Switch multi panels on the UserControl

Question

I try to switch panels on tabControls on UserControl. Like this

private void button1_Click(object sender, EventArgs e)
{ 
panel1.Visible=true;
panel2.Visible=false;
.....
panelN.Visible=false;
}
    private void button2_Click(object sender, EventArgs e)
{ 
panel1.Visible=false;
panel2.Visible=true;
.....
panelN.Visible=false;
}

    private void buttonN_Click(object sender, EventArgs e)
{ 
panel1.Visible=false;
panel2.Visible=false;
.....
panelN.Visible=true;
}

but when N exceeds 6, switching panels doesn't work well.

Some panels don't visible ,even if the Button event occurs!

So could you tell me how to switch multi panels.

If possible, could you tell me the smart way to switch panels.

The above code seems to be bad readability.

`TabControl` has a `SelectedIndex` property to switch to another tab — Alexey S. Larionov, Jun 26 '20 at 12:03
You can try replacing all your panels with another `TabControl` (i.e. make another `TabControl` on a page of your `TabControl`). Then disable headings of this new tab control [like it's suggested here](https://stackoverflow.com/questions/1465443/hide-the-tabcontrol-header). Then switch between your panels via the new `TabControl.SelectedIndex` — Alexey S. Larionov, Jun 26 '20 at 12:11
Try bring the panel to Front. It may not be seen if it is behind another control. — jdweng, Jun 26 '20 at 12:43

score 0 · Answer 1 · answered Jun 26 '20 at 14:17

You could make all of the buttons fire the same handler, then do something like this:

private void btn_Clicked(object sender, EventArgs e)
{
    Button btn = (Button)sender;
    int numButtons = 6;
    int index = int.Parse(btn.Name.Replace("button", ""));
    for(int i=1; i<=numButtons; i++)
    {
        Control ctl = this.Controls.Find("panel" + i, true).FirstOrDefault();
        if (ctl != null)
        {
            ctl.Visible = (i == index);
            if (i == index)
            {
                ctl.BringToFront();
            }
        }
    }
}

Switch multi panels on the UserControl

1 Answers1