Extra Low Values Between Characters On File Write?
Mar 28, 2011
I've been asked to re-write an application that was written sometime ago by another programmer. This application reads data from a database table, massages it, and then writes out the results to a text file that is later shipped off to another company. When I run my new application, it generates a file that, according to the byte count, is twice the size of the file output from the old application. However, to look at the two files with note-pad they look identical. I found that by using 'Ultra-edit' that the new records have a low-value byte hex '00' between each real character.
VS2010 (SP1) / .NET4 on Windows XP Pro Im having a slight issue with my password hashing function. The following function hashes the supplied password using SHA512 and returns a Base64 string.
I have been writing an application for our company that writes information to an inf file. However, when other programs use this file, it seems to crash. Now, the same application in VBA does not have this problem.
I am calling the textwriter Dim oWriter As TextWriter = My.Computer.FileSystem.OpenTextFileWriter(StrProjectInfPath, False); which seems to add in extra characters on the top line.
I'm new to VB.net and have only a few projects under my belt. This one has me stumped!! I need to open a file and search its contents hex byte by byte. (Similar to Hex editor). On finding a particular value I need to replace it with a set hex value then write and close the file. So far I have only managed to read / write the ascii equivilant.
I have several textboxes and one combobox in which I would like them to have them placed in a file, but I have run into several problems while doing it. I am taking a beginning course and the book doesn't seem to explain things to well.
1. How can I let the user enter a file name after the data and button has been clicked
2.How do get I get a information from the combobox to grab the text within the selected item to the file
3.How to I write the entered text value to the file like using the notepad file?[code]..
I'm trying to add some extra key/value pairs to a combo box using VB.NET. The initial item list is generated from a hashtable, which contains a collection of objects.I've managed to add the extra values to the box using the Add method, however I now run into problems when reading back the selected item from the combo box because some list items are objects, while others are strings.
My best option seems to be to load the initial data as key/value pairs by looping through the hashtable, however this doesn't seem to be working too well either because I'm still getting errors.I'm getting frustrated because it's taking me hours to do something that should take 5 minutes!
i have a small program to run through a log file and extract data from it which works, but the array it puts out has a blank value before and after the actual data values, and it confuses me why that happens, i dont really understand why and was hoping someone here knew! the parts of the code related are below
Dim rgxSessionStart As New Regex("^Session Start: [A-Z][a-z][a-z] ([A-Z][a-z][a-z]) (dd) dd:dd:dd (dddd)") Dim substrings() As String substrings = rgxSessionStart.Split(LineIn)
a sample line that it would match is Session Start: Sun Aug 22 00:00:00 2010 which WORKS, but the values of the array are "","Aug","22","2010","". so its not a critical problem because i can still get the data from it, but those blank values are puzzling and i feel like maybe im doing something wrong with the syntax or method for them to be there.
I need to write values, mostly doubles into a text file in VB.NET. I ported the code from VB6, but the performance of the VB6 write#fileID, vars) in VB.NET, is very bad, it introduces a delay of about one hour. I have tried out the streamwrite, and its performance is good; it's actually faster than VB6 write.
I am using the write(string) method for the streamwriter, and I am concatenating the values using variable names as follows: streamwriter.write(var1 &","& var2 &","&....&","& var n &","). This version of write enables me to have more than one variable written to file per statement. The problem that I have is that the content of the file is incorrect, unlike the one produced by the slow VB6 write in VB.NET.
Is there a better way of achieving this requirement; preferably using the streamwriter? I cannot use the streamwriter.write(double), becuase I'll have to use multiple lines as I am writing about 800 vars in convergence test loops resulting in a total of just over 2 million writes.
Been trying to get somewhere with this in another thread, but no such look, just keep getting reffered back to the same documentation... If I understood the documentation, I would have fixed it by now:
vb.net Private Sub MakeiSuitePwdFile() Dim text As String =
what im trying to do and what i have done so far is probably a little backwards not sure sure how to id it any other way.when the user generates an error because a particular file doenst exist ive got my dialoge box to generate an .txt file for each file it errors on, so that the administrator can check and update missing files as an when - shouldnt be many files missing in the first place, should just be new product ranges or item just launched.what im stuck on is:
1. is there a better way
2. how do i open a .txt file and add the extra lines to it, so i re use the file but keeping the previous data.
Public Sub WriteTextFile(ByVal SourceToWrite As String, ByVal LocationToWrite As String) Dim file As System.IO.StreamWriter IO.File.Delete(LocationToWrite)
[Code].....
This is a module I made to write to a .txt file. Every time it adds a new line with null value. wouldn't really bother me but it adds but then something that only suppose to have like 3 lines in it ends up with 5000 over time, anyone know how to not add that extra line while writing file?
