'Declaration Public Delegate Sub BeforeCopyEventHandler( _ ByVal sender As Object, _ ByVal e As BeforeCopyEventArgs _ )
public delegate void BeforeCopyEventHandler( object sender, BeforeCopyEventArgs e )
Imports Infragistics.Win Imports Infragistics.Win.UltraWinTree Private Sub ultraTree1_BeforeCopy(ByVal sender As Object, ByVal e As Infragistics.Win.UltraWinTree.BeforeCopyEventArgs) Handles ultraTree1.BeforeCopy Dim sb As New System.Text.StringBuilder() Dim node As UltraTreeNode Dim dr As DialogResult ' Setting the Tag of the Nodes collection passed into the BeforeCut ' and BeforeCopy events to some serializable value can be used to ' identify the tree that copied the nodes to the clipboard. This Tag ' value will be de-serialized and set on the Nodes collection that is ' passed into the BeforePaste event. This can be used for preventing ' paste operations between trees. ' Set the Tag property on the Nodes collection to the tree's hash code. ' Note: don't set the tag to the tree itself since that isn't serializable e.Nodes.Tag = Me.ultraTree1.GetHashCode() sb.Append("The following nodes are about to be copied to the clipboard: ") ' Loop over the nodes that will be copied to the clipboard. ' Note: The Nodes collection exposed by the event args ' is read-only. For Each node In e.Nodes sb.Append(node.Text) sb.Append(", ") Next sb.Append(" Press ''OK'' or ''Cancel''.") dr = MessageBox.Show(Me, sb.ToString(), "Copying nodes to the clipboard", MessageBoxButtons.OKCancel) If dr = DialogResult.Cancel Then e.Cancel = True End If End Sub
using System.Diagnostics; using Infragistics.Win; using Infragistics.Win.UltraWinTree; private void ultraTree1_BeforeCopy(object sender, Infragistics.Win.UltraWinTree.BeforeCopyEventArgs e) { // Setting the Tag of the Nodes collection passed into the BeforeCut // and BeforeCopy events to some serializable value can be used to // identify the tree that copied the nodes to the clipboard. This Tag // value will be de-serialized and set on the Nodes collection that is // passed into the BeforePaste event. This can be used for preventing // paste operations between trees. // Set the Tag property on the Nodes collection to the tree's hash code. // Note: don't set the tag to the tree itself since that isn't serializable e.Nodes.Tag = this.ultraTree1.GetHashCode(); System.Text.StringBuilder sb = new System.Text.StringBuilder(); sb.Append("The following nodes are about to be copied to the clipboard: "); // Loop over the nodes that will be copied to the clipboard. // Note: The Nodes collection exposed by the event args // is read-only. foreach ( UltraTreeNode node in e.Nodes ) { sb.Append( node.Text ); sb.Append( ", " ); } sb.Append(" Press ''OK'' or ''Cancel''."); DialogResult dr = MessageBox.Show( this, sb.ToString(), "Copying nodes to the clipboard", MessageBoxButtons.OKCancel ); if ( dr == DialogResult.Cancel ) e.Cancel = true; }
Target Platforms: Windows 10, Windows 8.1, Windows 8, Windows 7, Windows Server 2012, Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2