![Excel—— [导入到数据库] or 将数据 [导入到Excel]](https://image.shishitao.com:8440/aHR0cHM6Ly9ia3FzaW1nLmlrYWZhbi5jb20vdXBsb2FkL2NoYXRncHQtcy5wbmc%2FIQ%3D%3D.png?!?w=700&webp=1 "Excel—— [导入到数据库] or 将数据 [导入到Excel]")
将Excel导入到数据库实现如下：
前台代码:
@model IEnumerable<Model.Student>
@{
Layout = null;
} <!DOCTYPE html> <html>
<head>
<meta name="viewport" content="width=device-width" />
<title>Index</title>
<script src="~/js/jquery.min.js"></script>
<script>
function ExcInput()
{
location.href = "/Home/ExcInput";
}
</script>
</head>
<body>
<div>
<form action="/Home/Execl" method="post" enctype="multipart/form-data">
<input type="file" name="Exc" />
<input type="submit" value="导入" />
</form> <input type="submit" value="导出" onclick="ExcInput()"/>
<table id="table">
<tr>
<th>编号</th>
<th>姓名</th>
<th>年龄</th>
<th>性别</th>
</tr>
@foreach (var item in Model)
{
<tr>
<td>@item.id</td>
<td>@item.name</td>
<td>@item.age</td>
<td>@item.sex</td>
</tr>
}
</table>
</div>
</body>
</html>
后台代码：
/// <summary>
/// 初始化页面
/// </summary>
/// <returns></returns>
public ActionResult Index()
{
DAL.StudentDal dal = new DAL.StudentDal();
List<Student> ls = dal.GetStudentList();
return View(ls);
}
/// <summary>
/// Excel上传部分
/// 导入 Import
/// </summary>
/// <param name="Exc"></param>
/// <returns></returns>
[HttpPost]
public ActionResult Execl(HttpPostedFileBase Exc)
{
#region /// 上传部分 //如果当前的网站目录为E:\wwwroot 应用程序虚拟目录为E:\wwwroot\company 浏览的页面路径为E:\wwwroot\company\news\show.asp
//在show.asp页面中使用
//Server.MapPath("./") 返回路径为：E:\wwwroot\company\news
//Server.MapPath("/") 返回路径为：E:\wwwroot
//Server.MapPath("../") 返回路径为：E:\wwwroot\company
//Server.MapPath("~/") 返回路径为：E:\wwwroot\company string strfileName = Server.MapPath("/Word/"); //存储文件的地方 if (!Directory.Exists(strfileName)) //判断文件路径是否存在
{
Directory.CreateDirectory(strfileName);
}
string fName = Path.GetFileName(Exc.FileName); //获取文件名
Exc.SaveAs(strfileName + fName); #endregion #region /// Execl导入部分 //execl文件读取
ExcelDAL exc = new ExcelDAL();
DataTable dt = exc.ExcelToDS(strfileName + fName); //把读取的数据导入到数据库
DAL.StudentDal dal = new DAL.StudentDal();
foreach (DataRow dr in dt.Rows)
{
Student student = new Student();
student.id = Convert.ToInt32(dr[]);
student.name = dr[].ToString();
student.sex = dr[].ToString();
student.age = Convert.ToInt32(dr[]);
dal.Add(student);
} #endregion List<Student> ls = dal.GetStudentList();//查询出所有数据 return View("Index", ls);
}
Excel导入导出帮助类 ExcelDAL.cs
using System;
using System.Collections.Generic;
using System.Data;
using System.Linq;
using System.Text;
using System.Threading.Tasks; using Model;
using System.Data.OleDb; namespace DAL
{
/// <summary>
///
/// </summary>
public class ExcelDAL
{
/// <summary>
/// 将excel中的数据取出，填充到dataset中
/// </summary>
/// <param name="path"></param>
/// <returns></returns>
public DataTable ExcelToDS(string path)
{
string strConn = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + path + ";Extended Properties=Excel 8.0;"; OleDbConnection conn = new OleDbConnection(strConn);
OleDbDataAdapter oda = new OleDbDataAdapter("select * from [Sheet1$]", conn);
DataSet ds = new DataSet();
oda.Fill(ds);
return ds.Tables[];
} /// <summary>
/// 将单条数据插入到excel中
/// </summary>
/// <param name="path"></param>
/// <param name="e"></param>
/// <returns></returns>
public int ExcelToAdd(string path, Student student)
{
string strConn = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + path + ";Extended Properties=Excel 8.0;"; OleDbConnection conn = new OleDbConnection(strConn);
conn.Open();
string SQL = "INSERT INTO [Sheet2$] ([编号],[姓名],[性别],[年龄]) VALUES(" + student.id + ",'" + student.name + "','" + student.sex + "'," + student.age + ")";
OleDbCommand cmd = new OleDbCommand(SQL, conn);
int i = cmd.ExecuteNonQuery();
conn.Close();
conn.Dispose();
return i;
} /// <summary>
/// 通过循环将list中的数据插入到excel中
/// </summary>
/// <param name="path">excel的路径</param>
/// <param name="studentList">数据集合</param>
/// <returns></returns>
public int ExcelToAdd(string path, List<Student> studentList)
{
string strConn = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + path + ";Extended Properties=Excel 8.0;"; OleDbConnection conn = new OleDbConnection(strConn);
conn.Open(); OleDbCommand cmd = new OleDbCommand("CREATE TABLE [Sheet1] ([编号] INT,[姓名] Text,[性别] Text,[年龄] int)", conn);
cmd.ExecuteNonQuery(); foreach (Student e in studentList)
{
string SQL = "INSERT INTO [Sheet1$] ([编号],[姓名],[性别],[年龄]) VALUES(" + e.id + ",'" + e.name + "','" + e.sex + "'," + e.age + ")";
cmd = new OleDbCommand(SQL, conn);
int i = cmd.ExecuteNonQuery();
}
conn.Close();
conn.Dispose();
return ;
}
}
}
将数据库内容导出到Excel实现：
后台代码：
/// <summary>
/// 导出 export
/// </summary>
/// <returns></returns>
public ActionResult ExcInput()
{
#region /// 查询部分 DAL.StudentDal dal = new DAL.StudentDal();
List<Student> ls = dal.GetStudentList(); #endregion ExcelDAL exc = new ExcelDAL(); exc.ExcelToAdd("D:/studentDemo.xls", ls);
return View();
}
前台界面如下：
![Excel—— [导入到数据库] or 将数据 [导入到Excel]](https://image.shishitao.com:8440/aHR0cHM6Ly9pbWFnZXMyMDE1LmNuYmxvZ3MuY29tL2Jsb2cvNzk3MDg3LzIwMTcwNi83OTcwODctMjAxNzA2MTAyMzIyMjUzNzItMjA2MjA3MDAwNy5naWY%3D.gif?w=700&webp=1 "Excel—— [导入到数据库] or 将数据 [导入到Excel]")
需要注意的：
![Excel—— [导入到数据库] or 将数据 [导入到Excel]](https://image.shishitao.com:8440/aHR0cHM6Ly9pbWFnZXMyMDE1LmNuYmxvZ3MuY29tL2Jsb2cvNzk3MDg3LzIwMTcwNi83OTcwODctMjAxNzA2MTAyMzM3NDE2MDYtNzk5MDMxMTA2LmdpZg%3D%3D.gif?w=700&webp=1 "Excel—— [导入到数据库] or 将数据 [导入到Excel]")