Xamarin Windows Entry background Color

Question

In my Xamarin forms application i need to change the background color of an Entry control when it got foucs. I added custom renderers but the default white color is not changing when it has focus in Windows application. It is working fine in ios and android. Here is my custom renderer for windows.

public class MyCustomEntryRenderer : EntryRenderer
{
   protected override void OnElementChanged(ElementChangedEventArgs e)
   {
       if (Control != null)
       {
           Control.Foreground = new SolidColorBrush(Colors.Transparent);
           Control.Background = new SolidColorBrush(Colors.Transparent);
       }
       base.OnElementChanged(e);
   }

   protected override void OnElementPropertyChanged(object sender, 
                                            System.ComponentModel.PropertyChangedEventArgs e)
   {
       if (Control != null)
       {
           Control.Foreground = new SolidColorBrush(Colors.Transparent);
           Control.Background = new SolidColorBrush(Colors.Transparent);
       }
       base.OnElementPropertyChanged(sender, e);
   }
}

iwanlenin · Accepted Answer

You need to override the default TextBox style. Here is the default style You can add the style inside the App.xaml like this:

Now you can overide the "Focused" VisualState:

And comment, delete or override "Opacity"

Now inside your Renderer you need to load the style and add for your TextBox:

private TextBox nativeControl;
private CustomEntry customControl;
protected override void 
OnElementChanged(ElementChangedEventArgs e)
{
  base.OnElementChanged(e);

  this.customControl = e.NewElement;
  this.nativeControl = new TextBox();

  var style  = App.Current.Resources["CustomTextBoxStyle"] as    Windows.UI.Xaml.Style;
  this.nativeControl.Style = style;
  this.SetNativeControl(nativeControl);
}

Now you have a Red color on background if TextBox is Focused

Xamarin Windows Entry background Color

Answers (2)

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