Keep Files Open Or Store In An Array?
Aug 25, 2009
I'm writing a program that reads randomized test questions from a text file. The text file includes information about how to set up the screen including which pictures, videos or buttons etc. to show for each question. The user responds to the questions and another text file is created logging the results. would it be better to read in all the data from the text file into an array to work with during the test, or should I just read the questions one at a time keeping the text file open while the user responds. The amount of data that would be read into an array for an average test would be about 200 lines which range from a single character to 20 sentences (whose length would of course vary).
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Jul 18, 2011
Is it possible to store excel, word, pdf, .rar .zip files to a column in a table of a SQL Server 2005 DB.And also open the fie with excel, word, acrobat reader, etc????My other sollution would be to store the file on a location on a server and only sory the filename and location in my db and then open them with "Process.Start("filename")".My main problem with solution 2 is this:Lets say I install the programm on a pc called "manager". When I use the savefiledialog and I am on the manager pc the string C:/myfiles/test.xls will be stored
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Jul 28, 2010
I am trying to create the following program Store in a 1d array a set of 5 place names and in a 2d array the distances between the places. Ensure that the order of the places is the same in both arrays. When the names are places are input the distance between them is displayed. If they are not both in the table a suitable message is displayed
Dim town(1 To 5) As String
Dim Dist(1 To 5, 1 To 5) As Integer
Dim First As Integer
[CODE]......................
I think the best way forward is pass a parameter to the function findnumber.
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Apr 1, 2009
I need to scan either a drive are folder and search for .theme .VStyle and shellstyle.dll and there folder/subfolder names.The code scans for all .Theme files on the drive or in a folder, when it finds it it stores the folder name that file is in and also the name of the .theme .
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Sep 9, 2010
I want to reading in a excel file and extract the sCodenumber sDescription ans the sStatus and store them in a array : StatusComposeArray(5200) As MyCompose. After this I need this array for comparing outside this class. But as can you see the array is defined inside the sub: ReadingIn_ExcelFilesCompose [Code]
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Feb 13, 2011
To improve performance, when one has many files to readwrite it is better to save them in smallergroup in different folders. Is there a magic number over which it is better to start splitting the folder? for example below "10.000" (invented number) files can be stored in one single folder, while above that it is better to start storing files in multiple folders.
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Dec 14, 2010
I'm doing a project where we are re-creating a very old system.The client wants the same base functionality and some improvements.One of the things I'm currently working on is the note-system. These are used as flags of some sort, but are also used as a comment field for some products or client profiles.In the old system you could write the text and save it like you would get in a .txt file. They want the new one to be able to do word formatting such as:
Different font sizes (Only some parts of the text)
Different font colours (Only some parts of the text)
Underlining of words
Bolding
Italics
Tab-spaces
Those are the specs they want. What I need to know is the following:
1) How do I do that?
2) Currently they store all these files on the server as text files and the database have paths that refers to each file. I want to be able to save a text file with that formatting to the HDD of the server like in the old system.
3) If possible I would like to save that text to the database with the formatting.
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Jan 18, 2009
yes Is there a way to store Files in to VB app.?
Becasue im planing to go somewere and i dont have a flash drive and i was wondering if there is a way...so i dont have to download many files...
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Mar 22, 2012
I am coding a program that will allow the user to input 5 payrolls for Store 1, Store 2, and Store 3. The total of the 5 payrolls are then added together and shown in the respective Store's labels. A total label is also there to add up all the totals into one number. The numbers in the label must be in currency form. My problem is the numbers don't add correctly when I hit calculate. The first two numbers add together, but then after that the number just seems to subtract a random amount.
So far I have this --
Public Class Form1
Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click
Me.Close()
End Sub
[CODE[...
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Apr 13, 2011
I want to store value in array, from my database. I am using following code but it return error: "Object reference not set to an instance of an object."[code...]
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Dec 10, 2010
I'm trying to store all my files into one file. I have quote huge file but the file stops at 194,000 KB and it doesn't save beyond that but the problem I've built says that the file has been saved. I would like to know if there is a way to go beyond this limit? And for the file to just keep getting bigger.
