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                合規國際互聯網加速 OSASE為企業客戶提供高速穩定SD-WAN國際加速解決方案。 廣告
                1)業務邏輯層:DynamicDataBusi.cs ~~~ using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Data; using MEntities; using System.Data.SqlClient; namespace BBusiness { ?? public class DynamicDataBusi ?? { ?????? public DynamicDataTable GetDynamicDataTable(string strSQL, string ConnStr) ?????? { ?????????? SqlConnection theConn = new SqlConnection(ConnStr); ?????????? DataTable theTable = new HDatabase.DynamicDataAccess().GetDataTable(strSQL, theConn); ?????????? DynamicDataTable theDynamicTable = new DynamicDataTable(); ?????????? if (theTable != null) ?????????? { ?????????????? foreach (DataColumn col in theTable.Columns) ?????????????? { ?????????????????? DynamicDataColumn theCol = new DynamicDataColumn(); ?????????????????? theCol.Caption = col.Caption; ?????????????????? theCol.DataType = col.DataType.Name; ?????????????????? theCol.FieldName = col.ColumnName; ?????????????????? theCol.Length = col.MaxLength; ?????????????????? theCol.FormatString = ""; ?????????????????? theDynamicTable.Columns.Add(theCol); ?????????????? } ?????????????? foreach (DataRow row in theTable.Rows) ?????????????? { ?????????????????? DynamicDataRow theRow = new DynamicDataRow(); ?????????????????? for (int i = 0; i < theTable.Columns.Count; i++) ?????????????????? { ?????????????????????? DynamicDataField theDataField = new DynamicDataField(); ?????????????????????? theDataField.FieldName = theTable.Columns[i].ColumnName; ?????????????????????? theDataField.DataType = theTable.Columns[i].DataType.Name; ?????????????????????? theDataField.Value = row[i]; ?????????????????????? theRow.DataFields.Add(theDataField); ?????????????????? } ?????????????????? theDynamicTable.Rows.Add(theRow); ?????????????? } ?????????? } ?????????? return theDynamicTable; ?????? } ?? } } ~~~ 所有要提供給客戶端得實體的打包,以及服務端得實體緩存之類的都可以封裝到這一層。業務邏輯層另外的最主要的功能就是業務邏輯的處理了,簡單的新增,修改,刪除和查詢都可在這里封裝,有的雖然只是簡單的調用數據訪問層,但也不要讓服務層直接調用。因為在這一層可以增加很多功能,比如沖突檢測,邏輯檢查等。 2)RIA 服務層:DynamicDataService ~~~ namespace RIAServices.Web { ?? using System; ?? using System.Collections.Generic; ?? using System.ComponentModel; ?? using System.ComponentModel.DataAnnotations; ?? using System.Linq; ?? using System.ServiceModel.DomainServices.Hosting; ?? using System.ServiceModel.DomainServices.Server; ?? using MEntities; ?? using BBusiness; ?? // TODO: 創建包含應用程序邏輯的方法。 ?? [EnableClientAccess()] ?? public class DynamicDataService : DomainService ?? { ?????? static string conn = "Data Source=127.0.0.1;Initial Catalog=DEVTEST;Persist Security Info=True;User ID=sa;Password=tian777888"; ?????? ???????[Invoke] ?????? public DynamicDataTable GetDynamicTable(string strSQL) ?????? { ?????????? //在這里檢查調用是否合法 ?????????? return new DynamicDataBusi().GetDynamicDataTable(strSQL, conn); ?????? } ?? } } ~~~ 大家要注意,我的數據庫連接出現在這一層,純粹是巧合,數據庫連接應該放到數據訪問層或者配置文件里,如果是比較復雜的應用,比如SaaS,還并需用單獨的類進行管理。 另外注意,這里我沒有直接將服務層放在承載silverlight客戶端得webapp上,而是建立的RIA服務類庫。 到這里,服務端的實現就完成了,編譯后,客戶端就可以看到我們的實體,并可調用服務方法。 后面,我們繼續建立客戶端的應用。 友情提示:以上代碼經過實測,絕對可以OK的。另外注意你們的WCF RIA Services 至少要到SP1,否則會有編譯錯誤.
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                              哎呀哎呀视频在线观看