throw new notimplementedexception

Sometimes we might want to add a sequence number before the ListBox list item, so that it looks clearer and can be used with shortcut keys and so on.Want to achieve the effect as follows:Obviously we can do this by modifying the template for the

The form passing value is a kind of common problem that comes into being when learning form application, and now the method of the form passing value is summarized, the method is as follows: declaring global variable values:Declare the global

Stored ProceduresStored procedures exist in any relational database, such as Microsoft's SQL Server. A stored procedure is some code that is contained in a database, usually performing some operations on the data, which can improve performance for

Iterator: Enumerator If you are creating a class that behaves and behaves like a collection, it is convenient to allow users of the class to enumerate the members of the collection using the foreach statement. We'll start by creating a simplistic

Using system;using system.collections.generic;using system.data;using system.linq;using System.Text;using System.reflection;namespace extension{public static class Extension {public static ilist Tolist&lt ; T> (this DataTable dt) {var lst

Tip 29. How to avoid lazy loading or load () reader issuesIf you have the following code:1 var results = from C in CTX. Customers 2 where c.salesperson.emailaddress = = "..." 3 Select C; 4 foreach (var

Here we will extend the JSON from the Javascript syntax, and then introduce how to apply Program Use JSON. As you know in Javascript, there is an arrays: array. The format is as follows: CopyCode The Code is as follows: var Beatles = ["PAUL",

When writing a user-defined function, a function should not exceed two screens. Note the. NET Framework version when creating a project.1. Change the framework version-you can change the framework version when you need to use a specified version to

  Asynchronous programming in ASP. NET Why use asynchronous programming in ASP. NET? ASP. NET uses threads in the Common Language Runtime Library (CLR) thread pool to process requests. As long as there are available threads in the thread pool,

Public class ihttpasynchandlerdemo: ihttphandler, ihttpasynchandler {public void processrequest (httpcontext context) {context. response. contenttype = "text/plain"; context. response. write ("Hello World");} public bool isreusable {get {return

C # reference for ActiveX control development: Http://www.cnblogs.com/zhf/archive/2009/03/02/1401299.html Http://www.cnblogs.com/homer/archive/2005/01/08/88780.html   C # For details about ActiveX development, see the above two articles. 1. to

I. Example of delegated implementation: // Define a delegate Type public delegate void DoSthDelegate1 ();////// Apple mp3 player ///Class iPod {// define a delegate variable in the iPod class public DoSthDelegate1 userDo; public void PlayMusic ()

How does Json. Net modify attribute values before serialization?We all know the use of Json.net sequence words Test = new test () {A = "123", B = DateTime. now, C = DateTime. now. addDays (1)}; string json = JsonConvert. serializeObject (test); you

I just reviewed the sort () method of the Array class. Here I will list some common ones and share them with you.   The Array class implements the Bubble Sorting of elements in the Array. The Sort () method requires that the elements in the array

From today on, I will share the content in this book with you every day, and add my own understanding, hoping to help more blind programmers like me. Today, let's talk about object copy in C #. The so-called object copy is actually creating a copy

1. Ways to extend IenumerableThe Mys method is used to inherit the Ienumeralbe interface. static class MySum {Must be a static class public static int Mys(this IEnumerable value) { // 必须是静态方法 int sum = 0; var ie =

Serialization | Iot framework ServerSuperIO tutorial-15. Use of the data persistence interface. Appendix: Release and version update instructions ., Serversuperio 1. C # Introduction to cross-platform Iot communication framework ServerSuperIO (SSIO)

Wait until all or any asynchronous tasks are completed, and the processing scheme for asynchronous tasks to be completed.   This article describes how to wait for all asynchronous tasks to complete, wait for any asynchronous task to complete, and

Xamarin Android binding SDK, xamarinandroid Almost all apps are now integrated with Weibo and other functions shared by social platforms. These social platforms also provide sdks for developers. for Android and IOS platforms, you only need to

JSON. NET simple instructions, json.net simple instructions NewtonJson is a commonly used json Parsing Library. Basically, this library is used in my project. It also has related libraries in Unity, which ensures the unification of multiple projects.