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C # - add all elements of system.drwaing.color to the list?

I am trying to populate my list with system.drwaing.color elements to select a random color and set it to backColor.

Here is my code:

List<Color> myList = new List<Color>(); //rc.Add(Color.Chartreuse); //rc.Add(Color.DeepSkyBlue); //rc.Add(Color.MediumPurple); foreach (Color clr in System.Drawing.Color) { //error } Random random = new Random(); Color color = myList[random.Next(myList.Count - 1)]; this.BackColor = color;

Error: "System.Drawing.Color" is a "type" that is not valid in this context

Can anyone give me a hand?

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5 answers
 public static List<Color> ColorStructToList() { return typeof(Color).GetProperties(BindingFlags.Static | BindingFlags.DeclaredOnly | BindingFlags.Public) .Select(c => (Color)c.GetValue(null, null)) .ToList(); }

List<Color> colorList = ColorStructToList();

 private void randomBackgroundColorButton_Click(object sender, EventArgs e) { List<Color> myList = ColorStructToList(); Random random = new Random(); Color color = myList[random.Next(myList.Count - 1)]; this.BackColor = color; } public static List<Color> ColorStructToList() { return typeof(Color).GetProperties(BindingFlags.Static | BindingFlags.DeclaredOnly | BindingFlags.Public) .Select(c => (Color)c.GetValue(null, null)) .ToList(); }
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From this question :

 string[] colors = Enum.GetNames(typeof(System.Drawing.KnownColor));
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Here is your code:

 private List<Color> GetAllColors() { List<Color> allColors = new List<Color>(); foreach (PropertyInfo property in typeof(Color).GetProperties()) { if (property.PropertyType == typeof(Color)) { allColors.Add((Color)property.GetValue(null)); } } return allColors; }
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Based on Artxzta's answer, at VB.net:

 Imports System.Reflection Dim allColors As New List(Of String) For Each [property] As PropertyInfo In GetType(Colors).GetProperties() allColors.Add([property].Name) Next
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My scenario is as follows, and I hope someone finds it useful:

I have a ComboBox control in a wpf window in which I want to display all the colors from the Brushes class.

MainWindow.xaml

In the window declaration, I added the following link:

  xmlns:converters="clr-namespace:MyProjectName.Converters"

In the Window.Resources section, I registered a converter named "ColorConverter":

  <converters:StringToColorConverter x:Key="ColorConverter"/>

And somewhere in my xaml code I implemented the following combo box:

 <ComboBox Grid.Column="1" Grid.Row="3" ItemsSource="{Binding VBColors}" Margin="5,5,0,5" HorizontalContentAlignment="Stretch"> <ComboBox.ItemTemplate> <DataTemplate> <Rectangle Height="20" Fill="{Binding Path=., Converter={StaticResource ColorConverter}}"/> </DataTemplate> </ComboBox.ItemTemplate> </ComboBox>

MainWindow.cs

  private List<string> _vbColors = typeof(Brushes).GetProperties().Select(x => x.Name).ToList(); public List<string> VBColors { get { return _vbColors; } }

StringToColorsConverter.cs

  [ValueConversion(typeof(bool), typeof(SolidColorBrush))] public sealed class StringToColorConverter : IValueConverter { public object Convert(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture) { var stringValue = (string)value; SolidColorBrush solidColor = (SolidColorBrush)new BrushConverter().ConvertFromString(stringValue); return solidColor; } public object ConvertBack(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture) { throw new NotImplementedException(); } }

Some tips ....

In the ComboBox.ItemTemplate binding you will find the binding to "Binding Path =". => Since the color list is not a list of objects, but a list of strings, Binding Path =. this is a way to bind a control to a string name

Also ... Set te ComboBox HorizontalContentAlignment = "Stretch" to stretch the rectangle to the width of the ComboBox ... try to see the difference.

Keep coding, jj

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