WPF TreeView遞迴非同步繫結

using system;   

using system.collections.generic; 
using system.linq; 
using system.text; 
using system.componentmodel; 
using system.collections.objectmodel; 
namespace departmenttreeview 
set 
} 
private void setcheckstate(bool? value, bool updatechildren, bool updateparent) else if (_ischecked == false) 
propertychanged(this, new propertychangedeventargs("ischecked")); 
if (updatechildren) 
} 
if (updateparent && _parent != null) 
} 
} 
private void verifystate() else if (state != currentstate) 
} 
this.setcheckstate(state, false, true); 
} 
private bool _i***panded; 
public bool i***panded 
set 
if (!haschildren()) 
} 
} 
private object _current; 
public object current 
set 
} 
public string displaytext 
} 
private departmentviewmodel _parent; 
public departmentviewmodel parent 
set 
} 
private list_children; 
public listchildren 
private set 
} 
#endregion 
public static listcreate() 
return root.children; 
} 
private departmentviewmodel(object currentobject) 
/// /// 初始化，用於設定父節點 
/// 
private void init() 
propertychanged(this, new propertychangedeventargs("children")); 
} 
/// /// 載入子節點 
/// 
private void loadchildren() ; 
if (model.ischecked == true) 
children.add(model); 
} 
init(); 
} 
} 
/// /// 判斷是否有子節點（邏輯是：如果只有乙個臨時子節點，說明沒有真正的子節點） 
/// 
/// 
private bool haschildren() 
public observablecollectioncheckeditems 
} 
public event propertychangedeventhandler propertychanged; 
} 
}

using system.collections.generic;   

using system.text; 
using system.windows; 
using system.windows.data; 
using system.windows.documents; 
using system.componentmodel; 
namespace departmenttreeview 
private void button_click(object sender, routedeventargs e) 
messagebox.show("checked items:/n" + builder.tostring()); 
} 
} 
}

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