比較，添加和更新實體中的日期字段

Question

試圖比較實體與當前日期的現有日期。如果實體（testentity）日期的實體字段（testfield）在當前日期之後等於OR，則將字段中的日期添加1年。

問題 - 出於某種原因，它讀取所有日期並進行比較，但在現場不進行更新。我已經在實體上使用了後操作步驟。

更新：我添加ServiceContext.UpdateObject（實體）和ServiceContext.SaveChanges（）;代碼，但現在它給我「上下文不是正在跟蹤...」的錯誤。

任何幫助將深表謝意。謝謝！

請看下面的代碼。

public class PostUpdate: Plugin 
{ 

    public PostUpdate() 
     : base(typeof(PostUpdate)) 
    { 
     base.RegisteredEvents.Add(new Tuple<int, string, string, Action<LocalPluginContext>>(40, "Update", "new_testentity", new Action<LocalPluginContext>(ExecutePostUpdate))); 

     protected void ExecutePostupdate(LocalPluginContext localContext) 
    { 
     // get the plugin context 
     IPluginExecutionContext context = localContext.PluginExecutionContext; 

     //Get the IOrganizationService 
     IOrganizationService service = localContext.OrganizationService; 

     //create the service context 
     var ServiceContext = new OrganizationServiceContext(service); 
     ITracingService tracingService = localContext.TracingService; 

     // The InputParameters collection contains all the data passed in the message request. 
     if (context.InputParameters.Contains("Target") && 
     context.InputParameters["Target"] is Entity) 
     { 
      // Obtain the target entity from the input parmameters. 
      Entity entity = (Entity)context.InputParameters["Target"]; 


      // Verify that the target entity represents an account. 
      // If not, this plug-in was not registered correctly. 
      if (entity.LogicalName != "new_testentity") 
       return; 

        try 
        { 
         var k = entity["new_testfield"]; 
         DateTime m = Convert.ToDateTime(k); 

         DateTime d = DateTime.Now; 

         int result = DateTime.Compare(m, d); 

         // compare the dates 
         if (result <= 0) 
         { 
          try 
          { 


           entity["new_testfield"] = DateTime.Now.AddYears(1); 
           ServiceContext.UpdateObject(entity); 
          } 
         ServiceContext.SaveChanges(); 
        //Adding this is giving me "The context is not currently tracking     the 'new_testentity' entity." 

          } 
          catch (FaultException<OrganizationServiceFault> ex) 
          { 
          } 
         } 
        } 

        //<snippetFollowupPlugin3> 
        catch (FaultException<OrganizationServiceFault> ex) 
        { 
         throw new InvalidPluginExecutionException("An error occurred in the FollupupPlugin plug-in.", ex); 
        } 
        //</snippetFollowupPlugin3> 

        catch (Exception ex) 
        { 
         tracingService.Trace("FollowupPlugin: {0}", ex.ToString()); 
         throw; 
        } 
      } 
     } 

Answer 1

試試你的實體連接到serviceContext。

http://msdn.microsoft.com/en-us/library/microsoft.xrm.sdk.client.organizationservicecontext.attach.aspx

Answer 2

你應該註冊您在操作前步驟插件，然後簡單地添加/更改InputParameter PropertyBag中適當的值。這樣，您的更改與交易內聯，並且您不需要單獨的更新呼叫。