C# Line chart axis points

Question

I have an application that uses a line chart. Every second my application reads a value and its recording time from database and add that value and its recording time to a line chart. Value is in Y axis and record time is in X axis.

My line chart's x points increase one by one every seconds. I want line chart have more x points with no Y values when it is first created (about 60 points of seconds when it is first created). How can i do that?

Note : recording time is DateTime. It shows hours minutes and seconds

Answer 1

You just need to set the minimum and maximum value for the X axis of your chart before adding points to it.

Assuming your chart has index CHART_INDEX, and that the start and end times are of type DateTime , do this:

var xAxis = yourChart.ChartAreas[CHART_INDEX].AxisX;
xAxis.Minimum = myStartTime.ToOADate();
xAxis.Maximum = myEndTime.ToOADate();