Ext.Net导入Excel

根据上传的Excel文件保存在指定目录：

protected void btnUpload_DirectClick(object sender, DirectEventArgs e)
        {
            string fileName = this.fileUploader.FileName;
            string extension = Path.GetExtension(fileName).ToUpper();
            byte[] content = this.fileUploader.FileBytes;
            if (extension == ".XLS"||extension==".XLSX")
            {
                if (!Directory.Exists(Server.MapPath("~/FileUpload/")))
                {
                    Directory.CreateDirectory(Server.MapPath("~/FileUpload/"));
                }
                try
                {
                    string filePath = Server.MapPath("~/FileUpload/") + DateTime.Now.ToString("yyyyMMddHHmmss") + extension;
                    fileUploader.PostedFile.SaveAs(filePath);
                    DataSet ds = ExcelHelper.LoadDataFromExcel(filePath);
                    DataTable tbData = ds.Tables[0];
                    for (int i = 0; i < tbData.Columns.Count; i++)
                    {
                        tbData.Columns[i].ColumnName = ExcelHelper.GetColumnName(tbData.Columns[i].ColumnName);
                    }
                    //storeUser.DataSource = ds.Tables[0];
                    //storeUser.DataBind();
                }
                catch (Exception ex)
                {
                    throw ex;
                }
            }
            else
            {
                X.MessageBox.Alert("提示", "文件格式不正确");
            }
        }

把Excel中的数据读取到DataSet中：

 /// <summary>
        /// 加载Excel数据
        /// </summary>
        /// <param name="filePath">文件路径</param>
        /// <returns>数据源</returns>
        public static DataSet LoadDataFromExcel(string filePath)
        {
            string connectionString = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + filePath + ";Extended Properties='Excel 8.0;HDR=False;IMEX=1'";
            OleDbConnection conn = new OleDbConnection(connectionString);
            conn.Open();
            String sql = "SELECT * FROM  [Sheet1$]";

            OleDbDataAdapter OleDaExcel = new OleDbDataAdapter(sql, conn);
            DataSet OleDsExcel = new DataSet();
            OleDaExcel.Fill(OleDsExcel, "Sheet1");
            conn.Close();

            return OleDsExcel;
        }