Any sample code that could read the file signature and return the value of the signature so that it could be display to the user interface of the program in vb.net? Furthermore I would like to know that how is the coding to do the comparison of file signature and extension so that it could identified whether its a wrong extension or not.
View 1 RepliesI am making a tool in which I want a button to do the following job.e.g;A=(1,2,3) Signature Guide B=(1,2,4) File Signature In short I am making an antivirus, every thing is done, except "clean" button.I want that the clean button should do the following job.
read the file (B) signature and compare it with signature guide(A), if the file (B) signature is different from signature file (A) then repair the file changing its signature just like its present in signature guide..
I'm planning on using the Smart Device Framework 2.3 to use the signature control panel in a Windows Mobile 5 application using the compact framework 3.5.
The control has the option to save the signature as either a byte array of points, or as a bitmap. Now seeing as I want to store the signature in a sql compact database, I guess the byte array is going to be better. The trouble is, I'm not sure how to render that in a full WinForms application after I've transferred it back to the desktop.
I need to show the signature on a report, so it would need to be an image I could link/embed into the report.
how can i capture a signature from an Electronic Signature Pad and store it in database. is there any particular api or it can be captured just like capturing an image from a WebCam. Is it manufacturer specific?
View 2 RepliesI was trying to use a GetAsyncKeyState code but each time I run the program an error occers where
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'A call to PInvoke function 'WindowsApplication1!WindowsApplication1.Form1::GetAsyncKeyState' has unbalanced the stack. This is likely because the managed PInvoke signature does not match the unmanaged target signature. Check that the calling convention and parameters of the PInvoke signature match the target unmanaged signature.' The full code is in timer with (1) time interval
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I am able to detect the infected hash value, can I delete or remove this infected hash value from this file?Delete A File Signature?
View 1 RepliesI have a signature box that does not allow me to save in jpeg format.I am using code:
'SigBoxCustSign.Save("C:Test2.bmp", SigBoxLib.SigBoxFileFormat.BMP)
Dim img As New Bitmap("C:Test2.bmp")
'img.Save("C:Test2.jpg", ImageFormat.Jpeg)
[code]....
here know how to do to sign a file with certificate chain and crl embedded?I don't have ideia how to do that.
View 5 RepliesI'm going to do my graduate dissertation this year .My title is develop a forensic tools which is able to detect and analyse the file signature then compare it with the extension.If the extension is wrong match with the file signature then there is a feature in the tools that would revert the wrong file extension to its original state.The problem is there is little information could be found online that shows the code library or function that could enable me to program the above mentioned feature.Could it be implemented on the vb.net or i should do it on C#?Any sample code that could peform the file signature with the extension and also correct the file extension according to the signature in vb?
View 12 RepliesI'm trying to take a resultset, store in a class then retrieve the complete record for a given value. For example, the recordset has AnalystID (Unique), LastName, FirstName. I want to be able to pass the AnalystID and return the name. I need the ability to look up either last or firstname by analystID throughout the program. Here's what I have so far. I'm not sure I'm even headed in the right direction.
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I have the code below (found on forums) that should read the string "34,56,23,74,69" starting from the first address of another process till the end. However when I start the project I receive this error :"PInvoke restriction: cannot return variants." With Search Engine for example, the string is found, displayed and changed without any problems. Right now I have a subroutine that searches the string but only if I put the right memory address, and unfortunately the address changes almost every day.
Imports VB = Microsoft.VisualBasic
Imports System.Runtime.InteropServices
Public Class Form1
Inherits System.Windows.Forms.Form
[Code] .....
I am developing a vb.net app that should read cell values from excel. However, it is not returning any results and I thought that it would be really simple. I have imported all the references viz. Microsoft Excel 12.0 Object Library.
Following is the function in my class file which should read the excel file
Dim mobjApp As Excel.Application
Dim mobjWB As Excel.Workbook
Dim mobjSheet As Excel.Worksheet
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I am working on a project in VB 2008 and need it to do this:Read first line from text file (using Openfile)Enter line into textbox on formDo some other codeThen Read second linefrom text fileEnter line into same text boxand loop until we have gone through text fileI am not sure how to read line by line from text file then enter it in textbox. I can open the Openfile and get the filename and everything, but I just am not sure how to read from it or enter that line into the textbox.Here is what I have, its not much but its a start:
Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click
Dim FileReader As StreamReader
[code]....
I need to write data to a file, preferably in binary format, but I am unaccustomed with the concept. Where's the easiest place to get the basics? I could come here with a specific need, but I'm at the point right now where I am more willing to work within the confines of keeping it simple.
Here's what I know:
1. how to open a new file
2. how to specify the record length
3. how to close the file
Some specific questions:
Does the record length have to be constant throughout the file?
Can I read the nth record without reading the whole file?
I'm using Visual Basic express 2008.The application I am working on is the first major project I have ever undertook with visual basics. The application is a launcher for a private server for world of warcraft.I have a menu bar that pulls the file path of the wow.exe and puts it in a hidden textbox, I then have another option that saves this text to c:wowexe.txt. All of this works GREAT!
