在官网找到的.在这里做个备注. private void simpleButton1_Click(object sender, EventArgs e) { ) return; xpPageSelector1.CurrentPage--; UpdateLabel(); } private void UpdateLabel() { labelControl1.Text = , xpPageSelector1.PageCount); } private void simpleButton2_Clic…

How to convert the CriteriaOperator to a lambda expression, so, the latter expression can be used in the IQueryable source using System; using System.Collections.Generic; using System.ComponentModel; using System.Data; using System.Drawing; using Sys…

本主题介绍如何启用管理模型差异(XAFML),并将设置存储在数据库中.   名词解释: 1.模型:XAF中把所有应用程序的结构都用模型来定义,比如列表,有哪些列,名称是什么,对应的字段名是什么,业务对象有哪些,有哪些验证条件等等. 2.模型差异:XAF中的模型是分层次的,结果是继承过来的,低层定义的模型可以认为是公用信息,就像是基类,在派生类中做了重写.如:win和web和mobile都可以继承自基础设置.不同的语言也是可以继承自英语这个基类,在这个基础上进行翻译. 这些数据通常是在设计时组织出…

这个系列通过一些简单例子循序渐进,介绍DevExpress ASP.NET控件的使用.先来介绍一下XPO的使用,安装的DevExpress版本为DXperienceUniversal-12.2.4,使用Visual Studio 2012+Sql Server2005. 什么是XPO? XPO 是 eXpress Persistent Objects的缩写,它是DevExpress公司推出的一个运行在.NETFramwork平台上的ORM工具.Persistent Objects翻译过来时“持久…

首先,我们贴出上一节Users类XPO对象的保存代码,直接建立的XPO Session会话,因为没有与我们所期望的数据层建立绑定, 所以程序自动创建了一个Access数据库,作为默认数据库操作对象来使用,即程序目录下的DevConsole.vshost.mdb数据库文件. using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Threading.Task…

接下来,我们通过一个控制台应用程序,介绍XPO对象的保存操作. 图一 添加新项目 图二 选择项目类型为控制台应用程序 查看生成的Program.cs代码文件,代码如下: using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Threading.Tasks; namespace DevConsole { class Program { static voi…

最近在看devexpress   安装程序中的代码Demos ..  C:\Users\Public\Documents\DevExpress Demos 16.1\Components\WinForms\CS 对于初学者来说,这里边的代码可能会被忽略,但还是必须来看看的,cs下边有很多简单的demo ,  在学习的过程中,可以看到以前从未了解的一些知识点. devexpress 是个功能强大的控件集合,深入下去, 知识量还是满大的. 今天就说说这个xpo ,在cs下ContactManagem…

https://www.devexpress.com/Support/Center/Question/Details/Q487000/xpodatamodel-and-model-interfaces 代码来自于上面的网址,这个代码功能是xpo解析类型信息时,可以有个中转. 这也成了xaf中dc机制的一个关键点,即,接口信息需要有一个真实的对应类型信息才行. 也说是说,接口类型只是一个公开给程序员的信息,ta必须对应一个真实的classinfo,这个classinfo用于xpo解析真实的表\字段…

一．XPO简介: XPO即eXpress Persistent Objects for .NET,现在这里介绍的版本是1.5. XPO在应用程序代码和数据库之间扮演了一个中间层的角色,简单而言,就是将面向对象编程所建立的对象在数据库中做一个映射,使之和数据库中的表建立一一对应的关系.XPO现在的版本已经可以处理对象之间一对多,多对多等关系的处理,继承在数据库中的实现以及根据情况处理进行数据库的并发访问,提高系统的效率. XPO最大的好处就是可以将应用程序开发者从繁琐的数据库设计中解脱出来,专心建…

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…

From the Tutorial and other documentation sources, you learned how to create business classes for your XAF applications. If you have business classes in your application, you have database tables in the application's database. However, the reality is…

When designing business classes, a common task is to ensure that a newly created business object is initialized with default property values. This topic explains how different types of properties can be initialized. As an example, a Contact business…

