[VB.NET] errore all'avvio dell' .exe

[SigAlexey]

Ciao a tutti ragazzi!
Pongo un problema (mi sembra dopo aver fatto varie ricerche ma con alcun risultato) comune.

Quando eseguo il "programma" da visual studio funziona correttamente.
Nel momento in cui però avvio l'eseguibile, quindi dalla cartella interna, funziona tutto eccetto certi form.
Ora vi spiego meglio.

Ho questo programma che si connette ad un DB per ricavare ed inserire informazioni.
Se dall'eseguibile utilizzo il form in cui inserisco le informazioni o le leggo va tutto bene.
Nel momento in cui provo ad aprire il form in cui cancello le informazioni, mi esce il seguente errore:

See the end of this message for details on invoking 
just-in-time (JIT) debugging instead of this dialog box.


************** Exception Text **************
System.NullReferenceException: Object reference not set to an instance of an object.
   at WindowsApplication3.CancRicettavb.CancRicettavb_Load(Object sender, EventArgs e) in C:\Users\alex\Documents\Visual Studio 2010\Projects\WindowsApplication3\WindowsApplication3\CancRicettavb.vb:line 30
   at System.Windows.Forms.Form.OnLoad(EventArgs e)
   at System.Windows.Forms.Form.OnCreateControl()
   at System.Windows.Forms.Control.CreateControl(Boolean fIgnoreVisible)
   at System.Windows.Forms.Control.CreateControl()
   at System.Windows.Forms.Control.WmShowWindow(Message& m)
   at System.Windows.Forms.Control.WndProc(Message& m)
   at System.Windows.Forms.ScrollableControl.WndProc(Message& m)
   at System.Windows.Forms.ContainerControl.WndProc(Message& m)
   at System.Windows.Forms.Form.WmShowWindow(Message& m)
   at System.Windows.Forms.Form.WndProc(Message& m)
   at System.Windows.Forms.Control.ControlNativeWindow.OnMessage(Message& m)
   at System.Windows.Forms.Control.ControlNativeWindow.WndProc(Message& m)
   at System.Windows.Forms.NativeWindow.Callback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)




************** Loaded Assemblies **************
mscorlib
    Assembly Version: 4.0.0.0
    Win32 Version: 4.0.30319.18444 built by: FX451RTMGDR
    CodeBase: file:///C:/Windows/Microsoft.NET/Framework/v4.0.30319/mscorlib.dll
----------------------------------------
WindowsApplication3
    Assembly Version: 1.0.0.0
    Win32 Version: 1.0.0.0
    CodeBase: file:///C:/Users/alex/Documents/Visual%20Studio%202010/Projects/WindowsApplication3/WindowsApplication3/bin/Debug/WindowsApplication3.exe
----------------------------------------
Microsoft.VisualBasic
    Assembly Version: 10.0.0.0
    Win32 Version: 11.0.50938.18408 built by: FX451RTMGREL
    CodeBase: file:///C:/Windows/Microsoft.Net/assembly/GAC_MSIL/Microsoft.VisualBasic/v4.0_10.0.0.0__b03f5f7f11d50a3a/Microsoft.VisualBasic.dll
----------------------------------------
System
    Assembly Version: 4.0.0.0
    Win32 Version: 4.0.30319.18408 built by: FX451RTMGREL
    CodeBase: file:///C:/Windows/Microsoft.Net/assembly/GAC_MSIL/System/v4.0_4.0.0.0__b77a5c561934e089/System.dll
----------------------------------------
System.Core
    Assembly Version: 4.0.0.0
    Win32 Version: 4.0.30319.18408 built by: FX451RTMGREL
    CodeBase: file:///C:/Windows/Microsoft.Net/assembly/GAC_MSIL/System.Core/v4.0_4.0.0.0__b77a5c561934e089/System.Core.dll
----------------------------------------
System.Windows.Forms
    Assembly Version: 4.0.0.0
    Win32 Version: 4.0.30319.18408 built by: FX451RTMGREL
    CodeBase: file:///C:/Windows/Microsoft.Net/assembly/GAC_MSIL/System.Windows.Forms/v4.0_4.0.0.0__b77a5c561934e089/System.Windows.Forms.dll
----------------------------------------
System.Drawing
    Assembly Version: 4.0.0.0
    Win32 Version: 4.0.30319.18408 built by: FX451RTMGREL
    CodeBase: file:///C:/Windows/Microsoft.Net/assembly/GAC_MSIL/System.Drawing/v4.0_4.0.0.0__b03f5f7f11d50a3a/System.Drawing.dll
----------------------------------------
System.Configuration
    Assembly Version: 4.0.0.0
    Win32 Version: 4.0.30319.18408 built by: FX451RTMGREL
    CodeBase: file:///C:/Windows/Microsoft.Net/assembly/GAC_MSIL/System.Configuration/v4.0_4.0.0.0__b03f5f7f11d50a3a/System.Configuration.dll
----------------------------------------
System.Xml
    Assembly Version: 4.0.0.0
    Win32 Version: 4.0.30319.18408 built by: FX451RTMGREL
    CodeBase: file:///C:/Windows/Microsoft.Net/assembly/GAC_MSIL/System.Xml/v4.0_4.0.0.0__b77a5c561934e089/System.Xml.dll
----------------------------------------
System.Runtime.Remoting
    Assembly Version: 4.0.0.0
    Win32 Version: 4.0.30319.34108 built by: FX45W81RTMGDR
    CodeBase: file:///C:/Windows/Microsoft.Net/assembly/GAC_MSIL/System.Runtime.Remoting/v4.0_4.0.0.0__b77a5c561934e089/System.Runtime.Remoting.dll
----------------------------------------
System.Data
    Assembly Version: 4.0.0.0
    Win32 Version: 4.0.30319.18408 built by: FX451RTMGREL
    CodeBase: file:///C:/Windows/Microsoft.Net/assembly/GAC_32/System.Data/v4.0_4.0.0.0__b77a5c561934e089/System.Data.dll
----------------------------------------
System.Data.DataSetExtensions
    Assembly Version: 4.0.0.0
    Win32 Version: 4.0.30319.18408 built by: FX451RTMGREL
    CodeBase: file:///C:/Windows/Microsoft.Net/assembly/GAC_MSIL/System.Data.DataSetExtensions/v4.0_4.0.0.0__b77a5c561934e089/System.Data.DataSetExtensions.dll
----------------------------------------
System.Transactions
    Assembly Version: 4.0.0.0
    Win32 Version: 4.0.30319.18408 built by: FX451RTMGREL
    CodeBase: file:///C:/Windows/Microsoft.Net/assembly/GAC_32/System.Transactions/v4.0_4.0.0.0__b77a5c561934e089/System.Transactions.dll
----------------------------------------
System.EnterpriseServices
    Assembly Version: 4.0.0.0
    Win32 Version: 4.0.30319.18408 built by: FX451RTMGREL
    CodeBase: file:///C:/Windows/Microsoft.Net/assembly/GAC_32/System.EnterpriseServices/v4.0_4.0.0.0__b03f5f7f11d50a3a/System.EnterpriseServices.dll
----------------------------------------
System.Numerics
    Assembly Version: 4.0.0.0
    Win32 Version: 4.0.30319.18408 built by: FX451RTMGREL
    CodeBase: file:///C:/Windows/Microsoft.Net/assembly/GAC_MSIL/System.Numerics/v4.0_4.0.0.0__b77a5c561934e089/System.Numerics.dll
----------------------------------------
Microsoft.VisualBasic.PowerPacks.Vs
    Assembly Version: 10.0.0.0
    Win32 Version: 10.0.40219.1
    CodeBase: file:///C:/Windows/assembly/GAC_MSIL/Microsoft.VisualBasic.PowerPacks.Vs/10.0.0.0__b03f5f7f11d50a3a/Microsoft.VisualBasic.PowerPacks.Vs.dll
----------------------------------------


