When you create a new project that makes use of Entity Framework 5, you'll notice how it uses LocalDb by default now. But let's assume you have a fully working instance of Sql Server that you wish to work against instead of LocalDb. How do you tell E…

一个典型的EF应用大多数情况下是一个DbContext的派生类(derived class)来控制,通常可以使用该派生类调用DbContext的构造函数,来控制以下的东西: (1).上下文如何连接到数据库(给定连接字符串) (2).上下文是通过Code First语法计算模型还是使用EF 设计器 (3).额外的高级选项 下面是DbContext构造器的常用的用途: 一.DbContext无参构造函数 如果当前EF应用中没有做任何的配置.且在你自定义的数据库上下文类中没有调用DbContext带参…

Installation redis-py requires a running Redis server. See Redis’s quickstart for installation instructions. To install redis-py, simply: $ sudo pip install redis or alternatively (you really should be using pip though): $ sudo easy_install redis or…

我亦MSDN 原文地址 http://msdn.microsoft.com/en-us/data/jj556606 Entity Framework allows a number of settings to be specified from the configuration file. In general EF follows a ‘convention over configuration’ principle. All the settings discussed in this…

One of the first issues you will likely encounter when getting started with ASP.NET Identity centers on customizing the underlying data model. The Entity Framework provider uses Code-First to generate the data model and, initially, it may seem as if…

当前环境为EF Code First开发模式中 一.EF默认约定 1.常用约定 (1).当没有显示指定实体主键的时候,EF会默认将长得最像Id的属性(且类型为GUID)设为主键 (2).设计实体时,当一个实体包含一个集合属性,该集合属性里面的元素是另一个实体时,则默认未一对多关系,即使没有显示的指定一对多的关系,EF会默认的设置主外键(主从)关系 (3).一对一的实体关系,需要手动设置主从关系 (4).多对多无载荷关系实体,EF自动生成中间表,不需要新增实体来表示. (5).表名默认复数化 2.…

Entity Framework Migrations are handled from the package manager console in Visual Studio. The usage is shown in various tutorials, but I haven’t found a complete list of the commands available and their usage, so I created my own. There are four ava…

There is often quite a lot of confusion about how best to set up a database connection with Mongoose. So I thought I'd clear it up! There are two ways of establishing a Mongoose connection, using the default connection or a named connection. In this…

SQL Server Connection Pooling (ADO.NET) Connecting to a database server typically consists of several time-consuming steps. A physical channel such as a socket or a named pipe must be established, the initial handshake with the server must occur, the…

本文转自:http://www.connectionstrings.com/oracle/ Standard Data Source=MyOracleDB;Integrated Security=yes; This one works only with Oracle 8i release 3 or later Oracle Specifying username and password Data Source=MyOracleDB;User Id=myUsername;Password=my…

Chapter6 Controlling Database Location,Creation Process, and Seed Data 第6章 控制数据库位置,创建过程和种子数据 In previous chapters you have seen how convention and configuration can be used to affect the model and the resulting database schema. In this chapter you wi…

Total Commander 8.52 Beta 1http://www.ghisler.com/852_b1.php 10.08.15 Release Total Commander 8.52 beta 1 (32/64) 05.08.15 Fixed: Windows 10: Loading drive buttonbar hanging on some devices (e.g. Surface Pro 3) when SD-Card was in internal card reade…

1. Introducing the ADO.NET Entity Framework ado.net entity framework 介绍 1 The Entity Relationship Model: Programming Against a Model,Not the Database 实体关系模型:使用模型编程,而非数据库 2 The Entity Data Model: A Client-Side Data Model 试题对象模型:客户端对象模型 3 Entities: Blu…

RAC: Frequently Asked Questions [ID 220970.1]   修改时间 13-JAN-2011     类型 FAQ     状态 PUBLISHED   Applies to: Oracle Server - Enterprise Edition - Version: 9.2.0.1 to 11.2.0.1 - Release: 9.2 to 11.2 Purpose Frequently Asked Questions for Real Applicatio…

One of the first issues you will likely encounter when getting started with ASP.NET Identity centers on customizing the underlying data model. The Entity Framework provider uses Code-First to generate the data model and, initially, it may seem as if…

