C#

This article mainly introduces C # to determine the existence of folders and create a folder method, involving C # for the file and directory of the judgment and creation of operations related skills, the need for friends can refer to the following

This article mainly describes the C # special string type. Have a good reference value, follow the small series together to see it 1. Preface String is a reference type, does everybody know? But in the process of use, it is found that it still has

Page Pass Valueis to learn the early days of the ASP will face a problem, in general, page transfer value, storage object value, Ajax, class, model, form, and so on. But generally speaking, it is simpler to use

Reflections and properties The. NET Framework provides reflection and feature technology that can be used to check data repeatability to determine whether a piece of data is written to a database table. Demand When an entity writes a data to a

First look at the code: int a = 1; int b = A; A = 2; BOOL Valorref = b = = 2 ;//false; You can see that the int type is a value type because b does not follow a change. Then look at the

C # Tool Classes--generic methods for type conversions Using system;using system.collections.generic;using system.linq;using system.text;using System.Data;namespace Linqpractice{class Utility {public static T convertdatarow (DataRow dr, string

Consider a scenario where you need to schedule a task (for example, to go to a remote server fetch data, periodically update a field of the database, etc.), for such a business, c# also did the encapsulation, can help us to complete

C # thread synchronization with the thread pool The example is simple and prepares 5 threads, each of which outputs a number to the console, and then observes the output. Code Description: Thread List private static list _threadlist;

When logging, it is sometimes necessary to know the value of each field of an entity, when it is necessary to iterate through the members with reflection, to spell the string back, and if the member is still a custom type, recursive execution is

Sometimes, when the task is more, a queue needs to be made. When the number of queues reaches a certain number of times, the team will be out and processed, but if it has not reached that number for a long time? Then add a time limit, such as 30

wrap up the things that create objects Using system;using system.collections.generic;using system.linq;using system.text;namespace DesignPytternDemo{//& Lt;summary>///Simple factory/// public interface Ifood {int. price {get;} } public

let the abstraction and the realization Independent change Public abstract class Game {public game (string name) {this. name = name; Public Play M_play {get; set;} public string Name {get; set;} public virtual void Playforfun ()

Sample code Introduction to C # Access database operations Using system;using system.collections.generic;using system.linq;using system.text;using System.Data;using System.data.oledb;namespace accesspractice{public static class Accesshelper {public

Summary of values between C # forms 1. The parent form passes the value to the subform Write in the parent form: Formchild FC = new Formchil ();//Create a new sub-form FC. ShowDialog (this);//The connection between the subform and the parent form is

C # hides open windows, opens a detailed introduction to the login window FormCollection FC = application.openforms;//Gets the open window//loop hidden if (FC! = NULL && FC. Count > 0) { foreach (Form window

Resolution of the value of the substring () method in four languages, four types of substring 1. About substring (a, B)JsVar str = "bdqn ";Var result = str. substring (1, 2 );Alert (result ); First parameter: Start position, starting from 0 The

How does Lucene. Net implement the classification and statistics function of search results? Recently, a customer of the search system in souyi station needs an infinitely classified and classified statistics function. The following results are

What do you know about Dapper extensions ?, Dapper extension? In my previous ORM comparison article, after I chose Dapper as the underlying ADO basic access framework, I conducted further in-depth research on it, I found that some useful extension

08. C # System. Nulable and null reference operators (Chapter 4 4.2-4.4 ), After reading these three sections, I found that the author was too detailed and told me how to use one of them normally. I don't know how to understand the author's

C # parameters of series articles, Main problems solved: Main content of the article: Optional and named Parameters Implicit local variables PASS Parameters to methods by reference Passing a variable number of parameters to a method Design