Fills an ObjectSet with all the objects of the given type.

Syntax

Visual Basic (Declaration)
Overloads Public Overridable Function GetObjectSet(Of T)( _ ByVal typeSelector As PersistentTypeSelector _ ) As ObjectSet(Of T)

Visual Basic (Usage)	Copy Code
`Dim instance As ObjectContext Dim typeSelector As PersistentTypeSelector Dim value As ObjectSet(Of T) value = instance.GetObjectSet(Of T)(typeSelector)`

C#
public virtual ObjectSet<T> GetObjectSet<T>( PersistentTypeSelector typeSelector )

Managed Extensions for C++
public: virtual ObjectSet<T>* GetObjectSet<T>( PersistentTypeSelector* typeSelector )

C++/CLI
public: virtual ObjectSet<T>^ GetObjectSetgeneric<typename T> ( PersistentTypeSelector^ typeSelector )

Parameters

typeSelector: Delegate invoked before each creating of a persistent object. This allows to dynamically change the type of the created persistent object or ignore some objects.

Type Parameters

T

Return Value

An instance of an ObjectSet filled with the objects from the storage.

Example

The following example introduces to the use of the GetObjectSet routine.

C# Copy Code

C#	Copy Code
// Creates a new ObjectContext that uses an MsSql Server as storage. ObjectContext context = new ObjectContext(new MsSqlStorage("sa", "", "localhost", "application")); // ... Other code. // Get the ObjectSet with user matching the name and sorting them by name. ObjectSet<User> objectSet = context.GetObjectSet<User>( new PersistentTypeSelector(MySelection)); // Loop through all items and do something. foreach(User user in objectSet) { // Do something. } // ... private void MySelection(object sender, FetchingStorageRecordEventArgs e) { if (e.DataRecord["Type"] == "1") { // Switch the type of the persistent that is created to User1. e.Type = typeof(User1); } // Have a persistent of type User created. e.Type = typeof(User); }

// Creates a new ObjectContext that uses an MsSql Server as storage. 
ObjectContext context = new ObjectContext(new MsSqlStorage("sa", "",  
    "localhost", "application")); 
  
// ... Other code. 
  
// Get the ObjectSet with user matching the name and sorting them by name. 
ObjectSet<User> objectSet = context.GetObjectSet<User>( 
    new PersistentTypeSelector(MySelection)); 
  
// Loop through all items and do something. 
foreach(User user in objectSet) 
{ 
    // Do something. 
} 
 
// ... 
 
private void MySelection(object sender, FetchingStorageRecordEventArgs e) 
{ 
    if (e.DataRecord["Type"] == "1") 
    { 
        // Switch the type of the persistent that is created to User1. 
        e.Type = typeof(User1); 
    } 
    // Have a persistent of type User created. 
    e.Type = typeof(User); 
}

Remarks

Returns a filled ObjectSet. An ObjectSet is as a in memory cache for objects. Use the conditions to restrict the result of the routine.

Requirements

Platforms: Windows 2000, Windows XP family, Windows Server 2003 family, Windows Vista family

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Generic GetObjectSet(PersistentTypeSelector) Method
See Also Example