当我尝试通过程序集创建类型的实例时发生异常.创建实例方法

本文关键字：创建 实例 实例方法 异常 类型 过程 程序集 | 更新日期: 2023-09-27 18:32:30

当我尝试通过汇编创建类型的实例时发生异常。创建实例方法。这是我发生异常的代码

Assembly assembly = Assembly.LoadFrom(@"C:'Program Files'Common Files'Microsoft Shared'Web Server Extensions'14'ISAPI'Microsoft.Office.Server.UserProfiles.dll");
Type type = assembly.GetType("Microsoft.Office.Server.UserProfiles.UserProfileManager");
object ins = assembly.CreateInstance(type.FullName);
System.Reflection.TargetInvocationException: Exception has been thrown by the target of an invocation. --->     System.ArgumentNullException: Value cannot be null.
Parameter name: serviceContext
   at Microsoft.Office.Server.UserProfiles.ProfileManagerBase..ctor(SPServiceContext serviceContext)
   at Microsoft.Office.Server.UserProfiles.ProfileManagerBase..ctor(SPServiceContext serviceContext, Boolean ignorePrivacy)
   at Microsoft.Office.Server.UserProfiles.UserProfileManager..ctor(SPServiceContext serviceContext, Boolean IgnoreUserPrivacy, Boolean backwardCompatible)
   at Microsoft.Office.Server.UserProfiles.UserProfileManager..ctor()
   --- End of inner exception stack trace ---
   at System.RuntimeTypeHandle.CreateInstance(RuntimeType type, Boolean publicOnly, Boolean noCheck, Boolean& canBeCached, RuntimeMethodHandleInternal& ctor, Boolean& bNeedSecurityCheck)
   at System.RuntimeType.CreateInstanceSlow(Boolean publicOnly, Boolean skipCheckThis, Boolean fillCache)
   at System.RuntimeType.CreateInstanceDefaultCtor(Boolean publicOnly, Boolean skipVisibilityChecks, Boolean skipCheckThis, Boolean fillCache)
   at System.Activator.CreateInstance(Type type, Boolean nonPublic)
   at System.RuntimeType.CreateInstanceImpl(BindingFlags bindingAttr, Binder binder, Object[] args, CultureInfo culture, Object[] activationAttributes)
   at System.Activator.CreateInstance(Type type, BindingFlags bindingAttr, Binder binder, Object[] args, CultureInfo culture, Object[] activationAttributes)
   at System.Reflection.Assembly.CreateInstance(String typeName, Boolean ignoreCase, BindingFlags bindingAttr, Binder binder, Object[] args, CultureInfo culture, Object[] activationAttributes)
   at System.Reflection.Assembly.CreateInstance(String typeName)
   at HomeWork.Program.Main(String[] args) in c:'users'amasud'documents'visual studio 2010'Projects'HomeWork'HomeWork'Program.cs:line 23

当我尝试通过程序集创建类型的实例时发生异常.创建实例方法

我不知道

为什么要以反射方式创建Microsoft.Office.Server.UserProfiles.UserProfileManager对象。在您的情况下，您必须将 SPServerContext 传递给构造函数。这是您可以做到的。

Assembly assembly = Assembly.LoadFrom(@"C:'Program Files'Common Files'Microsoft Shared'Web Server Extensions'14'ISAPI'Microsoft.Office.Server.UserProfiles.dll");
SPServiceContext serviceContext = SPServiceContext.Current;
Type type = assembly.GetType("Microsoft.Office.Server.UserProfiles.UserProfileManager");
object ins = Activator.CreateInstance(type, serviceContext);

从外观上看，无论您创建哪种类型，都需要构造函数中的 serviceContext 参数。您尚未设置它，因此它会崩溃。

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