Changing existing curve visibility ?

[MachoGrump]

Hi,
I am using C#.

I have been trying to change an existing curve visibility using a form button and so far I have had no luck.

The curve has already been generated and drawn from my Plot_Chart method.

All the button does is either make the existing curve visible or invisible using a Click event.

This is the button code I have been trying, but I get an System.ArgumentNullException error:

private void TEST1(object sender,System.EventArgs e) //Button Click event to remove
{
MyChart.GraphPane.CurveList.Clear();
}

private void TEST2(object sender,System.EventArgs e) //Button Click event to show myCurve
{
MyChart.GraphPane.CurveList.Add(myCurve);
}

Any help will be appreciated, thankyou.

[MachoGrump]

Thank you very much,

MyChart.GraphPane.CurveList[0].IsVisible = false; worked great.

It was even better once I figured (0) is for the very first list loaded, (1) for the second loaded etc...

Thx for this great tool John.

[John Champion]

Hi,
Did you verify that MyChart is not null? Also, you can make a curve invisible with:

MyChart.GraphPane.CurveList[0].IsVisible = false;

in this way you don't actually have to delete it. You need to call the Invalidate() or Refresh() method to update the display after making this change.
John