I want to create temporary text file because after I use the text file, I want to delete it. But I just create the text file and write into th text file and at the end of the process, I want to delete it. However, the system won't allow me to delete it as it being use my
Dim objWriter As New System.IO.StreamWriter("C:\Blind Holes.tmp")
objWriter.WriteLine(lineP(1))
[code].....
I'm in an upper level industrial engineering class in which we're learning some entry level VB programming. We're working on building a program to solve the travelling salesmen problem (finding the shortest path through a collection of cities while visiting each only once) and I'm trying to add some 'fancy' to it so I can learn some more skills. The basic program is designed to load a bitmap file of a map into a picture box and a text file with the xy coordinates of any city positions. From there, the user can plot the cities with red squares, draw a random tour through the cities, or tour the cities by always visiting the nearest neighbor not yet visited. The modification I'm working on is a method of pointing out a specific city with a black square by entering the city's number (determined from the coordinate file) into a text box.
Private Sub TxtFindCity_textchanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles TxtFindCity.TextChanged
Dim ObjFindCity As Graphics = picShowMap.CreateGraphics
Dim City As Integer
[Code]...
So far, the program works, but I want the black squares (but none of the other graphics) that are created to go away once the text box is cleared. As of now they just hang around on the screen until I refresh the entire image with a 'clear map' sub. Any suggestions on how to accomplish this?
I just need to know how to create a temporary file for each line of a file when it is selected in a listbox, so that i can split it and assign each part to textboxes.
1) create temporary file from variable for each line of a current file (each line represents a contact, and temporary file's name is the contact's fullname(variable as string))
2) listbox SelectedIndexChange = search fullname.dat (temporary file)
3) split the content of the fullname.dat file and assign each part to display in textboxes the only thing i got a problem with is creating the temporary file.
How knows how to create a temporary data file in vb.net without using sqlserver.
View 2 Repliesi am using visual studio 2005 and database sql server 2000. i want to read table of database and readed data insert in temporary table again update that inserted record.
View 3 RepliesBelow is my code for DELETE button. What i want is if the user select the transaction from the listview and press the DELETE button it must be able to delete the transaction from listview and text file(temporary log file) which i keep all the transaction record. At the same time the list view must able show the total current balance from the deleted trnsaction.
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Basically I've been using the VS2008 Express editions for the last few years. With the express editions (with the exception of C++), by default when you create a new project, the project files are all stored in a temporary directory. When you select "Save All" for the first time, VS would prompt for a project directory and then you could save the project into your regular project directory.This is behaviour I found exceedingly useful, as many times I create very quick, simple programs to do 1 thing for me before never needing them again.Once I close VS, it prompts me whether I want to save the project, I select "Discard" and everything's all good; my project directory doesn't get cluttered with useless directories for 1-time projects and everybody wins.
However, with VS2010 Ultimate I've noticed that the default behaviour has changed and all new projects are created directly into my Project directory (yes I'm aware I can change the directory when creating the project, but that's a needless waste of time). This has led me to reverting to express editions whenever I want to write a small program, which isn't too bad at home, but at work we only have VS2010 professional. Every time I create a simple project I have to remember to delete the directory later or face having a directory of "WindowsFormsApplication1000232131231".
Is it possible to create temporary tables in MS ACCESS using VB.NET?
View 3 RepliesI am wanting to pull data out a select table and wanting to use it locally as Read Only data I am stuck on how to write the data to the local Temporary table[code]...
View 1 RepliesI have a VB program that creates a temporay PDF file then opens Outlook and attaches the file. I create the file in hte application path (the location that the program is running from - normally C:Program FilesProgamName This works fine in XP as it appears there are no crazy permission issues. However in Wondows 7, the file does not appear. There are no errors, the file does not exist in that location.
I've changed the path to the root of C:, however this doesn't work either. I suspect it's something to do with W7 virtualisation, so the question is where can I create a file that I can then access again?
I was trying to avoid creating it on a share on a server, but it's looking like this is the only place to put it as there doesn't seem to be many places a user can write files to in Windows 7.
