ASP.NET Excel 文件導入與導出實例
阿新 • • 發佈：2017-10-11
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話不多說直接來幹貨。。。。
連接類 Excel 通過 OleDb 類進行操作。
1 using System; 2 using System.Collections.Generic; 3 using System.Linq; 4 using System.Web; 5 using System.Data.OleDb; 6 7 /// <summary> 8 /// ExcelHelper 的摘要說明 9 /// </summary> 10 public class ExcelHelper 11 { 12 private OleDbConnection conn;ExcelHelper13 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);//操作的文件路徑早調用對象時給定 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 usingMysqlHelperSystem.Web; 5 using MySql.Data.MySqlClient; 6 /// <summary> 7 /// MysqlHelper 的摘要說明 8 /// </summary> 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 }
數據操作類
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 /// <summary> 9 /// ExcelDao 的摘要說明 10 /// </summary> 11 public class ExcelDao 12 { 13 public ExcelDao() 14 { 15 16 } 17 /// <summary> 18 /// 查詢 Excel 中的數據並存入數據表中 19 /// </summary> 20 /// <param name="connStr">連接字符串</param> 21 /// <param name="sql">sql命令</param> 22 /// <returns>返回一個數據表</returns> 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 /// <summary> 33 /// 將數據插入 Excel 中 34 /// </summary> 35 /// <param name="sql">sql命令</param> 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["學號"].ToString(); 41 string name = item["姓名"].ToString(); 42 string sex = item["性別"].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 }ExcelDao
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 /// <summary> 9 /// MysqlDao 的摘要說明 10 /// </summary> 11 public class MysqlDao 12 { 13 public MysqlDao() 14 { 15 // 16 // TODO: 在此處添加構造函數邏輯 17 // 18 } 19 /// <summary> 20 /// 查詢數據庫中的數據並存入數據表中 21 /// </summary> 22 /// <param name="conn"></param> 23 /// <param name="sql"></param> 24 /// <returns>返回一個數據表</returns> 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 /// <summary> 35 /// 將數據表插入到數據庫中 36 /// </summary> 37 /// <param name="conn"></param> 38 /// <param name="sql"></param> 39 /// <param name="item"></param> 40 /// <param name="i"></param> 41 /// <returns></returns> 42 public int Insert(MySqlConnection conn,string sql,DataRow item,int i) 43 { 44 string id = item["學號"].ToString(); 45 string name = item["姓名"].ToString(); 46 string sex = item["性別"].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 }MysqlDao
前端頁面
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="導入" 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="預覽數據庫中的數據" Width="224px" OnClick="Button2_Click" /> 32 <asp:Button ID="Button3" runat="server" Text="導出" 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>View Code
後臺實現代碼
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/學生.xlsx"); 20 ehelper = new ExcelHelper(fileName); 21 } 22 /// <summary> 23 /// 預覽數據庫中的數據 24 /// </summary> 25 /// <param name="sender"></param> 26 /// <param name="e"></param> 27 protected void Button2_Click(object sender, EventArgs e) 28 { 29 GridDataSource(); 30 } 31 /// <summary> 32 /// 加載數據源 33 /// </summary> 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 /// <summary> 47 /// 導入 48 /// </summary> 49 /// <param name="sender"></param> 50 /// <param name="e"></param> 51 protected void Button1_Click(object sender, EventArgs e) 52 { 53 //1. 選擇文件上傳到服務器的文件夾 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. 把剛上傳的excel文件中的內容查詢出來 60 61 int i = 0; 62 string sql = "select * from [Sheet1$]"; 63 ehelper.Conn.Open(); 64 ExcelDao dao = new ExcelDao(); 65 DataTable dt = dao.FindAll(ehelper.Conn, sql); 66 if(dt.Equals(null)) Response.Write("dt = null"); 67 foreach(DataRow item in dt.Rows) 68 {//將Excel中的內容存入緩存中，一條條插入mysql數據庫中 69 if (item.IsNull(0)) continue; 70 string msql = "insert into students values(@a,@b,@c)"; 71 mhelper = new MysqlHelper(); 72 mhelper.Conn.Open(); 73 MysqlDao dao1 = new MysqlDao(); 74 i = dao1.Insert(mhelper.Conn, msql, item, i); 75 mhelper.Conn.Close(); 76 } 77 if (i > 1) 78 Response.Write("導入成功"); 79 else 80 Response.Write("導入失敗"); 81 ehelper.Conn.Close(); 82 } 83 /// <summary> 84 /// 導出 85 /// </summary> 86 /// <param name="sender"></param> 87 /// <param name="e"></param> 88 protected void Button3_Click(object sender, EventArgs e) 89 { 90 //1. 復制一份模板 91 string oldPath = Server.MapPath("Down/學生.xlsx"); 92 string newPath = Server.MapPath("Down/學生2.xlsx"); 93 if (System.IO.File.Exists(newPath)) 94 { 95 System.IO.File.Delete(newPath); 96 } 97 System.IO.File.Copy(oldPath, newPath); 98 //2. 查詢數據表 99 string sql = "select * from students"; 100 mhelper = new MysqlHelper(); 101 mhelper.Conn.Open(); 102 MysqlDao dao = new MysqlDao(); 103 DataTable dt = dao.FindAll(mhelper.Conn, sql); 104 // 3. 將數據插入到表格中 105 int i = 0; 106 foreach (DataRow item in dt.Rows) 107 { 108 if (item.IsNull(0)) continue; 109 string esql = "insert into [Sheet1$] 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 // 將數據導出到Excel文件後下載 117 Down(newPath);//下載操作 118 } 119 /// <summary> 120 /// 下載導出的文件 121 /// </summary> 122 /// <param name="newPath"></param> 123 protected void Down(string newPath) 124 { 125 Response.ContentType = "application / vnd.ms - excel"; 126 Response.AddHeader("content-disposition", "attchment;filename=學生信息.xlsx"); 127 FileStream fs = new FileStream(newPath, FileMode.Open, FileAccess.Read); 128 Stream st = Response.OutputStream; 129 byte[] bt = new byte[102400];//100k位單位減輕服務器壓力 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 }Excel
這樣就可以達到對 Excel 文件導入與導出的效果了。這只是簡單的實現，邏輯不完全，歡迎大家指正！
ASP.NET Excel 文件導入與導出實例