Tape Drive Help [modified] - .NET (Core and Framework) Discussion Boards

I'll continue with thanks
in net if we upload any file using file upload control,it won't ask for any
protection. I need to apply password when i click on upload control.No one can open open or download
with out knowing that password.Thank u once again for your consideration.

Cheer,
MAHESH.K

So the file isn't password protected at all - you're the one doing the protecting and you want to require a password. Right?
Now that's easy.

Last modified: 14mins after originally posted -- fixed typo

MaheshSelva wrote:
No one can open open or download
with out knowing that password.

Now that is different from what you seemed to be asking for.

Basically, you want a web application to provide password protection so that no one can download the file unless they are already authenticated with the site and authorised to do so.

You may want to look at Forms Authentication[^]. You then want to look at using an ASPX page to stream the file. Something like this: http://forums.asp.net/t/1263188.aspx[^], but with an authorisation check before it actually streams anything out.

User group: Scottish Developers
Blog: Can Open... Worms? Everywhere!
Quote: Man who stand on hill with mouth open wait long time for roast duck to drop in.

Can we create a 3D project in VB.Net?
If we can, please express me any project or some codes...
thank you Blush | :O

Do not re post in multiple Forums.Try this
3D Projects in VB.Net[^]

so that I can send audio samples to my mate.

It needs to be able to handle large files, most likely <4GB. I'll probably be using a client/server approach, but I haven't done much beyond basic network programming.

What I'd really like to know is what protocol and which .NET libraries I should use? I've looked at a few books to try and get an overview, and the most obvious candidate is ftp, but all I've found is how to connect to an existing ftp server, and not how to program one.

I'd also like a few recommendations for some good networking books, preferably .NET focused, although I would also appreciate some more general networking books that go into some detail about networking protocols.

Found an article on here( I always seem to find things just after I've stopped looking for them, or when I'm looking for something else)

Sending Files using TCP[^]

This should be enough to get me going.

Hi,

I am using the Fire Streamer tape drive emulator. I have a simulated tape drive and a simulated tape (a file). I can open a handle to the tape drive and determine that it uses variable block size. I can set the block size of the tape properly. I use msgbox to verify that this is working, But when it comes to reading or writing to the tape I get "incorrect function" if I use stream.write or stream.read or if I use the win32api ReadFile and WriteFile appear to work but they always read or write 0 bytes.

Any help would be appreciated. Start with the button4 click method below which calls write...

p.s. I create m_stream when I get a handle to the tape with createfile(not shown) as a synchronous stream.

Here is a section of code: I have bolded some statements.

Private Sub write(ByVal startpos As Long, ByVal lstream As Byte())
        Dim numberofBlocks As System.UInt32
        numberofBlocks = GetBlocksNumber(lstream.Length)
        TapeSeek(startpos)
        Dim arrayToWrite(numberofBlocks * BlockSize() - 1) As Byte
        Array.Copy(lstream, arrayToWrite, lstream.Length)
        m_stream.Write(arrayToWrite, 0, arrayToWrite.Length)
        m_stream.Flush()
        REM  Dim nbr As System.Int32
        REM nbr = 0
        REM retval = WriteFile(m_handleValue, arrayToWrite, 512, nbr, Nothing)
    End Sub

    Private Sub Button4_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button4.Click        
        Dim selecteddrive As String
        selecteddrive = "\\.\" + ComboBox1.SelectedItem.ToString
        TapeLoad(selecteddrive)
        Dim mediainfo As New DRIVE_INFO
        Dim msize As Integer
        Dim ptr As System.IntPtr
        Dim ptr2 As System.IntPtr
        Dim ptr3 As System.IntPtr
        Dim mediasize2 As New TAPE_MEDIA_INFO
        Dim mediasize As New TAPE_SET_MEDIA_PARAMETERS
        ptr = IntPtr.Zero
        msize = Marshal.SizeOf(mediainfo)
        ptr = Marshal.AllocHGlobal(msize)
        Dim deleteold As Boolean
        deleteold = True
        Marshal.StructureToPtr(mediainfo, ptr, deleteold)
        retval = GetTapeParameters(m_handleValue, GET_TAPE_DRIVE_INFORMATION, msize, ptr)
        Marshal.PtrToStructure(ptr, mediainfo)
        If mediainfo.FeaturesLow And TAPE_DRIVE_VARIABLE_BLOCK Then
            ptr2 = IntPtr.Zero
            msize = Marshal.SizeOf(mediasize)
            ptr2 = Marshal.AllocHGlobal(msize)
            mediasize.BlockSize = mediainfo.MaximumBlockSize
            Marshal.StructureToPtr(mediasize, ptr2, deleteold)
            retval = SetTapeParameters(m_handleValue, SET_TAPE_MEDIA_INFORMATION, ptr2)
            MsgBox("Setting Variable Tape Block Size to Maximum Value of: " + Str(mediainfo.MaximumBlockSize) + " Bytes")
            Marshal.PtrToStructure(ptr2, mediasize)
            Dim myblocksize As System.Int32
            myblocksize = BlockSize()
        End If
        MsgBox("Using Maximum Block Size of: " + Str(mediainfo.MaximumBlockSize) + " Bytes")
        Marshal.FreeHGlobal(ptr)
        Marshal.FreeHGlobal(ptr2)
        Marshal.FreeHGlobal(ptr3)
        Dim mystream(BlockSize() - 1) As Byte
        mystream(1) = 99
        mystream(511) = 99
        write(101, mystream)
        TapeDriveClose()
    End Sub

Thanks, Keiichicom

modified on Tuesday, July 7, 2009 6:05 PM

It is extremely unlikely that anyone will bother to read through that horribly formatted pile.

