COM problem

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  • Martinez
    #1

    COM problem

    Hello
    I try declare

    Dim db as New BtDatabase()
    and execute metod
    db.open(par1,pa r2,par3)

    but i get error :

    System.NullRefe renceException was unhandled
    Message="Object reference not set to an instance of an object."
    Source="Microso ft.VisualBasic"
    StackTrace:
    at
    Microsoft.Visua lBasic.Compiler Services.LateBi nding.InternalL ateCall(Object
    o, Type objType, String name, Object[] args, String[] paramnames,
    Boolean[] CopyBack, Boolean IgnoreReturn)
    at
    Microsoft.Visua lBasic.Compiler Services.NewLat eBinding.LateCa ll(Object
    Instance, Type Type, String MemberName, Object[] Arguments, String[]
    ArgumentNames, Type[] TypeArguments, Boolean[] CopyBack, Boolean
    IgnoreReturn)
    at ForteWB.Wczytyw anieWyciagu.Wcz ytywanieWyciagu _Load(Object
    sender, EventArgs e) in C:\Documents and Settings\Marcin \Moje dokumenty
    \Visual Studio 2005\Projects\F orteWB\ForteWB
    \WczytywanieWyc iagu.vb:line 210
    at System.EventHan dler.Invoke(Obj ect sender, EventArgs e)
    at System.Windows. Forms.Form.OnLo ad(EventArgs e)
    at System.Windows. Forms.Form.OnCr eateControl()
    at System.Windows. Forms.Control.C reateControl(Bo olean
    fIgnoreVisible)
    at System.Windows. Forms.Control.C reateControl()
    at System.Windows. Forms.Control.W mShowWindow(Mes sage& m)
    at System.Windows. Forms.Control.W ndProc(Message& m)
    at System.Windows. Forms.Scrollabl eControl.WndPro c(Message& m)
    at System.Windows. Forms.Container Control.WndProc (Message& m)
    at System.Windows. Forms.Form.WmSh owWindow(Messag e& m)
    at System.Windows. Forms.Form.WndP roc(Message& m)
    at
    System.Windows. Forms.Control.C ontrolNativeWin dow.OnMessage(M essage& m)
    at
    System.Windows. Forms.Control.C ontrolNativeWin dow.WndProc(Mes sage& m)
    at System.Windows. Forms.NativeWin dow.DebuggableC allback(IntPtr
    hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)
    at
    System.Windows. Forms.UnsafeNat iveMethods.Send Message(HandleR ef hWnd,
    Int32 msg, Int32 wParam, Int32 lParam)
    at System.Windows. Forms.Form.SetV isibleCore(Bool ean value)
    at System.Windows. Forms.Control.s et_Visible(Bool ean value)
    at
    System.Windows. Forms.Applicati on.ThreadContex t.RunMessageLoo pInner(Int32
    reason, ApplicationCont ext context)
    at
    System.Windows. Forms.Applicati on.ThreadContex t.RunMessageLoo p(Int32
    reason, ApplicationCont ext context)
    at System.Windows. Forms.Applicati on.Run(Applicat ionContext
    context)
    at
    Microsoft.Visua lBasic.Applicat ionServices.Win dowsFormsApplic ationBase.OnRun ()
    at
    Microsoft.Visua lBasic.Applicat ionServices.Win dowsFormsApplic ationBase.DoApp licationModel()
    at
    Microsoft.Visua lBasic.Applicat ionServices.Win dowsFormsApplic ationBase.Run(S tring[]
    commandLine)
    at ForteWB.My.MyAp plication.Main( String[] Args) in 17d14f5c-
    a337-4978-8281-53493378c1071.v b:line 81
    at System.AppDomai n.nExecuteAssem bly(Assembly assembly,
    String[] args)
    at System.Runtime. Hosting.Manifes tRunner.Run(Boo lean
    checkAptModel)
    at System.Runtime. Hosting.Manifes tRunner.Execute AsAssembly()
    at
    System.Runtime. Hosting.Applica tionActivator.C reateInstance(A ctivationContex t
    activationConte xt, String[] activationCusto mData)
    at
    System.Runtime. Hosting.Applica tionActivator.C reateInstance(A ctivationContex t
    activationConte xt)
    at
    Microsoft.Visua lStudio.Hosting Process.HostPro c.RunUsersAssem blyDebugInZone( )
    at System.Threadin g.ThreadHelper. ThreadStart_Con text(Object
    state)
    at System.Threadin g.ExecutionCont ext.Run(Executi onContext
    executionContex t, ContextCallback callback, Object state)
    at System.Threadin g.ThreadHelper. ThreadStart()


    Why i can't execute metod open on object db??

