asp.net - Model Binding binding at more than one level -

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i have several forms, require checkbox each province/state. therefore, i've made partial view render checkboxes inside form promote code re-use. when user submits form controller method, regionsviewmodel not binded. overall question is, how can multiple forms share partial view , view model?

here's sample code of situation models

public class form1viewmodel {     /* properties */     public regionsviewmodel regions {set; get;} }  public class form2viewmodel {     /* properties */     public regionsviewmodel regions {set; get;} }  public class form3viewmodel {     /* properties */     public regionsviewmodel regions {set; get;} }  public class regionsviewmodel {     public bool on {set; get;}     public bool qc {set; get;}     /* continues provinces , states */ }

controller

[httppost] public actionresult form(form1vewmodel model) {      //all properties except model.regionviewmodel not bind submitted form :( }

form1viewmodel.aspx

<% using (html.beginform())     {%>     <!-- binds property -->     <% html.renderpartial("controls/regionselector", model.regions); %>     <input type="submit" value="submit form!" /> <%}%>

controls/regionselector.ascx

<%=html.checkboxfor(x => x.availableprovince_on> on <%=html.checkboxfor(x => x.availableprovince_qc> qc <!-- binds provinces , states -->

update replaced "model.regionselectorvm" "model.region". finding bug in demo code darin dimitrov.

what regionselectorvm? seems type of partial. try editor templates. it's cleaner:

<% using (html.beginform()) { %>     <!-- binds property -->     <%= html.editorfor(x => x.regions) %>     <input type="submit" value="submit form!" /> <% } %>

and inside ~/views/shared/editortemplates/regionsviewmodel.ascx:

<%@ control      language="c#"      inherits="system.web.mvc.viewusercontrol<appname.models.regionsviewmodel>" %> <%= html.checkboxfor(x => x.on) %> on <%= html.checkboxfor(x => x.qc) %> qc  <!--       continue inputs provinces , states       part of regionsviewmodel model  -->

now should bind correctly.


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