How i can dynamically get a Property through a function in c#?

Question

i have a function

public string getValue(string val)

and in this function i need to get the value from a database field:

using (UsersContext db = new UsersContext())
{
    UserProfile user = db.UserProfiles.Where(c => c.UserId == this.userId).FirstOrDefault()
    name = user.(val); ????????????
}

How i can get the custom value from the function argument? I think i need to change the argument type:

public string getValue(UserProfile val)

But how i can get the Property or Pass the Property Name?

Thank you!!! :)

Answer 1

It is generally easier and more performant of you pass in the property as a function than as a string, ie change your signature to

public string GetValue<T>(Func<UserProfile, T> property)

(Naming conventions in .NET are that methods are to be in Pascal Case.) With this, you can then call name = property(user) .

Alternatively, you can use the string to retrieve the PropertyInfo object and use this to retrieve the property value. However, this is less performant as it requires reflection.