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Posted 2 Sep 2011

Useful wrapper class to override the Object.ToString method

, 3 Oct 2011
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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" };

        // 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);




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


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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 
I think DebuggerDisplay and DebuggerTypeProxy attributes are better suited to display object information in the debugger
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 

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