In this topic, you will learn how to use the Upcasting feature of XPO in XAF. It is useful when you need to combine base and derived classes in a single query. 在本主题中,您将学习如何在 XAF 中使用 XPO 的转换功能.当您需要在单个查询中合并基类和派生类时,它很有用. Tip 提示 Upcasting is not supporte…

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…

This topic demonstrates how to create a simple XAF application that uses both the Entity Framework (EF) and eXpress Persistent Objects (XPO) business models. For instance, this approach is required if you want to reuse the Entity Framework model from…

This lesson explains how to set rules for business classes and their properties. These rules are validated when an end-user executes a specified operation. This lesson will guide you through implementation of a rule that requires that the Position.Ti…

In this lesson, you will learn how to set the default value for a particular property of a business class. For this purpose, the Priority property will be added to the DemoTask class created in the Set a Many-to-Many Relationship (XPO) lesson. To ini…

In this lesson, you will learn how to implement properties whose values can depend on other properties. The Manager property will be added to the Contact class. By default, it will be represented by a lookup editor containing all Contacts that exist…

In this lesson, you will learn how to implement business classes for your application using the Business Class Library. This library contains the most typical ready-to-use business classes. You will implement a custom Contact class by deriving from t…

In this lesson, you will learn how to set relationships between business objects. For this purpose, the Task business class will be implemented and a Many-to-Many relationship will be set between the Contact and Task objects. You will also learn the…

In this lesson, you will learn how to implement business classes from scratch. For this purpose, the Department and Position business classes will be implemented. These classes will be used in the Contact class, implemented previously. You will also…

In this lesson, you will learn how to use business classes from the Business Class Library as is. For this purpose, you will add the Event business class to the application. 在本课中,您将学习如何使用来自 Business 类库中的业务类.为此,您将事件业务类添加到应用程序. Note Before proceeding,…

In this lesson, you will learn how to set a one-to-many relationship between business objects. The Contact and Department business objects will be related by a one-to-many relationship. For this purpose, the Contacts property will be added to the Dep…

https://www.devexpress.com/Support/Center/Example/Details/T333879…

//目的,想自己生成实体类,不走dc的生成机制,所以研究一下此方法.public void GenerateEntities(string generatedAssemblyFile) { lock (this.lockObjectForDC) { //此数组为要生成代码的接口类型 Type[] entityInterfaces = this.entitiesToGenerateInfo.GetEntityInterfaces(); )) { //生成过了,且有实体接口,有文件的情况下,直接加载…

最近用DevExpress的WPF图表控件做柱形图看板,总结记录了一些笔记: 1.显示图例: <dxc:ChartControl.Legend> <dxc:Legend /> </dxc:ChartControl.Legend> 2.柱形图标题: <dxc:ChartControl.Titles> <dxc:Title HorizontalAlignment="Center" VerticalAlignment="Cent…

Open the Updater.cs (Updater.vb) file, located in the MySolution.Module project's Database Update folder. Add the following code to the ModuleUpdater.UpdateDatabaseAfterUpdateSchema method. 打开位于 MySolution.模块项目的数据库更新文件夹中的Updater.cs(Updater.vb)文件.将以下代…

Solutions Design 公司于2016年5月发布了LLBL Gen Pro 5.0,这个新版本的发布出乎于我的意料.我的猜想是从4.2升级到4.5,再升级5.x版本,主版本号的变更会给原有客户带来成本上的压力.299欧元的售价对于中小创业公司或大公司并不算便宜,在官网上查了一下最新的报价,如下表所示: Number of licenses Price per license Standard Price per license Plus 1 to 2 € 299.- € 398.- 3…

split 虽然不好用, 但是还是可以用一下的! 有两个方式拆分, 按固定的行数, 按固定的大小. 默认是 1000 行, 后缀长度为2, 后缀长度N是说, 分片从N个字母/数字 的最小值 到 其最大值 #split --h用法:split [选项]... [输入 [前缀]]将输入内容拆分为固定大小的分片并输出到"前缀aa"."前缀ab",...:默认以 1000 行为拆分单位,默认前缀为"x".如果不指定文件,或者文件为"-"…

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