Howdy, I need to set the height of every textbox on my form, some of which are nested within other controls. I thought I could do something like this: private static IEnumerator<TextBox> FindTextBoxes(Control rootControl){ foreach (Control control in rootControl.Controls) { if (control.Controls.Count > 0) { ...
I noticed that generic IEnumerator(of T) inherits from IDisposable, but the non-generic interface IEnumerator does NOT. Why it is designed in this way? Usually, we use foreach statement to go through a IEnumerator(of T) instance. The generated code of foreach actually has try-finally block that invokes Dispose() in finally. Edit: My m...
I just want to verify, is yield return a shortcut for implementing IEnumerable and IEnumerator? Thanks, John ...
Is there a way to use yield blocks to implement an IEnumerator<T> which can go backward (MoveLast()) as well as forward? ...
When I emplement IEnumerable<T> interface I see two GetEnumerator methods: one returning IEnumerator and other IEnumerator<T>. When would I use one or another? ...
What are the differences between IEnumerator and IEnumerable? ...
I am writing a custom ConfigurationElementCollection for a custom ConfigurationHandler in C#.NET 3.5 and I am wanting to expose the IEnumerator as a generic IEnumerator. What would be the best way to achieve this? I am currently using the code: public new IEnumerator<GenericObject> GetEnumerator() { var list = new List(); var bas...
I was curious to see how the SingleOrFallback method was implemented in MoreLinq and discovered something I hadn't seen before: public static T SingleOrFallback<T>(this IEnumerable<T> source, Func<T> fallback) { source.ThrowIfNull("source"); fallback.ThrowIfNull("fallback"); using (IEnumerator<T> iterator...
In C#, how does one obtain a generic enumerator from a given array? In the code below, MyArray is an array of MyType objects. I'd like to obtain MyIEnumerator in the fashion shown, but it seems that I obtain an empty enumerator (although I've confirmed that MyArray.Length > 0). MyType [ ] MyArray = ... ; IEnumerator<MyType> MyIEnu...
With Java Iterators, I have used the hasNext method to determine whether an iteration has more elements (without consuming an element) -- thus, hasNext is like a "Peek" method. My question: is there anything like a "hasNext" or "Peek" method with C#'s generic IEnumerators? ...
I have the following code. MyDataContext db = MyDataContext.Create(); bc = db.BenefitCodes.Select( b => new { BenCd = b.BenCd , Description = b.BenDesc , BenInter...
I am new to enumerating collections so forgive if this question sounds silly. I have an class public class PersonStuff : IPersonStuff, IEnumerable<User> { Person person = new Person(); ... IEnumerator<Person> IEnumerable<Person>.GetEnumerator() { return (person as IEnumerable<Person>).Ge...
I'd like to know if I can assume that the IEnumerator I get from an IList (by calling the GetEnumerator method from the IEnumerable interface) will give me the items in the order of the list. What do you think? ...
Say I have a class that implements IEnumerable<T>. It currently uses the yield keyword in the GetEnumerator() method. But now I need to do a bit more, for example I would like to clean up after myself. To do this, unless I have overlooked anything, I need to implement the IEnumerator<T> interface. But where would you say I should do that...
Hi I am using Aspose cells to manipulate Excel spreadsheets. One of the types in the API is a collection of Pictures in the spreadsheet, which derives from CollectionBase: see this link: http://www.aspose.com/documentation/.net-components/aspose.cells-for-.net/aspose.cells.pictures.html I want to convert this type to something that al...
Let's say I want to create a collection class that is thread-safe by default. Internally, the class has a protected List<T> property called Values. For starters, it makes sense to have the class implement ICollection<T>. Some of this interface's members are quite easy to implement; for example, Count returns this.Values.Count. But imp...
It's been asked a couple of times on SO how you can implement a bidirectional enumerator (http://stackoverflow.com/questions/191788/two-directional-list-enumerator-in-net, http://stackoverflow.com/questions/451099/implementing-a-bidirectional-enumerator-in-c). My question is not how (which is trivial for most cases), but why no such type...
Hi there I have an iEnumerator object. I would like to access based on index for instance: for(i=0; i<=Model.Products; i++) { ??? } Is this possible? ...
Hello! I have an interface that, among other things, implements a "public IEnumerator GetEnumerator()" method, so I can use the interface in a foreach statement. I implement this interface in several classes and in one of them, I want to return an empty IEnumerator. Right now I do this the following way: public IEnumerator GetEnumerat...
I'm trying to optimize a concurrent collection that tries to minimize lock contention for reads. First pass was using a linked list, which allowed me to only lock on writes while many simultaneous reads could continue unblocked. This used a custom IEnumerator to yield the next link value. Once i started comparing iteration over the colle...