How can I read the .txt file to end and return the information stored in the .txt file to this line of code.
Dim RetVal
RetVal = Shell("This is where I need the data from the .txt file to be seen", 1)
If your wondering why I don't just type in the path of the .exe, it's simple, not everyone installs World of Warcraft on the C drive.
I have Project i need to recovery file System . And some information who Create that file , deleting , replace , Modifying . I need also return any file delete or replace .
View 2 RepliesI want to be able to able to read the dimensions of a TIF image without loading the entire file.
PS Using Visual Basic 2008 on Vista64.
how to loop through a zip file and return all the file extensions in the zipped file.
View 2 RepliesI want to perform two hashing operations concurrently on a single file, without reading the file twice. Is there some way to share the FileStream between two synchronized hashing threads? For example:
Dim Stream As New IO.FileStream("...", IO.FileMode.Open)
Dim HashA, HashB As Byte()
Dim A = New System.Threading.Thread(Sub()
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Maybe some way of caching a stream? Trouble is, I don't want the entire file in memory at once (it could be many gigabytes in size) and I don't want the file read more than once, due to speed issues. I want the file cached only sufficiently to ensure that both threads can work.For example, suppose at some point in time, thread A had read 100k of the file, but thread B had only read 20k of the file. The portion of the file between 20k and 100k should be cached; but then progressively forgotten as thread B catches up. Then again, if thread B is too slow, we might still end up with hundreds of megabytes being cached.Maybe thread A should be made to wait while thread B catches up. Maybe the ReadByte() function of the stream should block for a while if one of the threads is too far behind?
I have a checked list box that is populated with the text from a text file. I started off with this code:
Dim FileToLoad As String
FileToLoad = TextBox3.Text
Dim fs As FileStream = New FileStream(FileToLoad, FileMode.Open)
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friend of mine has no HTML knowledge so I'm attempting to write a program that replaces certain parts of a html file to suit his needs.I've edited the HTML file and marked certain parts with "tags" like this:
#IMAGEURL1# I have a textbox where he can copy + paste an image URL and hopefully the #IMAGEURL1# is replaced with the contents of the textbox.
So can someone please enlighten me to-as how to open a HTML file (there's no textbox to display the contents just yet, I'll add one if needed), find the specified text and then replace it with whats in a textbox.
I am trying to import a TAB (NOt comma) delimited text file into a DataGridView. The following code works fine if I have a comma separated file. All I have to do is change the FMT to "Delimited".It just does not work with FMT=TabDelimited. All columns are read into single datatable column. The text file is ANSI text and I have double checked to make sure Tabs are tabs and not spaces, even exported a sample Tab Delimited file from Excel.Can this even be done using Text Driver? [code]
View 2 RepliesHow do I play a WAV file while the computer is reading aloud a text file? It uses Text to Speech synthesis and I need a laughter wav to play when the computer comes across something funny in the line.
View 2 RepliesI've tried everything here, but the Amazon Load Balancer API just will not accept my signature.
Whatever I try, I get a "403 SignatureDoesNotMatch" response. I'm probably missing something obvious, but having spent hours trying to figure out what that is, I'm at the end of my tether.
Here's my code:
Public Sub DeregisterInstanceFromLoadBalance(ByVal strServerID As String)
Dim strURL As String
strURL = "http://elasticloadbalancing.amazonaws.com/?"
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I'm new to Visual Basic. I'm trying to get this code to read a .txt file line by line. If the only thing that the line says is "B" it should add one to the intTotalBoys integer and so on with G for Girls, F for Fathers, and M for Mothers. I'm not sure why it won't work. [code]
View 4 RepliesI would like to read from file, and ignore lines that start with --. I know how to read line by line but i just need to ignore those lines.
View 3 RepliesSo I need to write out an object to a text file as well as read in objects from text files.How do I accomplish this? This is the code i've used to read and write just simple lines of text. Is there a small modification to this or just a different function i use to read in an entire object?
Code:
Dim path As String
path = "Security.txt"
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I have just recently been using VB 2010 after using VB5. I have noticed a lot of changes. The problem I have is that I wish to open and save text files to and from arrays in the background. I've attached what I would do in VB5. I have searched around, but all the examples I find use a Textbox instead of an array. Can anyone show me how I can do this with VB 2010?
View 1 RepliesI got a log file (Log.txt) a timer and a RichTextBox1.Text The timer is opening the log file again and again every milisecond here the code:
Code:
Okay that keeps the track of my log file inside my richtextbox , but there is a big problem there. My richtextbox slows down hard if the log file gets too big.. Sometimes it kicks me out of the program and in taskbar it says Program Not Responding..
I wanted to know if there is a method to read a bigger Log file with out having such issues. (It mostly happens when log file goes over 13000 characters)
this code takes about 30 mins and high cpu usage, what is the problem
Do
strLine = objReader.ReadLine()
If strLine Is Nothing Then
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