Update C# Chart using BackgroundWorker
- by Mark
I am currently trying to update a chart which is on my form to the background worker using:
bwCharter.RunWorkerAsync(chart1);
Which runs:
private void bcCharter_DoWork(object sender, DoWorkEventArgs e)
{
System.Windows.Forms.DataVisualization.Charting.Chart chart = null;
// Convert e.Argument to chart
//..
// Converted..
chart.Series.Clear();
e.Result=chart;
setChart(c.chart);
}
private void setChart(System.Windows.Forms.DataVisualization.Charting.Chart arg)
{
if (chart1.InvokeRequired)
{
chart1.Invoke(new MethodInvoker(delegate { setChart(arg); }));
return;
}
chart1 = arg;
}
However, at the point of clearing the series, an exception is thrown.
Basically, I want to do a whole lot more processing after clearing the series, which slows the GUI down completely - so wanted this in another thread.
I thought that by passing it as an argument, I should be safe, but apparently not!
Interestingly, the chart is on a tab page. I can run this over and over if the tabpage is in the background, but if I run this, look at the chart, hide it again, and re-run, it throws the exception. Obviously, it throws if the chart is in the foreground as well.
Can anyone suggest what I can do differently?
Thanks!
