In this program i am making, i want to get information from a text file. but i need to get it from 2 different subs. one sub loops and gets the information every loop and other gets it when a user clicks a button. when they get it at the same time, i get an error saying that it is already being used by another process.
View 7 RepliesI have created a sub folder (named 'Data') under my project through the solution explorer. I also have created a text file (data.txt) inside the new sub folder. This text file is used to store information such as settings and connections.
I can check the file using the full path. However, I want to avoid errors such as moving the project folder to a different location. Is there anyway to check using a relative path? File.Exists("~Datadata.txt")
Or is it better to create it under Application.StartupPath?
I am trying to create a program which will read the files that exist in a directory, and then write in a text file the specific information (full file name, date created)i have found several code in the site but i cant make it work, the machine i am running the code is XP and i am using VB2008.The code i have found is the following:
Imports System.IO
Imports System.String
[code].....
I need to show a grid of saved projects (compare "orders") in a datagrid, where the projects are saved in an Access 2000 database with a similar schema as follows:
ID Name Country_ID Plant_Type
1 'Test' 1 1
2 'Second' 2 2
Let's call the file "Projects.mdb". This is then showed in the datagrid as:
ID Name Country Plant Type
1 'Test' 'Germany' 'Free Range'
2 'Second' 'France' 'Inclined Roof'
where the countries and "Plant Types" are fetched from a different table in a different .mdb file (also Access 2000, call it "Language.mdb", although there is a lot of different background data in it), depending on the current user's language preference. It is unfortunately not an alternative to merge these .mdb's into one file.
To be able to show the datagrid I have so far linked the tables from "Language.mdb" into "Projects.mdb", but this screws up when the project is being installed on another computer with the .msi file i created (we'd like to have this easily packaged and installed), as the "Language.mdb" doesn't exist on the linked path on the target computer (Basically the problem here).
I can come up with the following solutions:
Force all users to install on the same path, so that the links will work (undesirable)Use connection strings in the query as shown here on MSDN (still trying this out, but I need to work on the details)make a post-install script that relinks the tables according to the correct path.
I am attempting to access an SQL (.mdf) file I have created with the Database Explorer utility of Visual Basic. Here is some relevant code from the program:
Imports System.Data.SqlClient
Dim Database01 As SqlConnection = New SqlConnection("Data Source=C:Test01.mdf")
SMUDatabase01.Open()
At this last line of code, I get the following error message:
"A network-related or instance-specific error occurred while establishing a connection to SQL Server. The server was not found or was not accessible. Verify that the instance name is correct and that SQL Server is configured to allow remote connections. (provider: SQL Network Interfaces, error: 26 - Error Locating Server/Instance Specified)".
I am using Windows Vista OS and the firewall is turned off.
I suspect the problem might be the settings (such as connection strings) within the app.config file, but if so I am unsure what the correct coding within this file should be to access the file.
I want to know that is there is anyy way to access the video files in vb.net .I know the WMEencoder but tell how to get it in our program
View 4 RepliesMy problem is that I have a program which needs to access images for multiple choice questions, hundreds of them. Now when I publish the program it is not taking the images with it. I have read some information by 'kleinma' regarding publishing and he says to right click on the Bin and click include in project, but when I do this there is no command in the menu for this.
I have included all of my image files in the Bin and have also added them using the resource editor, but to no avail As I have indicated it is the Express edition, could this make a difference
how would I go about making the user access different local SQL databases. As in they use a GUI program to access / read / write data in a database but can also use that same GUI program to do the same to multiple database files.Is that sort of setup easy to integrate into a VB program? or does a VB program by nature only try to access one database? To integrate the open and close dialogs into a VB GUI in terms of different database files, is there much involved?
View 10 RepliesFor a project, I need to extract all the frames of an AVI video. This I have accomplished by with free program. The problem: it took a 30 second clip and spit back 5400 some frames, and the image only changes every 20 frames or so. I really only need about 270 frames, but I didn't want to go through each one manually. So, I wrote a small program using Visual Studio 2008 and VB to open each image in binary and compare it to the one before that. If there is a discrepancy of more than 55000 (to accommodate slight errors in capturing), it leaves the file be. If not, it deletes it.
After much troubleshooting, I got it all to work. I ran it on the directory containing the images, but when it finished, only the first image remained. I checked into it, and found that the FSO loop I have set up to loop through each file was pulling the files in apparently random order. It will give me the image "bg(01).bmp" and then immediately "bg(1362).bmp" and so on. And the order changes every run.
I tried setting up an array to generate a list of all the files and then sort them, so I could pull off the name of the file, then the next one, ect. but it took over 3 hours to finish processing the array, and then It was using a huge chunk of RAM.Is there some way to "force" vb to pull off files in alphabetical order? here is my, code, it belongs with a form. fPath is a global variable, simply pointing to the source directory.
