You can try to use FrameworkElement.FindName() method passing control name as method parameter, for example :
var ach = (CheckBox)this.FindName(arr[0]);
Frage
The heading may not clearly explain what I'm trying to achieve. This is what I need. I have an array of strings. There is a UI element with that name. Eg arr[0] has Ach. There is a checkbox with name Ach.
How do I use the string Ach and refer it to the checkbox named Ach?
Lösung
You can try to use FrameworkElement.FindName() method passing control name as method parameter, for example :
var ach = (CheckBox)this.FindName(arr[0]);