mirror of
https://github.com/nsnail/FreeSql.git
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112 lines
3.1 KiB
Markdown
112 lines
3.1 KiB
Markdown
# DbFirst
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```csharp
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MySql mysql = new MySql(null, null, "Data Source=127.0.0.1;Port=3306;User ID=root;Password=root;Initial Catalog=cccddd;Charset=utf8;SslMode=none;Max pool size=3", null, null);
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```
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### 获取所有数据库
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```csharp
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var t1 = mysql.DbFirst.GetDatabases();
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//返回字符串数组, ["cccddd", "test"]
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```
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### 获取指定数据库的表信息
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```csharp
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var t2 = mysql.DbFirst.GetTablesByDatabase(mysql.DbFirst.GetDatabases()[0]);
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//返回包括表、列详情、主键、唯一键、索引、外键
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```
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# 生成器
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生成器是基于 dbfirst 开发的辅助工具，适用老项目一键生成实体。生成器采用模板的方式，作者实现了三种生成模板：
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| 模板名称 | 路径 | 类型映射 | 外键导航属性 | 缓存管理 | 失血 | 贫血 | 充血 |
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| ------------- | - | - |- | - |- | - |- |
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| simple-entity | ../Templates/MySql/simple-entity | √ | X | X | √ | X | X |
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| simple-entity-navigation-object | ../Templates/MySql/simple-entity-navigation-object | √ | √ | X | √ | X | X |
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| rich-entity-navigation-object | ../Templates/MySql/rich-entity-navigation-object | √ | √ | √ | X | √ | X |
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> 更多模板逐步开发中。。。
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```csharp
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//定义 mysql FreeSql
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var mysql = new FreeSql.FreeSqlBuilder()
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.UseConnectionString(FreeSql.DataType.MySql, "Data Source=127.0.0.1;Port=3306;User ID=root;Password=root;Initial Catalog=cccddd;Charset=utf8;SslMode=none;Max pool size=10")
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.Build();
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//创建模板生成类现实
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var gen = new FreeSql.Generator.TemplateGenerator();
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gen.Build(mysql.DbFirst,
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@"C:\Users\28810\Desktop\github\FreeSql\Templates\MySql\simple-entity", //模板目录（事先下载）
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@"C:\Users\28810\Desktop\新建文件夹 (9)", //生成后保存的目录
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"cccddd" //数据库
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);
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```
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## 模板语法
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```html
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<html>
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<head>
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<title>{#title}</title>
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</head>
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<body>
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<!--绑定表达式-->
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{#表达式}
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{##表达式} 当表达式可能发生runtime错误时使用，性能没有上面的高
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<!--可嵌套使用，同一标签最多支持3个指令-->
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{include ../header.html}
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<div @for="i 1, 101">
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<p @if="i === 50" @for="item,index in data">aaa</p>
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<p @else="i % 3 === 0">bbb {#i}</p>
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<p @else="">ccc {#i}</p>
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</div>
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<!--定义模块，可以将公共模块定义到一个文件中-->
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{module module_name1 parms1, 2, 3...}
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{/module}
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{module module_name2 parms1, 2, 3...}
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{/module}
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<!--使用模块-->
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{import ../module.html as myname}
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{#myname.module_name(parms1, 2, 3...)}
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<!--继承-->
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{extends ../inc/layout.html}
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{block body}{/block}
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<!--嵌入代码块-->
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{%
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for (var a = 0; a < 100; a++)
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print(a);
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%}
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<!--条件分支-->
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{if i === 50}
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{elseif i > 60}
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{else}
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{/if}
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<!--三种循环-->
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{for i 1,101} 可自定义名 {for index2 表达式1 in 表达式2}
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{for item,index in items} 可选参数称 index
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可自定义名 {for item2, index99 in 数组表达式}
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{for key,item,index on json} 可选参数 item, index，
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可自定义名 {for key2, item2, index99 in 对象表达式}
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{/for}
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<!--不被解析-->
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{miss}
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此块内容不被bmw.js解析
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{/miss}
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</body>
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</html>
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``` |