使用LINQ向带有Dictionary属性的对象属性添加值

Question

I have a dataset which returns a couple of contact information in string(Phone, mobile, skype) . I created an object with a Dictionary property where i can put the contact information in a key value pair. The problem is, I am assigning the values of the object using Linq. Hope somebody can help. Here is my code:

public class Student
    {
        public Student()
        {
            MotherContacts = new ContactDetail();
            FatherContacts = new ContactDetail();
        }
        public ContactDetail MotherContacts { get; set; }
        public ContactDetail FatherContacts { get; set; }
    }

public class ContactDetail
{
    public ContactDetail()
    {
        Items = new Dictionary<ContactDetailType, string>();
    }
    public IDictionary<ContactDetailType, string> Items { get; set; }

    public void Add(ContactDetailType type, string value)
    {
        if(!string.IsNullOrEmpty(value))
        {
            Items.Add(type, value);
        }
    }
}

public enum ContactDetailType
{
    PHONE,
    MOBILE
}

Here's how I assign value to the Student object:

    var result = ds.Tables[0].AsEnumerable();
    var insuranceCard = result.Select(row => new Student()
        {
             MotherContacts.Items.Add(ContactDetailType.PHONE, row.Field<string>("MotherPhone"),
             MotherContacts.Items.Add(ContactDetailType.MOBILE, row.Field<string>("MotherMobile")
        }).FirstOrDefault();

The compiler says that the MotherContacts is not recognized in the context. What should I do?

Answer 1

I think your code should look like:

var insuranceCard = result.Select(row => 
{ 
     var s = new Student();
     s.MotherContacts.Items.Add(ContactDetailType.PHONE, row.Field<string>("MotherPhone");
     s.MotherContacts.Items.Add(ContactDetailType.MOBILE, row.Field<string>("MotherMobile");
     return s;
}).FirstOrDefault();

You are using the object initializer syntax in a wrong way. The correct use is:

new Student{MotherContacts = value} where value must be a ContactDetail .