ObjectIDGenerator.HasId(Object, Boolean) Method
Definition
Important
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Determines whether an object has already been assigned an ID.
public:
virtual long HasId(System::Object ^ obj, [Runtime::InteropServices::Out] bool % firstTime);public virtual long HasId (object obj, out bool firstTime);abstract member HasId : obj * bool -> int64
override this.HasId : obj * bool -> int64Public Overridable Function HasId (obj As Object, ByRef firstTime As Boolean) As LongParameters
- obj
- Object
The object you are asking for.
- firstTime
- Boolean
true if obj was not previously known to the ObjectIDGenerator; otherwise, false.
Returns
The object ID of obj if previously known to the ObjectIDGenerator; otherwise, zero.
Exceptions
The obj parameter is null.
Remarks
If the object has already been assigned an ID, the ID is returned and firstTime is set to false; otherwise, zero is returned and firstTime is set to true. HasId differs from GetId in that it never creates an ID for an object that has not already been seen by the ObjectIDGenerator.