    Marcin

    Tags: None
    • Cor Ligthert [MVP]
      #2
      Re: COM problem

      Hi Marcin,

      Probably in par1, par2, par3 has an object to be instanced what is not done.

      However for not AdoNet databases the newsgroup

      micorosoft.publ ic.ado.data is probably much better,

      Cor


      "Martinez" <martinez@szcze cinek.net.plsch reef in bericht
      news:1177877720 .095417.286730@ y80g2000hsf.goo glegroups.com.. .
      Hello
      I try declare
      >
      Dim db as New BtDatabase()
      and execute metod
      db.open(par1,pa r2,par3)
      >
      but i get error :
      >
      System.NullRefe renceException was unhandled
      Message="Object reference not set to an instance of an object."
      Source="Microso ft.VisualBasic"
      StackTrace:
      at
      Microsoft.Visua lBasic.Compiler Services.LateBi nding.InternalL ateCall(Object
      o, Type objType, String name, Object[] args, String[] paramnames,
      Boolean[] CopyBack, Boolean IgnoreReturn)
      at
      Microsoft.Visua lBasic.Compiler Services.NewLat eBinding.LateCa ll(Object
      Instance, Type Type, String MemberName, Object[] Arguments, String[]
      ArgumentNames, Type[] TypeArguments, Boolean[] CopyBack, Boolean
      IgnoreReturn)
      at ForteWB.Wczytyw anieWyciagu.Wcz ytywanieWyciagu _Load(Object
      sender, EventArgs e) in C:\Documents and Settings\Marcin \Moje dokumenty
      \Visual Studio 2005\Projects\F orteWB\ForteWB
      \WczytywanieWyc iagu.vb:line 210
      at System.EventHan dler.Invoke(Obj ect sender, EventArgs e)
      at System.Windows. Forms.Form.OnLo ad(EventArgs e)
      at System.Windows. Forms.Form.OnCr eateControl()
      at System.Windows. Forms.Control.C reateControl(Bo olean
      fIgnoreVisible)
      at System.Windows. Forms.Control.C reateControl()
      at System.Windows. Forms.Control.W mShowWindow(Mes sage& m)
      at System.Windows. Forms.Control.W ndProc(Message& m)
      at System.Windows. Forms.Scrollabl eControl.WndPro c(Message& m)
      at System.Windows. Forms.Container Control.WndProc (Message& m)
      at System.Windows. Forms.Form.WmSh owWindow(Messag e& m)
      at System.Windows. Forms.Form.WndP roc(Message& m)
      at
      System.Windows. Forms.Control.C ontrolNativeWin dow.OnMessage(M essage& m)
      at
      System.Windows. Forms.Control.C ontrolNativeWin dow.WndProc(Mes sage& m)
      at System.Windows. Forms.NativeWin dow.DebuggableC allback(IntPtr
      hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)
      at
      System.Windows. Forms.UnsafeNat iveMethods.Send Message(HandleR ef hWnd,
      Int32 msg, Int32 wParam, Int32 lParam)
      at System.Windows. Forms.Form.SetV isibleCore(Bool ean value)
      at System.Windows. Forms.Control.s et_Visible(Bool ean value)
      at
      System.Windows. Forms.Applicati on.ThreadContex t.RunMessageLoo pInner(Int32
      reason, ApplicationCont ext context)
      at
      System.Windows. Forms.Applicati on.ThreadContex t.RunMessageLoo p(Int32
      reason, ApplicationCont ext context)
      at System.Windows. Forms.Applicati on.Run(Applicat ionContext
      context)
      at
      Microsoft.Visua lBasic.Applicat ionServices.Win dowsFormsApplic ationBase.OnRun ()
      at
      Microsoft.Visua lBasic.Applicat ionServices.Win dowsFormsApplic ationBase.DoApp licationModel()
      at
      Microsoft.Visua lBasic.Applicat ionServices.Win dowsFormsApplic ationBase.Run(S tring[]
      commandLine)
      at ForteWB.My.MyAp plication.Main( String[] Args) in 17d14f5c-
      a337-4978-8281-53493378c1071.v b:line 81
      at System.AppDomai n.nExecuteAssem bly(Assembly assembly,
      String[] args)
      at System.Runtime. Hosting.Manifes tRunner.Run(Boo lean
      checkAptModel)
      at System.Runtime. Hosting.Manifes tRunner.Execute AsAssembly()
      at
      System.Runtime. Hosting.Applica tionActivator.C reateInstance(A ctivationContex t
      activationConte xt, String[] activationCusto mData)
      at
      System.Runtime. Hosting.Applica tionActivator.C reateInstance(A ctivationContex t
      activationConte xt)
      at
      Microsoft.Visua lStudio.Hosting Process.HostPro c.RunUsersAssem blyDebugInZone( )
      at System.Threadin g.ThreadHelper. ThreadStart_Con text(Object
      state)
      at System.Threadin g.ExecutionCont ext.Run(Executi onContext
      executionContex t, ContextCallback callback, Object state)
      at System.Threadin g.ThreadHelper. ThreadStart()
      >
      >
      Why i can't execute metod open on object db??
      >
      Marcin
      >