[Code]...
My application (vb.net) sometimes throws an "access denied" exception when attempting to delete files in the AppData folder and I'm not sure why.I confirm that the file exists before attempting to delete it and have not done anything to make it readonly, etcThe interesting thing is that it seems to go okay when I'm logged in with Admin rights
View 2 RepliesIm designing a program that will read from various text files (preferably RTF files) and then put them into the RTF box in the program when a button is clicked.
Here is the portion of my code that i am referring to.
Try
Dim fileText As String = My.Computer.FileSystem.ReadAllText("c:\" & selectedHero & ".rtf")
infoDisplay.AppendText(fileText)
infoDisplay.Rtf.Format()
Catch
MsgBox("Selected Hero currently has no File with us.")
End Try
Now heres the problem. In the file i have a few pictures and its formatted and what not. I thought since its a RTF file and the Box is RTF it would auto format.... but anyways. It appears like this in the RTF Box.
{\rtf1\ansi\ansicpg1252\deff0\deflang1033{\fonttbl{\f0\fswiss\fcharset0 Arial;}}
{\*\generator Msftedit 5.41.15.1507;}\viewkind4\uc1\pard\f0\fs20{\object\objemb{\*\objclass Paint.Picture}\objw3000\objh3000{\*\objdata
[CODE]...
Ok so im not sure how i can read from a RTF file and put it in the RTF box with the right format....Ive been searching around for a while.
On a image file (PDF), the OCR has recognised the picture and text. However on Visual Basics, how do you search for a text on this image file? The primary goal is to allow a text search (i.e POxxxxx) on all the image files (PDFs). The returns of the search will be the assciated image files where the text (i.e POxxxxx) is found on.
View 1 RepliesI'm working on a CMS web app (aren't we all) and wondering if it's better to store the content of web pages as files on disk rather than text fields in MS MSQL.
There will be thousands of pages, a lot of content, so I was loathe to burden the database when it might be quicker this way.
Does anyone know if retrieving the contents of a file on disk is overall faster than reading it from a large database field?
i have got a text file with contents in the formatuser:hashand in other text file i have cracked hashes in the formathashasswordBut not in order as the first file..i need to take hash from each line in the first text file and compare it with the second file and if it finds it the hash part in the first text file should be rewritten with the corresponding password from the second file.
View 11 RepliesI'm getting a problem when writing text files using StreamWriter. The files read fine and they write fine if I'm not overwriting an existing file. They also write ok as long as I'm not writing over a file that only has one digit at the end of the name. For some reason when there are 2 digits at the end it crashes when I'm trying to save over an already existing text file. Here's my code.
StringForTextFile = "C:" & Folder4PS & "" & IDCodewDashOrN & "Series" & Series & "ScreenNumber" & ScreenNumber & ".txt"
LblTesting.Visible = True ' Testing
LblTesting.Text = "StringForTextFile = " & StringForTextFile
[code]....
above but 've tried all the different Encoding possibilites. Unicode, UTF32, UTF8, UTF7 as well as without those parameters listed where the close parentheses is right after StringForTextFile. I get the same result. If I'm writing a new text file that doesn't exist, then no problem or if I'm writing over an existing text file but it has 0 to 9 at the end then I'm ok but if I'm writing over an existing file and there is 10 or above(haven't tried triple digits or all values) then my application crashes. You see the test label in the code above because I was looking at exactly what file it was trying to overwrite and it is just as it should be.
Should I be using a different procedure? An example of a string that would cause a crash for the string StringForTextFile would be:
C:Name of My AppSeries1ScreenNumber10.txt
If it was being written for the first time then no problem or if the 10 at the end was 0 to 9 then no problem also. I've also tried and originally had it set up where there wasn't an If File.Exists(StringForTextFile) = True Then statement. It just always used the same code whether writing or overwriting and I wasn't having a problem that I remember. For some reason I started having a problem recently and I put the alternate methods of writing in.
how to get a program to read a text file randomly.
I want to be able read text into a variable without running into the end of file.
How can I make txt files and read them in VB2008? The text file does not just consist of one single line. But probably more than a single line.
How do I read the txt file and put each line in one variable.
For example, the txt file:And read it, putting each name in an array variable.
I have two text files. The first text file has the format:
ID h1 h2 h3
a 1 5 7
b 3 3 5
c 0 4 8
And the second file:
ID h4 h5 h6
a 2 4 9
b 3 6 1
b 4 1 5
Now I want to merge two files. The output likes
ID h1 h2 h3 h4 h5 h6
a 1 5 7 2 4 9
b 3 3 5 3 6 1
b 4 1 5
c 0 4 8
The two files has the same rows and columns. For the first rows(except header) in the two files, they have the same first column. Therefore just a simple append. The final first row becomes
a 1 5 7 2 4 9
The question is in the first only has one
b
and the second file has two
I want the maximum count of items from each list in the resultant list. I put some white spaces after "b" then append strings.
b 4 1 5
For key "c", because it is only in the first file and not in the second file, so I append white spaces after the corresponding strings.
