通過WCF數據服務暴露Azure表存儲缺少OData函數

我有一個暴露Azure表的WCF數據服務。此工作適用於CRUD操作和過濾，但我無法使用OData功能，如$top=1。通過WCF數據服務暴露Azure表存儲缺少OData函數

我試圖在DataServiceQuery

的WcfDataService1.svc.cs使用IncludeTotalCount()時也出現錯誤：

[System.ServiceModel.ServiceBehavior(IncludeExceptionDetailInFaults = true)] 
public class WcfDataService1 : DataService<MenuDataServiceContext> 
{ 
    // This method is called only once to initialize service-wide policies. 
    public static void InitializeService(DataServiceConfiguration config) 
    { 
     // TODO: set rules to indicate which entity sets and service operations are visible, updatable, etc. 
     config.SetEntitySetAccessRule("*", EntitySetRights.All); 
     config.SetServiceOperationAccessRule("*", ServiceOperationRights.All); 
     config.DataServiceBehavior.MaxProtocolVersion = DataServiceProtocolVersion.V2; 
     config.UseVerboseErrors = true; 
    } 
}

的MenuDataServiceContext：

public class MenuDataServiceContext : IUpdatable 
{ 
    private readonly AzureTableContext tableContext = new AzureTableContext(); 

    public IQueryable<MenuItemRow> Menu 
    { 
     get 
     { 
      var retval = this.tableContext.CreateQuery<MenuItemRow>("Menu").AsTableServiceQuery(); 
      return retval; 
     } 
    } 

    public void AddReferenceToCollection(object targetResource, string propertyName, object resourceToBeAdded) 
    { 

     throw new NotImplementedException(); 
    } 

    public void ClearChanges() 
    { 
     return; 
    } 

    public object CreateResource(string containerName, string fullTypeName) 
    { 
     var entity = new MenuItemRow(); 
     // Add the entity to table context. 
     this.tableContext.AddObject(containerName, entity); 
     return entity; 
    } 

    public void DeleteResource(object targetResource) 
    { 
     var person = targetResource as MenuItemRow; 
     if (person == null) 
     { 
      throw new DataServiceException(400, "Invalid object. Object must be a Person"); 
     } 
     this.tableContext.DeleteObject(person); 
     this.tableContext.SaveChanges(); 
    } 

    public object GetResource(IQueryable query, string fullTypeName) 
    { 
     var tableQuery = query as IQueryable<MenuItemRow>; 
     if (tableQuery == null) 
     { 
      throw new DataServiceException(400, "Invalid query."); 
     } 
     return tableQuery.First(); 
    } 

    public object GetValue(object targetResource, string propertyName) 
    { 
     var person = (MenuItemRow)targetResource; 
     return typeof(MenuItemRow).GetProperty(propertyName).GetValue(person); 
    } 

    public void RemoveReferenceFromCollection(object targetResource, string propertyName, object resourceToBeRemoved) 
    { 
     throw new NotImplementedException(); 
    } 

    public object ResetResource(object resource) 
    { 
     throw new NotImplementedException(); 
    } 

    public object ResolveResource(object resource) 
    { 
     return resource; 
    } 

    public void SaveChanges() 
    { 
     this.tableContext.SaveChanges(); 
    } 

    public void SetReference(object targetResource, string propertyName, object propertyValue) 
    { 
     throw new NotImplementedException(); 
    } 

    public void SetValue(object targetResource, string propertyName, object propertyValue) 
    { 
     // The Partition/RowKey should not be modified. 
     if (propertyValue != null && propertyName != "PartitionKey" && propertyName != "RowKey") 
     { 
      var person = (MenuItemRow)targetResource; 
      typeof(MenuItemRow).GetProperty(propertyName).SetValue(person, propertyValue, null); 
      this.tableContext.UpdateObject(person); 
     } 
    } 
}

我覺得像MenuDataServiceContext應該實現其他的東西比IUpdatable獲得額外的功能。

在調試時沒有任何例外情況引發服務，但在瀏覽器中使用$top=1命令時，會出現NotImplemented例外。

來源

2013-06-28 Tim Blackwell

使用wireshark後，我發現呼叫表存儲服務是$orberby=partitionkey,rowkey&$top=1。

由於天藍色表存儲不支持排序，我得到NotImplemented異常。

現在的問題是爲什麼WCF數據服務在進行拍攝時將orderby置於開啓狀態。

來源

2013-07-05 15:43:30

通過WCF數據服務暴露Azure表存儲缺少OData函數

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