How to Start Multiple Threads Dynamically by casting variable names as Object

问题

Not sure how hard this will be or if casting is involved but here is what i'd like ( vb.net code please )

What I would like is simply a Loop that will create different Threads with different names.

dim variableName="Thread"
for i as Integer = 0 to 5
    "dim " & variableName & (i) & "as new Threading.Thread"
next

and then start them

for i as integer = 0 to 5
    variableName & i.tostring" = New Thread(New ParameterizedThreadStart(AddressOf SubOrFunction))"
    variableName & i.tostring".Start(s)

1. How would one accomplish this
2. What is this actually called ( terminology )

Thanks in advance.

回答1:

Typically, when you want to assign names dynamically to objects, it's best to use a dictionary. In the dictionary, you would use the key for the dynamically assigned name and you would use the value as the object that is assigned that name. For instance:

Dim d As New Dictionary(Of String, MyClass)()

'Add objects to dictionary
d("dynamic name 1") = New MyClass()
d("dynamic name 2") = New MyClass()

'Get object from dictionary by name
Dim myObject As MyClass = d("dynamic name 1")

The same method will work well with threads, for instance:

Dim threads As New Dictionary(Of String, Thread)()
Dim variableName = "Thread"
For i As Integer = 0 To 5
    threads(variableName & "(" & i.ToString() & ")") = New Thread()
Next

However, if all you are doing is assigning numeric indexes to them, rather than string names, you could just use a list instead, like this:

Dim threads As New List(Of Thread)()
For i As Integer = 0 To 5
    threads.Add(New Thread())
Next

Then you could get the thread from the list by index like this:

Dim t As Thread = threads(1)

Or, if you have a set number of threads, you could easily use an array:

Dim threads(4) As Thread
For i As Integer = 0 To 5
    threads(i) = New Thread()
Next

回答2:

Create a Dictonary(of String, Thread) so can you easily access them

Dim dictThread as new Dictionary(of String, Thread)
For i as integer = 0 to 5
   dictThread.add("Thread" & i.toString, New Thread(New ParameterizedThreadStart(AddressOf SubOrFunction))
Next

Start 'em

For Each t as Thread in dictThread.Values
   t.Start(WhateverSIs)
Next

Or Start specific thread: dictThread("Thread3").Start(s)

Note: Just written, not tested ;)

来源：https://stackoverflow.com/questions/18533135/how-to-start-multiple-threads-dynamically-by-casting-variable-names-as-object