Error When Unzipping File Using GZipStream(magic Number)
Jul 9, 2009unzipping file using GZipStream.Heres the solution but i hope that i don't need to imports another dlls [URL] the zip files i compressed with 7z. and here the code...
[Code]...
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Magic Number Vs Constant?
May 11, 2012I save a lot of settings in an INI file as 1 (enabled) and 0 (disabled), all around the project's module i have this check If setting = 1 then ' do somethingEnd If ' OR If setting = 0 then ' do somethingEnd If
My question, is it good for performance to declare public constants to hold 1 & 0 and use them in such above checks instead of using real number?
In general, if i use value like 8, 9, "", "$", etc... in just two different places, should i declare constant for it?
Unzip File Using GZipStream?
Mar 24, 2011How can i unzip file using GZipStream?
View 4 RepliesGZipStream Zip File Password Protect?
Dec 13, 2010How can i password protect my zip file?
i have the code below i got from the net but the problem is no code to protect file the file
Public Function CompressFile(ByRef file As String, ByRef destination As String) As String
'Make sure user provided a valid file with path
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VS 2008 : GZipStream Extracts Only 1/4 Of The File?
Mar 9, 2010This code uncompresses 1/4 of the gzipped file. & I took it directely from the help file sample function codes.Any idea why is it doing this or how to fix it? gz file is attached below & it is not damaged.Edit: I read some stuff hire & there & found this: tutorial that says that MSDN doesn�t set the size of the array and uses a default size of 4086 bytes. But I have no clue how to implement it into my code.In this gz file there are only around 50 lines but there are files with over 1000 lines. So I tested & indeed this seems to be the problem, because if I increase the buffer(4096) more lines are extracted.
PHP
Imports System
Imports System.Collections.Generic
Imports System.IO
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Unzipping A File On A XP Machine?
Jul 9, 2009I am unzipping a file on a XP machine. to do this i am using the Shell process
For Each setfiles As String In My.Computer.FileSystem.GetFiles(mydesktop, FileIO.SearchOption.SearchTopLevelOnly, "*.zip")
If setfiles.Count = 0 Then
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Sample Code For Unzipping File
Nov 28, 2009I have a vbscript that does the following but I want to do it in vb .net and was hoping someone could post some sample code to get me started. The script does the following. Monitors 2 folders specified in a config file. When a zip file is put in the one of the folders it us automatically unzipped to a working folder and then the zip file is renamed to unzipped-<zip>.zip. I am hoping someone could post a visual studio project or code that might help me get started.
View 4 Replies[2008] Read Contents Of ZIP File (without Unzipping Preferably)?
Mar 5, 2009I need my program to 'take a peek' into a ZIP file and see if it contains a certain file. I need it to do this many times for a large number of files, so I would prefer it without having to unzip the entire zip-file each time, as that would take far too much time (it's a fairly large zip-file of about 250 MB).Also, I don't need the actual file at all. All I need to know is if it exists inside the zip file.
vb.net
If IO.File.Exists("C:FolderIPFile.zipfolder_in_zipfile.jpg") Then
' "file.jpg" exists inside zip-file!
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Magic Numbers - File Header And Footer
Feb 12, 2011For my project, I need to develop an app, which will have MS-SQL db with 4 tables
a>FileHeader
b>FileFooter
c>Extension
d>Detail about the file.
This is all to do with the Magic Numbers, or File header and footer, found in all files. The first 4-byte and last 4-bytes.
Example:
Suppose a word DOC file when read using this app should return and match the values
D0 CF 11 E0
So, how can I read the files using vb.net, fileIO, FileStream/StreamClass/FileReader? I just need to open the file and read the first 4 and last 4 bytes of any given file. And then it should connect back to the SQL database and lookup for the matching values from the tables as I had mentioned. And return a match found or not found.
