How can access to COM+ Proxy(s) from ASPX pages

• • Reply

  17 years ago

  by Jackoby

  Jackoby F

  , United States

  Joined 17 years ago

  How can access to COM+ Proxy(s) from ASPX pages
  

  
  

  
  Hi,
  

  
  When I wanted to call COM+ Proxy methods from ASPX pages it returns error but in VB.Net Application it is running
  

  
  correctly. what is the problem?
  

  
  

  
  Source 1 (ASPX page):
  

  
  'Test1.aspx
  '----------------
  

  
  Dim objProxy as New TestComPlus.Class1Class()
  Dim str as Object
  str = "test"
  objProxy.TestMethod(str)
  Response.Write(str)
  

  
  'End of Program
  

  
  in the run time when it reach to objProxy.TestMethod(str) it is returning the following error:
  

  
  QueryInterface for Interface TestComPlus.Class1 failed.
  Exception Details: System.InvalidCastException: QueryInterface for Interface TestComPlus.Class1 failed.
  

  
  

  
  when I wrote the above code in the following format it will show different error message in the same method calling.
  

  
  

  
  

  
  Source 2 (ASPX page):
  

  
  'Test2.aspx
  '----------------
  

  
  Dim objProxy as Object
  objProxy = GetObject("", "TestComPlus.Class1")
  Dim str as Object
  str = "test"
  objProxy.TestMethod(str)
  Response.Write(str)
  

  
  'End of Program
  

  
  in the run time when it reach to objProxy.TestMethod(str) it is returning the following error:
  

  
  Server Error in "/WebApplication3"
  

  
  Object reference not set to an instance of an object.
  

  
  Exception Details: System.NullReferenceException: Object reference not set to an instance of an object.
  

  
  

  
  but it is running simply in an application form without error and it returns the correct answer.
  

  
  Source 3 :
  

  
  

  
  Dim objProxy as New TestComPlus.Class1Class()
  Dim str as Object
  str = "test"
  objProxy.TestMethod(str)
  MessageBox.Show(str)
  

  
  'End of Program
  

  
  

  
  

  
  it is a simple com+ (written in VB) with one method that I wrote the source code here:
  

  
  Public Function TestMethod(ByRef str)
     str = str + "*"
     TestMethod = True
  End Function
  

  
  it is all. if you have any idea please let me know. thank you.
  

  
  Sincerely,
  

  
  Jacoby
  

  
  

  
  

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