how 2 add a movable vertical line in a graph of xy axis wpf

Question

Hi,
 
I have a need to have a movable slider on line charts. The way it should work is as follows:
 
1. Slider/Cursor should be parallel to Y-axis i.e. vertical axis
 
2. When user moves this slider, corresponding/intersecting Y values on all graphs show up in labels just like a stock ticker chart.
 
3 the intersection of slier with the graph line ,the value should be displayed in textbox
 


 
Thanks,
avinash

Answer 1

Unless I'm missing something here, I'd have thought that you should be able to create an XmlDocument and then use its LoadXml method to load the XML string you've received from the serial device without needing to save it to a file first.

You can then create an XPathNavigator by calling the XmlDocument's CreateNavigator method.

So, in code, that would be be something like this:

XmlDocument doc = new XmlDocument();
doc.LoadXml (xmlString);
XPathNavigator nav = doc.CreateNavigator();

Alternatively, you could forget about XPathNavigator and use LINQ to XML which can certainly parse in-memory XML strings.