C＃-将匿名类型解析为int32

Question

I'm having problems when trying to parse values that I retrieve from an XML-file. I get several values stored toList() in a variable var and I want to convert them to Int32 and summarize them. Here is the method I am using:

public void ViktTjurar()
{
    string år = TextBoxÅr.Text;
    int test= 0;
    int summa = 0;
    XElement vikt =  XElement.Load(path);


    var vikttjurar = (from h in vikt.Descendants("älgrapport")
                      where (string)h.Element("år") == år && (string)
                      h.Element("typ") == "Tjur"
                      select new
                      {
                          tvikt = int.Parse(h.Element("Vikt").Value),

                      }).ToList();

    //List<int> vikter1 = new List<int>();
    foreach (var e in vikttjurar)
    {
        test = Convert.ToInt32(e);                             
    }
} 

At the moment I get 3 values from the XML-file, stored in var vikttjurar and I thought I parsed them correctly with: tvikt = int.Parse(h.Element("Vikt").Value) .

It seems it doesn't work. When assigning the value of e to test (in a foreach loop) I get error saying:

Cannot implicitly convert type 'AnonymousType#1' to 'int'

So I tried to Convert e to Int32 (as you can see in my code above) but that wont work either and I get the same error: System.InvalidCastException .

Does anyone know how to solve the parsing from anonymous type to int or, even better, parse AND summarize the values in var vikttjurar ?

Answer 1

You've already done the conversion in your linq statement, and created anonymous objects with a single property, tvikt . Now you just need to look it up:

    foreach (var e in vikttjurar)
    {

        test = e.tvikt;

    }

BTW, the XElement type supports explicit conversion to Int32 (or int ), so in your Linq statement, you can:

...select new
{
    tvikt = (int)h.Element("Vikt"),

}...

Answer 2

Just do this, you have the int parsed already:

test = e.tvikt;

Also, you could simplify your whole code a bit:

var vikttjurar = (from h in vikt.Descendants("älgrapport")
                  where (string)h.Element("år") == år && (string)
                  h.Element("typ") == "Tjur"
                  select int.Parse(h.Element("Vikt").Value))
                 .ToList();

//List<int> vikter1 = new List<int>();
foreach (var e in vikttjurar)
{
    test = e; // e is an int here
}