linq-to-objects

I have the following dictionary: Dictionary<int,string> dic = new Dictionary<int,string>(); dic[1] = "A"; dic[2] = "B"; I want to filter the dictionary's items and reassign the result to the same variable: dic = dic.Where (p => p.Key == 1); How can I return the result as a dictionary from the same type [ <int,string> ] ? I tried ToDictionary , but it doesn't work. Thanks in advance. ToDictionary is the way to go. It does work - you were just using it incorrectly, presumably. Try this: dic = dic.Where(p => p.Key == 1) .ToDictionary(p => p.Key, p => p.Value); Having said that, I assume you

Please do help me out in one of the scenario, where I got stucked. It goes like this. A dynamically created List of table and List of Fields( inside Table ) using PropertyGrid. BindingList<Table> table = new BindingList<Table>(); [Serializable] [TypeConverter(typeof(TableConverter))] public class Table { private string _name = string.Empty; private HeaderCollection _hc = new HeaderCollection(); private BindingList<Fields> _fc = new BindingList<Fields>(); public Guid key; public Table() { key = Guid.NewGuid(); } [DisplayName( "Table Fields" ), Editor( typeof( FieldCollectionEditor ), typeof(

I was trying out a simple OrderBy statement. The target data to order is something like below: [ {"id":40, "description":"aaa", "rate":1}, {"id":1, "description":"bbb", "rate":1}, {"id":4, "description":"ccc", "rate":2}, {"id":19, "description":"aaa", "rate":1} ] Then I order items by the rate property. The odd thing is that if I 'order' them, it 'skips' some items by a given offset and then 'take' only portion of the data. For example, var result = items.OrderBy(i => i.rate); var result = result.Skip(2); var result = result.Take(2); The result looks fine for the most of it, but the 'edge case

Say I have an (ordered) sequence of animals: Eagle Elephant Tarantula Terrapin Tiger and I group by first letter: Animals.GroupBy(animal => animal.First()) will the elements of the IGrouping s in the resulting sequence be in the same order as the input sequence? Yes, they will be: GroupBy (MSDN) . The IGrouping<TKey, TElement> objects are yielded in an order based on the order of the elements in source that produced the first key of each IGrouping<TKey, TElement>. Elements in a grouping are yielded in the order they appear in source. Quote from the MSDN page for GroupBy: The IGrouping<TKey,

I'm trying to "share" a set of conditions between a Linq to Entities call and a some other code, to reduce possible mismatches in conditions between the two calls. I started off by declaring my conditions: private Func<DateTime, Status, bool> _submissionDateExpiredCondition = (submissionDate, status) => submissionDate < DateTime.Now && status == Status.OK; private Func<DateTime, Status, bool> _submissionDateWithinOneWeekCondition = (submissionDate, status) => DateTime.Now < DbFunctions.AddDays(submissionDate, -7) && status == Status.Pending; private Func<DateTime?, Status, bool>

please I need your help with a Linq expression: I have nested objects with lists, this is how the main object hierarchy looks like (each dash is an atribute of the sub-class): Folder -name -List<Subfolder> Subfolders -name -List<Document> Documents -name -key Having this hierarchy of objects, I have a Document name, and I want to search for it and return its parent folder (Subfolder) Example: Folder -name: Customer -List<Subfolder> Subfolders -name: Personal -List<Document> Documents -name: Resume -key : 1 If I said: "Resume", the linq expression should return me: the subfolder "Personal" (the