WebIn you controller you are declaring ViewData as ViewData["MembershipId"] and in view you are using ViewData["items"] that is wrong . Make sure that the key of you ViewData is … WebOct 18, 2024 · Parameter: index: It is the zero-based index at which the new elements should be inserted. collection: It is the collection whose elements will be inserted into the List. Note: The collection itself cannot be null. But it can contain elements which can be null if the type T is a reference type.
Object and Collection Initializers - C# Programming Guide
WebFor the non-generic version of this interface, see System.Collections.IEnumerable. IEnumerable contains a single method that you must implement when implementing … WebMar 21, 2024 · Info We use IEnumerable and the foreach-loop to access, in sequence, all items in a 2D array. We can abstract the loop itself out. Here This example shows the yield contextual keyword in a method that returns IEnumerable. Return The return value is a generic IEnumerable collection of ints. chomper pvz 2
C# Tip: use yield return to return one item at the time
WebIf You Use First(), You Need to Sort. If you applied step 1C in your decision-making process, now you need to think about how your collection is sorted. After all, if the order of your items is practically random, the result you get from using .First() will also be random.Most of the time, I’d consider getting a random item from a collection to be a rather useless operation. WebSep 29, 2024 · See also. An iterator can be used to step through collections such as lists and arrays. An iterator method or get accessor performs a custom iteration over a collection. An iterator method uses the yield return statement to return each element one at a time. When a yield return statement is reached, the current location in code is remembered. WebSystem.InvalidOperationException: 'There is no ViewData item of type 'IEnumerable' that has the key 'Meal_Plan'.' System.InvalidOperationException HResult=0x80131509 Message=There is no ViewData item of type 'IEnumerable' that has the key 'Meal_Plan'. chomp er phone number