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From: Roidy on 31 May 2010 08:56 I have a function that reads a file but fails if I pass it a network device name instead of an ip address eg:- ReadFunction("\\NAS\Myfolder\Myfile.txt") <--- Fails ReadFunction("\\192.168.2.2\Myfolder\Myfile.txt") <--- Works So how do I convert a network devices name to it's ip address? ie. Convert \\NAS\ to \\192.168.2.2\ Thanks Robert
From: Armin Zingler on 31 May 2010 10:58 Am 31.05.2010 14:56, schrieb Roidy: > I have a function that reads a file but fails if I pass it a network device > name instead of an ip address eg:- > > ReadFunction("\\NAS\Myfolder\Myfile.txt") <--- Fails > ReadFunction("\\192.168.2.2\Myfolder\Myfile.txt") <--- Works > > So how do I convert a network devices name to it's ip address? > ie. Convert \\NAS\ to \\192.168.2.2\ Try this: (passing "NAS") System.Net.Dns.GetHostByName(ByVal String) As System.Net.IPHostEntry Does it fail, too? -- Armin
From: Roidy on 31 May 2010 11:55 Thanks Armin, VB complains that GetHostByName is obsolete and tells you to use GetHostEntry, which works perfectly:- Dim hostname As System.Net.IPHostEntry = System.Net.Dns.GetHostEntry("NAS") Dim ipaddress() As System.Net.IPAddress = hostname.AddressList Now it just an easy task to write a function to strip out the network device name from the path and replace it with the resulting IP address. Thanks Robert "Armin Zingler" <az.nospam(a)freenet.de> wrote in message news:eoljMHNALHA.348(a)TK2MSFTNGP06.phx.gbl... > Am 31.05.2010 14:56, schrieb Roidy: >> I have a function that reads a file but fails if I pass it a network >> device >> name instead of an ip address eg:- >> >> ReadFunction("\\NAS\Myfolder\Myfile.txt") <--- Fails >> ReadFunction("\\192.168.2.2\Myfolder\Myfile.txt") <--- Works >> >> So how do I convert a network devices name to it's ip address? >> ie. Convert \\NAS\ to \\192.168.2.2\ > > > Try this: (passing "NAS") > > System.Net.Dns.GetHostByName(ByVal String) As System.Net.IPHostEntry > > Does it fail, too? > > > -- > Armin >
From: Roidy on 31 May 2010 12:18 This is what I knocked together to check the path to see if it's network path and then replace the device name with it's IP address. Seems to work, can you see any problems I might face using this? or is there a better way? Public Function PathFixer(ByVal path As String) As String If path.StartsWith("\\") Then ' Check to see if it's a network path Dim output As String Dim splits() As String = path.Substring(2, path.Length - 2).Split("\") Dim hostname As System.Net.IPHostEntry = System.Net.Dns.GetHostEntry(splits(0)) Dim ips() As System.Net.IPAddress = hostname.AddressList output = path.Remove(2, splits(0).Length) Return output.Insert(2, ips(0).ToString) Else Return path End If End Function Thanks Robert "Roidy" <roidy.parnell(a)ntlworld.com> wrote in message news:0_QMn.5693$QF7.3830(a)hurricane... > Thanks Armin, > > VB complains that GetHostByName is obsolete and tells you to use > GetHostEntry, which works perfectly:- > > Dim hostname As System.Net.IPHostEntry = > System.Net.Dns.GetHostEntry("NAS") > Dim ipaddress() As System.Net.IPAddress = hostname.AddressList > > Now it just an easy task to write a function to strip out the network > device name from the path and replace it with the resulting IP address. > > Thanks > Robert > > > "Armin Zingler" <az.nospam(a)freenet.de> wrote in message > news:eoljMHNALHA.348(a)TK2MSFTNGP06.phx.gbl... >> Am 31.05.2010 14:56, schrieb Roidy: >>> I have a function that reads a file but fails if I pass it a network >>> device >>> name instead of an ip address eg:- >>> >>> ReadFunction("\\NAS\Myfolder\Myfile.txt") <--- Fails >>> ReadFunction("\\192.168.2.2\Myfolder\Myfile.txt") <--- Works >>> >>> So how do I convert a network devices name to it's ip address? >>> ie. Convert \\NAS\ to \\192.168.2.2\ >> >> >> Try this: (passing "NAS") >> >> System.Net.Dns.GetHostByName(ByVal String) As System.Net.IPHostEntry >> >> Does it fail, too? >> >> >> -- >> Armin >> >
From: Armin Zingler on 1 Jun 2010 03:19 Am 31.05.2010 18:18, schrieb Roidy: > This is what I knocked together to check the path to see if it's network > path and then replace the device name with it's IP address. Seems to work, > can you see any problems I might face using this? or is there a better way? If it works fine for you, it's ok. :-) Though I wonder why your "ReadFunction" works with the IP but not with the host name, while resolving the host name before using GetHostEntry seems to work. What does 'ReadFunction" do with the string? Apart from this: - A possible problem is that the host name can not be resolved. I can't test the situation because my provider seems to redirect all unknown host names to the same IP. - always enable Option Strict - make the function Shared > Public Function PathFixer(ByVal path As String) As String > If path.StartsWith("\\") Then ' Check to see if it's a network path > Dim output As String > Dim splits() As String = path.Substring(2, path.Length - > 2).Split("\") > Dim hostname As System.Net.IPHostEntry = > System.Net.Dns.GetHostEntry(splits(0)) > Dim ips() As System.Net.IPAddress = hostname.AddressList > output = path.Remove(2, splits(0).Length) > Return output.Insert(2, ips(0).ToString) > Else > Return path > End If > End Function -- Armin
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