        Comment

        • Martinez
          #3
          Re: COM problem

          On 30 Kwi, 06:12, "Cor Ligthert [MVP]" <notmyfirstn... @planet.nl>
          wrote:
          Hi Marcin,
          >
          Probably in par1, par2, par3 has an object to be instanced what is not done.
          >
          However for not AdoNet databases the newsgroup
          >
          micorosoft.publ ic.ado.data is probably much better,
          >
          Cor
          >
          "Martinez" <marti...@szcze cinek.net.plsch reef in berichtnews:117 7877720..095417 .286730@y80g200 0hsf.googlegrou ps.com...
          >
          >
          >
          Hello
          I try declare
          >
          Dim db as New BtDatabase()
          and execute metod
          db.open(par1,pa r2,par3)
          >
          but i get error :
          >
          System.NullRefe renceException was unhandled
          Message="Object reference not set to an instance of an object."
          Source="Microso ft.VisualBasic"
          StackTrace:
          at
          Microsoft.Visua lBasic.Compiler Services.LateBi nding.InternalL ateCall(Object
          o, Type objType, String name, Object[] args, String[] paramnames,
          Boolean[] CopyBack, Boolean IgnoreReturn)
          at
          Microsoft.Visua lBasic.Compiler Services.NewLat eBinding.LateCa ll(Object
          Instance, Type Type, String MemberName, Object[] Arguments, String[]
          ArgumentNames, Type[] TypeArguments, Boolean[] CopyBack, Boolean
          IgnoreReturn)
          at ForteWB.Wczytyw anieWyciagu.Wcz ytywanieWyciagu _Load(Object
          sender, EventArgs e) in C:\Documents and Settings\Marcin \Moje dokumenty
          \Visual Studio 2005\Projects\F orteWB\ForteWB
          \WczytywanieWyc iagu.vb:line 210
          at System.EventHan dler.Invoke(Obj ect sender, EventArgs e)
          at System.Windows. Forms.Form.OnLo ad(EventArgs e)
          at System.Windows. Forms.Form.OnCr eateControl()
          at System.Windows. Forms.Control.C reateControl(Bo olean
          fIgnoreVisible)
          at System.Windows. Forms.Control.C reateControl()
          at System.Windows. Forms.Control.W mShowWindow(Mes sage& m)
          at System.Windows. Forms.Control.W ndProc(Message& m)
          at System.Windows. Forms.Scrollabl eControl.WndPro c(Message& m)
          at System.Windows. Forms.Container Control.WndProc (Message& m)
          at System.Windows. Forms.Form.WmSh owWindow(Messag e& m)
          at System.Windows. Forms.Form.WndP roc(Message& m)
          at
          System.Windows. Forms.Control.C ontrolNativeWin dow.OnMessage(M essage& m)
          at
          System.Windows. Forms.Control.C ontrolNativeWin dow.WndProc(Mes sage& m)
          at System.Windows. Forms.NativeWin dow.DebuggableC allback(IntPtr
          hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)
          at
          System.Windows. Forms.UnsafeNat iveMethods.Send Message(HandleR ef hWnd,
          Int32 msg, Int32 wParam, Int32 lParam)
          at System.Windows. Forms.Form.SetV isibleCore(Bool ean value)
          at System.Windows. Forms.Control.s et_Visible(Bool ean value)
          at
          System.Windows. Forms.Applicati on.ThreadContex t.RunMessageLoo pInner(Int32
          reason, ApplicationCont ext context)
          at
          System.Windows. Forms.Applicati on.ThreadContex t.RunMessageLoo p(Int32
          reason, ApplicationCont ext context)
          at System.Windows. Forms.Applicati on.Run(Applicat ionContext
          context)
          at
          Microsoft.Visua lBasic.Applicat ionServices.Win dowsFormsApplic ationBase.OnRun ­()
          at
          Microsoft.Visua lBasic.Applicat ionServices.Win dowsFormsApplic ationBase.DoApp ­licationModel( )
          at
          Microsoft.Visua lBasic.Applicat ionServices.Win dowsFormsApplic ationBase.Run(S ­tring[]
          commandLine)
          at ForteWB.My.MyAp plication.Main( String[] Args) in 17d14f5c-
          a337-4978-8281-53493378c1071.v b:line 81
          at System.AppDomai n.nExecuteAssem bly(Assembly assembly,
          String[] args)
          at System.Runtime. Hosting.Manifes tRunner.Run(Boo lean
          checkAptModel)
          at System.Runtime. Hosting.Manifes tRunner.Execute AsAssembly()
          at
          System.Runtime. Hosting.Applica tionActivator.C reateInstance(A ctivationContex ­t
          activationConte xt, String[] activationCusto mData)
          at
          System.Runtime. Hosting.Applica tionActivator.C reateInstance(A ctivationContex ­t
          activationConte xt)
          at
          Microsoft.Visua lStudio.Hosting Process.HostPro c.RunUsersAssem blyDebugInZone( ­)
          at System.Threadin g.ThreadHelper. ThreadStart_Con text(Object
          state)
          at System.Threadin g.ExecutionCont ext.Run(Executi onContext
          executionContex t, ContextCallback callback, Object state)
          at System.Threadin g.ThreadHelper. ThreadStart()
          >
          Why i can't execute metod open on object db??
          >
          Marcin- Ukryj cytowany tekst -
          >
          - Poka¿ cytowany tekst -
          Ok, but par1,par2,par3 is string.
          par1="Driver=.. .;Server=...;Da tabase=...;"
          par2="user"
          par3="password"

