what generic collection

In a form control, there is a list control (ASP. NET) and a ListView control (WinForm).Take the ListView as an example, the ListView control can contain many items, or it can be said to be a collection, let's look at its Items property!

Recommendation 35: Use default to specify an initial value for a generic type variableSome algorithms, such as the Find algorithm for generic collection list, may be looking for a value type, or possibly a reference type. Within this algorithm, we

Recommendation 81: Use parallel to simplify the use of tasks in a synchronous stateIn namespace System.Threading.Tasks, there is a static class parallel that simplifies the operation of tasks in the synchronized state. Parallel mainly provides 3

Private voidButton1_Click (Objectsender, EventArgs e)//here is the case without a generic collection, using a DataTable{SqlConnection conn=NewSqlConnection ("server=.; Database=cml;user=sa;pwd=123"); SqlCommand cmd=Conn. CreateCommand ();

Multiple formsThe so-called multi-form is what we're talking about. After you open a form, open another form from this form, and open the form to open only one, and then move the focus into the new open form when you click again1. First we define a

"Focus" generics: with generics, you can create classes and methods that are independent of the containing type. We don't have to write many methods and classes of the same functionality for different types, just create a method or class, and here

One, the blank question1. The object-oriented language has (inheritance), (encapsulation), (polymorphism).2. Objects that can be accessed with a foreach traversal need to implement the (IEnumerable) interface or the type of the Declaration

Under the mscorlib assembly System.Collections Public Interface ICollection: IEnumerablepublic interfaceIComparerpublic interfaceIDictionary: ICollection, IEnumerablepublic interfaceIDictionaryEnumerator: Ienumerato Public Interface

The size of the array is fixed. If the number of elements is dynamic, the collection class is used.List is a collection class that is equivalent to an array. Other collections: Queues, stacks, lists, dictionaries, and sets. The. NET Framework 1

SummaryI'm sure a lot of people are more familiar with this. This error occurs when you manipulate a collection that has already been modified.SolutionsFor example, with the following section of code, we create a collection and add 10 numbers to the

protected stringGetMessage () {//how to construct and initialize an array and two classes in a generic collection library. Product myproduct =NewProduct{productid= -, name="Kayak", Description ="A boat for one person",

1. Client method// the method that belongs to the client // to the URL post Public void Postresponse () { = (HttpWebRequest) httpwebrequest.create ("http://demo2.cm-force.com/appapi/ Apiaccount/aa"); // This is the URL

then , in-depth understanding of generics in C # (i), this article focuses on generic classes, generic methods, generics, and collections. generic classif we want to have uniform parameter constraints on all generic methods of a class, we add the

Observable collectionYou can use the observablecollection class If you want the elements in the collection to verify the information that is deleted or added .The Observablecollection class represents a dynamic collection of data, when items are

1. The collection wants to support the foreach traversal, need to return an iterator (IEnumerator), and foreach will automatically invoke the iterator's State Migration (MoveNext (), curent, Reset ())#regionAssembly mscorlib.dll,

The use of ArrayList is compared with that of List . You can compile a short program to demonstrate the limitations of non-generic collection classes. This program uses the ArrayList collection class in the. NET Framework base class

Primitive type, reference type and value type, reference 1. primitive type Some data types are often used in code writing, such as int and string. For example, we define an integer below: int a =0； We can also define it in the following

C # basics 04, Introduction: Generic introduction, index, Foreach traversal explanation, yield method, path file operations, basic Directory Operations I. Generic Baidu data: Generic is a new function in the C # language and Common Language

. NET Platform for many applications (desktop development, web development, mobile development), and constantly new programming enthusiasts to start learning or transfer from other platforms. NET Development platform: NET development platform by

In the KTV song system we get to the singer's song information according to demand, click the singer's song to add it to a little song list of seemingly simple operation actually involves a lot of content, this is also the purpose of writing this