'宣言 Protected Overridable Sub OnBeforeActivate( _ ByVal e As CancelableNodeEventArgs _ )
protected virtual void OnBeforeActivate( CancelableNodeEventArgs e )
Imports Infragistics.Win.UltraWinTree Private Sub ultraTree1_BeforeActivate(ByVal sender As Object, ByVal e As Infragistics.Win.UltraWinTree.CancelableNodeEventArgs) Handles ultraTree1.BeforeActivate Dim sb As New System.Text.StringBuilder() If e.TreeNode Is Nothing Then sb.Append("No node is being activated.") Else sb.Append("Node: ") sb.Append(e.TreeNode.Key) sb.Append(" is being activated.") End If Debug.WriteLine(sb.ToString()) ' 注: この操作が以下のコード行によってキャンセルできます 'e.Cancel = True End Sub
using System.Diagnostics; using Infragistics.Win.UltraWinTree; private void ultraTree1_BeforeActivate(object sender, Infragistics.Win.UltraWinTree.CancelableNodeEventArgs e) { System.Text.StringBuilder sb = new System.Text.StringBuilder(); if ( e.TreeNode == null ) { sb.Append("No node is being activated."); } else { sb.Append("Node: "); sb.Append(e.TreeNode.Key); sb.Append(" is being activated."); } Debug.WriteLine( sb.ToString() ); // 注: この操作が以下のコード行によってキャンセルできます //e.Cancel = true; }