          I add db to watch and od i

            Comment

            • Cor Ligthert [MVP]
              #4
              Re: COM problem

              Martinez,

              I have the idea that the problem as nothing to do with the commands

              Dim db as New BtDatabase()
              db.open(par1,pa r2,par3)

              Can you outcomment them and run again?

              Cor


              "Martinez" <martinez@szcze cinek.net.plsch reef in bericht
              news:1177908194 .722025.313150@ y80g2000hsf.goo glegroups.com.. .
              On 30 Kwi, 06:12, "Cor Ligthert [MVP]" <notmyfirstn... @planet.nl>
              wrote:
              Hi Marcin,
              >
              Probably in par1, par2, par3 has an object to be instanced what is not
              done.
              >
              However for not AdoNet databases the newsgroup
              >
              micorosoft.publ ic.ado.data is probably much better,
              >
              Cor
              >
              "Martinez" <marti...@szcze cinek.net.plsch reef in
              berichtnews:117 7877720.095417. 286730@y80g2000 hsf.googlegroup s.com...
              >
              >
              >
              Hello
              I try declare
              >
              Dim db as New BtDatabase()
              and execute metod
              db.open(par1,pa r2,par3)
              >
              but i get error :
              >
              System.NullRefe renceException was unhandled
              Message="Object reference not set to an instance of an object."
              Source="Microso ft.VisualBasic"
              StackTrace:
              at
              Microsoft.Visua lBasic.Compiler Services.LateBi nding.InternalL ateCall(Object
              o, Type objType, String name, Object[] args, String[] paramnames,
              Boolean[] CopyBack, Boolean IgnoreReturn)
              at
              Microsoft.Visua lBasic.Compiler Services.NewLat eBinding.LateCa ll(Object
              Instance, Type Type, String MemberName, Object[] Arguments, String[]
              ArgumentNames, Type[] TypeArguments, Boolean[] CopyBack, Boolean
              IgnoreReturn)
              at ForteWB.Wczytyw anieWyciagu.Wcz ytywanieWyciagu _Load(Object
              sender, EventArgs e) in C:\Documents and Settings\Marcin \Moje dokumenty
              \Visual Studio 2005\Projects\F orteWB\ForteWB
              \WczytywanieWyc iagu.vb:line 210
              at System.EventHan dler.Invoke(Obj ect sender, EventArgs e)
              at System.Windows. Forms.Form.OnLo ad(EventArgs e)
              at System.Windows. Forms.Form.OnCr eateControl()
              at System.Windows. Forms.Control.C reateControl(Bo olean
              fIgnoreVisible)
              at System.Windows. Forms.Control.C reateControl()
              at System.Windows. Forms.Control.W mShowWindow(Mes sage& m)
              at System.Windows. Forms.Control.W ndProc(Message& m)
              at System.Windows. Forms.Scrollabl eControl.WndPro c(Message& m)
              at System.Windows. Forms.Container Control.WndProc (Message& m)
              at System.Windows. Forms.Form.WmSh owWindow(Messag e& m)
              at System.Windows. Forms.Form.WndP roc(Message& m)
              at
              System.Windows. Forms.Control.C ontrolNativeWin dow.OnMessage(M essage& m)
              at
              System.Windows. Forms.Control.C ontrolNativeWin dow.WndProc(Mes sage& m)
              at System.Windows. Forms.NativeWin dow.DebuggableC allback(IntPtr
              hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)
              at
              System.Windows. Forms.UnsafeNat iveMethods.Send Message(HandleR ef hWnd,
              Int32 msg, Int32 wParam, Int32 lParam)
              at System.Windows. Forms.Form.SetV isibleCore(Bool ean value)
              at System.Windows. Forms.Control.s et_Visible(Bool ean value)
              at
              System.Windows. Forms.Applicati on.ThreadContex t.RunMessageLoo pInner(Int32
              reason, ApplicationCont ext context)
