在C＃中使用Lambda表达式获取对象属性为字符串

Question

Suppose I have this class:

class MyClass {
  public int MyProperty { get; set; }
}

And I want to get the MyProperty as string (eg "MyProperty") but through lambda expression or any other way that is "refactoring-friendly".

Is there a syntax that is something like this:

void BindToDataSource(IEnumerable<MyClass> list) {
    myComboBox.DataSource = list;
    myComboBox.DisplayMember = typeof(MyClass).GetPropertyToString(c => c.MyProperty);
}

I dont want to this code:

myComboBox.DisplayMember = "MyProperty"

because it is not "refactoring-friendly".

Answer 1

Take a look at the answer to this: Workaround for lack of 'nameof' operator in C# for type-safe databinding?

In your case, if you implement this Generic Class:

public class Nameof<T>
{
    public static string Property<TProp>(Expression<Func<T, TProp>> expression)
    {
        var body = expression.Body as MemberExpression;

        if(body == null)
            throw new ArgumentException("'expression' should be a member expression");

        return body.Member.Name;
    }
}

You can use it like this:

void BindToDataSource(IEnumerable<MyClass> list) 
{
    myComboBox.DataSource = list;
    myComboBox.DisplayMember = Nameof<MyClass>.Property(e => e.MyProperty);
}