OleDbParameter("@c", sex); 47 48 foreach(OleDbParameter iteme in pms) 49 { 50 ocmd.Parameters.Add(iteme); 51 } 52 i += ocmd.ExecuteNonQuery(); 53 } 54 }
1 using System; 2 using System.Collections.Generic; 3 using System.Linq; 4 using System.Web; 5 using System.Data; 6 using MySql.Data.MySqlClient; 7 8 ///9 /// MysqlDao 的摘要说明 10 /// 11 public class MysqlDao 12 { 13 public MysqlDao() 14 { 15 // 16 // TODO: 在此处添加构造函数逻辑 17 // 18 } 19 /// 20 /// 查询数据库中的数据并存入数据表中 21 /// 22 /// 23 /// 24 /// 返回一个数据表 25 public DataTable FindAll(MySqlConnection conn,string sql) 26 { 27 MySqlCommand cmd = new MySqlCommand(sql, conn); 28 MySqlDataAdapter da = new MySqlDataAdapter(cmd); 29 DataSet ds = new DataSet(); 30 da.Fill(ds, "bb"); 31 DataTable dt = ds.Tables["bb"]; 32 return dt; 33 } 34 /// 35 /// 将数据表插入到数据库中 36 /// 37 /// 38 /// 39 /// 40 /// 41 /// 42 public int Insert(MySqlConnection conn,string sql,DataRow item,int i) 43 { 44 string id = item["学号"].ToString(); 45 string name = item["姓名"].ToString(); 46 string sex = item["性别"].ToString(); 47 MySqlCommand cmd = new MySqlCommand(sql, conn); 48 MySqlParameter[] pm = new MySqlParameter[3]; 49 50 pm[0] = new MySqlParameter("@a", id); 51 pm[1] = new MySqlParameter("@b", name); 52 pm[2] = new MySqlParameter("@c", sex); 53 54 foreach (MySqlParameter item1 in pm) 55 { 56 cmd.Parameters.Add(item1); 57 } 58 i += cmd.ExecuteNonQuery(); 59 return i; 60 } 61 public MySqlDataReader FindAllReader(string sql,MySqlConnection conn) 62 { 63 MySqlCommand cmd = new MySqlCommand(sql, conn); 64 MySqlDataReader dr = cmd.ExecuteReader(); 65 return dr; 66 } 67 }
前端页面
1 <%@ Page Language="C#" AutoEventWireup="true" CodeFile="Excel.aspx.cs" Inherits="Excel" %> 2 3 DOCTYPE html> 4 5 <html xmlns="http://www.w3.org/1999/xhtml"> 6 <head runat="server"> 7 <meta http-equiv="Content-Type" content="text/html; charset=utf-8"/> 8 <title>title> 9 <style type="text/css"> 10 .auto-style1 { 11 width: 100%; 12 } 13 .auto-style2 { 14 width: 372px; 15 } 16 style> 17 head> 18 <body> 19 <form id="form1" runat="server"> 20 <div> 21 22 <table class="auto-style1"> 23 <tr> 24 <td class="auto-style2">Excel文件：<asp:FileUpload ID="FileUpload1" runat="server" /> 25 <asp:Button ID="Button1" runat="server" Text="导入" OnClick="Button1_Click" /> 26 td> 27 <td> td> 28 tr> 29 <tr> 30 <td class="auto-style2"> 31 <asp:Button ID="Button2" runat="server" Text="预览数据库中的数据" Width="224px" OnClick="Button2_Click" /> 32 <asp:Button ID="Button3" runat="server" Text="导出" OnClick="Button3_Click" /> 33 td> 34 <td> td> 35 tr> 36 table> 37 38 div> 39 <asp:GridView ID="GridView1" runat="server" BackColor="White" BorderColor="#CCCCCC" BorderStyle="None" BorderWidth="1px" CellPadding="4" Width="262px" ForeColor="Black" GridLines="Horizontal"> 40 <FooterStyle BackColor="#CCCC99" ForeColor="Black" /> 41 <HeaderStyle BackColor="#333333" Font-Bold="True" ForeColor="White" /> 42 <PagerStyle BackColor="White" ForeColor="Black" HorizontalAlign="Right" /> 43 <SelectedRowStyle BackColor="#CC3333" Font-Bold="True" ForeColor="White" /> 44 <SortedAscendingCellStyle BackColor="#F7F7F7" /> 45 <SortedAscendingHeaderStyle BackColor="#4B4B4B" /> 46 <SortedDescendingCellStyle BackColor="#E5E5E5" /> 47 <SortedDescendingHeaderStyle BackColor="#242121" /> 48 asp:GridView> 49 form> 50 body> 51 html>
后台实现代码
