Page History: Printing a Variable Name and Value - .NET Framework

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Page Revision: Sat, Aug 06, 2011, 10:51 AM

Code¶

static void Main(string[] args)
{
    for (int i = 0; i < 3; i++)
    {
        for (int j = 2; j < 4; j++)
        {
            Debug.Print("----------");
            Debug.Print(DebugMsg(() => i));
            Debug.Print(DebugMsg(() => j));
        }
    }
}
public static string DebugMsg<T>(Expression<Func<T>> expr)
{
    var body = expr.Body as MemberExpression;
    var name = body.Member.Name;
    var value = ((FieldInfo)body.Member).GetValue(((ConstantExpression)body.Expression).Value);
    return name + " = " + value;
}

===Output===

-- i = 0 j = 2 -- i = 0 j = 3 -- i = 1 j = 2 -- i = 1 j = 3 -- i = 2 j = 2 -- i = 2 j = 3@@