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Oct 13, 2009
Some time ago in VB6, I wrote a recipe program that basically stores all the recipes as text files. I was going to rewrite it in .NET and use an Access DB. I figured this would help in searching and other things, ratings, etc. But I'm a little stuck. I don't know if:
a) I can or should store all the text files in the DB
b) convert the text files to some other file format
I can already use GetFiles with a mask to search the filenames, not sure if I need or want full text search. So, should I flush the DB idea or how to move forward? I really don't want to use SQL, but if that's the way to go then...
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Sep 4, 2010
I'm writing an application that will be used to generate reports from a database and I want to have several predefined reports/queries built in but also offer the user the option to create their own query and be able to save it and run it whenever they want without having to set the query up again each time.
So I figured I would just store the query parameters in an XML file for the ones that a user has created themselves and I would store these XML files (one for each query) in the user's Application Data folder.
I'm wondering what I should do with the built in queries though (bear in mind that the parameters of these built in queries should not be configurable). As I see it, these are my options:
1. Have the query parameters hard coded in the application
2. Store the query parameters in XML files in the location where the app is stored (ie Program Files) - the installer would create these files when the app is installed
3. Store the query parameters in XML files in the user's Application Data folder with any queries they have created themselves.
I'm leaning towards option 2 for the following reasons: All queries (user defined or predefined) would then be in the exact same format and the program could then run them all in the exact same way. Option 1 would mean I would have to release a new version of the application if I ever wanted to change these parameters. Option 3 would mean that the program would have to create the XML files each time it was launched by a new user so it would be a bit pointless and the values for the parameters would still have to be hard coded in the application so that it could create the files correctly.
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Jul 24, 2011
I'm having a hard time learning picture box.I can't figure out how to store a picture in an array.when i press the button the Picture Box1 generates 1 picture out of 5 pictures.[code]
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Mar 15, 2011
I want to store a regular array in My.Settings. Not an ArrayList, not a StringCollection, just a string Array. Can this be done? If so, how is it done? I can't seem to find the string array datatype in the settings designer in Visual Studio.
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Jul 15, 2010
I would want to store a datagrid row in a array.Every column value in a diffrent "part of the array".Like
Array(0) = column index 0
Array(1) = column index 1
But just from one row and the same row!
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Apr 9, 2010
I have a table in an access database than manages user subscriptions. A user can have many subscriptions which is where im having trouble in terms of code.What i aim to do is store all the courses in an array of strings but i don't know how to do it.[code]The above code would be the command that i'd use to select the courses that the user has but i need to know how i would store the results in a array.
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Feb 20, 2011
first i need to input the expression in textbox that will be store to CharArray and then substitute the variables to integer by using input boxes.. my problem is how can store the integer to an array and also store the operation..
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
Dim arr() As Char = TextBox1.Text.ToCharArray
[Code]....
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Apr 13, 2011
Problem storing value in array from database
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Mar 25, 2010
I am trying to create a "Generate Number" application. It needs to generate numbers ( 1 - 100 ) and add them to the array. I have the numbers generated already and outputed into a list box. but I am not sure on how to add them to the array.
I have generated the numbers using for...next and do while loops. But I haven't been able to get the right syntax to be able to add the numbers into the array. [code]/...
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Aug 26, 2010
I need to know how to code a windows application program that will make it possible for customers to place orders online. Customers will have access to menu using a combobox,containing items available. The text file contains all menu items and the price of each item, as well as number of orders for each item. The file is created with a notepad containing 5 menu items.the first line contains the name of the item,second line contains the price and the third contains total number of orders which initially is 0. So far so good i know how to check if the file exists or not,and populating the the combobox, but ther's an instruction where i have ensure that the number of menu items does not exceed 100, and if so,should display an error message.and should validate to ensure that the total number of orders is>0,if not,re display the input box with a suitable message. Then on the save(menustrip),should write the whole textfile from arrays in memory,clear the combobox,display the message. Also has a process payment button where it should read through the arrays with a for next loop,then shouold write function called amount due,which recieves the total orders as a single data type,where the value for amount due is calculated as total orders*price.CAN SOMEONE PLEASE HELP ME OUT SINCE IM A BEGINNER IN VB2005.
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Apr 22, 2012
I want to store large files(over 100mb) in a sqlite database. I noticed, that its not good in performance.Do I have to store the files in a local folder, or do i have to rewrite my code?
Shared Sub BlobToFile(ByVal Blob As Byte(), ByVal file As String)
Dim MyData() As Byte = Blob
Dim K As Long[code].....