If File Is An Image Using .Net Framework Not By Checking Magic Numbers
Apr 20, 2011With all the smarts of actually loading images being done by the .net framework, seems like I shouldn't have to repeat it all in my code by checking for magic numbers, or using a hack like this:[code]Am I missing something obvious, like System.Drawing.IsImage(stream)?
View 1 RepliesGet A File Inside A .zip File Without Unzipping The .zip File?
Jan 21, 2010I am trying to create an application that will copy files with a "*.1" extension over to another directory and change the file extension to .tif. The problem is that the *.1 files are located within zip files. Is it possible to copy files out of a zip file without having to extract it? The code I have so far is below. I have only gotten to the point to list all *.zip files found in a specific directory in a listbox. I am really looking to list all *.1 files found within all .zip files in a specific directory. Once they are all listed in the listbox, I will then chose a destination directory, copy them to the destination directory and change the files from a .1 extension to a .TIF extension.
Private Sub Button4_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button4.Click
ListBox1.Items.Clear()
FolderBrowserDialog1.SelectedPath = "C:\"
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C# GZipStream To String?
Aug 12, 2010I am in need of a way to write a GZipStream to a string.I am using:GZipStream Decompress = new GZipStream(inFile, CompressionMode.Decompress)I have tried several methods, but can't figure it out.
View 1 RepliesVS 2008 Unzipping Files?
May 3, 2011im having a problem getting free direct linking file hosting for my updater program to work. im currently trying to use google docs for this but it doesnt support .exe files.what im thinking about doing is zipping it and downloading the zip then unpacking it in the code. anyone have an easy way of doing this or an alternate solution to this problem?
View 1 RepliesVS 2005 - Compressing A Dataset Converted To XML Using The GZipStream Class Added In 2.0
Mar 25, 2009I am compressing a dataset converted to XML using the GZipStream class added in 2.0. There are a few things bothering me about this. Here's the code I am using to decompress the XML file:
Using inFile As New System.IO.FileStream(flnm, IO.FileMode.Open, IO.FileAccess.Read, IO.FileShare.Read)
Dim zStrm As New System.IO.Compression.GZipStream(inFile, IO.Compression.CompressionMode.Decompress)
Dim buff(999) As Byte
[CODE]...
This seems inordinately awkward, as I am taking the stream, reading it out into byte buffers, then writing those byte buffers to a memory stream that is then passed to the dataset.ReadXml() method. The reason for this seems to have to do with what is happening in the line colored red. That line is adding a closing > onto the end of the stream. Without that, ReadXml complains about an unclosed dataset. I found out that the > was missing by writing the stream into a string and pasting the string into WordPad. Without that missing >, it appears that I wouldn't need to be using that memory stream at all, and could simply pass in the GZipStream to ReadXML, but as far as I can tell, it's impossible to look at the GZipStream to be sure that the > is not there, and it may be impossible to add it (I haven't tried).
So why is the > missing? Here's the code used to create the file that is being read into the filestream in the above
VB Using ms As New System.IO.FileStream(flnm, IO.FileMode.OpenOrCreate, IO.FileAccess.Write, IO.FileShare.Write)
Dim zStrm As New System.IO.Compression.GZipStream(ms, IO.Compression.CompressionMode.Compress)
ds.WriteXml(zStrm, XmlWriteMode.WriteSchema)
End Using
The real kicker to all of this is that while I was dissecting the first chunk of code, I added a line to check for cnt<1000. My intention was to see the last buffer that was being written into the memory stream to see whether the final > was actually there, or not. To my surprise, I reached the cnt<1000 twice. That means that one read did not read a full 1000 bytes, but read only 675. The next three or four reads were a full 1000 bytes, then the final read was just a few hundred bytes. It is my understanding that Read will return a full buffer if there are that many bytes left to read, and there were, so why did it return only a partial buffer? That suggests that there might be a hole in my XML, though with a half meg file, it's a bit much to read through it looking for something missing. However, the XML that was returned was turned into a dataset that I then merged into some existing data using code that has been working with uncompressed XML files, and I got an error that I should never have received. That may indicate that the XML was, in fact, missing something, though I will have to study the matter further to figure out whether or not that is the case. My major question has to do with the missing '>' at the very end of the file.
