Measurement Studio for .NET Languages
graph freez ui and shows wrong values
Hello,
first at all im using Meassurement Studio 2013.
i have a lot of Timers in my Application. The Timers refresh some Values in my UI.
That works all like a Charme.My BIG Problem is now the GRaph from MEassurement Studio.
With following Code i load the aktual Values and refresh the Graph. If i do this with the Dispatchertimer oder with a normal Threading.Timer the Ui freezes and the Graph too. That caused that the Plots are wrong.
For example a GRaph Screenshot with two Plots. That are calculated Sinus-Curves. But they didn't look like.
So, thats awfull 🙂
Here is my Code
private System.Windows.Threading.DispatcherTimer _timer = new System.Windows.Threading.DispatcherTimer(System.Windows.Threading.DispatcherPriority.Render) { Interval = TimeSpan.FromMilliseconds(100) };
private void _timer_Tick(object sender, EventArgs e)
{
int j = 0;
foreach (var item in this.ConfigurationViewModel.PlotConfigurations)
{
int numberOfPoints = 1;
double[] data = new double[numberOfPoints];
for (int i = 0; i < numberOfPoints; i++)
{
try
{
var val = this.realTimeSystem.GetSingleValue(item.SelectedVariable.Identifier);
if (val == null)
break;
double valD = double.Parse(val.ToString());
data[i] = valD;
}
catch
{
this.logger.Log("Plot Exception for {0}", item.SelectedVariable);
}
}
if (data.Count() > 0)
{
chartCollection[j].Append(data);
}
j++;
}
}
this is my chartcollection
private CustomChartCollection[] _chartCollection;
public CustomChartCollection[] chartCollection
{
get { return _chartCollection; }
set { _chartCollection = value; RaisePropertyChanged("chartCollection"); }
}
chartCollection = new[] {
new CustomChartCollection(),
new CustomChartCollection(),
new CustomChartCollection(),
new CustomChartCollection(),
new CustomChartCollection(),
new CustomChartCollection(),
new CustomChartCollection(),
new CustomChartCollection(),
};
and here the class of the customchartcollection
#region CustomChartCollection-Class
[DataTypeDescriptor(typeof(GraphDataCollectionDescriptor<>))]
public class CustomChartCollection : ChartCollection<double>
{
public CustomChartCollection() : base(100000) { }
protected override void OnDataChanged(GraphCollectionChangedEventArgs e)
{
base.OnDataChanged(new GraphCollectionChangedEventArgs(0));
}
}
#endregion
and here is the XAML of my Graph
<ni:Graph
x:Name="graph"
DataSource="{Binding chartCollection}"
RenderMode="Raster"
PreferIndexData="True"
SuppressScaleLayout="True"
PlotAreaBackground="{Binding GraphBackgroundBrush}"
nix:GraphExtensions.PlotsSource="{Binding Plots2}"
nix:GraphExtensions.AxesSource="{Binding GraphAxes}">
</ni:Graph>
So what i'm doing wrong ? Is the Dispatchertimer with 100 ms to slow ?
Or is it better to work with to Timers and make it with addRange ?
Thanks in advance
Nice Wishes
