XML reader not reading properly

Question

I am trying to use a xml reader to read an url which holds an xml. I am getting an error saying that the strings are null

        public void readEyeData()
        {
            XmlTextReader reader = new XmlTextReader(ExamInfo.eyeURL);

            while (reader.Read() && !(reader.NodeType == XmlNodeType.EndElement && reader.Name == "point"))
            {
                if (reader.NodeType == XmlNodeType.Element)
                {
                    switch (reader.Name)
                    {
                        case "point":
                            var xString = reader.GetAttribute("x");
                            var yString = reader.GetAttribute("y");

                            float x = Int32.Parse(xString);
                            float y = Int32.Parse(yString);
                            view.EyeMove(x, y);
                            break;
                    }
                }
            }
}

And this is a sample of the xml. Im not sure if I am using the reader properly

<studentMovements>
<eyeCoordinates>
<point>
<x>533</x>
<y>521</y>
<ts>522332022.281823</ts>
</point>
<point>
<x>538</x>
<y>521</y>
<ts>522332029.325239</ts>
</point>
<point>
<x>592</x>
<y>529</y>
<ts>522332058.340718</ts>
</point>

Please help thanks!

Read the message again. Does it mean anything to you? `The remote server returned an error: (404) Not Found. '` — L.B, Sep 03 '17 at 22:44
Ah ok so i fixed the url but now I am getting another exception when I am trying to parse the strings. They are coming up as null so is the reader right? — user8370201, Sep 03 '17 at 22:59
I was wondering if anyone else would be able to help me further — user8370201, Sep 03 '17 at 23:13
`x` and `y` are elements not attributes. I suggest you read up on XML and Linq — Richard Schneider, Sep 03 '17 at 23:19

score 0 · Answer 1 · answered Sep 03 '17 at 23:42

Here's an example that prints each point

foreach (var point in XDocument.Parse(xml).Descendants("point"))
{
    var x = Int32.Parse(point.Element("x").Value);
    var y = Int32.Parse(point.Element("y").Value);
    Console.WriteLine("({0}, {1})", x, y);
}

See the fiddle at https://dotnetfiddle.net/Yek62r

XML reader not reading properly

1 Answers1