System.Data.OleDb.OleDbException：它已由另一个用户独占打开，或者您需要获得查看和写入其数据的权限

Question

我正在尝试通过点击按钮从excel文件中读取数据，此文件在FileUpload1控件的帮助下浏览，但在打开OleDbConnection时我正在System.Data.OleDb.OleDbException ：“它已由其他用户专门打开，或者您需要获得查看和写入其数据的权限。”

下面的Web.config文件代码

<connectionStrings>
        <add name ="Excel03ConString"
       connectionString="Provider=Microsoft.Jet.OLEDB.4.0;Data Source={0};
                         Extended Properties='Excel 8.0;HDR={1}'"/>
      <add name ="Excel07ConString"
           connectionString="Provider=Microsoft.ACE.OLEDB.12.0;Data Source={0};
                         Extended Properties='Excel 8.0;HDR={1}'"/>    
</connectionStrings>

我尝试的代码是：

protected void btnUpload_Click(object sender, EventArgs e)
    {
        if (FileUpload1.HasFile)
        {
            string Extension = Path.GetExtension(FileUpload1.PostedFile.FileName);
            string FilePath = Server.MapPath("~/Files/");
            if (!Directory.Exists(FilePath))
            {
                //If Directory (Folder) does not exists. Create it.
                Directory.CreateDirectory(FilePath);
            }

            FileUpload1.SaveAs(FilePath + Path.GetFileName(FileUpload1.FileName));
            Import_To_Grid(FilePath, Extension, rbHDR.SelectedItem.Text);
        }
    }
    private void Import_To_Grid(string FilePath, string Extension, string isHDR)
    {
        string conStr = "";
        switch (Extension)
        {
            case ".xls": //Excel 97-03
                conStr = ConfigurationManager.ConnectionStrings["Excel03ConString"]
                         .ConnectionString;
                break;
            case ".xlsx": //Excel 07
                conStr = ConfigurationManager.ConnectionStrings["Excel07ConString"]
                          .ConnectionString;
                break;
        }
        conStr = String.Format(conStr, FilePath, isHDR);
        OleDbConnection connExcel = new OleDbConnection(conStr);
        OleDbCommand cmdExcel = new OleDbCommand();
        OleDbDataAdapter oda = new OleDbDataAdapter();
        DataTable dt = new DataTable();
        cmdExcel.Connection = connExcel;

        //Get the name of First Sheet
        connExcel.Open();
        DataTable dtExcelSchema;
        dtExcelSchema = connExcel.GetOleDbSchemaTable(OleDbSchemaGuid.Tables, null);
        string SheetName = dtExcelSchema.Rows[0]["TABLE_NAME"].ToString();
        connExcel.Close();
        //Read Data from First Sheet
        cmdExcel.CommandText = "SELECT * From [" + SheetName + "]";
        connExcel.Open();
        oda.SelectCommand = cmdExcel;
        oda.Fill(dt);
        connExcel.Close();

        //Bind Data to GridView
        GridView1.Caption = Path.GetFileName(FilePath);
        GridView1.DataSource = dt;
        GridView1.DataBind();
    }

请提前帮助我帮助我。