NBear学习笔记(一)

使用已有数据库。(之前先设计实体,再自动生成数据库,发现每次重新生成时,数据库测试数据都清空了)。

本文参考Teddy's Knowledge Base的相关文章,这篇文章只演示单表操作.

Step1: 创建数据库NBearDB

CREATE TABLE [dbo].[User] (
[ID] [uniqueidentifier] NOT NULL ,
[FirstName] [nvarchar] (50) ,
[Status] [bit] NULL ,
[Birthday] [datetime] NULL ,
[Email] [nvarchar] (127)
) ON [PRIMARY]


Step2:创建解决方案和配置

(1)安装下载的Nbear组件下dist/SetupNBearVsPlugin.exe插件(可自动生成实体类)

(2)打开VS2005,新建一个空的解决方案,添加两个C#类库工程EntityDesigns和Entities,删除自动生成的class1.cs.

(3)添加一个website的网站项目。

(4)在Entities下添加Entities.cs, 在网站根目录下添加web.config文件和EntityConfig.xml文件.

(5)修改web.config文件

<configSections>
<section name="entityConfig" type="NBear.Common.EntityConfigurationSection, NBear.Common"/>
</configSections>
<entityConfig>
<includes>
<add key="Sample Entity Config" value="~/EntityConfig.xml"/>
</includes>
</entityConfig>
<appSettings/>
<connectionStrings>
<add name="DbName" connectionString="Server=WDS;Database=NBearDB;Uid=sa;Pwd=sa"
providerName="NBear.Data.SqlServer.SqlDbProvider"/>
</connectionStrings>



(6)在EntityDesigns目录下添加EntityDesignToEntityConfig.xml文件,内容如下:

<?xml version="1.0" encoding="utf-8" ?>
<EntityDesignToEntityConfiguration xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:xsd="http://www.w3.org/2001/XMLSchema">
<CompileMode>Debug</CompileMode>
<InputDllName>EntityDesigns.dll</InputDllName> //实体设计类
<OutputNamespace>Entities</OutputNamespace> //实体类
<OutputLanguage>C#</OutputLanguage> //输出语言
<!--<OutputCodeFileEncoding>utf-8</OutputCodeFileEncoding>-->
<EntityCodePath>../Entities/Entities.cs</EntityCodePath> //实体类文件
<EntityConfigPath>../website/EntityConfig.xml</EntityConfigPath>
<SqlSync enable="false"> //更改实体时,是否同步更新数据库,建议设为false,否则将清空现有数据库的数据
<SqlServerFolder>C:/Program Files/Microsoft SQL Server/80/Tools/Binn</SqlServerFolder>
<ServerName>WDS</ServerName>
<UserID>sa</UserID>
<Password>sa</Password>
<DatabaseName>NBearDB</DatabaseName>
</SqlSync>
</EntityDesignToEntityConfiguration>

(7)在EntityDesigns目录下添加EntityDesigns.cs

(8)打开下载的Nbear组件下dist/NBear.Tools.DbToEntityDesign.exe程序 ,设置连接字符串,我的是这样:

Server=WDS;Database=NBearDB;Uid=sa;Pwd=sa 点击connect, 选择要生成的表,点击Generate Entities Design.将会得到下面的代码:

using System;
using System.Collections.Generic;
using System.Text;
using NBear.Common.Design;
namespace EntityDesigns
{
public interface User : Entity
{
[PrimaryKey]
Guid ID { get; set; }
[SqlType("nvarchar(50)")]
string FirstName { get; set; }
bool? Status { get; set; }
DateTime? Birthday { get; set; }
[SqlType("nvarchar(127)")]
string Email { get; set; }
}
}

拷贝上面的代码到EntityDesigns.cs,为EntityDesigns添加NBear.Common.Design引用.

(9)编译EntityDesigns工程,编译成功,刚才添加Entities.cs,EntityConfig.xml文件将被自动填入正确的内容。

(10)为Entities工程引用NBear.Common,然后编译Entities工程。

(11)为WebSite添加Entities项目编译后的Entities.dll.再引用NBear.Data



Step 3 :OK,现在开始使用了。

using System;
using System.Data;
using System.Configuration;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using Entities;
using NBear.Common;
using NBear.Data;

public partial class _Default : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{

//取得数据
Gateway gateway = new Gateway("DbName");
User[] u = gateway.FindArray<User>();

GridView1.DataSource = u;
GridView1.DataBind();
}

}

//添加数据

Gateway gateway = new Gateway("DbName");
User d = new User();
d.Email = "jackxfsdfsdf";
d.Name = "very good";
d.Status = true;
gateway.Save(d);
备注:加入我们把FirstName字段改为Name,那么我们只需要把EntityDesigns.cs里把这句改为

[MappingName("Name")]
string FirstName{ get; set; }

重新编译EntityDesign工程就可以了。

运行,大功告成。

本篇文章来源于 站长中国 转载请以链接形式注明出处 网址:http://www.zzchn.com/edu/20080727/90845.shtml

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