c# - Binding my changing data context in WPF -


i've seen slight variations on request - i'm having hard time getting work situtaion. have application user selection of combobox drive event. grabs data database , want bind data ui. thought had binding set correclty, can't happen. can see code calculation firing correctly, don't see feedback regarding binding. i'm pretty new wpf , still trying wrap head around (i come mvc web world) pointers appreciated. thanks.

mainwindow code behind:

public mainwindow() {     initializecomponent();     datacontext = new mainwindowviewmodel(); }  private void cboallclients_selectionchanged(object sender, selectionchangedeventargs e) {     mainwindowviewmodel vm = datacontext mainwindowviewmodel;     listclient selectedclient = e.addeditems[0] listclient;     credit.calc c = new credit.calc();     c.calccredit(selectedclient.clientname);     vm.ffcredits = c.fundfamilycredits;     vm.fundcredits = c.fundcredits;     datacontext = vm; }

main window xaml (abbreviated binding issue)

<listbox x:name="lbfundfamily" width="auto" height="auto"          background="transparent" borderthickness="0">     <listbox.datacontext>         <binding source="ffcredits"></binding>     </listbox.datacontext>     <listbox.itemtemplate>         <datatemplate>             <grid>                 <grid.rowdefinitions>                     <rowdefinition height="20"></rowdefinition>                 </grid.rowdefinitions>                 <grid.columndefinitions>                     <columndefinition width="auto"></columndefinition>                 </grid.columndefinitions>                 <textblock text="{binding path=fundfamilyname}"                            grid.row="0" grid.column="0"                            background="white" fontsize="14" foreground="black">                 </textblock>                 <!--<rectangle width="{binding path=brokercreditlist.utilization}"                                height="20" grid.row="0" grid.column="1"></rectangle>-->                 <!--<textblock text="{binding path=brokercreditlist.}"></textblock>-->             </grid>         </datatemplate>     </listbox.itemtemplate> </listbox>


mainwindowviewmodel:

class mainwindowviewmodel : baseviewmodel {     public list<listclient> allclients { get; set; }     public observablecollection<fundfamilysum> ffcredits { get; set; }     public observablecollection<fundsum> fundcredits { get; set; }      public mainwindowviewmodel()     {         using (agencymodelentities db = new agencymodelentities())         {             allclients = db.listclients.tolist();             ffcredits = new observablecollection<fundfamilysum>();             fundcredits = new observablecollection<fundsum>();         }     } }

initially when view loaded, listbox bound vm.ffcredits new observablecollection<fundfamilysum>();

but view not know ffcredits has changed unless propertychanged notification raised still bound new observablecollection<fundfamilysum>();.

i think expecting changes picked setting datacontext = vm again. not work vm datacontext.


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