I have a problem to set flowlayoutpanel width size fill instead of given a static size

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I am trying to generating 96 FlowLayoutPanel inside another FlowLayoutPanel, right now I have the size of each FlowLayoutPanel is given fl.Size = new Size(1000, 30);. I need help to change size fl.Size = new Size(Autofill, 30);. so it can fill up the width instead of given a static width size.

Thankyou

What I have tried:

private List<FlowLayoutPanel> listFl96 = new List<FlowLayoutPanel>();
private void Gennerate96FL(int total96)
        {
            fl96.Controls.Clear();
            listFl96.Clear();
            for (int i = 1, loopTo = total96; i <= loopTo; i++)
            {
                var fl = new FlowLayoutPanel();
                fl.Name = $"fl96{i}";
                fl.Size = new Size(1000, 30);
                fl.BackColor = Color.Cornsilk;
                fl.BorderStyle = BorderStyle.FixedSingle;
                fl.Cursor = Cursors.Hand;
                fl.AutoScroll = true;
                fl96.Controls.Add(fl);
                listFl96.Add(fl);
            }
        }

Posted 10-Mar-20 7:28am

Pho Tai Loc

Updated 11-Mar-20 2:55am

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johannesnestler · Answer 1 · 2020-03-11T02:56:00

Hi,

As far as I know there is no good way to express this in Windows.Forms with FlowLayoutPanel because normal "DockStyle.Top" won't work.

so here is a possible example solution:

public partial class Form1 : Form
{
    public Form1()
    {
        InitializeComponent();


        master.Dock = DockStyle.Fill;
        master.SizeChanged += Master_SizeChanged;
        this.Controls.Add(master);

        m_iWidth = master.Width;

        Gennerate96FL(96);
    }

    private void Master_SizeChanged(object sender, EventArgs e)
    {
        if(m_iWidth != master.Width)
        {
            m_iWidth = master.Width;
            foreach (FlowLayoutPanel flp in listFl96)
                flp.Width = m_iWidth;
        }
    }

    int m_iWidth;
    FlowLayoutPanel master = new FlowLayoutPanel();
    private List<FlowLayoutPanel> listFl96 = new List<FlowLayoutPanel>();

    private void Gennerate96FL(int total96)
    {
        master.Controls.Clear();
        listFl96.Clear();
        for (int i = 1, loopTo = total96; i <= loopTo; i++)
        {
            var fl = new FlowLayoutPanel();
            fl.Name = $"fl96{i}";
            fl.Height = 30;
            fl.BackColor = Color.Cornsilk;
            fl.BorderStyle = BorderStyle.FixedSingle;
            fl.Cursor = Cursors.Hand;
            fl.AutoScroll = true;
            fl.Width = m_iWidth;

            master.Controls.Add(fl);
            listFl96.Add(fl);
        }
    }
}

So we set the initial Width of the "child" FlowLayoutPanels to the Width of it's parent FlowLayoutPanel (I called it "master"), and to react to any Width-Changes for the "master" FlowLayoutPanel (which then updates the "childs" Width-properties)
Not a nice solution but it works...