ListView - How to edit multiple objects simultaneously (batch edit) via a property grid or a separate DetailView

Hello,

In the latest XAF versions, I recommend that you use NonPersistentObjectSpace and design non-persistent classes as described at eXpressApp Framework > Concepts > Business Model Design > Non-Persistent Objects. To manage persistent data (for lookups) in non-persistent objects, use the How to: Show Persistent Objects in a Non-Persistent Object's View  approach. To show a View, use the Ways to Show a View  approach (PopupWindowShowAction).

You can find a ready example code below (add this code into the MainDemo.Module project):

C#
using DevExpress.ExpressApp;  
using DevExpress.ExpressApp.Actions;  
using DevExpress.ExpressApp.DC;  
using DevExpress.ExpressApp.Editors;  
using MainDemo.Module.BusinessObjects;  

namespace MainDemo.Module.Controllers {  
    public class BatchEditInPopupListViewController : ObjectViewController<ListView, Contact> {  
        public PopupWindowShowAction BatchEditInPopup { get; private set; }  
        public BatchEditInPopupListViewController() {  
            TargetViewNesting = Nesting.Root;  
            BatchEditInPopup = new PopupWindowShowAction(this, "BatchEditInPopup", DevExpress.Persistent.Base.PredefinedCategory.Edit);  
            BatchEditInPopup.CustomizePopupWindowParams += BatchEditInPopup_CustomizePopupWindowParams;  
            BatchEditInPopup.Execute += BatchEditInPopup_Execute;  
        }  
        private void BatchEditInPopup_CustomizePopupWindowParams(object sender, CustomizePopupWindowParamsEventArgs e) {  
            IObjectSpace persistentObjectSpace = Application.CreateObjectSpace(typeof(Contact));  
            NonPersistentObjectSpace nonPersistentObjectSpace = (NonPersistentObjectSpace)e.Application.CreateObjectSpace(typeof(ContactBatchEditParameter));  
            nonPersistentObjectSpace.AdditionalObjectSpaces.Add(persistentObjectSpace);  
            ContactBatchEditParameter parameter = nonPersistentObjectSpace.CreateObject<ContactBatchEditParameter>();  
            DetailView dv = Application.CreateDetailView(nonPersistentObjectSpace, parameter, false);  
            dv.ViewEditMode = ViewEditMode.Edit;  
            e.View = dv;  
            e.View.Disposing += (s, args) => {  
                if(persistentObjectSpace != null) {  
                    persistentObjectSpace.Dispose();  
                    persistentObjectSpace = null;  
                }  
            };  
        }  
        private void BatchEditInPopup_Execute(object sender, PopupWindowShowActionExecuteEventArgs e) {  
            ContactBatchEditParameter parameter = (ContactBatchEditParameter)e.PopupWindowViewCurrentObject;  
            //Dennis: Iterating through the objects selected in the ListView.  
            foreach(Contact obj in e.SelectedObjects) {  
                obj.FirstName = parameter.FirstName;  
                obj.LastName = parameter.LastName;  
                obj.Manager = View.ObjectSpace.GetObject<Contact>(parameter.Manager);  
            }  
            //Dennis: Commit the changes made to the ListView ObjectSpace if this ListView is editable.  
            if(!View.AllowEdit.ResultValue) {  
                View.ObjectSpace.CommitChanges();  
            }  
        }  
    }  
    [DomainComponent]  
    public class ContactBatchEditParameter {  
        public string FirstName { get; set; }  
        public string LastName { get; set; }  
        public Contact Manager { get; set; }  
    }  
}  

Visual Basic
Imports DevExpress.ExpressApp  
Imports DevExpress.ExpressApp.Actions  
Imports DevExpress.ExpressApp.DC  
Imports DevExpress.ExpressApp.Editors  
Imports MainDemo.Module.BusinessObjects  

Namespace MainDemo.Module.Controllers  
    Public Class BatchEditInPopupListViewController  
        Inherits ObjectViewController(Of ListView, Contact)  

        Private privateBatchEditInPopup As PopupWindowShowAction  
        Public Property BatchEditInPopup() As PopupWindowShowAction  
            Get  
                Return privateBatchEditInPopup  
            End Get  
            Private Set(ByVal value As PopupWindowShowAction)  
                privateBatchEditInPopup = value  
            End Set  
        End Property  
        Public Sub New()  
            TargetViewNesting = Nesting.Root  
            BatchEditInPopup = New PopupWindowShowAction(Me, "BatchEditInPopup", DevExpress.Persistent.Base.PredefinedCategory.Edit)  
            AddHandler BatchEditInPopup.CustomizePopupWindowParams, AddressOf BatchEditInPopup_CustomizePopupWindowParams  
            AddHandler BatchEditInPopup.Execute, AddressOf BatchEditInPopup_Execute  
        End Sub  
        Private Sub BatchEditInPopup_CustomizePopupWindowParams(ByVal sender As Object, ByVal e As CustomizePopupWindowParamsEventArgs)  
            Dim persistentObjectSpace As IObjectSpace = Application.CreateObjectSpace(GetType(Contact))  
            Dim nonPersistentObjectSpace As NonPersistentObjectSpace = CType(e.Application.CreateObjectSpace(GetType(ContactBatchEditParameter)), NonPersistentObjectSpace)  
            nonPersistentObjectSpace.AdditionalObjectSpaces.Add(persistentObjectSpace)  
            Dim parameter As ContactBatchEditParameter = nonPersistentObjectSpace.CreateObject(Of ContactBatchEditParameter)()  
            Dim dv As DetailView = Application.CreateDetailView(nonPersistentObjectSpace, parameter, False)  
            dv.ViewEditMode = ViewEditMode.Edit  
            e.View = dv  
            AddHandler e.View.Disposing, Sub(s, args)  
                If persistentObjectSpace IsNot Nothing Then  
                    persistentObjectSpace.Dispose()  
                    persistentObjectSpace = Nothing  
                End If  
            End Sub  
        End Sub  
        Private Sub BatchEditInPopup_Execute(ByVal sender As Object, ByVal e As PopupWindowShowActionExecuteEventArgs)  
            Dim parameter As ContactBatchEditParameter = CType(e.PopupWindowViewCurrentObject, ContactBatchEditParameter)  
            'Dennis: Iterating through the objects selected in the ListView.  
            For Each obj As Contact In e.SelectedObjects  
                obj.FirstName = parameter.FirstName  
                obj.LastName = parameter.LastName  
                obj.Manager = View.ObjectSpace.GetObject(Of Contact)(parameter.Manager)  
            Next obj  
            'Dennis: Commit the changes made to the ListView ObjectSpace if this ListView is editable.  
            If Not View.AllowEdit.ResultValue Then  
                View.ObjectSpace.CommitChanges()  
            End If  
        End Sub  
    End Class  
    <DomainComponent>  
    Public Class ContactBatchEditParameter  
        Public Property FirstName() As String  
        Public Property LastName() As String  
        Public Property Manager() As Contact  
    End Class  
End Namespace  

See Also:
Xafari FrameworkGroup (Bulk) Edit
Concepts > UI Construction > Views > List View Edit Modes  (InlineEditMode = Batch)
Search keywords
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