I have an array called lines() which is basically an array indicating which lines to read from a file. for example lines(1) = 0 means 'read the first line from the file', lines(2) = 4 means 'read the 5th line from the file' (counting from 0 not 1) The program first reads the file (which has a lot of random lines) so it can identify which lines match my criteria. The way I store the line positions is this:
For i = 0 to noOfLines -1 'total num of lines in file If count = match Then 'this is my match criteria lines(x) = i 'store the line in the array
I know how to declare a variable, a function, to write a string of characters or numbers (I still looking in tutorials and depict from there what i need to know) but...WHAT I DONT KNOW is how to USE them? At "what" or "how" are you thinking when you make a program? I try for SOME LOooNG TIME to understand but I think im too stupid to understand from pages on the net (or i dont find THAT tutorial who can explain right for me).I try a lot of programing languages starting with pascal,c,c++,darkbasic,alice, Visual-c,c#,c++,basic,php,even assembler, some programing zones in Excel and Word but from all of this i cant manage to understand the life behind the words.
I have a multiline textbox from which I create a single string[code]...
What I'd like to do is write this to a DB as-is by adding wholeThing as a parameter using to SqlCommand.Parameters.AddWithValue, but all of my painstakingly-inserted newlines go away (or appear to).
I saw this and was hoping I didn't need to concern myself with CHAR(nnn) SQL stuff.
I have been having problems with creating a download list of files for a downloader and was getting unexplained "File Does Not Exist" returns. My .avi files were returning found but but .exe and .txt files were getting the not exists.
I have now found by pulling in the whole directory and examining the file contents that my .exe files are showing ".exe.exe". My .txt files are showing ".txt.rtf". Wow, browsing the file directory in Server 2008 only shows a single extension. I don't see an option to display the extension as a column, just the "type". My directory looks like this:
Name Type File1.exe Application File2.txt Rich Text Document File3.avi AVI File
I had renamed some of these files, maybe I just cannot rename files. I will try using originals ans see if I am ok. Maybe I need to rename the offending files without the displayed extensions. Is this just something weird with the server browser?
Basically I have a VB.net word processor application, With a; Rich Text Box Header Label(as system.windows.forms.label) Footer Label(as system.windows.forms.label) The printing is no problem, but the problem I am having is saving the header and footer label's text into the RTF file and also loading these into the header and footer labels.
Need to enter characters into a label box as input that should display wingdings as output in a text box.How do you write code in VB to convert characters (ABC) from a label box to wingdings in a text box?
I am writing a program that will read and write to a file using the My.Computer.Filesystem namespace, and when I append my data file with the code shown below under SaveFile subroutine, it sometimes places extra ControlChars.Newline at the end of the appended text. Sometimes it places one extra newline, and sometimes it adds 3-6 newlines. I have tried everything I can think of to make it add just one newline at the end of each append, as I will be using the newline char to flag each entry on retrieval. I am working out some algorithms in this project to use in a project that will keep track of data in a file using csv format(just practicing saving/retrieving data from a file). The extra newline characters that are added will become a problem when I start to sort the data to display. my xSaveButton click event:
Private Sub xSaveButton_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles xSaveButton.Click Dim boolAppendData As Boolean If My.Computer.FileSystem.FileExists("myData.dat") = True Then
I'm an undergraduate student from Singapore University, would like to enquire you on how to convert character codes to ASCII codes using visual basic. regarding the codes on how to build it as I need it for my semestral project
I need to write an application for receiving data (ascii characters) from microcontroller through the serial port in three separate parts. I've created three RichTextBoxes, but I do not know which commands I need to type. In first textbox I need to receive one byte... next six bytes need to be placed in second text box, and finally last seven bytes need to be placed in third textbox.
I have a trouble making this code work. When executed, it just creates a correct (with the correct name) file with the extension .txt but the the actual text inside .
Imports System.IO Public Class Form1
Public mytext As String
[code]...
The strange thing is that while debugging, h, t string variables have the correct values, but somehow mystream.write(t) doesnt work (it doesent write anything to my h.txt text file...
What I want is to have the ability for the user once the values are entered into the Textboxes, the user has the ability to save the values for retrival a some later time. This is what I have so far
I have a small database from which I need to select specific data for my Windows Form Textbox.I have a table in a database with a few columns: "ID,Date,Val1,Vla2,Val3,OK" (int, date, int, int, int, bool). There are several rows, but only one of the rows has the boolean value as 1 (or 'True').I would like to select all of the information from that row and write it to different TextBoxes.[code]
I am trying to write a code which will combine these values and format it in the following format to be used as control/validation ID. I have written a line of code that will merge these values together into a long string but I can't get the zeros to fill in. For month, I get 4 instead of 04 and for numeric value I get 1 digit number instead of having numbers with 0 padding to the left.
I have little MD5 Check Sum app, and I want if i click on some file in the entire Windows OS, with right button, in the context menu there to be a button "Check MD5 Sum". Like when you install WinRar, the app assign values there for archive, and extracting.