              at
              System.Windows. Forms.Applicati on.ThreadContex t.RunMessageLoo p(Int32
              reason, ApplicationCont ext context)
              at System.Windows. Forms.Applicati on.Run(Applicat ionContext
              context)
              at
              Microsoft.Visua lBasic.Applicat ionServices.Win dowsFormsApplic ationBase.OnRun ­()
              at
              Microsoft.Visua lBasic.Applicat ionServices.Win dowsFormsApplic ationBase.DoApp ­licationModel( )
              at
              Microsoft.Visua lBasic.Applicat ionServices.Win dowsFormsApplic ationBase.Run(S ­tring[]
              commandLine)
              at ForteWB.My.MyAp plication.Main( String[] Args) in 17d14f5c-
              a337-4978-8281-53493378c1071.v b:line 81
              at System.AppDomai n.nExecuteAssem bly(Assembly assembly,
              String[] args)
              at System.Runtime. Hosting.Manifes tRunner.Run(Boo lean
              checkAptModel)
              at System.Runtime. Hosting.Manifes tRunner.Execute AsAssembly()
              at
              System.Runtime. Hosting.Applica tionActivator.C reateInstance(A ctivationContex ­t
              activationConte xt, String[] activationCusto mData)
              at
              System.Runtime. Hosting.Applica tionActivator.C reateInstance(A ctivationContex ­t
              activationConte xt)
              at
              Microsoft.Visua lStudio.Hosting Process.HostPro c.RunUsersAssem blyDebugInZone( ­)
              at System.Threadin g.ThreadHelper. ThreadStart_Con text(Object
              state)
              at System.Threadin g.ExecutionCont ext.Run(Executi onContext
              executionContex t, ContextCallback callback, Object state)
              at System.Threadin g.ThreadHelper. ThreadStart()
              >
              Why i can't execute metod open on object db??
              >
              Marcin- Ukryj cytowany tekst -
              >
              - Poka¿ cytowany tekst -
              Ok, but par1,par2,par3 is string.
              par1="Driver=.. .;Server=...;Da tabase=...;"
              par2="user"
              par3="password"

              I add db to watch and od i


                Comment

                • Martinez
                  #5
                  Re: COM problem

                  On 30 Kwi, 10:21, "Cor Ligthert [MVP]" <notmyfirstn... @planet.nl>
                  wrote:
                  Martinez,
                  >
                  I have the idea that the problem as nothing to do with the commands
                  >
                  Dim db as New BtDatabase()
                  db.open(par1,pa r2,par3)
                  >
                  Can you outcomment them and run again?
                  >
                  Cor
                  >
                  I don't understand, can you explain me that ??

                  Marcin

                    Comment

                    • Cor Ligthert [MVP]
                      #6
                      Re: COM problem

                      -Dim db as New BtDatabase()
                      -db.open(par1,pa r2,par3)

                      "Martinez" <martinez@szcze cinek.net.plsch reef in bericht
                      news:1177927315 .182575.293890@ q75g2000hsh.goo glegroups.com.. .
                      On 30 Kwi, 10:21, "Cor Ligthert [MVP]" <notmyfirstn... @planet.nl>
                      wrote:
                      >Martinez,
                      >>
                      >I have the idea that the problem as nothing to do with the commands
                      >>
                      >Dim db as New BtDatabase()
                      >db.open(par1,p ar2,par3)
                      >>
                      >Can you outcomment them and run again?
                      >>
                      >Cor
                      >>
                      I don't understand, can you explain me that ??
                      >
                      Marcin
                      >

                        Comment

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