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i have three functions which are returning an IEnumerable collection. now i want to combine all these into one List. so, is there any method by which i can append items from IEnumerable to a list. i mean without for each loop?
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What you can do is use the Add extension method to create a new IEnumerable<T> with the added value. var items = new string[]{"foo"}; var temp = items; items = items. Add("bar");
Unfortunately, List<T>. AddRange isn't defined in any interface.
Clear() will empty out an existing IEnumerable. model. Categories = new IEnumerable<whatever>() will create a new empty one. It may not be a nullable type - that would explain why it can't be set to null.
IEnumerable in C# is an interface that defines one method, GetEnumerator which returns an IEnumerator interface. This allows readonly access to a collection then a collection that implements IEnumerable can be used with a for-each statement.
Well, something will have to loop... but in LINQ you could easily use the Concat and ToList extension methods:
var bigList = list1.Concat(list2).Concat(list3).ToList(); Note that this will create a new list rather than appending items to an existing list. If you want to add them to an existing list, List<T>.AddRange is probably what you're after:
bigList.AddRange(list1); bigList.AddRange(list2); bigList.AddRange(list3); If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
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