null check

Foreach (repeateritem item in this. repeater1.items){Htmlinputcheckbox check = (htmlinputcheckbox) item. findcontrol ("cbdelete1 ");If (check! = NULL){Check. Checked = true;}} For (INT I = 0; I {Htmlinputcheckbox check = (htmlinputcheckbox) This.

DROP TABLE IF EXISTSTestcheck;CREATE TABLEUsers (user_id INT not NULLauto_increment, usernameVARCHAR( -) not NULL, PasswordVARCHAR( -) not NULL, PRIMARY KEY(user_id) ) ENGINE=InnoDB;INSERT intoUsersVALUES(NULL,'Test','123456');DROP

I. SQL statement (1) Select query statement Syntax: SELECT [ALL | DISTINCT] Target column expression [AS column name] [, target column expression [AS column name]...] FROM table name [, table name…] [WHERE condition expression [AND | OR condition

SQL constraints 2009-04-2709: 29 constraints mainly include: NOTNULLUNIQUEPRIMARYKEYFOREIGNKEYCHECKDEFAULT1 and notnull: The content used to control fields must not be NULL ). Usage: CreatetableMyTable (idvarchar (32) notnull, namevarchar (32) 2.

This article mainly introduces the difference between is and as in C #, analyzes the principle and characteristics of IS and as as well as the usage difference, has a good learning value, the need for friends can refer to the followingThis paper

Http://www.runoob.com/design-pattern/singleton-pattern.htmlThe singleton mode may be the least code mode, but less does not necessarily mean simple, want to use good, with the singleton mode, it really cost a brain. This paper makes a summary of the

Reprint Original Address http://www.cnblogs.com/sunshineground/p/4350216.htmlIn ASP., there are several ways to transfer the number of small amounts of data between controller and view between pages: ViewData, ViewBag, TempData, and session

-- Database creation If exists (select * From SYS. sysdatabases where name = 'wf ')BeginUse masterDrop database WfEndGo Create Database Wf On(Name = n' WF ', filename = n' E: \ mycode \ etc toll station \ etc_data \ WF. MDF ', size = 3 MB,

-- Create a customer information tableCreate Table custominfo(CID nvarchar (20) not null primary key,Cpassword nvarchar (30) not null check (LEN (cpassword)> = 6 ),Csum int not null default (0))Go Insert into custominfo (CID, cpassword, csum)Values (

In-depth understanding of PHP principles in the extended loading process why xdebug extension must be loaded as a zend extension? What is zend extension and what are the differents between regular php extension and zend extension? Let's start

The above is a simplified version diagram.User: User table, which stores User informationRole: Role table, which stores Role informationUserInRole: User Role ing table, which stores the relationship between users and roles. Multiple-to-many: one

Document directory Setup command Overview 2. Transport Header (1.1) 3. Get parameters from subsession (1.2) The setup command provides an overview of the setup command, which is mainly used to negotiate the communication details between the

What should I do if SQL server needs to store 10 million pieces of data? The company has a large business system with a large amount of data. Each of the major items of data exceeds 10 million records. I have been using sqlserver for a long time. I

I. Introduction Type security is one of the key considerations at the beginning of. net design.ProgramDesigners are often unable to fully grasp the type security of system data. Now, all this has been solved for you in the design framework of

  Starting address: http://bbs.hpx-party.org/thread-9143-1-1.html All putty and winscp files downloaded from unofficial websites have backdoors. Check them all over the company. Confirmed by Jinshan network anti-virus engineer Li tiejun. Putty and

The Singleton mode is the creation mode in the design mode, that is, when an object is created, we do not directly instantiate the object. Instead, the program determines the method of creating the object based on the specific scenario, this

Python & MySQLEnvironment: windows8 + Python2.7 + MySQL5.6I tried to embed the SQL language in C/C ++, and finally failed in its complicated "tedious" Environment configuration. Later I found that Python and MySQL are easier to implement, in Python,

Copy codeThe Code is as follows: using System; Using System. Collections; Using System. Collections. Specialized; Using System. Data; Using System. Data. OracleClient; Using System. Configuration; Using System. Data. Common; Using System.

Copy codeThe Code is as follows: create database MyDb On ( Name = mainDb, Filename = 'C: \ MyDb \ mainDb. mdf ', Size = 10, Maxsize = 100, Filegrowth = 4 ), ( Name = secondDb, Filename = 'C: \ MyDb \ secondDb. ndf ', Size = 15, Maxsize =

The LAMP (Linux-Apache-MySQL-PHP) website architecture is currently a popular Web framework, including: Linux operating system, Apache network server, MySQL database, perl, PHP, or Python programming language. All components are open-source software