You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
50 lines
1.7 KiB
50 lines
1.7 KiB
using System;
|
|
using System.Reflection;
|
|
using System.Configuration;
|
|
using OT.IDAL;
|
|
namespace OT.DALFactory
|
|
{
|
|
/// <summary>
|
|
/// 抽象工廠模式創建DAL
|
|
/// web.config 需要加入配置：（利用工程模式+反射機制+緩存機制，實現動態創建不同的數據層對象接口）
|
|
/// DataCache類在導出代碼的檔案夾裏
|
|
/// <appSettings>
|
|
/// <add key="DAL" value="OT.SQLServerDAL" />
|
|
/// </appSettings>
|
|
/// </summary>
|
|
public sealed class DataAccess
|
|
{
|
|
private static readonly string AssemblyPath = ConfigurationManager.AppSettings["DAL"];
|
|
/// <summary>
|
|
/// 創建對象或從緩存獲取
|
|
/// </summary>
|
|
public static T CreateObject<T>(string AssemblyPath, string ClassNamespace)
|
|
{
|
|
T objType = default(T);//= DataCache.GetCache(ClassNamespace);//從緩存讀取
|
|
if (objType == null)
|
|
{
|
|
try
|
|
{
|
|
objType = (T)Assembly.Load(AssemblyPath).CreateInstance(ClassNamespace);//反射創建
|
|
//DataCache.SetCache(ClassNamespace, objType);// 寫入緩存
|
|
}
|
|
catch
|
|
{ }
|
|
}
|
|
return objType;
|
|
}
|
|
|
|
/// <summary>
|
|
/// 通過泛型實例化數據層接口
|
|
/// </summary>
|
|
/// <typeparam name="T">數據層接口對象</typeparam>
|
|
/// <param name="ClassName">數據層名稱</param>
|
|
/// <returns>數據層接口實例化對象</returns>
|
|
public static T Create<T>(string ClassName)
|
|
{
|
|
string ClassNamespace = AssemblyPath + "." + ClassName;
|
|
return CreateObject<T>(AssemblyPath, ClassNamespace);
|
|
}
|
|
|
|
}
|
|
}
|