CODEWITHSUNDEEP
c#winformsflowlayoutpanel
Andrey Danilov
Andrey Danilov

Reputation: 6602

How to remove HorizontalScrollBar in FlowLayoutPanel completely

I have FlowLayoutPanel with multiple controls. Normally horizontal scroll bar is not visible and it is ok. But when I do resize horizontal scroll bar appears and blinks. After resize it is not visible again.

What I tried:

1)

int vertScrollWidth = SystemInformation.VerticalScrollBarWidth;
flowlayoutPanel.Padding = new Padding(0, 0, vertScrollWidth, 0);

That does not work completely.

2)

flowlayoutPanel.AutoScroll = false;
flowlayoutPanel.HorizontalScroll.Enabled = false;
flowlayoutPanel.HorizontalScroll.Visible = false;
flowlayoutPanel.AutoScroll = true;

After that horizontal scroll bar is disabled, but still visible.

3)

flowlayoutPanel.AutoScroll = true;
flowlayoutPanel.WrapContents = false;

That does not work completely.

4)

[DllImport("user32.dll")]
static extern bool ShowScrollBar(IntPtr hWnd, int wBar, bool bShow);

protected override void OnShown(EventArgs e) {
    ShowScrollBar(this.flowlayoutPanel.Handle, SB_HORZ, false);
    base.OnShown(e);
}

That does not work completely.

5)

flowlayoutPanel.SuspendLayout();
//resize controls inside flowlayoutPanel
flowlayoutPanel.ResumeLayout();

Much better, horizontal scroll bar blinks less, but still blinks

6)

//ResizeBegin event
flowlayoutPanel.AutoScroll = false;
//ResizeEnd event
flowlayoutPanel.AutoScroll = true;

That does not work completely.

Upvotes: 1

Views: 464

Answers (1)

Vali Maties
Vali Maties

Reputation: 399

I know it is an old post, but I found myself the solution for this problem. (I did this for VerticalScrollbar, because this was my problem on a TopDown FlowDirection FlowLayoutPanel) but can be transcoded for HorizontalScrollbar as well.

// pContent is my FlowLayoutPanel, it has FlowDirection set to TopDown
// and WrapContent = true;
pContent.SuspendLayout();
// Populate the FlowLayoutPanel with controls
pContent.ResumeLayout();

// I want to show only HorizontalScrollbar
if (pContent.VerticalScroll.Visible)
    {
        pContent.AutoScroll = false;
        pContent.VerticalScroll.Visible = false;
        pContent.Height -= SystemInformation.HorizontalScrollBarHeight;
        pContent.AutoScroll = true;
        pContent.Height += SystemInformation.HorizontalScrollBarHeight;    
    }

So, for hiding HorizontalScrollbar:

// pContent has FlowDirection set to LeftRight and WrapContent = true;
pContent.SuspendLayout();
// Populate the FlowLayoutPanel with controls
pContent.ResumeLayout();

// I want to show only VerticalScrollbar
if (pContent.HorizontalScroll.Visible)
    {
        pContent.AutoScroll = false;
        pContent.HorizontalScroll.Visible = false;
        pContent.Width -= SystemInformation.VerticalScrollBarWidth;
        pContent.AutoScroll = true;
        pContent.Width += SystemInformation.VerticalScrollBarWidth;    
    }

Upvotes: 1

Related Questions