/// <summary>
/// 根据类型信息创建对象，该对象即使没有公有的构造方法，也可以创建实例
/// </summary>
/// <param name="type">创建类型时的类型信息</param>
/// <param name="constructorParams">创建实例的初始化参数</param>
/// <returns>实例对象</returns>
/// <remarks>运用晚绑定方式动态创建一个实例</remarks>
public static object CreateInstance(System.Type type, params object[] constructorParams)
{
ExceptionHelper.FalseThrow <ArgumentNullException>(type != null, "type");
ExceptionHelper.FalseThrow <ArgumentNullException>(constructorParams != null, "constructorParams");
BindingFlags bf = BindingFlags.Instance | BindingFlags.Public | BindingFlags.NonPublic;
try
{
return(Activator.CreateInstance(type, bf, null, constructorParams, null));
}
catch (TargetInvocationException ex)
{
Exception realEx = ExceptionHelper.GetRealException(ex);
string message = type.AssemblyQualifiedName + ":" + realEx.Message;
throw new TargetInvocationException(message, realEx);
}
}
/// <summary>
/// 根据类型信息，通过反射构造此类型，并且根据构造参数名称找到最匹配的构造方法，然后调用构造方法
/// </summary>
/// <param name="type"></param>
/// <param name="constructorParams"></param>
/// <returns></returns>
public static object CreateInstance(System.Type type, NameValueCollection constructorParams)
{
ExceptionHelper.FalseThrow <ArgumentNullException>(type != null, "type");
ExceptionHelper.FalseThrow <ArgumentNullException>(constructorParams != null, "constructorParams");
BindingFlags bf = BindingFlags.Instance | BindingFlags.Public | BindingFlags.NonPublic;
try
{
ConstructorInfo ci = (ConstructorInfo)type.GetConstructors(bf).GetMatchedMethodInfoByParameterNames(constructorParams.AllKeys);
ExceptionHelper.FalseThrow(ci != null, "不能找到类型{0}的构造方法", type.AssemblyQualifiedName);
return(ci.Invoke(constructorParams));
}
catch (TargetInvocationException ex)
{
Exception realEx = ExceptionHelper.GetRealException(ex);
string message = type.AssemblyQualifiedName + ":" + realEx.Message;
throw new TargetInvocationException(message, realEx);
}
}