ASPxTreeList的右键按钮事件

ASPxTreeList应该是比较长用的控件了~现在就来说说它的右键按钮事件

这里实现的是右键里有折合和展开所有节点的功能

code：

 <dx:ASPxTreeList ID="ASPxTreeList2"  ClientInstanceName="treelist1" runat="server" AutoGenerateColumns="False" DataSourceID="SqlDataSource1" Height="400px" KeyFieldName="id" ParentFieldName="parent_id" Width="200px" OnHtmlDataCellPrepared="ASPxTreeList2_HtmlDataCellPrepared" OnHtmlRowPrepared="ASPxTreeList2_HtmlRowPrepared">
                      <Columns>
                         <dx:TreeListTextColumn FieldName="child_id" Visible="False" VisibleIndex="0">
                         </dx:TreeListTextColumn>
                         <dx:TreeListTextColumn Caption="后台管理" FieldName="name" VisibleIndex="1" Name="name">
                         </dx:TreeListTextColumn>
                         <dx:TreeListTextColumn FieldName="id" Visible="False" VisibleIndex="2">
                         </dx:TreeListTextColumn>
                         <dx:TreeListTextColumn FieldName="parent_id" Visible="False" VisibleIndex="3">
                         </dx:TreeListTextColumn>
                     </Columns>
                     <Settings ShowTreeLines="False" />
                     <SettingsBehavior AllowDragDrop="False" AllowFocusedNode="True" AllowSort="False" AutoExpandAllNodes="True" />
                     <%--<Images SpriteImageUrl="/image/backgroud3.jpg">
                     </Images>--%>
                     <SettingsCustomizationWindow Enabled="True" />
                     <Images SpriteImageUrl="/image/backgroud1.jpg">
                     </Images>
                     <ClientSideEvents ContextMenu="function(s, e) {
     if(e.objectType == &quot;Node&quot;)
     {
         rightmenu.ShowAtPos(ASPxClientUtils.GetEventX(e.htmlEvent),
         ASPxClientUtils.GetEventY(e.htmlEvent));
     }
 }" />
                     <BackgroundImage ImageUrl="/image/backgroud3.jpg"  />

                 </dx:ASPxTreeList>

<dx:ASPxPopupMenu runat="server" ID="rightmenu1" ClientInstanceName ="rightmenu" EnableTheming="True" Theme="PlasticBlue">
                    <ClientSideEvents ItemClick="function(s, e) {
    if(e.item.name==&quot;expandall&quot;)
    {    treelist1.ExpandAll();
        return;
    }
    if(e.item.name==&quot;collapseall&quot;)
    {
        treelist1.CollapseAll();
        return;
    }
} " />
          <Items>
               <dx:MenuItem Name="expandall" Text="展开所有"></dx:MenuItem>
               <dx:MenuItem Name="collapseall" Text="关闭所有"></dx:MenuItem>
          </Items>
 </dx:ASPxPopupMenu>