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3 paź 2014 · You can use the ElementAt extension method on the list. For example: // Get the first item from the list using System.Linq; var myList = new List<string> { "Yes", "No", "Maybe"}; var firstItem = myList.ElementAt (0); // Do something with firstItem. edited May 20, 2018 at 1:23.
The first element in a collection is generally located at index 0. The last element is at index n-1, where n is the Size of the collection (the number of elements it contains). If you attempt to use a negative number as an index, or a number that is larger than Size-1, you're going to get an error.
C# provides two solid ways to access the data by the index. The indexer and the ElementAt function. They work in similar ways but the indexer only works on certain IEnumerable types ElementAt will work on any IEnumerable type which includes a list.
Instead of handling the exception, you should diagnose the cause of the error and correct your code. The most common causes of the error are: Forgetting that the upper bound of a collection or a zero-based array is one less than its number of members or elements, as the following example illustrates.
7 lip 2015 · There is no SQL equivalent (at least a simple way) to get this. Adding the .ToList() you are forcing an immediate execution of the query and bring the results into memory, specifically into a List object. This has a nice easy way to access the data via an index.
23 sie 2024 · Declaring an indexer will automatically generate a property named Item on the object. The Item property is not directly accessible from the instance member access expression. Additionally, if you add your own Item property to an object with an indexer, you'll get a CS0102 compiler error.
Examples. C# get items from List: List<int> numbers = new List<int> { 1, 2, 3, 4, 5 }; int specificNumber = numbers [2]; // Retrieves the item at index 2. Retrieve elements from List in C#: List<string> colors = new List<string> { "Red", "Green", "Blue" }; string firstColor = colors [0]; // Retrieves the first item in the list.
