CODEWITHSUNDEEP
c#winformsbuttonbackcolor
Lionel Pöffel
Lionel Pöffel

Reputation: 53

C#: Changing Button BackColor has no effect

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, every modification to those buttons (location and size) except for the modification of the BackColor is readily executed. Only the button's color remains unchanged.

The code looks something like this:

public class SimpleSortAlgDisplayer : ISortAlgDisplayer
{

    #region ISortAlgDisplayer Member

    void ISortAlgDisplayer.Init(int[] Data)
    {
        this.DataLength = Data.Length;
        this.DispWin = new CurrentSortStateWin();
        this.DispWin.Show();
        this.DispWin.Size = new Size(60 + (10 * this.DataLength), 120);

        this.myArrayElements = new Button[this.DataLength];
        for (int i = 0; i < this.DataLength; i++)
        {
            this.myArrayElements[i] = new Button();
            //begin of series of invoked actions

            this.myArrayElements[i].Size=new Size(5,(int)(((80)*(double)Data[i])/1000));
            this.myArrayElements[i].Location = new Point(30 + (i * 10), 90-(this.myArrayElements[i].Size.Height));
            this.myArrayElements[i].Enabled = true;
            this.myArrayElements[i].BackColor = Color.MidnightBlue;
            this.myArrayElements[i].UseVisualStyleBackColor = true;
            this.DispWin.Controls.Add(this.myArrayElements[i]);
            this.myArrayElements[i].Refresh();

        }
    }

Ideas anyone?

A similar question was asked here but the answers to it were not very helpful:

Where am I going wrong?

Upvotes: 5

Views: 24566

Answers (4)

Aslam Murtuza
Aslam Murtuza

Reputation: 31

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.

Upvotes: 0

PUG
PUG

Reputation: 4472

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

Upvotes: 4

Robert Deml
Robert Deml

Reputation: 12532

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

Upvotes: 1

balexandre
balexandre

Reputation: 75073

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

enter image description here

Upvotes: 11

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