How to assign Watermark property to a TextBox's Text in code behind (MahApps)

Question

<TextBox
        Name="mytextBox"
        Controls:TextBoxHelper.Watermark="User"
        Controls:TextBoxHelper.ClearTextButton="True" />

I have ComboBox and each index i want to change this Watermark accordingly. Is it possible to change this Property via code behind ?

Answer 1

If mytextBox is not inside template or different name scope and you can access it by name in the code you can either use static method of TextBoxHelper

TextBoxHelper.SetWatermark(mytextBox, "New Value");

or set it directly

mytextBox.SetValue(TextBoxHelper.WatermarkProperty, "New Value");