无法更新。数据库或对象是只读的。在asp.net和访问

Question

我正在尝试通过asp.net上传excel表并在access db中创建一个新表。在访问中创建表时，工作表正在上传正确接收错误消息。

错误：无法更新。数据库或对象是只读的。在asp.net和访问

以下是代码：

webform2.aspx.cs

using System;
using System.Collections;
using System.Configuration;
using System.Data;
using System.Linq;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.HtmlControls;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Xml.Linq;
using System.IO;
using System.Collections.Generic;
using System.Data.OleDb;
using System.Data.Common;

namespace SmartTool
{

    public partial class WebForm2 : System.Web.UI.Page
    {
        protected void Page_Load(object sender, EventArgs e)
        {
          if (!IsPostBack)
            {
                string[] filePaths = Directory.GetFiles(Server.MapPath("~/Uploads/"));
                List<ListItem> files = new List<ListItem>();
                foreach (string filePath in filePaths)
                {
                    files.Add(new ListItem(Path.GetFileName(filePath), filePath));
                }
                GridView1.DataSource = files;
                GridView1.DataBind();
            }

        }
        protected void UploadFile(object sender, EventArgs e)
        {
            string fileName = Path.GetFileName(FileUpload1.PostedFile.FileName);
            FileUpload1.PostedFile.SaveAs(Server.MapPath("~/Uploads/") + fileName);
            Response.Redirect(Request.Url.AbsoluteUri);


        }
        protected void DownloadFile(object sender, EventArgs e)
        {
            string filePath = (sender as LinkButton).CommandArgument;
            Response.ContentType = ContentType;
            Response.AppendHeader("Content-Disposition", "attachment; filename=" + Path.GetFileName(filePath));
            Response.WriteFile(filePath);
            Response.End();
        }
        protected void DeleteFile(object sender, EventArgs e)
        {
            string filePath = (sender as LinkButton).CommandArgument;
            File.Delete(filePath);
            Response.Redirect(Request.Url.AbsoluteUri);
        }
        protected void ViewFile(object sender, EventArgs e)
        {
            string filePath = (sender as LinkButton).CommandArgument;
           // File.ReadAllLines(filePath);
            //GridView2.DataSource = File.ReadAllLines(filePath);
            //GridView2.DataBind();
            //string[] content = File.ReadAllLines(filePath);

            //GridView2.DataSource = content.
           // OleDbConnection conn = new OleDbConnection();
           // conn.ConnectionString = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=C:/Users/poonamj/Documents/Visual Studio 2008/Projects/SmartTool/SmartTool/fallout.accdb;User id=admin;Password=";
           // conn.Open();

            string Access = Server.MapPath("App_Data/fallout.accdb");
            string Excel = Server.MapPath(Path.GetFileName(filePath));
            string connect = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + Excel + ";Extended Properties=Excel 8.0;Mode=12;";
            using (OleDbConnection conn = new OleDbConnection(connect))
            {
                try
                {
                    conn.Open();
                    using (OleDbCommand cmd = new OleDbCommand())
                    {
                        cmd.Connection = conn;
                        cmd.CommandText = "SELECT * INTO [MS Access;Database=" + Access + "].[New Table] FROM [Sheet1$]";
                        Label1.Text = "Data copied to database";
                        cmd.ExecuteNonQuery();
                        conn.Close();
                    }
                }
                catch(DbException ex)
                {
                     //Console.WriteLine("Exception: {0}\r\n   Stack Trace: {1}", ex.Message, ex.StackTrace);  
                    Label1.Text = ex.Message;
                }
                finally
                {
                    conn.Close();
                }
            }

        }





    }
}

webform2.aspx：

<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="WebForm2.aspx.cs" Inherits="SmartTool.WebForm2"  %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
    <title>Untitled Page</title>
</head>
<body>
    <form id="form1" runat="server">
    <div>

    </div>
    <asp:FileUpload ID="FileUpload1" runat="server" />
<asp:Button ID="btnUpload" runat="server" Text="Upload" OnClick="UploadFile" />
<asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="False" 
        EmptyDataText = "No files uploaded"  >
    <Columns>
        <asp:BoundField DataField="Text" HeaderText="File Name" />
        <asp:TemplateField>
            <ItemTemplate>
                <asp:LinkButton ID="lnkDownload" Text = "Download" CommandArgument = '<%# Eval("Value") %>' runat="server" OnClick = "DownloadFile"></asp:LinkButton>
            </ItemTemplate>
        </asp:TemplateField>
        <asp:TemplateField>
            <ItemTemplate>
                <asp:LinkButton ID = "lnkDelete" Text = "Delete" CommandArgument = '<%# Eval("Value") %>' runat = "server" OnClick = "DeleteFile" />
            </ItemTemplate>
        </asp:TemplateField>
         <asp:TemplateField>
            <ItemTemplate>
                <asp:LinkButton ID = "lnkView" Text = "View" CommandArgument = '<%# Eval("Value") %>' runat = "server" OnClick = "ViewFile" />
            </ItemTemplate>
        </asp:TemplateField>
    </Columns>
</asp:GridView>
    <asp:SqlDataSource ID="SqlDataSource1" runat="server" 
        ConnectionString="<%$ ConnectionStrings:ConnectionString %>" 
        ProviderName="<%$ ConnectionStrings:ConnectionString.ProviderName %>" 
        SelectCommand="SELECT * FROM [Sheet1]"></asp:SqlDataSource>
<hr />

    <asp:Label ID="Label1" runat="server" Text="Label"></asp:Label>

    </form>
</body>
</html>