Hide/Show Windows Forms panel in C# [closed]

Answer 1

No need to use variables and condition. Just add panel1.Visible = false; or panel1.Visible = true; on button click

Answer 2

Don't use global variable like show1 and show2 You can do like this instead.

private void button1_Click(object sender, EventArgs e)
{
    panel1.Visible = !panel1.Visible; 
    Application.DoEvents();
}

Answer 3

Don't use flags, because your button behavior will be determined by the states of the flags.

Best is to code it the way you want. If you want each Button to make the corresponding panel visible while other panel invisible:

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

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

Or, if you want each button to control the visibility of each panel independently, do this:

private void button1_Click(object sender, EventArgs e)
{
     panel1.Visible = !panel1.Visible;
     //Application.DoEvents();
}

private void button2_Click(object sender, EventArgs e)
{
     panel2.Visible = !panel2.Visible;
     //Application.DoEvents();
}

Lastly, the Application.DoEvents() can be removed (credit to Thorsten Dittmar) as the control will immediately back to UI thread after the Click method finishes anyway. Read his comment and the referred link.

Answer 4

You may find the solution but I just want to recommend you to use SuspendLayout() and ResumeLayout() for performance improvement while changing control states

private void button1_Click(object sender, EventArgs e)
{
     this.SuspendLayout();
     panel1.Visible = true;
     panel2.Visible = false;
     this.ResumeLayout();
     //Application.DoEvents();
}

private void button2_Click(object sender, EventArgs e)
{
     this.SuspendLayout();
     panel2.Visible = true;
     panel1.Visible = false;
     this.ResumeLayout();
     //Application.DoEvents();
}