IObjectSpace.IsNewObject(Object) Method

Indicates whether a specified object has been created but has not been saved to the database.

Namespace: DevExpress.ExpressApp

Assembly: DevExpress.ExpressApp.v24.1.dll

NuGet Package: DevExpress.ExpressApp

Declaration

C#

bool IsNewObject(
    object obj
)

VB.NET

Function IsNewObject(
    obj As Object
) As Boolean

Parameters

Name	Type	Description
obj	Object	A object to be tested.

Returns

Type	Description
Boolean	true if the specified object has not yet been saved to the database; otherwise, false.

Remarks

The objects that are created both directly via the IObjectSpace.CreateObject method and by means of built-in Actions (for example, the New Action) are not saved to the database immediately. They are saved only when the IObjectSpace.CommitChanges method is called, directly or by means of built-in Actions (for example, the Save Action).

Until an object created within the current Object Space is not saved to the database, the IsNewObject method returns true. After saving, the IsNewObject method returns false. It is presumed that this property must return false if the object passed as the parameter is not persistent, or if it does not belong to the current Object Space.

Related GitHub Examples

The following code snippets (auto-collected from DevExpress Examples) contain references to the IsNewObject(Object) method.

Note

The algorithm used to collect these code examples remains a work in progress. Accordingly, the links and snippets below may produce inaccurate results. If you encounter an issue with code examples below, please use the feedback form on this page to report the issue.

C#

XAF_Non-Persistent-Objects-Reloading-Demo/CS/NonPersistentObjectsDemo.Module/BusinessObjects/LiveSummary.cs#L124

var link = obj as IObjectSpaceLink;
if(link == null || link.ObjectSpace == null || link.ObjectSpace.IsNewObject(obj)) {
    return null;

XAF-How-to-Implement-CRUD-Operations-for-Non-Persistent-Objects-Stored-Remotely/CS/NonPersistentObjectsDemo.Module/TransientNonPersistentObjectAdapter.cs#L95

    var sourceObjectSpace = BaseObjectSpace.FindObjectSpaceByObject(obj);
    return sourceObjectSpace == null ? false : sourceObjectSpace.IsNewObject(obj);
}

XAF_Non-Persistent-Objects-Nested-In-Persistent-Objects-Demo/CS/NonPersistentObjectsDemo.Module/BusinessObjects/NonPersistentObjectAdapter.cs#L94

else {
    if(link.ObjectSpace.IsNewObject(obj)) {
        if(link.ObjectSpace.Equals(_objectSpace)) {

VB.NET

XAF_Non-Persistent-Objects-Reloading-Demo/VB/NonPersistentObjectsDemo.Module/BusinessObjects/LiveSummary.vb#L153

Dim link = TryCast(obj, IObjectSpaceLink)
If link Is Nothing OrElse link.ObjectSpace Is Nothing OrElse link.ObjectSpace.IsNewObject(obj) Then
    Return Nothing

XAF-How-to-Implement-CRUD-Operations-for-Non-Persistent-Objects-Stored-Remotely/VB/NonPersistentObjectsDemo.Module/TransientNonPersistentObjectAdapter.vb#L92

    Dim sourceObjectSpace = BaseObjectSpace.FindObjectSpaceByObject(obj)
    Return If(sourceObjectSpace Is Nothing, False, sourceObjectSpace.IsNewObject(obj))
End Function

XAF_Non-Persistent-Objects-Nested-In-Persistent-Objects-Demo/VB/NonPersistentObjectsDemo.Module/BusinessObjects/NonPersistentObjectAdapter.vb#L97

Else
    If link.ObjectSpace.IsNewObject(obj) Then
        If link.ObjectSpace.Equals(_objectSpace) Then