Click here to Skip to main content
12,820,097 members (24,890 online)
Click here to Skip to main content
Add your own
alternative version

Tagged as

Stats

29.8K views
9 bookmarked
Posted 2 Sep 2011

Useful wrapper class to override the Object.ToString method

, 3 Oct 2011 CPOL
Rate this:
Please Sign up or sign in to vote.
A useful wrapper class to override the Object.ToString method.

This class can be useful for when you want to override the Object.ToString method on a type you don't have access to edit.


public class ToStringWrapper<T>
{
    private readonly T _wrappedObject;
    private readonly Func<T, string> _toStringFunction;

    public T WrappedObject
    {
        get { return _wrappedObject; }
    }

    public ToStringWrapper(T wrappedObject, Func<T, string> toStringFunction)
    {
        this._wrappedObject = wrappedObject;
        this._toStringFunction = toStringFunction;
    }

    public override string ToString()
    {
        return _toStringFunction(_wrappedObject);
    }
}


Sample usage: Don't have access to edit the Person type and you want the Name property's value to be returned in the ToString method.



public sealed class Person
{
    public string Name { get; set; }
}

class Program
{
    static void Main(string[] args)
    {
        // Person type not wrapped.  Type will be returned in ToString method
        var person = new Person { Name = "TestName" };
        Console.WriteLine(person);

        // Person type wrapped with ToStringWrapper<T> class and supplying
        // a function that will return the Person class's Name property value.
        var personWrapper = new ToStringWrapper<Person>(person, i => i.Name);
        Console.WriteLine(personWrapper);

        Console.ReadKey();
    }
}


Output:
ConsoleApplication1.Person
TestName

License

This article, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

Share

About the Author

Jay_Cee
South Africa South Africa
No Biography provided

You may also be interested in...

Pro
Pro

Comments and Discussions

 
GeneralReason for my vote of 5 Also usefull in the debugger :) Pin
Eddy Vluggen13-Sep-11 14:14
memberEddy Vluggen13-Sep-11 14:14 
GeneralRe: I think DebuggerDisplay and DebuggerTypeProxy attributes are... Pin
moozzyk10-Oct-11 20:57
membermoozzyk10-Oct-11 20:57 
GeneralReason for my vote of 5 Nice Pin
Shahare12-Sep-11 20:32
memberShahare12-Sep-11 20:32 
GeneralI concur the idea is nice. I find Edward Nutting's comment v... Pin
Ilka Guigova5-Sep-11 17:05
memberIlka Guigova5-Sep-11 17:05 
GeneralI would say that instead of having to create a new ToStringW... Pin
Edward Nutting4-Sep-11 6:31
memberEdward Nutting4-Sep-11 6:31 
Generalyou appear to be missing a <T> from your class declaration a... Pin
GParkings2-Sep-11 12:50
memberGParkings2-Sep-11 12:50 
GeneralRe: Thanks, had some formatting issues which should be fixed now... Pin
Jay_Cee4-Sep-11 23:02
memberJay_Cee4-Sep-11 23:02 
Thanks, had some formatting issues which should be fixed now.

General General    News News    Suggestion Suggestion    Question Question    Bug Bug    Answer Answer    Joke Joke    Praise Praise    Rant Rant    Admin Admin   

Use Ctrl+Left/Right to switch messages, Ctrl+Up/Down to switch threads, Ctrl+Shift+Left/Right to switch pages.

Permalink | Advertise | Privacy | Terms of Use | Mobile
Web02 | 2.8.170308.1 | Last Updated 3 Oct 2011
Article Copyright 2011 by Jay_Cee
Everything else Copyright © CodeProject, 1999-2017
Layout: fixed | fluid