VS 2008 Create An Error Log System Which Will Log All Errors To A Text File With Line Number
Jun 29, 2010How to create an error log system, which will log all errors(caused in my app) to a text file with line number, sub/function in which the error occurred, error details, etc. ?
View 11 RepliesCheck Bad Files While Unzipping Using Pkzip
May 29, 2010I am using PKZIP to unzip my files. I need to know bad files while unziping.How to check the bad files while unzipping using pkzip in vb.net. Sample code for this.
View 5 RepliesVS 2008 Unzipping .zip Files With Progress Bar?
Sep 27, 2010Once again, im stuck, ive searched everywher I do not understand at all the zip extraction libraries
Now what im wanting to do is unzip a file mentioned in a texbox and then a directory mentioned in My.Settings.Directory with a progress bar, with a label that changes text, for example: Unpacking, % unpacked or files that are being unpacked.
VS 2008 - Unzipping Files From Program (Shell32 Functionality)
Mar 20, 2009I want to unzip files from my program, so i'm using the Shell32 functionality like so:
Module Module1
Sub Main()
Dim sc As New Shell32.Shell
Dim srcDir As Shell32.Folder = sc.NameSpace("zippath")
Dim destDir As Shell32.Folder = sc.NameSpace("destinationpath")
Dim items As Shell32.FolderItems = srcDir.Items()
destDir.CopyHere(items, 256)
End Sub
End Module
This theoretically works, but i'm unzipping an 8Gb compressed file and the dialog that pops up says it will be done in 1day, 19hours. This is ridiculous because when I just right click on the file and decompress it from there, it takes only a couple of minutes! I can't imagine what the problem is! I know that the shell process actually spawns its own thread, so I worried at first that my process was exiting before the thread could spawn and added a Thread.Sleep(1000) after destDir.CopyHere() but it had no effect.
Byte Array - Error: Number Of Indices Is Less Than The Number Of Dimensions
Mar 16, 2011Trying to upload a picture file from an online source and store it in a byte array but am having the error: "Number of Indices is less than the number of dimensions in the indexed array".
Dim Bytes() as Byte
Dim Inet1 as System.Net.Webrequest
Late Binding Magic Under .NET Converted To C#?
Nov 22, 2011I should convert some code from VB to C#. Given following lines of VB work (I think only because option is not set to strict):
Dim someProp As SomeType
Try
someProp = CType(SomeInstance, Object).SomeProp
' ...
Due to late binding, this code is possible under VB. Of course, following won't work under C#:
SomeType someProp;
try
{
someProp = ((object)SomeInstance).SomeProp;
// ...
How could I formulate something similar under C#?
Error:When Casting From A Number,the Value Must Be A Number Less Than Infinity?
Jan 8, 2011I am getting the error in the code below ....
Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
Dim prasha As New Person("Prashanthi", "Acharya")
Dim mallika As New Person("Mallika", "Upadhya")
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VS 2008 - Writing A Driver For Magic Mouse In VB
Mar 7, 2010I use the Magic Mouse, it's fantastic in OSX but more so because of MagicPrefs which extends the multi-touch gestures its capable of. I'd like to know if its possible for me to write drivers for the Magic Mouse in VB? to extend it's functionality. Or would this be better suited for C++? I don't even know where to start.
View 4 RepliesVS 2008 UDPclient.send Magic Packet (wol)
Jan 9, 2010I want to make an application which turns on my computer. A Wake-on-Lan application should do the trick. I allready created something which sends data over UDP, i can see that it sends the data (with wireshark) but it does not send the correct data.
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Create A Magic 8 Ball That Would Display Answers Via Array?
