获取IList中的项目值？

Question

Is there any way to get the values of items in the IList? It goes like this:

Assume we have an IList list and a method private IList getValues(int ID)

then we initialize IList list like:

IList list = getValues(SelectedID)

After the processing, IList list now contains 2 elements, each with it's own collection:

[0]
 {
   GroupName = "test01"
   GroupID = 1
 }

[1]
 {
   GroupName = "test02"
   GroupID = 2
 }

How will I get the GroupName of the first element? I can't just call it like list[0].GroupName , can I?

Answer 1

If you know the type of the object, you can use this to get what you want.

list.Cast<Group>().ElementAt(0).GroupName

Group as in your object name.

Answer 2

Try the following, you need to create a list with your custom object. I created a dummy class here named CustomClass, and creating a list with the known type.

public class CustomClass
    {
        public string GroupName { get; set; }
        public int GroupID { get; set; }
    }

    protected void Page_Load(object sender, EventArgs e)
    {
        List<CustomClass> list = new List<CustomClass>();
        foreach (var x in list) {
            Console.WriteLine(x.GroupName);
        }

    }

Answer 3

You can use FindIndex method, example

class MyClass2
{
    public string Name { get; set; }
    public int Age { get; set; }
    public int Type { get; set; }
}


    List<MyClass2> myLists = new List<MyClass2>();
    myLists.Add(new MyClass2() { Age = 1, Name = "Mast", Type = 560 });
    myLists.Add(new MyClass2() { Age = 2, Name = "Oli", Type = 778 });
    myLists.Add(new MyClass2() { Age = 3, Name = "AS", Type = 9458 });
    myLists.Add(new MyClass2() { Age = 4, Name = "ABC", Type = 100 });

    int result1 = myLists.FindIndex(T => T.Type == 9458); //2
    int result2 = myLists.FindIndex(T => T.Name == "Oli"); //1

please refer http://msdn.microsoft.com/en-us/library/x1xzf2ca.aspx