VB .Net - 反射：在调用方法之前，从加载的程序集反射的方法执行。为什么？

Question

当我动态加载程序集，然后从它调用一个方法时，我似乎从调用它的方法中的代码之前获取Assembly执行的方法。它并不像我所期望的那样以串行方式执行。任何人都可以点亮一下为什么会发生这种情况。下面是一些代码来说明我所看到的，来自some.dll程序集的代码调用名为PerformLookup的方法。对于测试，我将类似的MessageBox类型输出与“PerformLookup Time：”作为文本。我最终看到的是：

First: "PerformLookup Time: 40:842"

Second: "initIndex Time: 45:873"

Imports System 
Imports System.Data 
Imports System.IO 
Imports Microsoft.VisualBasic.Strings 
Imports System.Reflection 

Public Class Class1 
    Public Function initIndex(indexTable as System.Collections.Hashtable) As System.Data.DataSet 
     Dim writeCode As String 
     MessageBox.Show("initIndex Time: " & Date.Now.Second.ToString() & ":" & Date.Now.Millisecond.ToString()) 
     System.Threading.Thread.Sleep(5000) 
     writeCode = RefreshList() 
    End Function 

    Public Function RefreshList() As String 
     Dim asm As System.Reflection.Assembly 
     Dim t As Type() 
     Dim ty As Type 
     Dim m As MethodInfo() 
     Dim mm As MethodInfo 
     Dim retString as String 
     retString = "" 

     Try 
      asm = System.Reflection.Assembly.LoadFrom("C:\Program Files\some.dll") 
      t = asm.GetTypes() 
      ty = asm.GetType(t(28).FullName) 'known class location 
      m = ty.GetMethods() 
      mm = ty.GetMethod("PerformLookup") 
      Dim o as Object 
      o = Activator.CreateInstance(ty) 
      Dim oo as Object() 
      retString = mm.Invoke(o,Nothing).ToString() 
     Catch Ex As Exception  
     End Try 

     return retString 
    End Function 
End Class 

我添加了一个冲洗声明我写方法的末尾，即使我有一个StreamReader.Close（）调用。相同的结果。下面是我放入的一些调试语句的输出，用于进一步尝试和诊断它。在initIndex我

write(timestamp) 
save(file) 
write(save success) 
write(saved value) 
write(timestamp) 
write(file create/file modified times) 
sleep(5 seconds) 
invoke(assembly method) 
write(timestamp) 

而在装配方法，我有：

write(timestamp) 
sleep(5 seconds) //yes, two 5 second sleeps between write and read 
read(file) 
write(file value) 
write(timestamp) 
write(file create/file write times) 

这里是initIndex日志文件我的输出：

17:732 
True 
A/P 
17:732 
5/17/2010 11:59:30 AM/5/18/2010 7:49:17 AM 
22:748 

这里是从Assembly类输出日志文件：

12:670 
CASH 
17:685 
5/17/2010 11:59:30 AM/5/18/2010 7:41:20 AM 

Answer 1

日期时间并不像您想象的那么精确，您可能会看到这种不完美。

Answer 2

所以你写新的时间回到文件，然后重新读它？你是否正在刷新输出流，以确保数据已写入文件，而不仅仅是缓存用于懒惰写入？