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>

C# - How to get Property Name as string by Property Type

Create a static class for Property Helper with GetPropertyName method

public static class PropertyHelper<T>

    {

        public static string GetPropertyName<TPropObject>(Expression<Func<T, TPropObject>> propertyValue)

        {

            return ((MemberExpression)propertyValue.Body).Member.Name;

        }

    }

Call like below to get the PropertyName as string

PropertyHelper<YourClass>.GetPropertyName(r => r.YourProperty)