1 using System; 2 using System.Collections.Generic; 3 using System.Linq; 4 using System.Web; 5 using System.Web.UI; 6 using System.Web.UI.WebControls; 7 using MySql.Data.MySqlClient; 8 using System.Data.OleDb; 9 using System.Data; 10 using System.IO; 11 12 public partial class Excel : System.Web.UI.Page 13 { 14 ExcelHelper ehelper; 15 MysqlHelper mhelper; 16 protected void Page_Load(object sender, EventArgs e) 17 { 18 GridDataSource(); 19 string fileName = Server.MapPath("Down/学生.xlsx"); 20 ehelper = new ExcelHelper(fileName); 21 } 22 ///23 /// 预览数据库中的数据 24 /// 25 /// 26 /// 27 protected void Button2_Click(object sender, EventArgs e) 28 { 29 GridDataSource(); 30 } 31 /// 32 /// 加载数据源 33 /// 34 protected void GridDataSource() 35 { 36 mhelper = new MysqlHelper(); 37 mhelper.Conn.Open(); 38 string sql = "select * from students"; 39 MysqlDao dao = new MysqlDao(); 40 MySqlDataReader dr = dao.FindAllReader(sql, mhelper.Conn); 41 GridView1.DataSource = dr; 42 GridView1.DataBind(); 43 dr.Close(); 44 mhelper.Conn.Close(); 45 } 46 /// 47 /// 导入 48 /// 49 /// 50 /// 51 protected void Button1_Click(object sender, EventArgs e) 52 { 53 //1. 选择文件上传到服务器的文件夹 54 string type = Path.GetExtension(FileUpload1.FileName); 55 string filePath = "Down/"+FileUpload1.FileName; 56 //fileName = filePath; 57 FileUpload1.SaveAs(Server.MapPath(filePath)); 58 59 //2. 把刚上传的excel文件中的内容查询出来 60 61 int i = 0; 62 string sql = "select * from [Sheet1$]"; 63 ehelper.Conn.Open(); 64 ExcelDao dao = new ExcelDao(); 65 DataTable dt = dao.FindAll(ehelper.Conn, sql); 66 if(dt.Equals(null)) Response.Write("dt = null"); 67 foreach(DataRow item in dt.Rows) 68 {//将Excel中的内容存入缓存中，一条条插入mysql数据库中 69 if (item.IsNull(0)) continue; 70 string msql = "insert into students values(@a,@b,@c)"; 71 mhelper = new MysqlHelper(); 72 mhelper.Conn.Open(); 73 MysqlDao dao1 = new MysqlDao(); 74 i = dao1.Insert(mhelper.Conn, msql, item, i); 75 mhelper.Conn.Close(); 76 } 77 if (i > 1) 78 Response.Write("导入成功"); 79 else 80 Response.Write("导入失败"); 81 ehelper.Conn.Close(); 82 } 83 /// 84 /// 导出 85 /// 86 /// 87 /// 88 protected void Button3_Click(object sender, EventArgs e) 89 { 90 //1. 复制一份模板 91 string oldPath = Server.MapPath("Down/学生.xlsx"); 92 string newPath = Server.MapPath("Down/学生2.xlsx"); 93 if (System.IO.File.Exists(newPath)) 94 { 95 System.IO.File.Delete(newPath); 96 } 97 System.IO.File.Copy(oldPath, newPath); 98 //2. 查询数据表 99 string sql = "select * from students"; 100 mhelper = new MysqlHelper(); 101 mhelper.Conn.Open(); 102 MysqlDao dao = new MysqlDao(); 103 DataTable dt = dao.FindAll(mhelper.Conn, sql); 104 // 3. 将数据插入到表格中 105 int i = 0; 106 foreach (DataRow item in dt.Rows) 107 { 108 if (item.IsNull(0)) continue; 109 string esql = "insert into [Sheet1$] values(@a,@b,@c)"; 110 ehelper.Conn.Open(); 111 ExcelDao dao1 = new ExcelDao(); 112 dao1.Insert(ehelper.Conn, esql, item, i); 113 ehelper.Conn.Close(); 114 } 115 mhelper.Conn.Close(); 116 // 将数据导出到Excel文件后下载 117 Down(newPath);//下载操作 118 } 119 /// 120 /// 下载导出的文件 121 /// 122 /// 123 protected void Down(string newPath) 124 { 125 Response.ContentType = "application / vnd.ms - excel"; 126 Response.AddHeader("content-disposition", "attchment;filename=学生信息.xlsx"); 127 FileStream fs = new FileStream(newPath, FileMode.Open, FileAccess.Read); 128 Stream st = Response.OutputStream; 129 byte[] bt = new byte[102400];//100k位单位减轻服务器压力 130 while (true) 131 { 132 int len = fs.Read(bt, 0, bt.Length); 133 if (len == 0) break; 134 st.Write(bt, 0, len); 135 Response.Flush(); 136 } 137 st.Close(); 138 fs.Close(); 139 Response.End(); 140 } 141 }
这样就可以达到对 Excel 文件导入与导出的效果了。这只是简单的实现，逻辑不完全，欢迎大家指正！