Surely there must be a location that users can access (without being administrators) to create files. Don't even get me started on the fun I have had with the registry in W7!
I've got some temporary files I've created in a folder suffixed with -tdf (stands for to delete file), I'm deleting this file later, but when I check the folder it exists in, it's still there. The code is pretty much this:
[Code]...
I'm trying to find out if it is possible to something and really need your help.
What i want to be able to do is have a RichTextBox on my form that i can enter my description into, then when i have finished i want to be able to save it to a memory stream as a .html file.
I then want to be able to read the source of the HTML file to amend the format of the description and then display it in a webpage?
I have a problem with the temporary internet files. I know how to locate the folder and all the rest, but I'm going to see what second c 'is in the folder with Explorer I see dozens of files, but when I go to see through code, I see only two files, index.dat and desktop.ini. I thought that the index.dat file is a kind of file that contains the files that I see through explorer, but it seems too light, and still do not know how to copy the files it contains.
View 2 RepliesI have a program where by I want to copy a temporary (in coming file from an email attachement) and I want to paste this onto my form (listview control perhaps??)
How can I paste this on there so when I click a button I end up saving this file into a selected loction.
I've google search this with no luck.
I want to create a text file or see if a text file exists when application starts. The problem I was having was after creating the text file, I tried to write to text file and got an error saying that another process was using it.
Dim test As String = My.Computer.FileSystem.SpecialDirectories.MyDocuments & " est1.txt"
If System.IO.File.Exists(test) Then
MsgBox("File Loaded")
Else
[code]....
I looked up topics on filestream, but am unsure if this is how to use it. Is my code ok? Is there another way to create a text file?
How can i make a program that cleans temporary internet file or history ?
View 7 Repliescreating a new folder on a temporary file and moving/copying a file on the newly created temporary file.
View 4 RepliesI have a very large text file about 4 million lines that I would like to separate into several small text files based on the strings contained in the first column of the text file. I want to open the large text file, choose the lines that apply, create a new text file with a name that has a number at the end of which will match up with the value in the first column of the text file. I want to then copy the applicable lines to the new small text file, save and close it. I'm not sure how to go about doing this after opening the large text file and using the readline method. What if the folder does not exist? Do we have to create it? I want this procedure to be general, as there could be up to 25 million lines in the text file.
View 13 RepliesI am trying to create a log file which I am going to use to populate some controls (DataGridView or Treeview). I am trying to figure out if should use text files or XML files to do so. Effectively the log will highlight multiple phases in a client-side app. The log will be written to at various phases when the project is running. The user will always have the options move on to the next phase or save progress and exit the project. As such, I want the log file to highlight how far the user has progressed throught the various phases AND I want the log to highlight varous information from each phase. Whenever the user starts the project, they will be given the option to load existing log files. So the project will have to read these log files and append them where necessary as the user progresses.
I am not sure what the best way to do this is and below is a rudimentary approach using text files. As you can see, the top of the file would have a summary of all the phases and whether or not the user completed each phase. Next each phase would have a data section highlighting what data was stored along the way. I have used a ":" to denote each section. Then within each section I would obviously need to use a delimeter for all my data. So if Phase1 = True, then I would load all the pertinent data from "Phase1:" into the desired control. Can anyone provide an efficient way of doing this and provide some insight as to whether I should use XML instead. The phases my change during development and I am not sure yet which controls I will be using. Does XML provide more flexibility.
In summary I am looking to create, read/write and append log files and populate controls with the data in varous sections of the log file. Example:
Phase1 = True
Phase2 = True
Phase3 = False
Phase4 = False
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This is my first time working with VB, though I've been working with VBA for a couple years now to automate office routines at my work. At my last job, I saved about 3 hours a day with my automations, and at my current job, I'm shooting for about the same. The problem is, though I have a high affinity for computers and technology, I never studied to be a programmer, and so I really can only tweak code I find online, and then eventually build up enough of my own subroutines to accomplish the tasks at hand. This is why I'm posting here on this forum, I've reached my wits end for what I imagine is a relatively simple problem. This was initially written in VB 6, but I imported and converted it with Visual Studio 2008, and it runs fine. This demo code is set to populate a PDFwith some sample string text. What I want to do is to replace the string text with a reference to data in either an Access or SQL database - I prefer Access, but either will work. Here is a sample of the demo code I'm working with:
[code]...