1. Introduction 1.1. About 1.2. Sphinx features 1.3. Where to get Sphinx 1.4. License 1.5. Credits 1.6. History 2. Installation 2.1. Supported systems 2.2. Compiling Sphinx from source 2.2.1. Required tools 2.2.2. Compiling on Linux 2.2.3. Known comp…

UPDATE: the source code for DbContextScope is now available on GitHub: DbContextScope on GitHub. A bit of context This isn't the first post that has been written about managing the DbContext lifetime in Entity Framework-based applications. In fact, t…

    由于EF7只支持codefirst only.朕无奈被微软逼上了梁山学一下codefirst,就算是为明年做准备吧.写的这些网上大致都有,基本没啥 新内容, 迁移 使用自动迁移 Enable-Migrations –EnableAutomaticMigrations    第一次迁移 Enable-Migrations     修改表结构 Add-Migration 将基于您已经对模型所做的更改构建下一次迁移的框架. Update-Database 将所有挂起的更改应用到数据库. 除非确…

User 用于访问DB Users based on logins in master (This is the most common type of user.) User based on a login based on a Windows user. User based on a login based on a Windows group. User based on a login using SQL Server authentication. Users based on W…

#    WELCOME TO SQUID 3.0.STABLE26#    ----------------------------##    This is the default Squid configuration file. You may wish#    to look at the Squid home page (http://www.squid-cache.org/)#    for the FAQ and other documentation.##    The def…

我是今天看到tomcat数据源的配置时,想起来这个问题,刚开始还不晓得thin是什么东西! database.url=jdbc:oracle:thin:angel/oracle@192.168.55.11:1530:monitordb 经过上网查询,得到如下结果: jdbc:oracle连接的是oracle数据库 thin是一种方法 angel/oracle那个angel是用户名,oracle是密码 192.168.55.11是你要连的电脑ip 1530是oracle的连端口(1521貌似是默认…

LAMP搭建之二:apache配置文件详解(中英文对照版) # This is the main Apache server configuration file. It contains the # configuration directives that give the server its instructions. # See <URL:http://httpd.apache.org/docs/2.2/> for detailed information. # In particu…

Child objects within SharePoint, like a list in a Site, share an inherent connection with that Parent object. Today's blog is regarding the usage of one SharePoint object like a list and how we can project that list into other locations. Now in the e…

目录 . 进程相关数据结构 ) struct task_struct ) struct cred ) struct pid_link ) struct pid ) struct signal_struct ) struct rlimit . 内核中的队列/链表对象 ) singly-linked lists ) singly-linked tail queues ) doubly-linked lists ) doubly-linked tail queues . 内核模块相关数据结构 ) st…

This is a quick guide covering nearly all of Nemerle's features. It should be especially useful to anyone who is already familiar with C# or a similar language: Table of Contents Variables Operators Logical Operators Bit Operators Type Casts/Conversi…

研一的时候开始使用Qt,感觉用Qt开发图形界面比MFC的一套框架来方便的多.后来由于项目的需要,也没有再接触Qt了.现在要重新拾起来,于是要从基础学起. Now,开始学习Qt事件处理机制. 元对象系统的构成 QObject为所有需要利用元对象系统的对象提供一个基类. Q_OBJECT宏,在类的声明体内激活meta-object功能,比如动态属性.信号和槽. Meta Object Compiler(MOC),为每个QObject派生类生成代码,以支持meta-object功能. QObject定…

# ===================================================================# COMMON SPRING BOOT PROPERTIES## This sample file is provided as a guideline. Do NOT copy it in its# entirety to your own application. ^^^# ========================================…

Using the Emulator In this document Overview Android Virtual Devices and the Emulator Starting and Stopping the Emulator Installing Applications on the Emulator Using Hardware Acceleration Configuring Graphics Acceleration Configuring Virtual Machine…

使用 AVFoundation系统库来进行二维码扫描并且限制扫描二维码的范围.(因为默认的是全屏扫描) -(void)beginCode { //1.摄像头设备 AVCaptureDevice *device = [AVCaptureDevice defaultDeviceWithMediaType:AVMediaTypeVideo]; /* // Media types AVMediaTypeVideo AVMediaTypeAudio AVMediaTypeText AVMediaTypeC…

主类: package bqw.tool; import java.util.ResourceBundle;import java.sql.DriverManager;import java.sql.Connection;import java.sql.ResultSet;import java.sql.ResultSetMetaData;import java.sql.Statement;import java.sql.Types;import java.io.File;import java…