C#: Changing Button BackColor has no effect

Question

I\'m having a problem with C# buttons in Windows Forms.

I\'ve create a number of buttons programmatically and add them to a form afterwards.

Interestingly, e

Answer 1

If FlatStyle for button is set to System, it will not show any backcolor rather use backcolor from template of system colors.

Answer 2

You are trying to set up the color, but then you override it saying UseVisualStyleBackColor = true

if you want to use your custom color, you need to set UseVisualStyleBackColor to false or the color will only be applied to the button upon mouse over.

a simple test uploaded to GitHub

public partial class mainForm : Form
{
    Random randonGen = new Random();

    public mainForm()
    {
        InitializeComponent();
    }

    private void mainForm_Load(object sender, EventArgs e)
    {
        populate();
    }

    private void populate()
    {
        Control[] buttonsLeft = createButtons().ToArray();
        Control[] buttonsRight = createButtons().ToArray();

        pRight.Controls.AddRange(buttonsRight);
        pLeft.Controls.AddRange(buttonsLeft);
    }

    private List<Button> createButtons()
    {
        List<Button> buttons = new List<Button>();

        for (int i = 1; i <= 5; i++)
        {

            buttons.Add(
                new Button()
                {
                    Size = new Size(200, 35),
                    Enabled = true,
                    BackColor = GetColor(),
                    ForeColor = GetColor(),
                    UseVisualStyleBackColor = false,
                    Left = 20,
                    Top = (i * 40),
                    Text = String.Concat("Button ", i)
                });
        }

        return buttons;
    }

    private Color GetColor()
    {
        return Color.FromArgb(randonGen.Next(255), randonGen.Next(255), randonGen.Next(255));
    }
}

result

Answer 3

Make sure you do not have a BackgroundImage set. This overrides the BackColor.

Answer 4

In the properties window for Button. Look for 'FlatStyle' property and change it from 'System' to 'Flat', 'Standard' or 'Popup' and you will be able to see the button color change. I just fixed my issue with this.