WPF - Access any control inside Template control

Following is code to get the control

[ControlType] objName = ([ControlType])ParentControlName.Template.FindName("ControlName", ParentControlName);

Ex:- 

Below is the code to get the scroll viewer of combo box and set to top

ScrollViewer cmbScrollViewer = ScrollViewer)cmbName.Template.FindName("DropDownScrollViewer", cmbName);

cmbScrollViewer.ScrollToHome();

  

Style Control template of combo box maybe as below

<ControlTemplate TargetType="{x:Type ComboBox}">

…. 

<ScrollViewer HorizontalScrollBarVisibility="Auto" VerticalScrollBarVisibility="Auto"x:Name="DropDownScrollViewer" Template="{DynamicResource ScrollViewerTemplate}" MaxWidth="330"MaxHeight="{TemplateBinding MaxDropDownHeight}">

        <ItemsPresenter/>

</ScrollViewer>

…. 

</ControlTemplate>