///<summary>
///数据访问工厂
///生成時間2015-2-13 10:54:34
///塗聚文(Geovin Du)
/// (利用工厂模式+反射机制+缓存机制,实现动态创建不同的数据层对象接口)
///</summary>
public class AbstractFactory
{ protected static string path = ConfigurationManager.AppSettings["WebDAL"]; //"DAL";//生成的DLL文件名 /// <summary>
/// 数据库类型
/// </summary>
protected static string dalType
{ get
{
if (path.Contains("AccessDAL"))
{
//path = "AcessDAL";
return "AccessDAL";
}
else if (path=="DAL")
{
// path = "DAL";//生成的DLL文件名
return "SqlServerDAL";//命名空间名称
}
else if (path.Contains("MySQLDAL"))
{
return "MySQLDAL";
}
else if (path.Contains("DALSQLite"))
{
//path = "DALSQLite";
return "SQLiteDAL";
}
else if (path.Contains("PostgreSQLDAL"))
{
// path = "DALPostgreSQL";
return "PostgreSQLDAL";
}
else if (path.Contains("OracleDAL"))
{
return "OracleDAL";
}
else
{
//path = "DAL";
return "SqlServerDAL";
}
}
} public AbstractFactory()
{ } ///<summary>
///分页接口
/// </summary>
///<returns></returns>
public static ISelectPage CreateSelectPage()
{
//ISelectPage page = new SelectPage();
//return page;
string className = "GeovinDu." + dalType + ".SelectPage";
return (ISelectPage)Assembly.Load(path).CreateInstance(className); //命名空间名称GeovinDu.SqlServerDAL
//path = "AcessDAL";//生成的DLL文件名 } ///<summary>
///CompanyBranch接口
/// </summary>
///<returns></returns>
public static ICompanyBranch CreateCompanyBranch(string _databaseprefix, string _sysdatarolefix)
{
//ICompanyBranch iCompanyBranch = new CompanyBranchDAL();
//return iCompanyBranch;
string className = "GeovinDu." + dalType + ".CompanyBranchDAL";//(_databaseprefix, _sysdatarolefix)
return (ICompanyBranch)Assembly.Load(path).CreateInstance(className); //GeovinDu.SqlServerDAL
} ///<summary>
///EnterpriseType接口
/// </summary>
///<returns></returns>
public static IEnterpriseType CreateEnterpriseType(string _databaseprefix, string _sysdatarolefix)
{
//IEnterpriseType iEnterpriseType = new EnterpriseTypeDAL();
//return iEnterpriseType;
string className = "GeovinDu." + dalType + ".EnterpriseTypeDAL";
return (IEnterpriseType)Assembly.Load(path).CreateInstance(className);
} ///<summary>
///LoginDiaryList接口
/// </summary>
///<returns></returns>
public static ILoginDiaryList CreateLoginDiaryList(string _databaseprefix, string _sysdatarolefix)
{
//ILoginDiaryList iLoginDiaryList = new LoginDiaryListDAL();
//return iLoginDiaryList;
string className = "GeovinDu." + dalType + ".LoginDiaryListDAL";//(_databaseprefix, _sysdatarolefix)
return (ILoginDiaryList)Assembly.Load(path).CreateInstance(className);
} ///<summary>
///OperatingUser接口
///https://msdn.microsoft.com/zh-cn/library/ms173128(VS.80).aspx
///https://*.com/questions/2202381/reflection-how-to-invoke-method-with-parameters
/// </summary>
///<returns></returns>
public static IOperatingUser CreateOperatingUser(string _databaseprefix, string _sysdatarolefix)
{
//IOperatingUser iOperatingUser = new OperatingUserDAL(_databaseprefix, _sysdatarolefix);
//return iOperatingUser;
IOperatingUser iOperatingUser = null;
string className = "GeovinDu." + dalType + ".OperatingUserDAL";//(_databaseprefix, _sysdatarolefix)
//return (IOperatingUser)Assembly.Load(path).CreateInstance(className); //string className = "GeovinDu.SQLiteDAL.OperatingUserDAL";
