【asp.net】asp.net实现上传Excel文件并读取数据

#前台代码:使用服务端控件实现上传

1     <form id="form1" runat="server">
2         <div>
3             <asp:FileUpload ID="ExcelFileUpload" runat="server" />
4             <asp:Button ID="UploadBtn" runat="server" Text="确定上传" OnClick="UploadBtn_Click" />
5         </div>
6     </form>

 #服务端代码:

 1 protected void UploadBtn_Click(object sender, EventArgs e)
 2 {
 3     if (ExcelFileUpload.HasFile == false)//HasFile用来检查FileUpload是否有文件
 4     {
 5         Response.Write("<script>alert('请您选择Excel文件')</script> ");
 6         return;//当无文件时,返回
 7     }
 8     string IsXls = Path.GetExtension(ExcelFileUpload.FileName).ToString().ToLower();//System.IO.Path.GetExtension获得文件的扩展名
 9     if (IsXls != ".xlsx" && IsXls != ".xls")
10     {
11         Response.Write(ExcelFileUpload.FileName);
12         Response.Write("<script>alert('只可以选择Excel文件')</script>");
13         return;//当选择的不是Excel文件时,返回
14     }
15 
16     string filename = ExcelFileUpload.FileName;//获取Execle文件名 
17     string savePath = Server.MapPath(("UploadExcel\\") + filename);//Server.MapPath 服务器上的指定虚拟路径相对应的物理文件路径
18     //savePath ="D:\vsproject\Projects\exceltestweb\exceltestweb\uploadfiles\test.xls"
19     //Response.Write(savePath);
20     DataTable ds = new DataTable();
21     ExcelFileUpload.SaveAs(savePath);//将文件保存到指定路径
22 
23     DataTable dt = GetExcelDatatable(savePath);//读取excel数据
24     List<RegNumInfo> regList = ConvertDtToInfo(dt);//将datatable转为list
25     File.Delete(savePath);//删除文件
26 
27     Response.Write("<script>alert('上传文件读取数据成功!');</script>");
28 }
29 /// <summary>
30 /// 从excel文件中读取数据
31 /// </summary>
32 /// <param name="fileUrl">实体文件的存储路径</param>
33 /// <returns></returns>
34 private static DataTable GetExcelDatatable(string fileUrl)
35 {
36     //支持.xls和.xlsx,即包括office2010等版本的;HDR=Yes代表第一行是标题,不是数据;
37     string cmdText = "Provider=Microsoft.ACE.OLEDB.12.0;Data Source=" + fileUrl + "; Extended Properties=\"Excel 12.0;HDR=Yes\"";
38     System.Data.DataTable dt = null;
39     //建立连接
40     OleDbConnection conn = new OleDbConnection(cmdText);
41     try
42     {
43         //打开连接
44         if (conn.State == ConnectionState.Broken || conn.State == ConnectionState.Closed)
45         {
46             conn.Open();
47         }
48 
49         System.Data.DataTable schemaTable = conn.GetOleDbSchemaTable(OleDbSchemaGuid.Tables, null);
50         string strSql = "select * from [Sheet1$]";   //这里指定表明为Sheet1,如果修改过表单的名称,请使用修改后的名称
51         OleDbDataAdapter da = new OleDbDataAdapter(strSql, conn);
52         DataSet ds = new DataSet();
53         da.Fill(ds);
54         dt = ds.Tables[0]; ;
55         return dt;
56     }
57     catch (Exception exc)
58     {
59         throw exc;
60     }
61     finally
62     {
63         conn.Close();
64         conn.Dispose();
65     }
66 }
67 /// <summary>
68 /// 将datatable转换为list集合
69 /// </summary>
70 /// <param name="dt">DataTable</param>
71 /// <returns></returns>
72 private static List<RegNumInfo> ConvertDtToInfo(DataTable dt)
73 {
74     List<RegNumInfo> list = new List<RegNumInfo>();
75     if (dt.Rows.Count > 0)
76     {
77         foreach (DataRow item in dt.Rows)
78         {
79             RegNumInfo info = new RegNumInfo();
80             info.RegNum = item[0].ToString();
81             info.Name = item[1].ToString();
82             info.Period = item[2].ToString();
83             info.Remark = item[3].ToString();
84             list.Add(info);
85         }
86     }
87     return list;
88 }

 

1 public class RegNumInfo
2 {
3     public string RegNum { get; set; }
4     public string Name { get; set; }
5     public string Period { get; set; }
6     public string Remark { get; set; }
7 }

 

#注意:出现“未在本地计算机上注册“microsoft.ACE.oledb.12.0”提供程序” 的报错的解决方案

  1、因为读取excel文件使用的是OleDb,如果服务器没有安装office,需要安装数据访问组件(AccessDatabaseEngine);

    *适用于office2010的

    Microsoft Access Database Engine 2010 Redistributable

  2、在IIS应用程序池中,设置“”启用兼容32位应用程序”;

解决方案具体可参考这篇文章:https://www.cnblogs.com/willingtolove/p/9630485.html

 

#参考:

https://blog.csdn.net/eagle_or_snail/article/details/82748226

https://www.cnblogs.com/willingtolove/p/9630485.html

 

posted @ 2019-03-06 14:22  willingtolove  阅读(8503)  评论(0编辑  收藏  举报