Apr 17, 2011The goal in this assignment was to create a Magic 8 Ball that would display answers via array.Here's what I got down so far, now I apologize once again, I forgot most of the stuff so I don't even know if it is REMOTELY close to what it's suppose to be
Public Class Form1
Dim ArrayRes(7) As String
Private Sub btnASK_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnASK.Click
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Designing Magic Square - Scanning Array With Function
Mar 18, 2011I'm designing a 3 x 3 Magic Square, where the 3 x 3 tables are made of up three adjacent list boxes. Upon starting the program, the 3 x 3 square consists only of the character "?" to represent a variable that has yet to be defined. The user will input through text boxes and button presses the characters 1 to 9, replacing the highlighted undefined "?' with the desired number. I'm required to include a Function procedure that can, at any time scan the 3x3 table and return an integer value of -1 if an undefined character "?" is present, a value of 0 if the rows, columns and diagonals do not sum to the same value, or the sum common to all rows columns and diagonals.
To start with I defined a 2D array and undefined.
Dim mSquare(2,2) As String
Dim undefined As String = "?"
Then I used a Sub to set the 3x3 table as undefined which I did not show to save space. Next I used a Sub to update the highlighted characters, allowing only one list box to be selected at a time and which I hope also assigns the the values to the array as they are updated. I removed parts of the code so this post isn't too big.
If lstCol2.SelectedIndex = -1 And lstCol3.SelectedIndex = -1 Then
lstCol1.Items(lstCol1.SelectedIndex) = input
txtInput.Text = ""
End If
For i As Integer = 0 To 2
[Code] .....
What I'm stuck on is the Function design. I'm trying to design something to scan the array, and give back an integer depending on the results, which are to return an integer value of -1 if an undefined character "?" is present, a value of 0 if the rows, columns and diagonals do not sum to the same value, or the sum common to all rows columns and diagonals.
I'm currently trying
Function checkSquare(ByRef mSquare As String) As String
For i As Integer = 0 To 2
[Code] .....
At the moment I keep getting the error "Public Readonly Default Property Chars(index As Integer) As Char". I keep getting an error like this even using a single variable and defining each j individually, and I'm wondering if its possible to pass arrays to functions or do I need to do something else. Is what I'm trying to do even possible? I did a longer method in which I just check all the entries individually but I'm hoping there is a more efficient way. Its my plan B for now.
When Build Project To Create Exe / Want To Include 3d Control Magic.exe Into It
Mar 11, 2010I've used 3d control magic for VB.NET to create shaped forms.When I bulid my project to create an exe, I want to include 3d control magic.exe into it, to be installed automatically in the clients computer.
View 1 Replies.net - Photoshop Like Magic Wand For Selecting Pixels Of A Similar Color?
Sep 15, 2011I need to write some vb.net code that looks at a picture and "removes" the blackish pixels.Here's the scenario. A wound care doctor takes a picture of a persons hand on a flat bed scanner. The nice pink palm print is there but it is surrounded by blackish pictures. I want to make the picture pop by programatically "removing" or recoloring the pixels that are in the blackish range. i.e. the Photoshop magic wand select and delete.I have not code to start off. Hoping for some reference code and not just pcode.
View 1 RepliesCheck If Input To Group Number And Number Of Units Are Correct Input By Making Error Handling Exceptions
Sep 23, 2010Part of my assignment is to check if input to Group Number and Number of Units are correct input by making error handling exceptions...
I have to check the following:
a) group number is neither 501 nor 062
b) number of units are NOT numbers
c) number of units is NOT a positive number
So my first question is, am I checking correctly? 2nd question is, How do I make sure my Exceptions will pertain to their correct respective things (a, b, and c.. above)?
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Error List Displays Only One Error - Maximum Number Of Errors Has Been Exceeded
May 13, 2009I recently upgraded a project from 2003 to 2005, and there were errors in them, but I am unable to view any in the error list. Only one error displays in the list
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Error Codes "Number Of Indices Exceeds The Number Of Dimensions Of The Indexed Array."?
May 19, 2009"Number of indices exceeds the number of dimensions of the indexed array."
and
"Array bounds cannot appear in type specifiers."