Lotech.Data 2.0.16

Lotech.Data.Core

an ORM like "EnterpriseLib Data Block" for dotnet

使用

引用 Lotech.Data.dll

• 前往 nuget.org 手工下载
• 或 通过 Visual Studio 包管理器控制台安装

  Install-Package Lotech.Data.Core

配置 database.xml

配置包含驱动、连接串及默认设置内容，提供给 DatabaseFactory.Create() 、DatabaseFactory.Create(string connectionName) 使用

<database>
    <dbProviderFactories>
        
        <add name="System.Data.SqlClient" type="System.Data.SqlClient.SqlClientFactory, System.Data.SqlClient"/>        
    </dbProviderFactories>

    <connectionStrings>
        <add name="connection" providerName="System.Data.SqlClient"
             connectionString="Data Source=.; User Id=sa; Password=123456; Initial Catalog = example" />
    </connectionStrings>

    
    <databaseSettings defaultDatabase="connection" />
</database>

Api使用

实例化 IDatabase

• 通过 DatabaseFactory 创建实例

  var db = new DatabaseFactory.Create();  // 使用默认连接创建

  var db = new DatabaseFactory.Create("connection");  // 使用指定的连接名创建

• 直接创建对应实例

  var db = new SqlServerDatabase(System.Data.SqlClient.SqlClientFactory.Instance) {
    ConnectionString = "Data Source=.; User Id=sa; Password=123456; Initial Catalog = example; 
  };

配置SQL日志输出 Log

var db = DatabaseFactory.Create();
db.Log = message => Console.WriteLine(log);     // 将SQL执行日志输出到控制台

获取 DbCommand

• 获取给定类型的 DbCommand 对象

    public DbCommand GetCommand(CommandType commandType, string commandText);

示例:

  var sqlCommand = db.GetCommand(CommandType.Text, "SELECT * FROM example");
  var procedureCommand = db.GetCommand(CommandType.Procedure, "MyProc");

• 获取Text类型的 DbCommand 对象

    public DbCommand GetSqlStringCommand(string commandText);

示例:

  var sqlCommand = db.GetSqlStringCommand( "SELECT * FROM example");

执行存储过程 Procedure

using Lotech.Data;

class MyDAO {
  IDatabase db = DatabaseFactory.Create(); // use default database
  
  public MyEntity[] GetMyEntities(string userId, DateTime createDate) {
      // exec MyProc @userId, @date
      // db.ProcedureQuery is extension method, using Lotech.Data is required.
      return db.ProcedureQuery("MyProc", new {userId, date = createDate}).ExecuteEntities<MyEntity>();
  }
}