Check if Service Exists?

[Lucas Tam]

Hi all,

If I create a serviceControll er like:

srvController = New ServiceControll er("Fubar")

serviceControll er will be created regardless if the service exists or not.
It will only throw an exception if I access the properties of the
serviceControll er.

Is there a way to check that the service actually exists before creating
it?

Thanks.

--
Lucas Tam (REMOVEnntp@rog ers.com)
Please delete "REMOVE" from the e-mail address when replying.
http://members.ebay.com/aboutme/coolspot18/

[Darrell Wesley]

RE: Check if Service Exists?

DOn't know if this the correct way or not but it's what one of our programs
is doing to see if a Service is installed.

'
' Check to see if VNC is installed
'
Dim scServices() = ServiceControll er.GetServices( )
Dim i As Integer = 0

While i < scServices.Leng th
'MessageBox.Sho w(scServices(i) .DisplayName)
If scServices(i).D isplayName = "VNC Server" Then
m_bVNC = True
End If
i = i + 1
End While


If m_bVNC Then

'
' Check to see if VNC is already running, If so indecate
that VNC is running
'
Try

If m_VNC Is Nothing Then
m_VNC = New ServiceControll er("VNC Server")
End If


m_VNC.Refresh()

If m_VNC.Status <> ServiceControll erStatus.Stoppe d Then
tbVnc.ImageInde x = 7
tbVnc.Text = "VNC - ON"
End If

Catch exp As Exception
MsgBox(m_VNC.Se rviceName & " is in state:" &
m_VNC.Status.To String() & vbNewLine & _
"Could not start service")

Finally
m_VNC.Dispose()
m_VNC = Nothing
End Try

Else
tbVnc.Enabled = False

End If


"Lucas Tam" wrote:
[color=blue]
> Hi all,
>
> If I create a serviceControll er like:
>
> srvController = New ServiceControll er("Fubar")
>
> serviceControll er will be created regardless if the service exists or not.
> It will only throw an exception if I access the properties of the
> serviceControll er.
>
> Is there a way to check that the service actually exists before creating
> it?
>
> Thanks.
>
> --
> Lucas Tam (REMOVEnntp@rog ers.com)
> Please delete "REMOVE" from the e-mail address when replying.
> http://members.ebay.com/aboutme/coolspot18/
>[/color]

[Lucas Tam]

RE: Check if Service Exists?

"=?Utf-8?B?RGFycmVsbCB XZXNsZXk=?="
<DarrellWesley@ discussions.mic rosoft.com> wrote in
news:5FF845E6-2CF6-474B-938B-B0288CB20A7F@mi crosoft.com:
[color=blue]
> DOn't know if this the correct way or not but it's what one of our
> programs is doing to see if a Service is installed.
>
> '
> ' Check to see if VNC is installed
> '
> Dim scServices() = ServiceControll er.GetServices( )
> Dim i As Integer = 0
>
> While i < scServices.Leng th
> 'MessageBox.Sho w(scServices(i) .DisplayName)
> If scServices(i).D isplayName = "VNC Server" Then
> m_bVNC = True
> End If
> i = i + 1
> End While[/color]

Thank you - I was hoping to avoid looping through all my services. I was
sort of expecting that .NET would throw an error if it tried to create
an non-existing service.

i.e. New ServiceControll er("NoSuchServi ce")

But it doesn't.

In anycase, the GetServices method way will work just fine for me.

Thank you : )


--
Lucas Tam (REMOVEnntp@rog ers.com)
Please delete "REMOVE" from the e-mail address when replying.
http://members.ebay.com/aboutme/coolspot18/

[Darrell Wesley]

RE: Check if Service Exists?

DOn't know if this the correct way or not but it's what one of our programs
is doing to see if a Service is installed.

'
' Check to see if VNC is installed
'
Dim scServices() = ServiceControll er.GetServices( )
Dim i As Integer = 0

While i < scServices.Leng th
'MessageBox.Sho w(scServices(i) .DisplayName)
If scServices(i).D isplayName = "VNC Server" Then
m_bVNC = True
End If
i = i + 1
End While


If m_bVNC Then

'
' Check to see if VNC is already running, If so indecate
that VNC is running
'
Try

If m_VNC Is Nothing Then
m_VNC = New ServiceControll er("VNC Server")
End If


m_VNC.Refresh()

If m_VNC.Status <> ServiceControll erStatus.Stoppe d Then
tbVnc.ImageInde x = 7
tbVnc.Text = "VNC - ON"
End If

Catch exp As Exception
MsgBox(m_VNC.Se rviceName & " is in state:" &
m_VNC.Status.To String() & vbNewLine & _
"Could not start service")

Finally
m_VNC.Dispose()
m_VNC = Nothing
End Try

Else
tbVnc.Enabled = False

End If


"Lucas Tam" wrote:
[color=blue]
> Hi all,
>
> If I create a serviceControll er like:
>
> srvController = New ServiceControll er("Fubar")
>
> serviceControll er will be created regardless if the service exists or not.
> It will only throw an exception if I access the properties of the
> serviceControll er.
>
> Is there a way to check that the service actually exists before creating
> it?
>
> Thanks.
>
> --
> Lucas Tam (REMOVEnntp@rog ers.com)
> Please delete "REMOVE" from the e-mail address when replying.
> http://members.ebay.com/aboutme/coolspot18/
>[/color]

[Lucas Tam]

RE: Check if Service Exists?

"=?Utf-8?B?RGFycmVsbCB XZXNsZXk=?="
<DarrellWesley@ discussions.mic rosoft.com> wrote in
news:5FF845E6-2CF6-474B-938B-B0288CB20A7F@mi crosoft.com:
[color=blue]
> DOn't know if this the correct way or not but it's what one of our
> programs is doing to see if a Service is installed.
>
> '
> ' Check to see if VNC is installed
> '
> Dim scServices() = ServiceControll er.GetServices( )
> Dim i As Integer = 0
>
> While i < scServices.Leng th
> 'MessageBox.Sho w(scServices(i) .DisplayName)
> If scServices(i).D isplayName = "VNC Server" Then
> m_bVNC = True
> End If
> i = i + 1
> End While[/color]

Thank you - I was hoping to avoid looping through all my services. I was
sort of expecting that .NET would throw an error if it tried to create
an non-existing service.

i.e. New ServiceControll er("NoSuchServi ce")

But it doesn't.

In anycase, the GetServices method way will work just fine for me.

Thank you : )


--
Lucas Tam (REMOVEnntp@rog ers.com)
Please delete "REMOVE" from the e-mail address when replying.
http://members.ebay.com/aboutme/coolspot18/