Hangfire.BackgroundJob.Enqueue使用VB(Hangfire.BackgroundJob.Enqueue Using VB)

Hangfire.BackgroundJob.Enqueue使用VB(Hangfire.BackgroundJob.Enqueue Using VB)

我刚刚开始尝试使用Hangfire。 我已经成功安装但是我在创建第一份工作时遇到了困难。

Hangfire.BackgroundJob.Enqueue(Function() Console.WriteLine("Fire-and-forget"))

这不会编译：

重载决策失败，因为无法使用以下参数调用可访问的'Enqueue'：'公共共享重载函数入队（T）（methodCall As Expression（Of Action（Of T）））As String'：类型参数'T'不能推断。 '公共共享重载函数入队（T）（methodCall作为表达式（Of Func（Of T，Task）））As String'：无法推断类型参数'T'。

任何想法如何解决？ 谢谢

I've just started to try and use Hangfire. I've installed successfully but I'm having difficulty creating the first job.

Hangfire.BackgroundJob.Enqueue(Function() Console.WriteLine("Fire-and-forget"))

This won't compile:

Overload resolution failed because no accessible 'Enqueue' can be called with these arguments: 'Public Shared Overloads Function Enqueue(Of T)(methodCall As Expression(Of Action(Of T))) As String': Type parameter 'T' cannot be inferred. 'Public Shared Overloads Function Enqueue(Of T)(methodCall As Expression(Of Func(Of T, Task))) As String': Type parameter 'T' cannot be inferred.

Any ideas how to fix? Thanks

最满意答案

Console.WriteLine方法不返回任何内容。 只需将Function关键字替换为Sub即可获取工作表达式树：

BackgroundJob.Enqueue(Sub() Console.WriteLine("Fire-and-forget"))

The Console.WriteLine method doesn't return anything. Just replace Function keyword with Sub to get a working expression tree:

BackgroundJob.Enqueue(Sub() Console.WriteLine("Fire-and-forget"))