c# - Binding DataTemplateSelector with treeview item programmatically in WPF -

i not able bind data template selector tree view item programmatically. here have created parameterized data template selector , can not bound tree view in xaml. here code data template selector

 public class mytemplate : datatemplateselector     {          private ivm_manytoonemapping _viewmodel;         public mytemplate(ivm_manytoonemapping viewmodel)         {             _viewmodel = viewmodel;         }     } 

tried approach : mytemplate obj= new mytemplate(viewmodel) treeviewlist.itemtemplateselector = obj;

it not working.

this not how datatemplateselector works:

here example:

public class templateselector : datatemplateselector {      //you override function select data template based in given item     public override system.windows.datatemplate selecttemplate(object item,                      system.windows.dependencyobject container)     {         if(item myviewmodel1)             return datatemplate1;         if(item myviewmodel2)             return datatemplate2;         return base.selecttemplate(item, container);     } } 

but if in code behind, why need datatemplateselector?

this nice example, how things bindable , more dynamic