IObjectSpace.RemoveFromModifiedObjects(Object) Method
Removes the specified object from the list of objects to be committed.
Namespace: DevExpress.ExpressApp
Assembly: DevExpress.ExpressApp.v24.2.dll
NuGet Package: DevExpress.ExpressApp
Declaration
Parameters
| Name | Type | Description |
|---|---|---|
| obj | Object | An object to be removed from the list of modified objects. |
Remarks
The following code shows how to manually save child collection changes made in the parent Detail View:
using DevExpress.ExpressApp;
using System;
using System.Collections.Generic;
using System.ComponentModel;
using YourSolutionName.Module.BusinessObjects;
namespace YourSolutionName.Module.Controllers {
public class MyViewController : ObjectViewController<DetailView, Parent> {
List<Child> detailObjectsCache = new List<Child>();
protected override void OnActivated() {
base.OnActivated();
ObjectSpace.CustomCommitChanges += ObjectSpace_CustomCommitChanges;
ObjectSpace.Committing += ObjectSpace_Committing;
ObjectSpace.Committed += ObjectSpace_Committed;
ObjectSpace.Reloaded += ObjectSpace_Reloaded;
}
protected override void OnDeactivated() {
ObjectSpace.CustomCommitChanges -= ObjectSpace_CustomCommitChanges;
ObjectSpace.Committing -= ObjectSpace_Committing;
ObjectSpace.Committed -= ObjectSpace_Committed;
ObjectSpace.Reloaded -= ObjectSpace_Reloaded;
base.OnDeactivated();
}
void ObjectSpace_Reloaded(object sender, EventArgs e) {
detailObjectsCache.Clear();
}
void ObjectSpace_Committed(object sender, EventArgs e) {
detailObjectsCache.Clear();
}
void ObjectSpace_Committing(object sender, CancelEventArgs e) {
IObjectSpace os = (IObjectSpace)sender;
for (int i = os.ModifiedObjects.Count - 1; i >= 0; i--) {
object item = os.ModifiedObjects[i];
if (typeof(Child).IsAssignableFrom(item.GetType())) {
detailObjectsCache.Add(item as Child);
os.RemoveFromModifiedObjects(item);
}
}
}
void ObjectSpace_CustomCommitChanges(object sender, HandledEventArgs e) {
// Implement custom logic to save Detail objects here.
foreach (Child detailObject in detailObjectsCache) {
//...
}
}
}
}
Related GitHub Examples
The following code snippet (auto-collected from DevExpress Examples) contains a reference to the RemoveFromModifiedObjects(Object) method.
Note
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