C # Connection Database

/* /*Try { string constr = "Data source=user-20170228gj\\sqlexpress;initial catalog=db_zrmex;user=sa;pwd=123;"; /Database Connection field SqlConnection conn = new SqlConnection (CONSTR);

Question 1011:c Language Programming tutorial (third Edition) after class exercise 6.1

/******************************************************************** @file main.cpp@date 2017-5-10@author Zoro _tiger@brief Problem 1011:c Language Programming Tutorial (third Edition) after class exercise

C language Use VI writing C language

1. First enter the shell command interface, enter: "VI hello.c"entered the vi editing interface, type I into the editing state. The following procedures can be entered:#include int main (void){printf ("Hello, world\n");return 0;}Press ESC to exit

A section of the metaphysical code in the C + + queues queue

Code: Mtx.lock (); printf ("node%d push localw Prepared,and local flag=%d, Clock=%d\n ", Procid,localw.getflag (), Localw.getclock ()); printf ("Localq is empty:%s\n", Localq.empty ()? " True ":" false ");

C + + Wisdom Note (3): string copy function Technical deduction code

String copy1#include"stdio.h"2#include"stdlib.h"3#include"string.h"4 5 /*6 void * __cdecl memcpy (void *, const void *, size_t);7 int __cdecl memcmp (const void *, const void *, size_t);8 void * __cdecl memset (void *, int, size_t);9 char * __cdecl _

C + + constant function long function

The meaning of the constant function is the same as the normal function, because the increment of the Const keyword is embodied in the protection of the class members, and is now explained: 650) this.width=650; "alt=" J_0003.gif "src="

C + + notes (5): Inheritance and polymorphic code implementations

Shape.h1 #ifndef Shape_h2 #defineShape_h3#include string>4 usingSTD::string;5 6 classIShape7 {8 Public:9 Virtual floatGetarea () =0;Ten Virtual stringGetName () =0; One }; A - #endifCircle.h1 #ifndef Circle_h2

C + + File replication

1#include 2#include 3 4 voidCopyChar* SRC,Char*DST);5 intMain ()6 {7 using namespacestd;8 Charsrc[ -] ="E:/test/jdk-8u121-windows-x64.exe";9 Chardst[ -] ="E:\\test\\jdk-8u121-windows-x64_bak.exe";Ten copy (SRC, DST); One A

C # keyword Explicit (display), implicit (implicit), type implicit and explicit conversions

classProgram {Static voidMain (string[] args) {adaptee Ada=Newadaptee (); Target Tar=Ada; } } Public classAdaptee { Public intCode =1; } Public classTarget {Private intdata; PublicTarget (intdata) { This. data =Data }can be

C # Create a compressed file

Source: http://www.cnblogs.com/sparkdev/It is very important to compress and decompress files in the program, which can not only reduce the volume of files, but also protect the files. If you build a file that users can download, it can also greatly

Basic knowledge of C #-Application of Process Control (iv)

Process Control we use it very much in our programming, and in the last chapter we simply introduce each kind of use, and do not apply to the example, it is difficult to understand its real role. Below we will actually use the process Control code

C # uses reflection to determine whether an object contains an implementation of an attribute

This example shows that C # uses reflection to determine whether an object contains an attribute, and for C # program designers, it has a certain learning value.The specific implementation code is as follows:1 /// 2 ///use reflection to determine

On C # parsing Web page

Recently did a project, asked to obtain the major mainstream web page of the key information, I have known the knowledge of web crawler, so think of the web crawler to realize the functionFirst attempt:Use WebClient to get the contents of a remote

C # An example of how delegates and events are understandable

1 usingSystem;2 3 namespaceTest4 {5 Public classRoommate6 {7 Public Delegate voidThis is a delegate ();8 9 Public voidwake up to the morning run ()Ten { OneConsole.WriteLine ("Roommate: Hey, get up! "); A

The application of reflection and extension methods in C #

Some time ago did a practiced hand small project, called Book_bar, used to sell books, using a three-tier architecture, that is, MODELS,IDAL,DAL,BLL and the Web, in the DAL layer in each class has a method is more commonly used, that is Rowtoclass,

Use of switch in C #

Today on the Internet to see someone to give such a program needs, bloggers take memories of the use of switch in C #The program needs are as follows:According to the Day of the week (one ~ th), the export of special dishes"One", "two", "three",

Simple inheritance and polymorphism in C #

Today we are going to talk about inheritance, to be honest today is also my first contact.What is the concept of inheritance? Is that a class can inherit properties and methods (members) of another classInheritance is a very important feature in

C # "Thread" Interlocked lightweight lock

What do you mean, it's lightweight? Because it synchronizes only the shaping data (that is, the int type, the long line) .Use the following table specifically: Interlocked.Increment (ref value) Value plus one (atomic operation)

[c + +] C + + Primer Learning Notes

Below is a record of the concepts and usages that I learned in my daily reading that were not previously clear:Day 1Endl: has the effect of wrapping output and refreshes the buffer associated with the Device.Note: the output statements that are

T4310 Zuma game and t4310 Zuma game

T4310 Zuma game and t4310 Zuma gameDescription Zuma is a game that once swept the world. Its gameplay is: initially arranged on a certain track Colored beads. Any of the three adjacent beads will not be exactly the same color. After that, you can

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