Change Color of Entry Underline or Remove this Color

April 25, 2023

In my .NET MAUI Entry, I wanted to change the Color of the Underline in an Entry in Code-Behind.

Is there a way to do this?

======= Edited with implementation of Answer below ======

Hint: I tried the answer below with an own BorderlessEntryControl which was derived from an Entry Control. There, at least the Placehodler-TextColor got lost. Maybe more Properties

Before

After

>Solution :

For remove the underline on the android, you can add the following code into the MauiProgram.cs:

Microsoft.Maui.Handlers.EntryHandler.Mapper.AppendToMapping(nameof(Entry), (handler, view) =>
        {
#if ANDROID
            handler.PlatformView.SetBackgroundColor(Android.Graphics.Color.Transparent);
#endif
        });

And on the windows platform, you can put the following code into the /Platforms/Windows/App.xaml:

<maui:MauiWinUIApplication.Resources>
        <Thickness x:Key="TextControlBorderThemeThickness">0</Thickness>
        <Thickness x:Key="TextControlBorderThemeThicknessFocused">0</Thickness>
 </maui:MauiWinUIApplication.Resources>

And there is no underline on the ios.