从GridView导出的Excel文件无法使用C＃再次导入GridView？

Question

我有.aspx页面，其中包含GridView和asp.net按钮，用于将GridView导出到Excel。一切正常。就是当我将GridView导出到Excel（。xls）时，所有行都会被导出。

Excel文件包含产品价格。这些价格由用户Updated提供，稍后在Uploaded到GridView，因此产品的价格会更新到数据库。

当我尝试将Exported Excel(.xls)上传到GridView时，它表示＆＃39; 错误：外部表格不是预期的格式＆＃39;。但是当使用选项＆＃39; SAVE AS＆＃39;保存相同的文件时它工作正常。

有什么建议吗？

将GridView导出到Excel（.xls）

protected void btnExportEdit_Click(object sender, EventArgs e)
    {

        GridView2.AllowPaging = false;
        GridView2.AllowSorting = false;
        Response.Clear();
        Response.AddHeader("content-disposition", "attachment;filename=TeraPeakDevicePrices_Edit.xls");
        Response.Charset = "";

        Response.ContentType = "application/vnd.xls";
        //Response.ContentType = "application/text";
        System.IO.StringWriter stringWrite = new System.IO.StringWriter();
        System.Web.UI.HtmlTextWriter htmlWrite =
        new HtmlTextWriter(stringWrite);


        GridView2.DataSourceID = sqlUsers.ID;//sqlDevicePriceListExport.ID;
        GridView2.DataBind();

        StringWriter sWriter = new StringWriter();
        HtmlTextWriter hWriter = new HtmlTextWriter(sWriter); GridView2.RenderControl(hWriter);
        string style = @"<style> .textmode {mso-number-format:General} </style>";
        Response.Write(style);
        Response.Write(sWriter.ToString());
        Response.Flush(); Response.End();


    }

将导出的Excel（.xls）上传到GridView。

using System.Data.OleDb;
protected void btnUploadOLD_Click(object sender, EventArgs e)
    {
        if (fupCSV.HasFile)
        {
            try
            {
                OleDbConnection objConn = null;
                string fileSavePath = "";
                fileSavePath = CommonFunc.GetFileName(Path.Combine(Server.MapPath("~/" + "UploadedFiles"), fupCSV.FileName));
                fupCSV.SaveAs(fileSavePath);
                hdnFileUploaded.Value = fileSavePath;
                var connectionString = string.Format("Provider=Microsoft.ACE.OLEDB.12.0;Data Source={0}; Extended Properties=Excel 12.0;", fileSavePath);
                objConn = new OleDbConnection(connectionString);
                objConn.Open();
                DataTable columndt = objConn.GetOleDbSchemaTable(OleDbSchemaGuid.Tables, null);
                String[] excelSheets = new String[columndt.Rows.Count];
                if (columndt.Rows.Count > 0)
                {
                    int i = 0;
                    // Add the sheet name to the string array.
                    foreach (DataRow row in columndt.Rows)
                    {
                        excelSheets[i] = row["TABLE_NAME"].ToString();
                        i++;
                    }
                }

               // var adapter = new OleDbDataAdapter("SELECT * FROM [" + excelSheets[0] + "] where [Sales Record Number] is not null", connectionString);
                //SMS:
                var adapter = new OleDbDataAdapter("SELECT * FROM [" + excelSheets[0] + "] ", connectionString);
                var ds = new DataSet();
                objConn.Close();
                adapter.Fill(ds, "anyNameHere");

                DataTable data = ds.Tables["anyNameHere"];
                if (data != null && data.Rows.Count > 0)
                {
                    btnUpdateChanges.Visible = true;
                }
                else {
                    btnUpdateChanges.Visible = false;
                }

                gvExcelFile.DataSource = data.DefaultView.ToTable();
                gvExcelFile.DataBind();
            }
            catch (Exception ex)
            {

            }
        }
    }

帮助感谢！