LookupGrid: Filter datasource in popup according to selected values

Controls.LookupGrid/LookupControl3.vb

@@ -8,6 +8,8 @@ Imports DevExpress.XtraEditors.ViewInfo
 Imports DevExpress.XtraEditors.Drawing
 Imports DevExpress.Accessibility
 Imports DevExpress.XtraEditors.Controls
+Imports DevExpress.XtraGrid.Views.Base
+Imports DevExpress.XtraGrid.Columns
 
 <ToolboxItem(True)>
 Public Class LookupControl3
@@ -50,11 +52,12 @@ Public Class RepositoryItemLookupControl3
     Private Const TAG_DROPDOWN = "openDropdown"
     Private Const TAG_BUTTON_LOOKUP_FORM = "openLookupForm"
 
+    Public Const CustomEditName As String = "LookupControl3"
+
     Private _R As Resources.ResourceManager = My.Resources.Strings.ResourceManager
     Private _SelectedValues As New List(Of String)
     Private _MultiSelect As Boolean = False
     Private _ReadOnly As Boolean = False
-    Public Const CustomEditName As String = "LookupControl3"
 
     Public Property AllowAddNewValues As Boolean
     Public Property PreventDuplicates As Boolean
@@ -227,6 +230,22 @@ Public Class RepositoryItemLookupControl3
         End Try
     End Sub
 
+    Private Shadows Sub Popup(sender As LookupControl3, e As EventArgs) Handles Me.BeforePopup
+        Dim oView As ColumnView = sender.Properties.View
+
+        If DataSource IsNot Nothing AndAlso DataSource.Columns.Count > 0 Then
+            Dim oFirstColumn As String = DataSource.Columns.Item(0).ColumnName
+
+            Dim oWrapped = SelectedValues.Select(Function(v As String)
+                                                     Return $"'{v}'"
+                                                 End Function).ToArray()
+            Dim oValueString As String = String.Join(",", oWrapped)
+            Dim oCriterium As String = $"[{oFirstColumn}] IN ({oValueString})"
+            View.ActiveFilterCriteria = DevExpress.Data.Filtering.CriteriaOperator.Parse(oCriterium)
+            View.OptionsView.ShowFilterPanelMode = ShowFilterPanelMode.Never
+        End If
+    End Sub
+
     Public Sub HandleQueryPopup(sender As Object, e As CancelEventArgs) Handles Me.QueryPopUp
         If MultiSelect = False Then
             e.Cancel = True

GUIs.Test.TestGUI/frmLookup.vb

@@ -21,6 +21,8 @@ Public Class frmLookup
         LookupControl31.Properties.DataSource = oTable
 
         LookupControl32.Properties.MultiSelect = True
+        LookupControl32.Properties.DisplayMember = "Col1"
+        LookupControl32.Properties.ValueMember = "Col1"
         LookupControl32.Properties.DataSource = oTable
     End Sub