C#

When I used the WinForm program to call the Excel COM component, I also encountered the Excel process exit problem. Many people have encountered this problem, and the solution is also very hot. To sum up, the first method is to call the relevant

Events are an important part of C #. There is a demo of custom events on MSDN. After reading it for a long time, I was a little dizzy. So I created a new winform project and added a button to find the program to be called. I made a similar

For applications, you may need to determine whether a file has been opened or not. This is especially important in programs that frequently read and write files, because a file can only have one stream connection at a time. The following code may be

I have read many blogs and articles on how to understand override and new in C # and learned a lot about inheritance and polymorphism. However, the understanding layer is not deep enough and does not fall into the essence. However, objects and

Not to mention nonsense, go directly to the Code: [csharp] // TianGan private static string [] TianGan = {"A", "B", "C", "ding ", "E", "Ji", "Geng", "Xin", "Qu", "Xi"}; // private static string [] DiZhi = {"sub ", "ugly", "Yin", "Mao", "Chen", "Si",

I have also checked the three-layer concept and read it. Below is a simple example of the three-layer architecture. Let's take a look at how it is implemented. let's take a look at the Entity class-Model essence: the entity class is to complete the

Custom Object User, which sorts the List set by age. [Csharp] public class User {public User (int age, string name) {Age = age; Name = name;} public int Age {get; set ;} public string Name {get; set ;}} here we need a custom comparator [csharp]

In network communication, data acquisition is sometimes not based on your ideas. Every time you get a complete data frame, you get a broken frame, A complete frame can be obtained in several segments, or several complete frames can be obtained at a

1. sqlite does not have the built-in function of ToUpper. It doesn't matter. We can create it; 2. sqlite cannot directly create user-defined functions. It cannot be easily created and used as in SQL server. It doesn't matter. We can still create it.

1. Set the linked list. The common code is as follows:Public struct Links{Public int data;Public Links next;}The preceding code compilation error occurs: "Links. next", a structure member of the "Links" type, leads to loops in the structure

Overall Thinking: 1. First, you must apply for a public account on the public platform. 2. Simulate login. (Because I do not know the http Transmission Principle and programming very well, I am not very clear about the simulated login. I hope you

Using System;Using System. Collections. Generic;Using System. Configuration;Using System. Net;Using System. Net. Sockets;Using System. Text;Using System. Threading; Namespace LcSoftCard. Service{Public class UDPConsumeServiceDS{Private bool

The object pool service reduces the system overhead of creating each object from scratch. When an object is activated, it is extracted from the pool. When the object is disabled, it is put back into the pool and waits for the next request.Let's take

/// /// obtain the installation information of the SOFTWARE in the registry. // The SOFTWARE will enter its own installation information in the registry. // HKEY_LOCAL_MACHINE \ SOFTWARE \ Microsoft \ Windows \ CurrentVersion \ App Paths /// ///

Recently I made a collection page flip Little stuff, using c # To write, the function is relatively simple, mainly is to do a collection page flip effect, THIS IS THE IMPLEMENTATION OF THE datagrid page flip, datatgrid uses post for submission,

Net framework 4.0 adds support for optional parameters. In fact, it is very easy to assign a default value to the parameter. As follows: [Csharp]Static string GetStr (string s = "a", int I = 10, string r = "rrrr "){Return s + I + r;} Static string

Using System;Using System. Collections. Generic;Using System. ComponentModel;Using System. Data;Using System. Drawing;Using System. Linq;Using System. Text;Using System. Windows. Forms;Using System. Runtime. InteropServices;Using System.

1. C # basic learning notes 3---C # string (escape characters are irrelevant to memory storage)A. Note that "a" is a string.'A' is a characterB. The Escape Character is only applicable to strings in the program. This problem does not occur for

Using System;Using System. Collections. Generic;Using System. Linq;Using System. Text;Using System. Xml;Using System. Windows. Forms; Namespace SZTMinorTool{/// /// App. config configuration class/// Public class AppSettings{/// /// Obtain the path

5 tips for optimizing C # code performance 1. Have you used an exception mechanism to handle user input verification? If yes, your program performance has been reduced by 62 times. Don't you believe it? Wait a few minutes and I will tell you what's