I am currently writing a program in VB 2008. Here is what the program is intended to do: I need it to have two forms of input, so I want it to open existing text files and create new ones. Once the user has selected what input to be taken (either a file is opened or a new one is made, guessing multiple forms need to be used here) the user will then take the text file either created or opened and then be able to click a button which will sort all the text in the text file into alphabetical order and then display the results to the screen. While this happens, I need the words in the file to be counted by a counter (so a loop i guess) that then displays on which line each word appears on. I then need this information to be displayed in a text box on screen.
View 2 RepliesI started with not knowing anything and I have built 2 programs over the last month and a half and have learned valuable information from the help of this board. I have 1 last hurdle before I am done and I am hoping to get another tip for this. First of all let me start by explaining what I have done.
[Code]...
how I would be able to make the click of a button scan a certain directory for certain files like .txt files, and display those files in a text box, or if not a text box some other viewer.
View 7 RepliesProblem 1: I am running into a problem with my program that when UAC is active on Vistaaccess to C: and Program Files is not allowed. My program writes text files as a user types. Is there a safe place to write files to that may be some sort of standard instead of throwing files all over the place? Like maybe somewhere in the user's default folder's or something?
View 10 Repliesi've been busy with a program and it has worked out quite well. The only thing I still want is that it is possible to customize things and save that in a text file. Normally if i want an other background for one day, i need to change it in VB or make a checkbox to do that. if i then restart the program all the settings are lost and i have to set it again. so i was wondering if the program can make a text file and put codes like 1 for theme 1 and 2 for theme 2 etc. in it, then save it and load that file when it starts up again. and is this also possible for a login form? if yes, i can also add a "Create Account" button for my program instead of adding codes in VB.
View 6 RepliesHow to access the text of a List box control in a for or for each loop
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I have files in a folder which i need to append and produce a single textfile.
1)I first select the folder using FolderBrowserDialog and write the path in the textbox.
2)By the click of a button I want to append all the files contained in that folder and write it in the same folder with the name of the textfile as new.txt
[code]This code open the FolderBrowserDialog and selects the folder and writes the path in the TextBox1..I need help to proceed with appending the text files within that folder
I am new to VB.Net, but I can tell you so far I love programming. That said, I'm building a tool basically to parse and display simple plain text log files. I'm hitting one stumbling block that really has me frustrated.
Other tools are able to load huge log files (500MB even) in a number of seconds. My tool, basically hangs loading a file that is maybe 5MB.
I'm using the MyString = StreamReader.ReadToEnd to read the contents into a string, and then RichTextBox1.Text = MyString to display the contents. That said, I really want to display the contents in a datagrid, but there has to be a better way of doing this?
How can I get my application to load larger files and display them faster? What am I doing wrong?
I'm working on my very first VB 2008 Express program, having a little bit of experience with VB 6.For my first VB 2008 program, I'm starting out simple. I have two text boxes, named Title and Director.You input text into each text box.I also have a button named GENERATE, which generates a text file named c.est.txt and stores the text box material.[cod]I know how to do this with VB 6, but not with VB 2008, and my research hasn't come up with an explanation of how to format this correctly.So how do I revise this code so that there is a line for each text box string, how do I get rid of the System.Windows.Forms.TextBox stuff and replace it with my own headers, and how do I double-space between lines?
View 13 RepliesI'm trying to write a program that will take emails that I have saved from outlook as text files and scan it for specific data, and return those strings to a textbox (i will modify it so it outputs the exact way i need it, i just need to grab that info faster than it takes by hand). I dont know how to go about actually grabbing that specific data.
From: Person
Sent: Wednesday, December 03, 2008 10:31 AM
To: Me
Subject: Subject
[code]....
There can be only one grouping (denoted with asterisks, they are separated in the emails like that as well), or 50 and any number in between. I only need the information as shown in the text file example above (sometimes, it is blank or not there - if that's the case just skip and messagebox.show to alert me that it was skipped).
Is there a code for accessing the last two characters that the user places into a text box? Meaning, if the last two digits are not PM or AM, a message box should show saying that it is not a date (just for an example).Bgeo99
View 1 Replies(First off all hi to everyone my first post!) Ok, i have two programs one program writes to a text file on a consistent basis, while the second program is opening this text file on a consistent basis for reading.. Sometimes the programs are accessing the file at the same time and the user keeps getting this error : this process cannot access the file because its already in use..
Is there any class, in system.io that i can use to modify the settings of this text file so both programs can access it at the same time?