wpf - Caliburn Micro Message.attach does not consider changes of datacontext -

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this simplified example. have usercontrol contains "browse folder" functionality, using textbox , button. clicking button open browse-dialog, , fill in textbox.

<usercontrol x:class="myusercontrol"          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"           xmlns:cal="http://www.caliburnproject.org"          mc:ignorable="d"           d:designheight="300" d:designwidth="300"> <grid>     <grid.columndefinitions>         <columndefinition width="100"></columndefinition>         <columndefinition width="*"></columndefinition>     </grid.columndefinitions>      <grid.rowdefinitions>         <rowdefinition height="auto"></rowdefinition>     </grid.rowdefinitions>      <!-- folder -->     <textblock>path</textblock>     <dockpanel lastchildfill="true" grid.column="1">         <button dockpanel.dock="right" cal:message.attach="[event click] = [action browsehotfolder()]" content="..." horizontalalignment="left" width="25" height="25" verticalcontentalignment="center" horizontalcontentalignment="center" margin="0,0,5,0"/>         <textbox text="{binding hotfolderpath, updatesourcetrigger=propertychanged, validatesonnotifydataerrors=true}"  />     </dockpanel> </grid>

i have listbox contains number of objects. selected object fed usercontrol datacontext.

<window>    ...    <listbox itemssource="{binding items, mode=oneway}" selecteditem="{binding selecteditem}">    ...    <view:myusercontrol datacontext="{binding selecteditem}" /> </window>

now, let's have 2 items in listbox , have first 1 selected. fill in "foo" in textbox of myusercontrol. select second item, , fill in "bar". databinding works fine, , both items have correct values set. if click browse button on first 1 , select folder, change textbox of first item selected path. however, if select second item, , browse folder change first item's textbox.

my guess message attach syntax not call browse action on correct item. disregards datacontext (currently selected item) , uses first one.

what can this?

i think guess correct; target used message.attach first data context bound, , not update when context changed after user selection.

we saw similar problem user controls switched in content control - fix specify cal:action.targetwithoutcontext="{binding}" on button.

the issue mentioned here rob eisenberg: https://caliburnmicro.codeplex.com/discussions/257005


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