wpf - Binding details of a TreeViewItem to a ContextMenu -

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i have contextmenu appears on right click of treeviewitem. pass couple of details treeviewitem context menu.

how starting here:

xaml

<treeview x:class="myapp.treecontrol"          xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"          xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"          xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"           xmlns:d="http://schemas.microsoft.com/expression/blend/2008"           mc:ignorable="d"           d:designheight="300" d:designwidth="300"           previewmouseleftbuttondown="treeview_previewmouseleftbuttondown"           previewmousemove="treeview_previewmousemove"           previewmouserightbuttondown="treecontrol_onpreviewmouserightbuttondown"> <treeview.contextmenu>     <contextmenu>         <menuitem name="dataitem1" header="property1"></menuitem>         <menuitem name="dataitem2" header="property2"></menuitem>         <separator/>         <menuitem name="taskitem" header="tasks" click="taskitem_onclick"></menuitem>     </contextmenu> </treeview.contextmenu> </treeview>

i words property1 , property2 replaced values of properties in treeviewitem right clicked, sort of : {binding selecteditem.property1}

code: (basically highlight clicked node)

private void treecontrol_onpreviewmouserightbuttondown(object sender, mousebuttoneventargs e) {     treeviewitem treeviewitem = visualupwardsearch(e.originalsource dependencyobject);      if (treeviewitem != null)     {         treeviewitem.isselected = true;         treeviewitem.focus();         e.handled = true;     } }

the first thing need data bind menuitem.header properties object set contextmenu.datacontext:

<contextmenu datacontext="{binding placementtarget.tag, relativesource={         relativesource self}}">     <menuitem name="dataitem1" header="{binding property1}"></menuitem>     <menuitem name="dataitem2" header="{binding property2}"></menuitem>     <separator/>     <menuitem name="taskitem" header="tasks" click="taskitem_onclick"></menuitem> </contextmenu>

what placementtarget.tag, hear ask. looking @ contextmenu.placementtarget property page on msdn, see it:

gets or sets uielement relative contextmenu positioned when opens.

in plain english, means the ui element has contextmenu applied it. tag property free property of type object can put into. in case, we're going put contextmenu.datacontext value in there because can't set directly, because contextmenu not part of general ui visual tree:

now didn't show code apply contextmenu treeviewitem, in same place, need set tag property object want set contextmenu.datacontext value. pass in here , take out in contextmenu shown in code example.

for more information, please take @ answers contextmenu.placementtarget not getting set, no idea why , add context menu in datagrid, how select item value questions here on stack overflow.


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