************** JIT Debugging **************
To enable just-in-time (JIT) debugging, the .config file for this
application or computer (machine.config) must have the
jitDebugging value set in the system.windows.forms section.
The application must also be compiled with debugging
enabled.


For example:


<configuration>
    <system.windows.forms jitDebugging="true" />
</configuration>


When JIT debugging is enabled, any unhandled exception
will be sent to the JIT debugger registered on the computer
rather than be handled by this dialog box.

Il fatto strano ma che accomuna i form è che l'errore spunta in tutti i form di cancellazione (perchè ho più tabelle).

Cosa può essere?
Grazie

[SigAlexey]

Nessuno ha una risposta?

[oregon]

Nessuno ha una risposta?

Se non mostri il codice dell'evento che ha generato l'errore, come si fa?

L'evento è indicato nell'errore

Form9_Load

[SigAlexey]

Scusa cosa devo mettere che non ho capito?

Perchè questo errore mi esce solo all'avvio del .exe e non quando lo avvio da Visual Studio...
E quello che ho messo sopra è tutto quello che mi esce!

[oregon]

Scusa cosa devo mettere che non ho capito?

Il codice ... devi mostrare il codice dell'evento Form9_Load dove avviene il problema ... mi sembrava di essere stato chiaro ...

[SigAlexey]

ah ok scusa!

        Me.Left = (Screen.PrimaryScreen.Bounds.Width - Me.Width) / 2
        Me.Top = (Screen.PrimaryScreen.Bounds.Height - Me.Height) / 2


        Timer1.Enabled = True


        ToolStripStatusLabel2.Text = Login.TextBox1.Text.ToString
        ToolStripStatusLabel3.Text = Now.ToString("dd MM YY")
        ToolStripStatusLabel4.Text = TimeString


        MenuP.ApriConnessione()


        Dim comm As OleDb.OleDbCommand = New OleDb.OleDbCommand("select colore From Vernici", MenuP.objconn)
        Dim dr As OleDb.OleDbDataAdapter = New OleDb.OleDbDataAdapter(comm)
        Dim dt As Data.DataTable = New Data.DataTable()
        dr.Fill(dt)


        MenuP.ChiudiConnessione()


        Dim c As Integer = 0


        While (dt(c)(0).ToString <> "")


            ComboBox1.Items.Add(dt(c)(0).ToString)
            c = c + 1


        End While


        If File.Exists("del.log") = False Then


            swIns = File.CreateText(Application.StartupPath & "\del.log")
            swIns.WriteLine("INIZIO FILE DI LOG CANCELLAZIONI")
            swIns.Flush()
            swIns.Close()


        End If

Eccolo

[oregon]

Individua la linea numero 30 e vedi cosa c'è scritto. In quella linea qualcosa non va ...

Per esempio sei sicuro che la SELECT restituisce sicuramente dati?

[SigAlexey]

Tutti i form portano a questo frammento di codice (ovviamente presente in tutti i form che danno errore)

While (dt(c)(0).ToString <> "")                                       *riga indiziata*
 

            ComboBox1.Items.Add(dt(c)(0).ToString)
            c = c + 1


        End While

[SigAlexey]

Però anche se cancello tutto il ciclo continua ad apparirmi l'errore... indicando sempre la stessa riga!

[oregon]

Però anche se cancello tutto il ciclo continua ad apparirmi l'errore... indicando sempre la stessa riga!

Prova ad eliminare selettivamente altre linee per capire.