c# - Binding.UpdateSourceTrigger giving XamlParseException/TargetInvocationException in WPF -

i'm trying apply trigger follows:

using smartrouteplanner.models; ... map locationmap = new map();  locationtextbox.datacontext = locationmap;  binding locationbinding = new binding("location"); locationtextbox.setbinding(textbox.textproperty, locationbinding); locationbinding.updatesourcetrigger = updatesourcetrigger.explicit; 

and xaml code this:

... xmlns:models="clr-namespace:smartrouteplanner.models" ... <grid.resources>     <models:map x:key="mapdatasource"/> </grid.resources> <grid.datacontext>     <binding source="{staticresource mapdatasource}" /> </grid.datacontext> <textbox x:name="locationtextbox" /> 

what causing exceptions?

in xaml should this:

<window x:class="teste.window1"         xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"         xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"         title="window1" height="300" width="300">     <grid>         <textbox text="{binding propertyfromdatacontext, updatesourcetrigger=explicit}" />     </grid> </window> 

remember bind property datacontext!