CODEWITHSUNDEEP
c#linqlinq-to-objects
roybalderama
roybalderama

Reputation: 1640

LINQ Get Properties of Class

How can I get list of properties of a object/class using linq??

public class Person  { 
public string Name   { get; set; } 
public string Age    { get; set; } 
public string Gender { get; set; } 
}

I want to {"Name","Age","Gender"}.

Upvotes: 1

Views: 5093

Answers (3)

Akanksha Gaur
Akanksha Gaur

Reputation: 2676

typeof(Person).GetProperty("Name")

You can get the individual properties using Reflection. For more details read here.

Upvotes: 0

Brett Wolfington
Brett Wolfington

Reputation: 6627

As a previous commenter mentioned, reflection is the tool you should use to acquire this information.

Following is a small example program that will retrieve and display the property names from a hypthetical "Person" class:

System.Type type = typeof(Person);
System.Reflection.PropertyInfo[] properties = type.GetProperties();

foreach (System.Reflection.PropertyInfo property in properties)
    Console.WriteLine(property.Name);

Upvotes: 3

xfx
xfx

Reputation: 1358

You will need to use reflection. Here's a function that I have used on many projects.

private List<MemberInfo> GetMembers(Type objectType, MemberTypes memberType)
{
    List<MemberInfo> members = new List<MemberInfo>();

    Assembly asm = Assembly.GetAssembly(objectType);
    foreach (Type t in asm.GetExportedTypes().Where((Type testType) => object.ReferenceEquals(testType, objectType))) {
        foreach (MemberInfo mi in t.GetMembers().Where((MemberInfo member) => member.MemberType == memberType)) {
            switch (memberType) {
                case MemberTypes.Property:
                    members.Add(mi);
                    break;
                case MemberTypes.Method:
                    bool isValid = true;

                    foreach (PropertyInfo pi in t.GetProperties()) {
                        if ((pi.CanWrite && pi.GetSetMethod().Name == mi.Name) || (pi.CanRead && pi.GetGetMethod().Name == mi.Name)) {
                            isValid = false;
                            break;
                        }
                    }


                    if (isValid)
                        members.Add(mi);
                    break;
            }
        }
    }

    return members.OrderBy((MemberInfo mi) => mi.Name).ToList();
}

To call it, you can use, for example:

var properties = GetMembers(typeof(myObject), MemberTypes.Property)

Upvotes: 1

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