WPF Silverlight Gets child controls (gets child controls in DataTemplate)

 Public Static classvisualtreeextensions {/// <summary>        ///Get parent Node control/// </summary>        /// <typeparam name= "T" >child control UI</typeparam>        /// <param name= "obj" >child controls</param>        /// <param name= "name" >Parent container Name</param>        /// <returns>Parent Container Object</returns>         Public StaticT getparent<t> ( ThisDependencyObject obj,stringName =NULL)wheret:frameworkelement {DependencyObject parent=visualtreehelper.getparent (obj);  while(Parent! =NULL)            {                if(Parent isT && (((T) parent). Name = = Name | |string. IsNullOrEmpty (name))) {return(T) parent; } Parent=visualtreehelper.getparent (parent); }            return NULL; }        /// <summary>        ///Get child controls/// </summary>        /// <typeparam name= "T" >UI Type</typeparam>        /// <param name= "obj" >Parent Container Object</param>        /// <param name= "name" >child control Name</param>        /// <returns>child controls</returns>         Public StaticT getchild<t> ( ThisDependencyObject obj,stringName =NULL)wheret:frameworkelement {DependencyObject child=NULL; T grandchild=NULL;  for(inti =0; I <= visualtreehelper.getchildrencount (obj)-1; i++) { child=visualtreehelper.getchild (obj, i); if(Child isT && ((T) child). Name = = Name |string. IsNullOrEmpty (name))) {return(T) child; }                Else{grandchild= getchild<t>(child, name); if(Grandchild! =NULL)                        returngrandchild; }            }            return NULL; }        /// <summary>        ///Get child Controls collection/// </summary>        /// <typeparam name= "T" >UI Type</typeparam>        /// <param name= "obj" >Parent Container Object</param>        /// <param name= "name" >child control Name</param>        /// <returns>Child Controls Collection</returns>         Public StaticList<t> getchildren<t> ( ThisDependencyObject obj,stringName =NULL)wheret:frameworkelement {DependencyObject child=NULL; List<T> childlist =NewList<t>();  for(inti =0; I <= visualtreehelper.getchildrencount (obj)-1; i++) { child=visualtreehelper.getchild (obj, i); if(Child isT && ((T) child). Name = = Name | |string.                IsNullOrEmpty (name)) {Childlist.add ((T) child); } childlist.addrange (GetChildren<T> (Child,"")); }            returnchildlist; }        /// <summary>        ///find all given type of child controls collection under a control/// </summary>        /// <typeparam name= "T" >type of child control to find</typeparam>        /// <param name= "Depobj" >Parent Control</param>        /// <returns>Child Controls Collection</returns>         Public StaticT findvisualchild<t> ( ThisDependencyObject Depobj,stringChildName =NULL)wheret:frameworkelement {if(Depobj! =NULL)            {                 for(inti =0; I < Visualtreehelper.getchildrencount (depobj); i++) {DependencyObject child=Visualtreehelper.getchild (Depobj, i); if(Child! =NULL&& Child isT &&(((T) child). Name= = ChildName | |string. IsNullOrEmpty (ChildName))) {return(T) child; }                    Else{T Childofchild= findvisualchild<t>(Child, ChildName); if(Childofchild! =NULL&& Childofchild isT) {returnChildofchild; }                    }                }                return NULL; }            return NULL; }        /// <summary>        ///find all given type of child controls collection under a control/// </summary>        /// <typeparam name= "T" >type of child control to find</typeparam>        /// <param name= "Depobj" >Parent Control</param>        /// <returns>Child Controls Collection</returns>         Public StaticList<t> findvisualchildren<t> ( ThisDependencyObject Depobj,stringChildName =NULL)wheret:frameworkelement {List<T> list =NewList<t>(); if(Depobj! =NULL)            {                 for(inti =0; I < Visualtreehelper.getchildrencount (depobj); i++) {DependencyObject child=Visualtreehelper.getchild (Depobj, i); if(Child! =NULL&& Child isT&& ((T) child). Name = = ChildName | |string. IsNullOrEmpty (ChildName)) {list.                    ADD ((T) child); } List<T> ChildItems = findvisualchildren<t>(Child, ChildName); if(ChildItems! =NULL&& Childitems.count >0)                    {                        foreach(varIteminchChildItems) {list.                        ADD (item); }                    }                }            }            returnlist; }    }

WPF Silverlight Gets child controls (gets child controls in DataTemplate)