'宣言 Public Interface ISelectionStrategyFilter
public interface ISelectionStrategyFilter
Imports Infragistics.Win Imports Infragistics.Win.UltraWinGrid ' Implement the ISelectionStrategyFilter interface on a class ' (in this case the form) Public Class Form1 Inherits System.Windows.Forms.Form Implements Infragistics.Win.ISelectionStrategyFilter Private cellSelectionStrategy As MyCustomSelectionStrategy Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load ' Create the custom selection strategy Me.cellSelectionStrategy = New MyCustomSelectionStrategy(Me.UltraGrid1) ' Set the grid’s SelectionStrategyFilter property to the object that ' implements the ISelectionStrategyFilter interface. Me.UltraGrid1.SelectionStrategyFilter = Me End Sub Public Function GetSelectionStrategy(ByVal item As Infragistics.Shared.ISelectableItem) As Infragistics.Win.ISelectionStrategy Implements Infragistics.Win.ISelectionStrategyFilter.GetSelectionStrategy ' If the item is a cell return the custom strategy If TypeOf (item) Is UltraGridCell Then Return Me.cellSelectionStrategy End If ' Return null to have the grid provide an appropriate strategy Return Nothing End Function End Class ' derive a class from one of the selection ' strategies defines in the PLF Friend Class MyCustomSelectionStrategy Inherits Infragistics.Win.SelectionStrategyExtended Public Sub New(ByVal manager As ISelectionManager) MyBase.New(manager) End Sub Public Overloads Overrides Function OnMouseDown(ByVal item As Infragistics.Shared.ISelectableItem, ByRef msginfo As Infragistics.Win.MouseMessageInfo) As Boolean ' Do some custom mouse down processing ' ... Return MyBase.OnMouseDown(item, msginfo) End Function End Class
using System.Diagnostics; using Infragistics.Win; using Infragistics.Win.UltraWinGrid; // Implement the ISelectionStrategyFilter interface on a class // (in this case the form) public class Form1 : System.Windows.Forms.Form, Infragistics.Win.ISelectionStrategyFilter { private ISelectionStrategy cellSelectionStrategy; private void Form1_Load(object sender, System.EventArgs e) { // Set the grid’s SelectionStrategyFilter property to the object that // implements the ISelectionStrategyFilter interface. this.ultraGrid1.SelectionStrategyFilter = this; // Create the custom selection strategy this.cellSelectionStrategy = new MyCustomSelectionStrategy( this.ultraGrid1 ); } public Infragistics.Win.ISelectionStrategy GetSelectionStrategy(Infragistics.Shared.ISelectableItem item) { // If the item is a cell return the custom strategy if ( item is UltraGridCell ) return this.cellSelectionStrategy; return null; } // derive a class from one of the selection // strategies defines in the PLF internal class MyCustomSelectionStrategy : SelectionStrategyExtended { internal MyCustomSelectionStrategy( ISelectionManager manager ) : base( manager ) { } public override bool OnMouseDown(Infragistics.Shared.ISelectableItem item, ref Infragistics.Win.MouseMessageInfo msginfo) { // Do some custom mouse down processing // ... return base.OnMouseDown( item, ref msginfo ); } } }