c# - 如何通过 c# 从 asp.net 中的 excel 文件加载 gridview？

Question

我尝试从 excel 文件加载一个 gridview。但是我得到了这个错误

Microsoft Jet 数据库引擎“Sheet1 $”找不到对象。确保该对象存在并且其名称和路径拼写正确。

这一行有一个错误:excelDataAdapter.Fill(dt);

我在 App_Data 文件夹中有一个 .xls 文件。Wh

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




namespace Excell
{
public partial class LoadExcelToGrid: System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
       gv.DataSource = exceldata(Server.MapPath("~/data.xls"));
       gv.DataBind();
    }
    public static DataSet exceldata(string filelocation)
    {
        DataSet ds = new DataSet();
        OleDbCommand excelCommand = new OleDbCommand(); OleDbDataAdapter excelDataAdapter = new 
 OleDbDataAdapter();
        string excelConnStr = "Provider=Microsoft.Jet.OLEDB.4.0; Data Source=" + filelocation + 
"; Extended Properties=Excel 8.0;";
        OleDbConnection excelConn = new OleDbConnection(excelConnStr);
        excelConn.Open();
        DataTable dt = new DataTable();
        excelCommand = new OleDbCommand("Select * from [Sheet1$]", excelConn);
        excelDataAdapter.SelectCommand = excelCommand;
        excelDataAdapter.Fill(dt);

        ds.Tables.Add(dt);

        return ds;
    }


}
}

Answer 1

此代码适用于我。

protected void btnUpload_Click(object sender, EventArgs e)
{
String strConnection = "ConnectionString";
string connectionString ="";
if (FileUpload1.HasFile)
{
    string fileName = Path.GetFileName(FileUpload1.PostedFile.FileName);
    string fileExtension = Path.GetExtension(FileUpload1.PostedFile.FileName);
    string fileLocation = Server.MapPath("~/App_Data/" + fileName);
    FileUpload1.SaveAs(fileLocation); 
    if (fileExtension == ".xls")
    {
        connectionString = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + 
          fileLocation + ";Extended Properties=\"Excel 8.0;HDR=Yes;IMEX=2\""; 
    }
    else if (fileExtension == ".xlsx")
    {
        connectionString = "Provider=Microsoft.ACE.OLEDB.12.0;Data Source=" + 
          fileLocation + ";Extended Properties=\"Excel 12.0;HDR=Yes;IMEX=2\"";
    } 
    OleDbConnection con = new OleDbConnection(connectionString);
    OleDbCommand cmd = new OleDbCommand();
    cmd.CommandType = System.Data.CommandType.Text;
    cmd.Connection = con;
    OleDbDataAdapter dAdapter = new OleDbDataAdapter(cmd);
    DataTable dtExcelRecords = new DataTable();
    con.Open();
    DataTable dtExcelSheetName = con.GetOleDbSchemaTable(OleDbSchemaGuid.Tables, null);
    string getExcelSheetName = dtExcelSheetName.Rows[0]["Table_Name"].ToString();
    cmd.CommandText = "SELECT * FROM [" + getExcelSheetName +"]";
    dAdapter.SelectCommand = cmd;
    dAdapter.Fill(dtExcelRecords); 
    GridView1.DataSource = dtExcelRecords;
    GridView1.DataBind(); 
}