//Assembly assembly = Assembly.LoadFrom(@"G:\winxp备份\PayrollPrint4\PayrollPrint\bin\Release\DALSQLite.dll");
// object oo = assembly.CreateInstance(className); //得到对象命名空间名
// MethodInfo methodinfo = assembly.GetType("GeovinDu.GeovinDu.SQLiteDAL.OperatingUserDAL").GetMethod("OperatingUserDAL"); //得到方法
//Object obj = methodinfo.Invoke(oo, new object[] { _databaseprefix, _sysdatarolefix });
//IOperatingUser iOperatingUser = (IOperatingUser)obj;
object obj = Assembly.Load(path).CreateInstance(className);
Type t2 = obj.GetType();// Type.GetType("GeovinDu.SQLiteDAL.OperatingUserDAL", false, true);
if (t2 != null)
{
iOperatingUser = (OperatingUserDAL)Activator.CreateInstance(t2, new object[] { }); //Assembly.Load(path).CreateInstance(className); //值為空
} //iOperatingUser = (IOperatingUser)Activator.CreateInstance(System.Type.GetType(className)); return iOperatingUser; } ///<summary>
///PrintWordDocumentTemplateList接口
/// </summary>
///<returns></returns>
public static IPrintWordDocumentTemplateList CreatePrintWordDocumentTemplateList(string _databaseprefix, string _sysdatarolefix)
{
//IPrintWordDocumentTemplateList iPrintWordDocumentTemplateList = new PrintWordDocumentTemplateListDAL();
//return iPrintWordDocumentTemplateList;
string className = "GeovinDu." + dalType + ".PrintWordDocumentTemplateListDAL";//(_databaseprefix, _sysdatarolefix)
return (IPrintWordDocumentTemplateList)Assembly.Load(path).CreateInstance(className);
} /// <summary>
///
/// </summary>
/// <returns></returns>
public static ISysConfig CreateSysConfig()
{ string className = "GeovinDu." + dalType + ".SysConfigDAL";
return (ISysConfig)Assembly.Load(path).CreateInstance(className);
//databaseprefix = _databaseprefix;
//ISysConfig iSysConfig = new DAL.SysConfigDAL();
//return iSysConfig;
}
}
https://github.com/fabriciorissetto/CustomActivator
https://www.codeproject.com/Articles/55710/Reflection-in-NET
https://www.codeproject.com/Articles/14593/A-General-Fast-Method-Invoker
https://github.com/ekonbenefits/impromptu-interface
https://www.codeproject.com/Articles/109868/General-DynamicObject-Proxy-and-Fast-Reflection-Pr
https://www.codeproject.com/articles/15089/an-abstract-factory-using-app-config-and-reflectio
https://www.microsoft.com/net/download/windows
/// <summary>
/// 无构造函数的用法
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="dllname"></param>
/// <param name="fullClassName"></param>
/// <returns></returns>
public static T CreateInstance<T>(string dllname, string fullClassName)
{
//string fullClassName = nameSpace + "." + className;
return (T)Assembly.Load(dllname).CreateInstance(fullClassName);
}
/// <summary>
/// 有構造函數的用法
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="dllname"></param>
/// <param name="fullName"></param>
/// <param name="parameters">构造函数的参数</param>
/// <returns></returns>
public static T CreateInstance<T>(string dllname, string fullName, object[] parameters)
{
try
{
//string fullName = nameSpace + "." + className;//命名空间.类型名
object ect = Assembly.Load(dllname).CreateInstance(fullName, true, System.Reflection.BindingFlags.Default | BindingFlags.Instance | BindingFlags.Public | BindingFlags.NonPublic, null, parameters, null, null);//加载程序集，创建程序集里面的 命名空间.类型名 实例
return (T)ect;//类型转换并返回
}
catch
{
//发生异常，返回类型的默认值
