How to make a random color by clicking on the Button and have the Rectangle change color?

Question

WPF

by clicking on the Button, you need the Rectangle to change color randomly in C # (wpf)

Answer 1

Let's take this window as an example:

<Grid>
  <Grid.RowDefinitions>
    <RowDefinition/>
    <RowDefinition/>
  </Grid.RowDefinitions>

  <Button Content="Change color"
      Click="Button_Click"
      Margin="15"/>

  <Rectangle Name="MyRectangle" 
         Grid.Row="1" 
         Margin="15"
         Fill="Red"/>
</Grid>

Let's declare 2 variables in the window class:

private List<SolidColorBrush> brushes;
private Random rnd;

We initialize in the constructor:

public MainWindow()
{
  InitializeComponent();

  rnd = new Random();
  brushes = new List<SolidColorBrush> //заполняем цвета, которые будет принимать Rectangle
  {
    Brushes.AliceBlue,
    Brushes.AntiqueWhite,
    Brushes.Aqua,
    Brushes.Aquamarine
  };
}

And finally the button code:

private void Button_Click(object sender, RoutedEventArgs e)
{
  MyRectangle.Fill = brushes[rnd.Next(0, brushes.Count)];
}