How to: Create a Business Model in the XPO Data Model Designer This topic provides step-by-step instructions on how to use the XPO Data Model Designer in XAF applications. We will create a simple business model consisting of two objects - Employee an…

This topic provides step-by-step instructions on how to use the XPO Data Model Designer in XAF applications. We will create a simple business model consisting of two objects - Employee and Task. These objects will be linked with a one-to-many relatio…

http://www.entityframeworktutorial.net/EntityFramework5/create-dbcontext-in-entity-framework5.aspx 官网的教程https://msdn.microsoft.com/en-us/data/jj206878 Here, we are going to create an Entity Data Model (EDM) for SchoolDB database and understand the ba…

Create Entity Data Model: Here, we are going to create an Entity Data Model (EDM) for SchoolDB database and understand the basic building blocks. Entity Data Model is a model that describes entities and the relationships between them. Let's create fi…

If you have a non-XAF application, and want to develop an XAF application that utilizes the same database, you can generate business classes for an existing database to achieve this task. However, if your existing application is based on the Entity F…

This topic describes how to define the business model and the business logic for WinForms and ASP.NET applications. The applications' business model contains two logical parts that are implemented via different ORM tools: 本主题描述如何定义WinForms和ASP.net的业务…

HBase Data Model--HBase 数据模型(翻译) 在HBase中,数据是存储在有行有列的表格中.这是与关系型数据库重复的术语,并不是有用的类比.相反,HBase可以被认为是一个多维度的映射. HBase数据模型术语 Table(表格) 一个HBase表格由多行组成. Row(行) HBase中的行里面包含一个key和一个或者多个包含值的列.行按照行的key字母顺序存储在表格中.因为这个原因,行的key的设计就显得非常重要.数据的存储目标是相近的数据存储到一起.一个常用的行的key…

A Model represents some object that your application manages. For example, one might define a Model for Users, Products, Cars, or any other real-world object that we want to model in the system. Models are registered via the model manager, and are us…

Instead of add todo as a string, we create a data model: export class TodoModel{ constructor( public title: string = "" ){} } export class TodoService{ todos: TodoModel[] = [ new TodoModel('eat'), new TodoModel('sleep'), new TodoModel('work') ];…

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…