'宣言 Protected Overridable Sub OnBeforeSelect( _ ByVal e As BeforeSelectEventArgs _ )
protected virtual void OnBeforeSelect( BeforeSelectEventArgs e )
Imports Infragistics.Win.UltraWinTree Private Sub ultraTree1_BeforeSelect(ByVal sender As Object, ByVal e As Infragistics.Win.UltraWinTree.BeforeSelectEventArgs) Handles ultraTree1.BeforeSelect Dim sb As New System.Text.StringBuilder() sb.Append("The SelectedNodes collection is about to change to the nodes ") Dim node As UltraTreeNode ' 新しい SelectedNodes コレクションでノードをループします ' 注: イベント引数によって公開される Nodes コレクション ' は読み取り専用です For Each node In e.NewSelections sb.Append(node.Key) sb.Append(", ") Next sb.Append(" Press ''OK'' or ''Cancel''.") Dim dr As DialogResult dr = MessageBox.Show(Me, _ sb.ToString(), _ "Selected nodes changing", _ MessageBoxButtons.OKCancel) If dr = DialogResult.Cancel Then e.Cancel = True End Sub
using System.Diagnostics; using Infragistics.Win.UltraWinTree; private void ultraTree1_BeforeSelect(object sender, Infragistics.Win.UltraWinTree.BeforeSelectEventArgs e) { System.Text.StringBuilder sb = new System.Text.StringBuilder(); sb.Append("The SelectedNodes collection is about to change to the nodes "); // 新しい SelectedNodes コレクションでノードをループします // 注: イベント引数によって公開される Nodes コレクション // は読み取り専用です foreach ( UltraTreeNode node in e.NewSelections ) { sb.Append( node.Key ); sb.Append( ", " ); } sb.Append(" Press ''OK'' or ''Cancel''."); DialogResult dr = MessageBox.Show( this, sb.ToString(), "Selected nodes changing", MessageBoxButtons.OKCancel ); if ( dr == DialogResult.Cancel ) e.Cancel = true; }