WebJun 22, 2024 · How to check if an item exists in a C# list collection? Csharp Programming Server Side Programming Set a list − List < string > list1 = new List < string > () { "Lawrence", "Adams", "Pitt", "Tom" }; Now use the Contains method to check if an item exits in a list or not. if (list1.Contains("Adams") == true) { Console.WriteLine("Item … WebC# public System.Collections.Generic.List FindAll (Predicate match); Parameters match Predicate The Predicate delegate that defines the conditions of the elements to search for. Returns List A List containing all the elements that match the conditions defined by the specified predicate, if found; otherwise, an empty List.
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WebI have a problem in fetching the record from a generic list. 从通用列表中获取记录时遇到问题。 I have created a common function from where i want to get the records from any type of class. 我创建了一个通用函数，我希望从任何类型的类中获取记录。 Below is sample code:-以下是示例代码： - WebTo check if an element is present in the list, use List.Contains () method. The definition of List.Contains () method is given below. bool List.Contains (int item) If given element is present in the list, then List.Contains () returns True, else, it returns False. formation cpeons
C# First occurrence in the List that matches the specified conditions ...
WebJan 3, 2024 · Using List.FindIndex () Method This method returns the occurrence of the first element mentioned in the predicate and returns -1 if no element satisfies the condition. 4. Using List.FindAll () Method This method returns the list of all the elements which match the given specified conditions. WebSep 29, 2024 · // Create a list of strings by using a // collection initializer. var salmons = new List { "chinook", "coho", "pink", "sockeye" }; // Remove an element from the list by specifying // the object. salmons.Remove ("coho"); // Iterate through the list. foreach (var salmon in salmons) { Console.Write (salmon + " "); } // Output: chinook pink sockeye … WebOct 18, 2016 · 152. You have a few options: Using Enumerable.Where: list.Where (i => i.Property == value).FirstOrDefault (); // C# 3.0+. Using List.Find: list.Find (i => i.Property == value); // C# 3.0+ list.Find (delegate (Item i) { return i.Property == value; }); // C# … formation cpf jardinage