CODEWITHSUNDEEP
vb.netapimethods.net-assembly
aaronmallen
aaronmallen

Reputation: 1438

Returning Assembly Version Numbers from a different application

Let me preface this question by saying I am fairly new to the concept of Assemblies. I am trying to create a method with in a namespace I have called API. The methods look like this: 

Partial Public Class AppInfo

    ' This function will return the VersionMajor Element of the Assembly Version
    Function VersionMajor() As String
        Dim txt As String = Assembly.GetExecutingAssembly.GetName.Version.Major.ToString()
        If txt.Length > 0 Then
            Return txt
        Else
            Return String.Empty
        End If
    End Function

    ' This function will return the VersionMinor Element of the Assembly Version
    Function VersionMinor() As String
        Dim txt As String = Assembly.GetExecutingAssembly.GetName.Version.Minor.ToString()
        If txt.Length > 0 Then
            Return txt
        Else
            Return String.Empty
        End If
    End Function

    ' This function will return the VersionPatch Element of the Assembly Version
    Function VersionPatch() As String
        Dim txt As String = Assembly.GetExecutingAssembly().GetName().Version.Build.ToString()
        If txt.Length > 0 Then
            Return txt
        Else
            Return String.Empty
        End If
    End Function

    ' This function will return the entire Version Number of the Assembly Version
    Function Version() As String
        Dim Func As New AppInfo
        Dim txt As String = VersionMajor() + "." + VersionMinor() + "." + VersionPatch()
        If txt.Length > 0 Then
            Return txt
        Else
            Return String.Empty
        End If
    End Function

End Class

I have other projects within the same solution that call the API as an additional reference. What I'd like to accomplish is say I have a project that references the API project called Test. In the home controller of test I have a view data that calls the Version method. Like this:

Function Index() As ActionResult
  Dim func As New API.AppInfo
  ViewData("1") = func.Version
  Return View()
End Function

I'd like the viewdata to return the Version number of the Test assembly, but instead this returns the API Assembly version. What am I doing wrong here?

Upvotes: 1

Views: 2649

Answers (1)

Konrad Kokosa
Konrad Kokosa

Reputation: 16878

According to MSDN, Assembly.GetExecutingAssembly:

Gets the assembly that contains the code that is currently executing.

and it is always API assembly, because it is place when AppInfo.Version is defined and executed.

What you want is to get information about calling assembly, meaning assembly that called your function AppInfo.Version. You can get it by similar method Assembly.GetCallingAssembly:

Returns the Assembly of the method that invoked the currently executing method.

Note: In your code Version is calling VersionPatch etc. internally which results in internal assembly call. It would be better that Version use GetCallingAssembly directly.

Note 2: Read carefully about method inlinig in the GetCallingAssembly documentation provided above and decorate your Version method with MethodImplOptions.NoInlining attribute to avoid inlining.

Upvotes: 2

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