Question

I understand that SortedDictionary is not available in WP7…so have to sort it yourself.

I have found a number of examples and am currently using this code

Dictionary<string, TimetableClass> AllClasses = new Dictionary<string, TimetableClass>()
        {
            { "Maths", new TimetableClass {ClassName="Maths", Location="RM1"}},
            { "Physics", new TimetableClass {ClassName="Physics", Location="PM1"}},
            { "English", new TimetableClass {ClassName="English", Location="PM1"}},
            { "Algebra", new TimetableClass {ClassName="Algebra", Location="A1"}}

        };

        var sortedDict = new Dictionary<string, TimetableClass>();

        foreach (KeyValuePair<string, TimetableClass> singleclass in AllClasses.OrderBy(key => key.Value))
        {
            sortedDict.Add(singleclass.Key, singleclass.Value);
        }

But when I run this I get an exception on the foreach?

Exception is an Unhandled Argument Exception – “Value does bot fall within the expected range”

Really have no idea what I have done wrong here.
Any help appreciated.

• Thanks

Answer 1

This should work

foreach (KeyValuePair<string, TimetableClass> singleclass in AllClasses.OrderBy(item => item.Key))
        {
            sortedDict.Add(singleclass.Key, singleclass.Value);
        }

Alternately, if you want to sort based on Object(Value), try this

foreach (KeyValuePair<string, TimetableClass> singleclass in AllClasses.OrderBy(item => item.Value.ClassName))
        {
            sortedDict.Add(singleclass.Key, singleclass.Value);
        }

And finally, you can also avail this instead of a foreach loop and without the need of an extra ‘sortedDict’ dictionary.

AllClasses = AllClasses.OrderBy(item => item.Key).ToDictionary(item => item.Key, item => item.Value);