IObjectSpace.IsModified Property

Specifies whether objects belonging to the current Object Space are modified.

Namespace: DevExpress.ExpressApp

Assembly: DevExpress.ExpressApp.v18.2.dll

Declaration

C#

bool IsModified { get; }

VB.NET

ReadOnly Property IsModified As Boolean

Property Value

Type	Description
Boolean	true if at least one persistent object is modified; otherwise, false.

Remarks

An Object Space manages the state of the persistent objects which it created or retrieved. You can learn about this state via the IsModified property.

If you implement the IObjectSpace interface in the BaseObjectSpace class’ descendant, you don’t have to implement the IsModified property. It’s implemented in the BaseObjectSpace class. The property’s value is changed using the protected BaseObjectSpace.SetIsModified method. This method raises the IObjectSpace.ModifiedChanged event if the IsModified property has been changed. The property returns false if none of the objects have been modified since they were retrieved or committed (see IObjectSpace.CommitChanges). After an object has been created, modified or deleted, the IsModified property returns true.

When implementing the BaseObjectSpace class descendant, call the BaseObjectSpace.SetIsModified method to change the IsModified state where it is required.

To get the list of modified objects, use the IObjectSpace.ModifiedObjects property.

Related GitHub Examples

The following code snippets (auto-collected from DevExpress Examples) contain references to the IsModified property.

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_how-to-apply-another-appearance-to-reviewed-objects-e1386/CS/DXExample.Module/MarkAsReadViewController.cs#L20

base.OnActivated();
AddObjectToUserBOs(!ObjectSpace.IsModified);
View.CurrentObjectChanged += new EventHandler(View_CurrentObjectChanged);

XAF_how-to-show-an-asterisk-in-the-window-title-when-an-object-in-a-view-is-modified-e1703/CS/WinSolution.Module/DirtyTitleWindowController.cs#L30

private void ObjectSpace_ModifiedChanged(object sender, EventArgs e) {
    if(((IObjectSpace)sender).IsModified) {
        UpdateCaption();

VB.NET

XAF_how-to-apply-another-appearance-to-reviewed-objects-e1386/VB/DXExample.Module/MarkAsReadViewController.vb#L22

MyBase.OnActivated()
AddObjectToUserBOs((Not ObjectSpace.IsModified))
AddHandler View.CurrentObjectChanged, AddressOf View_CurrentObjectChanged

XAF_how-to-show-an-asterisk-in-the-window-title-when-an-object-in-a-view-is-modified-e1703/VB/WinSolution.Module/DirtyTitleWindowController.vb#L32

Private Sub ObjectSpace_ModifiedChanged(ByVal sender As Object, ByVal e As EventArgs)
    If (CType(sender, IObjectSpace)).IsModified Then
        UpdateCaption()