为什么我不能将变量用于“typeof”在 Quartz.NET 中？
我正在尝试使用 Quartz.NET 以 ASP.NET (C#) 形式创建一个作业，到目前为止，这是我所拥有的：
JobDetail jobDetail = new JobDetail(count + "_job", schedID, typeof(HTTPtoFTP));
问题是，我不想直接链接到HTTPtoFTP 类，因为根据用户在表单上选择的内容，它将链接到一个单独的类。我尝试使用变量代替 HTTPtoFTP，但收到错误：
找不到类型或命名空间“mergedJobType”（是否缺少 using 指令或程序集引用？）
这是为什么？我想做到这一点的一种方法是使用 IF 语句，我只需复制该行并更改每种可能性的 typeof，但似乎我也必须复制引用 jobDetail 的所有其他行。
I'm trying to create a job in an ASP.NET (C#) form using Quartz.NET, and here's what I have so far:
JobDetail jobDetail = new JobDetail(count + "_job", schedID, typeof(HTTPtoFTP));
Problem is, I don't want to link directly to the HTTPtoFTP class, because depending on what the user picks on the form , it'll link to a seperate class. I've tried using a variable in place of HTTPtoFTP, but I get the error:
The type or namespace 'mergedJobType' could not be found (are you missing a using directive or an assembly reference?)
Why is this? I guess one way to do this is an IF statement where I just copy the line and change the typeof for each possibility, but it seems like I'd have to replicate all the other lines that refer to jobDetail too.
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评论（5）
除非我遗漏了一些东西，否则我认为您正在寻找的是
mergedJobType.GetType()它返回对象类的类型对象。Unless I'm missing something, I think what you are looking for is
mergedJobType.GetType()That returns the type object of an object's class.在 .NET 中，有两种最常见的方法来检索类型。
当类型在编译时已知时，使用
typeof。当类型仅在运行时已知并且您拥有对该类型的对象的引用时，调用其
GetType()来获取 Type 对象。请注意，对于泛型类型，
typeof(List) 和typeof(List<>)之间存在差异，因此如果您需要大量反射，请使用，您可能想了解如何处理通用运行时类型。In .NET, there are two most common ways to retrieve a type.
When the type is known at compile-time, use
typeof.When the type is only known at runtime and you have a reference to object of that type, call its
GetType()to get the Type object.Note that for generic types there's a difference between, say,
typeof(List<int>)andtypeof(List<>)so if you're into heavy reflection use, you may want to learn how to deal with generic runtime types.因为这正是
typeof的作用，它采用类型标签并返回相关的Type对象。您想要的是
mergedJobType.GetType()。GetType()返回实例的类型。Because that's precisely what
typeofdoes, it takes the label for a type and returns the relevantTypeobject.What you would want would be
mergedJobType.GetType().GetType()returns the type of an instance.您可以使用
mergedJobType.GetType()获取变量的类型。You can get the type of a variable, by using
mergedJobType.GetType().到目前为止，每个人的评论都是正确的。我自己刚刚经历过这个。只要 mergedJobType 是实现 IJob 的类的实例，以下行就应该满足您的需要：
您收到的错误“Job 类必须实现 Job 接口。” :(
Type mergedJobType2 = mergedJobType.GetType(); JobDetail jobDetail = new JobDetail(count + "_job", schedID, mergedJobType2);很可能是由于 mergedJobType 未实现 IJob 接口。所有 Quartz .Net 作业必须实现 IJob 接口。Everyone's comments so far are correct. I just went through this myself. The following line should do what you need as long as mergedJobType is an instance of a class that implements IJob:
The error you're getting "Job class must implement the Job interface.' :(
Type mergedJobType2 = mergedJobType.GetType(); JobDetail jobDetail = new JobDetail(count + "_job", schedID, mergedJobType2);is more than likely due to mergedJobType not implementing the IJob interface. All Quartz.Net jobs must implement the IJob interface.