On this last line, I want to replace the "1" sting text with a reference to a temporary 1-row table I'll be generating from an Access Query, with Field Names to match the Form Field names of the PDF, So I've setup an Access DB with the following configuration (in reference to the path, I'm using Vista x64):
[code]...
I have also imported this table as a dataset (my understanding is that the import into Visual Studio 2008 makes it a typed dataset?) so either referencing the access DB directly or the imported Dataset should work. I can also setup the Access DB as a SQL DB instead if it would make it easier. Now, if I was programming in VBA, I might do something like this:
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I want to create a file removal which revieve directory files to delete from a text file..[code]
View 2 RepliesI'm trying to create a text file using the File Object and keep getting the following error message: "The process cannot access the file 'c:dataCompareResults5182009740.txt' because it is being used by another process." Here is my code below:
[Code]...
I have a code which read the text file and give me the matching value.[code]My question is how to create a new text file and write all the value in the message box to the new text file? I thought i can find the matching value and cut and write it beside the original value which is myLine but i dont think so we can do that way.
View 8 RepliesI want to create a text file and write some text into this file, but my code cannot create the text file.
Error message:
UnauthorizedAccessExcepion was unhandled by user code Access to the path 'c:save.txt' is denied.
My code:
Dim fileLoc As String = "c:save.txt"
Dim fs As FileStream = Nothing
If (Not File.Exists(fileLoc)) Then
[code]....
I'm creating a small vb.net application, and I'm trying trying to write a list of results from a listview to a text file. I've looked online and found the code to open the save file dialog and write the text file. When I click save on the save file dialog, I receive an IOException with the message "The process cannot access the file 'C: hethe.txt' because it is being used by another process." The text file is created in the correct location, but is empty. The application quits at this line "Dim fs As New FileStream(saveFileDialog1.FileName, FileMode.OpenOrCreate, FileAccess.Write)"
Private Sub btnSave_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnSave.Click
Dim myStream As Stream
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I need to create a graph from a text file. The format of the text file is like this[code]...
Basicaly i need to import this data in, the first 4 lines are values for a formula. The remaining values are to be put into a fomula and then graph the result!! Obviously i'm a beginner so just learning as much as i can from the web
How do i create a tab deliminated text file?
View 5 RepliesI have been trying to figure out how to take text i have in a SQL text field and create the correct document from it. Here is the info i have in SQL: MIMEType is a string field that contains one of the following "application/pdf", "application/msword", "application/vnd.ms-excel" or a few others. DocumentBody is a text field that looks like "0M8R4KGxGuEPgADAP7/CQA" this continues for quite a bit. FileName is a string field that contains the original file name such as "test.doc" or "test.pdf"
I have tried using the System.IO.FileStream and System.IO.StreamWriter but in the document it actually writes the text that is desplayed in DocumentBody. I assume I am missing some way to decode this using the MIMEType but i just can not seem to find it.
Sources of Assistance: [URL]..Create A Fixed Text File From SQL DB Table I am using VS2005 and would like to add script to my aspx page to Output a Fixed Text File From my SQL DB Table to a location on the network. I did this in VB6 using a FREEFILE and PADSTRING off of an Access DB table. However, I can't seem to get it right in the .NET aspx environment. Can someone assist me with this? I have added the VB6 script that is working now and the .NET aspx vb script that I'm trying to move it to.
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how to create a save to text file method with a try catch in the method in a class and then call this save method from a button on a window form. I am currently doing the save method under the button directly but to tell you the truth i would prefer to just do it one time and call it from different locations in the various forms i have, then copying it all the time.
View 1 Replies