return default(T);
}
}
/// <summary>
/// 有構造函數的用法
/// geovindu
/// 塗聚文 涂聚文
/// Geovin Du
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="fullTypeName"></param>
/// <param name="paramArray">构造函数的参数</param>
/// <returns></returns>
public static T CreateInstance<T>(string fullTypeName, object[] parameters)
{
return (T)Activator.CreateInstance(Type.GetType(fullTypeName), parameters);
}
/// <summary>
/// 有構造函數的用法
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="dllname"></param>
/// <param name="fullTypeName"></param>
/// <param name="paramArray"></param>
/// <returns></returns>
public static T CreateInstanceActivator<T>(string dllname, string fullTypeName, object[] paramArray)
{
Assembly tempAssembly = Assembly.Load(dllname);
Type typeofControl = tempAssembly.GetType(fullTypeName);
return (T)Activator.CreateInstance(typeofControl, paramArray);
}
/// <summary>
/// 有構造函數的用法
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="fullTypeName"></param>
/// <param name="paramArray"></param>
/// <returns></returns>
//public static T CreateInstance<T>(string fullTypeName, params object[] paramArray)
//{
// return (T)Activator.CreateInstance(Type.GetType(fullTypeName), args: paramArray);
//}
/// <summary>
/// 无构造函数的用法
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="fullTypeName"></param>
/// <returns></returns>
public static T CreateInstance<T>(string fullTypeName)
{
return (T)Activator.CreateInstance(Type.GetType(fullTypeName));
}
string dir = Path.GetDirectoryName(Assembly.GetEntryAssembly().Location);
string pdll = dir + @"\DALSQLite.dll";
Type type = Type.GetType("System.String");
object obj = Assembly.Load("DALSQLite").CreateInstance(className, true, System.Reflection.BindingFlags.Default | BindingFlags.Instance | BindingFlags.Public | BindingFlags.NonPublic, null, parameter, null, null);//className
//构造函数 Type t2 = obj.GetType();
object oodu = Activator.CreateInstance(t2,parameter);
//t2.GetConstructors
if (oodu != null)
{
string du = oodu.ToString();
} string[] str = { _databaseprefix, _sysdatarolefix }; //Type type = Type.GetType("System.String");
Assembly pluginAssembly = Assembly.LoadFrom(pdll);
Type dynclasstype = pluginAssembly.GetType(className); Type[] pt = new Type[2];
pt[0] = typeof(string);// typeof(string);
pt[1] = typeof(string);//typeof(string);
//object dynobj = Activator.CreateInstance(dynclasstype);//有構造函數不可以用
object dynobj = Activator.CreateInstance(dynclasstype,parameter);
if (dynobj != null)
{
dynobj.ToString();
ConstructorInfo[] cinfos = dynclasstype.GetConstructors();// (pt);
ConstructorInfo cinfo = cinfos[0];// dynclasstype.GetConstructor(pt); if (cinfo != null)
{
string na = cinfo.Name;
ParameterInfo[] psci = cinfo.GetParameters();
foreach (ParameterInfo pici in psci) //遍历并打印所该构造函数的所有参数
{
string nci=pici.ParameterType.ToString() + " :" + pici.Name + ",";
} }
} Type classType = pluginAssembly.GetType(className);
StringBuilder g = new StringBuilder();
ConstructorInfo[] ci = t2.GetConstructors(); //获取类的所有构造函数
foreach (ConstructorInfo c in ci) //遍历每一个构造函数
{
c.ToString();
ParameterInfo[] ps = c.GetParameters(); //取出每个构造函数的所有参数
foreach (ParameterInfo pi in ps) //遍历并打印所该构造函数的所有参数
{
g.Append(pi.ParameterType.ToString() + " :" + pi.Name + ",");
} }