Interop.WMPLib problems after updating an project file from VS2008 to VS2010

Question

If I create a new project on VS2010, and add the WMP.dll reference place the WMP control on a blank VB form, build and debug the application it will run just fine.  But if I upgrade a project that already had the WMP.dll reference in it, I cannot debug the application because I gives me this error: 

''An error occurred creating the form. See Exception.InnerException for details.  The error is: Could not load file or assembly 'Interop.WMPLib, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null' or one of its dependencies. An attempt was made to load a program with an incorrect format.''

I removed the reference, and added it again and the same problem.  I also removed the Windows Media Player control from the toolbox and added it again.  What step am I missing to properly upgrade this reference?

Answer 1

Hello idspence,

Thanks for your post.

If you upgrade the project without having the WMP.dll reference in it,  does it run fine?

Best regards,
Liliane
MSDN Subscriber Support in Forum
If you have any feedback on our support, please contact [e-mail]

---

Please mark the replies as answers if they help and unmark them if they provide no help. Welcome to the All-In-One Code Framework! If you have any feedback, please tell us. Thanks

Answer 2

Hello idspence,

Thanks for your post.

If you upgrade the project without having the WMP.dll reference in it,  does it run fine?

Best regards,
Liliane
MSDN Subscriber Support in Forum
If you have any feedback on our support, please contact [e-mail]

---

Please mark the replies as answers if they help and unmark them if they provide no help. Welcome to the All-In-One Code Framework! If you have any feedback, please tell us. Thanks

Even with the reference in the project the application runs fine.  That is only of the Startup Form does not contain a WMP element.  Only when you try to load a form with the WMP element present does this error occur.

Answer 3

I too am facing the same problem. 

If i remove the wmp control and leave the references then the application runs successfully. any help would be appreciated!!!

thanks

heres the exception details

 

System.InvalidOperationException was unhandled

  Message=An error occurred creating the form. See Exception.InnerException for details.  The error is: Could not load file or assembly 'Interop.WMPLib, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null' or one of its dependencies. An attempt was made to load a program with an incorrect format.

  Source= Timer

  StackTrace:

       at Timer.My.MyProject.MyForms.Create__Instance__[T](T Instance) in 17d14f5c-a337-4978-8281-53493378c1071.vb:line 190

       at Timer.My.MyProject.MyForms.get_frmMain()

       at Timer.My.MyApplication.OnCreateMainForm() in C:\Users\Owner\Documents\Visual Studio 2010\Projects\Timer\AudioTimer\My Project\Application.Designer.vb:line 35

       at Microsoft.VisualBasic.ApplicationServices.WindowsFormsApplicationBase.OnRun()

       at Microsoft.VisualBasic.ApplicationServices.WindowsFormsApplicationBase.DoApplicationModel()

       at Microsoft.VisualBasic.ApplicationServices.WindowsFormsApplicationBase.Run(String[] commandLine)

       at Timer.My.MyApplication.Main(String[] Args) in 17d14f5c-a337-4978-8281-53493378c1071.vb:line 81

       at System.AppDomain._nExecuteAssembly(Assembly assembly, String[] args)

       at System.Runtime.Hosting.ApplicationActivator.CreateInstance(ActivationContext activationContext, String[] activationCustomData)

       at Microsoft.VisualStudio.HostingProcess.HostProc.RunUsersAssemblyDebugInZone()

       at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)

       at System.Threading.ThreadHelper.ThreadStart()

  InnerException: System.BadImageFormatException

       Message=Could not load file or assembly 'Interop.WMPLib, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null' or one of its dependencies. An attempt was made to load a program with an incorrect format.

       Source=AxInterop.WMPLib

       FileName=Interop.WMPLib, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null

       FusionLog==== Pre-bind state information ===

LOG: User = Owner-PC\Owner

LOG: DisplayName = Interop.WMPLib, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null

 (Fully-specified)

LOG: Appbase = file:///C:/Users/Owner/Documents/Visual Studio 2010/Projects/Timer/AudioTimer/bin/Debug/

LOG: Initial PrivatePath = NULL

Calling assembly : AxInterop.WMPLib, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null.

===

LOG: This bind starts in default load context.

LOG: Using application configuration file: C:\Users\Owner\Documents\Visual Studio 2010\Projects\Timer\AudioTimer\bin\Debug\ Timer.vshost.exe.Config

LOG: Using machine configuration file from C:\Windows\Microsoft.NET\Framework64\v2.0.50727\config\machine.config.

LOG: Policy not being applied to reference at this time (private, custom, partial, or location-based assembly bind).

LOG: Attempting download of new URL file:///C:/Users/Owner/Documents/Visual Studio 2010/Projects/Timer/AudioTimer/bin/Debug/Interop.WMPLib.DLL.

ERR: Failed to complete setup of assembly (hr = 0x8007000b). Probing terminated.

 

       StackTrace:

            at AxWMPLib.AxWindowsMediaPlayer.AttachInterfaces()

            at System.Windows.Forms.AxHost.GetOcxCreate()

            at System.Windows.Forms.AxHost.TransitionUpTo(Int32 state)

            at System.Windows.Forms.AxHost.CreateHandle()

            at System.Windows.Forms.Control.CreateControl(Boolean fIgnoreVisible)

            at System.Windows.Forms.Control.CreateControl(Boolean fIgnoreVisible)

            at System.Windows.Forms.AxHost.EndInit()

            at Timer.frmMain.InitializeComponent() in C:\Users\Owner\Documents\Visual Studio 2010\Projects\Timer\AudioTimer\Form1.Designer.vb:line 2034

            at Timer.frmMain..ctor() in C:\Users\Owner\Documents\Visual Studio 2010\Projects\Timer\AudioTimer\Form1.vb:line 20

       InnerException: 

Answer 4

Inranup,

Will you not hijack other persons threads to tell your problems, simply create your own problem.

Create your own questions.

It is for me unclear now if this happens after an update like stated or that you have always had this.

Hijacking others persons thread is not done in Microsoft forums.

 

---

Success
Cor