To find the Control Whether it may be a Checkbox,TextBox,Loader,ImageBrush whatever it may be By using the Following code you can find the control in LongListSelector and do respective actions like enabling,disabling,hiding etc.For Example this is my LongListSelector I need to find a control and Hide it

  1. <phone:LongListSelector
  2. x:Name="AddrBook"
  3. JumpListStyle="{StaticResource AddrBookJumpListStyle}"
  4. Background="Transparent"
  5. GroupHeaderTemplate="{StaticResource AddrBookGroupHeaderTemplate}"
  6. ItemTemplate="{StaticResource AddrBookItemTemplate}"
  7. LayoutMode="List"
  8. IsGroupingEnabled="true"
  9. HideEmptyGroups ="true"/>

This is my Data Template of LongListSelector.

  1. <DataTemplate x:Key="AddrBookItemTemplate">
  2. <StackPanel VerticalAlignment="Top">
  3. <TextBlock FontWeight="Bold" Text="{Binding FirstName}" />
  4. <TextBlock Text="{Binding LastName}" />
  5. <TextBlock Text="{Binding Address}" />
  6. <TextBlock Text="{Binding Phone}" />
  7. </StackPanel>
  8. </DataTemplate>

So What can I Do is I can Simply use the following code to get what control I want from the longlistselector .

Use the Below Code Wherever you wish to get Control inside LLS

  1. LongListSelector myControl= (AddrBook as LongListSelector);
  2. SearchVisualTree(myControl); //Finding The TextBlock In LongListSelector(in My Case)
  1. private void SearchVisualTree(DependencyObject targetElement)
  2. {
  3. var count = VisualTreeHelper.GetChildrenCount(targetElement);
  4. if (count == 0)
  5. return;
  6. for (int i = 0; i < count; i++)
  7. {
  8. var child = VisualTreeHelper.GetChild(targetElement, i);
  9. if (child is TextBlock) //Setting Control to be Find {
  10. TextBlock targetItem = (TextBlock)child;
  13. if (targetItem.Visibility == System.Windows.Visibility.Visible)
  14. {
  15. targetItem.Visibility = System.Windows.Visibility.Collapsed;
  16. return; //Setting visual Property of TextBlock to Collapsed
  17. }
  18. }
  19. else
  20. {
  21. SearchVisualTree(child);
  22. }
  23. }
  24. }
Now its Done!Cheers

Thank You !