If you want help, please edit your post, surround the code with <pre>your code</pre> tags, remove anything not directly related to the problem, and format it properly. You know indentation etc. You might be better cutting the code from your editor and pasting it between the tags, that way your existing formatting will be preserved.

Even if you had formatted it properly there is just too much code there for most people to bother reading it.

Henry Minute

Do not read medical books! You could die of a misprint. - Mark Twain
Girl: (staring) "Why do you need an icy cucumber?"
“I want to report a fraud. The government is lying to us all.”

Thanks for your advice, Henry. You are right , it was one big mess to read. I have made the changes and it should be easier to read now. Please help if you can.

Appreciated, Keiichicom

Hello friends,

can i get client ip address at which my application running.I want capture that address coz of restrict from frauds. This form is very helpful for freshers like me.Thanks in Advance. Confused | :confused:

With Regards,
MAHESH.K

Is it a web or windows application?

Web application

http://msdn.microsoft.com/en-us/library/system.web.httprequest.userhostaddress(VS.71).aspx[^]

only two letters away from being an asset

Thank u friend.

Hi I'm trying to develop an application that can detect when a LAN cable is plugged in/unplugged(mind you only LAN cable,should not apply to a Wireless LAN being switched on/off). I did my research and am trying to do it through WMI. The code is as follows but doesn't seem to work. It seems as my event handler isn't handling the events caught by the event watcher.Help!

code:

Imports System.Management
Public Class Form1
Friend WithEvents mew As ManagementEventWatcher
Sub New()

Dim myMS As New ManagementScope("\\.\root\cimv2")
myMS.Connect()
If myMS.IsConnected Then
MsgBox("Connected")
mew = New ManagementEventWatcher("select * from __InstanceModificationEvent within 1 where targetinstance ISA ""Win32_NetworkAdapter""")
mew.Start()
End If

End Sub
Private Sub arrived(ByVal sender As Object, ByVal e As System.Management.EventArrivedEventArgs) Handles mew.EventArrived
Dim mbo, obj As ManagementBaseObject
mbo = CType(e.NewEvent, ManagementBaseObject)
obj = CType(mbo("TargetInstance"), ManagementBaseObject)
MsgBox(obj("Name") + ":" + obj("ConnectionStatus"))
MsgBox(e.Context.ToString)
End Sub
End Class

Check this out http://msdn.microsoft.com/hi-in/magazine/cc301850(en-us).aspx[^]

Vasudevan Deepak Kumar
Personal Homepage
Tech Gossips

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But I have promises to keep,
And miles to go before I sleep,
And miles to go before I sleep!

Well the SensAPI has an IsNetworkAlive function that is supposed to be really slow.Also it checks for network availability. What I want is to be able to detect when a user unplugs a network cable form his tower. The way Windows detects it(although not always accurately) and shows a balloon saying "Network cable unplugged". Is there any event I could use? And the code that I posted works fine when one disables/enables from "dialup and network connections" but not when the cable is manually unplugged. ??? If there is any unmanaged API that I could use, that would be halpful too. Thanks Smile | :)

Hello frnds.

im developing an application in c#.net for burning a dvd using IMAPI.
can anyone help me with its code !!!

also in my ui for the application..
how can i display the data of the selected path(data to be burned on the dvd) and its size in a listbox or in any other control???

plzzz help....

thanking you in advance...

mukul

I think this article will be helpful
Burning and Erasing CD/DVD/Blu-ray Media with C# and IMAPI2[^]

Hi Guys,

I'm starting a process from inside an Installer component that should auto start the app just installed. However, the process starts up as a SYSTEM process, rather than the current logged in user. This is causing a number of problems.

I've tried using the ProcessStartInfo.LoadUserProfile as true, and UseShellExecute as false, but this still doesn't seem to change the process starting under the SYSTEM user.

Does anyone else have any ideas?

Ideally, I'd like to avoid having to enter a password. I'd hoped the HKEY_CURRENT_USER setting would have sorted that out ok.

Regards

Tris

-------------------------------

Carrier Bags - 21st Century Tumbleweed.

modified on Friday, July 3, 2009 8:07 AM

HEllo friends,
i come with a question. Can i get dollar values for my website?if yes then How can i get that factor against Rupees.

Thank in Advance.
Confused | :confused:

Try this link or google it.

Free Exchanges - Add Currency Conversion to your web site - for free[^]

thank u kkarthik200
Keep Rocks

noticed the strange behavior of Databinding to ToolstripComboBox.Combobox when it is being added to ToolstripDropdown or Contextmenu. Normally I'm binding SQL data to ToolstripcomboBox.Combobox by following code.

Me.tspcbxTest.ComboBox.ValueMember = "ID"
Me.tspcbxTest.ComboBox.DisplayMember = "Column_to_Dispaly"
Me.tspcbxTest.ComboBox.FormattingEnabled = True
Me.tspcbxTest.ComboBox.DataSource = Me.Table1BindingSource
Me.Table1TableAdapter.Fill(Me.DataSet1.Table1)

Though it works perfect on ToolstripcomboBox(es) on ToolStrip or MenuStrip, failed on ToolStripSpiltButton (or) ToolStripDropdown (or) Contextmenu.

Thanking in advance.
Please! Frown | :(