Good morning , I have a template file written as XML file in this way
<Simulation>
<Pedestrian Name="Mother">
<Initial_Position In_X="3" In_Y="3" />
<Final_Position>
<First Fin_X="6" Fin_Y="6" Time="2" />
</Final_Position>
</Pedestrian>
I implemented a Class in order to read the file.
while (reader.Read() || i<Number_of_pedestrian)
{
if (reader.Name == "Pedestrian")
{
if (reader.HasAttributes == true)
{
name = reader.GetAttribute("Name");
//MessageBox.Show(name);
}
}
if(reader.Name == "Initial_Position")
{
if (reader.GetAttribute("In_X") != null && reader.GetAttribute("In_Y") != null)
{
X1 = int.Parse(reader.GetAttribute("In_X"));
Y1 = int.Parse(reader.GetAttribute("In_Y"));
}
}
if (reader.Name == "Initial_Position")
{
if (reader.GetAttribute("Fin_X") != null && reader.GetAttribute("Fin_Y") != null)
{
X2 = int.Parse(reader.GetAttribute("Fin_X"));
Y2 = int.Parse(reader.GetAttribute("Fin_Y"));
}
}
//Position Initial_Position = new Position (X1,Y1);
//Position Final_Position = new Position(X2, Y2);
Pd[i]=new Pedestrian (name, X1, Y1, X2, Y2);
Pd[i].Draw();
i++;
}
Which is able to read any attribute (in this case " Name ") but is no able to read inside a node and then take the attribute (in this case inside " Initial_Position " and then " In_X ").
Moreover the line Pd[i]=new Pedestrian (name, X1, Y1, X2, Y2);
give me the following error :
System.IndexOutOfRangeException occurs.
Additional Information : index over limits of matrix
Make sure that give desired XML. make sure every tag of your XML has a close tag, make sure that <Pedestrian Name="Mother">
has a closing tag. Then check X's and Y's before executing
Pd[i]=new Pedestrian (name, X1, Y1, X2, Y2);
Pd[i].Draw();
And have a look at Loading XML String into datatable .
Why don't you do this in LINQ to XML instead. It's much simpler and the code is a lot cleaner:
using System.Xml.Linq;
string xml = "<Simulation><Pedestrian Name='Mother'><Initial_Position In_X='3' In_Y='3' /><Final_Position><First Fin_X='6' Fin_Y='6' Time='2' /></Final_Position></Pedestrian></Simulation>";
XDocument doc = XDocument.Parse(xml);
foreach (XElement pedestrian in doc.Root.Elements("Pedestrian"))
{
XElement initialPosition = pedestrian.Element("Initial_Position");
string name = pedestrian.Attribute("Name").Value;
string x = initialPosition.Attribute("In_X").Value;
string y = initialPosition.Attribute("In_Y").Value;
Console.WriteLine("Name - {0}.X - {1}.Y - {2}", name, x, y);
}
Console.ReadKey();
You could use XDocument
and do this.
XDocument doc = XDocument.Parse(input);
var results = doc.Descendants("Pedestrian")
.Select(x=>
new Pedestrian()
{
Name = x.Attribute("Name").Value,
X1 = int.Parse(x.Element("Initial_Position").Attribute("In_X").Value),
Y1 = int.Parse(x.Element("Initial_Position").Attribute("In_Y").Value),
X2 = int.Parse(x.Element("Final_Position").Element("First") .Attribute("Fin_X").Value),
Y2 = int.Parse(x.Element("Final_Position").Element("First") .Attribute("Fin_Y").Value)
});
Output
Name : Mother
X1 : 3
X2 : 6
Y1 : 3
Y2 : 6
Check this Demo
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