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Nov 11, 2009
I have an ASP.NET application (vb.net codebehind) that has serious performance problems because of its storage of TIFF files in one server share. There are over a million .TIF files there now! The application tracks the scanned images of property with a corresponding row in an Oracle database table. We have this idea that it might be better to store the images themselves in a new Oracle table.
The alternative solution we are thinking of is to split up the server share into multiple folders by State (an OH folder, a WV folder, a VA folder, etc.) Seems like the database option might make more sense long-term, but how do we do it? Can a TIFF be stored in a BLOB column and then extracted back into TIFF format using .NET?
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Apr 12, 2011
As I'm working with some image files for my project, where should I store it ?I mean, they will be displayed frequently to the user. What I do currently is store in the app directory and when needed, I use:
vb.net
PictureBox1.Image=New Bitmap(Application.StartupPath & "ImageName.png"
For some background images, I used to set it at design time. That is, selecting the image needed using the Image property and never changes it at runtime.So, what will be best place to store it efficiently.
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Apr 18, 2011
i've a treeview in my project form which look like this.[code]The user will be able to upload their pages to the respective pages nodes and I am suppose to make it in such a way that after the user uploaded the cover page which is showing at the PictureBox1 which I've use to display the image, and when he uploads the second page image at the PictureBox1, the Cover page image that he uploaded earlier on will not be overwrite.I was told to create class and use array to store the contain in the respective nodes but I do not have any idea how to do it.Is there any other ways about solving this problem? I'm using Visual Studio 2008 vb.net.
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Jan 25, 2011
I have a text file called COUNTERS_SETTINGS.DAT having the following contents:
[USERID]<=>COUNTER_1
[PASSWORD]<=>ADMIN1
[CONNECT_STRING]<=>DATA SOURCE=RECAT;USER ID=PAYOPER;PASSWORD=PAYOPER
I'm Trying to have that entries in a Jagged array of Strings like this
Array Name is : Core (2,1)
Core
(0) (1)
(0) USERID | COUNTER_1
(1) PASSWORD | ADMIN1[code]........
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Dec 11, 2009
I am building a small office application that requires users to log in dont need encryption or other sophisticated aproaches. all i need is an array of passwords that users can log in.
So If passtext.text= "test" or "test1" or test2" then
else
msgbox("Fix password")
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Jul 5, 2009
I have the following code which obtains the compass direction from a degree value. I'm new to VB.Net and was wondering what is the best way to store the values, in an Enum or an Array?
[Code]...
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Mar 29, 2009
I'm trying to convert old code to VB in VS2005. The code I'm working on is used to store values in a string, which will then be handed to a proprietary scramble function. This function is a given in this case. I've already switched from a string to an array of bytes in my .NET code.
The old code (VBA) was using a string value to store the data, example function for Double value:
Private Function DoubleToStr(ByVal value As Double) As String
Dim Bytes(7) As Byte ' 0-7 Double is 8 bytes
Dim n As Long
CopyMemory(Bytes(0), value, 8)
DoubleToStr = ""
For n = 0 To UBound(Bytes)
DoubleToStr = DoubleToStr & Chr(Bytes(n))
Next n
End Function
The code basically copies the memory contents (using API call CopyMemory) of the memory (held by the double variable) to the memory held by a byte array. It then reads the byte array and converts it into a string. Workarounds could be to convert a bool or long to a string, though that would be expensive in terms of memory/storage eg. 1234564787 would be 10 bytes in a string where as a long is only 4 bytes (factor 2.5 increase).
How to retain the original precision? Converting it to a string would result in endless numbers. Another problem (at least I think it could be) is that in VBA the variables are rather simple, but in .NET they are all objects, so how to retrieve the actual memory location of the value? let alone garbage collection moving stuff around. How to get those variables stored in my byte array?
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Aug 17, 2011
I'm retrieving data from Active Directory(name,department,title,company,mail) into a string seperated by commas and I want to split the string and store them to array where i can export it in excel before updating it to my database. but i how do i store them to an array?
here's the code: I'm getting data from AD and storing it in list:
Dim formattedName As String = String.Format("{0},{1},{2},{3},{4},{5}", _
resEnt.Properties("name")(0).ToString(), _
resEnt.Properties("company")(0).ToString(), _
resEnt.Properties("department")(0).ToString(),
[Code]...
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