Does anybody know how to to count the number of characters typed in a text file and display in a label? I'm making a simple application on vb 2008 that needs to calculate the number of characters in a text file. The user will enter the text file in a text box. The file will be located somewhere in my hard drive.
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I have a program that searches for a word in a .txt file. When it finds the word I want to print the following 5 lines under that word. So for example: I search for "juice", and my label grabs this out of the textfile:
juice
apple
grape
orange
milk
Is there anyway to this in VB.NET?
How do i count the number of characters in a text file on vb 2008?I need to report the number of VISIBLE characters only (ignoring spaces, tabs , carriage returns, line feeds, etc)
View 1 RepliesI got a question. I have a textfile name membership.txt and using vb2008. However my code found error when try to grab the data to an array. I use delimiter "|" to separate between each data in line to save in specific column in database.
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I have data which can be put inside listboxes, I then proceed to save the data into a textfile then attempt to load it. This all works great until a number of over 1000 appears because it's read as 1,000 and VB thinks the Comma means to go onto the next field.
'put record into the line in correct format
sLine = sCallCentreOperatorID & "," & sCallCentreName & "," & sQuoteNumber
sRecord = reader.ReadLine
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I have not had much time to go threw my code properly as this is some urgency. I need to remove line 1 from a textfile if it contains a string but its not working.I have 500 files and not going to do this manually.
Code:
Private Sub btnRemove_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnRemove.Click
If String.IsNullOrEmpty(txtDirectory.Text) Then
OpenFolderDialogDirectory()
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I also feel the function is very pointless sime i am opening the file twice.
Dim days_in_clc_month(10) As Integer
days_in_clc_month(0) = 30
days_in_clc_month(1) = 29
days_in_clc_month(2) = 30
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i just need to get this block of codes out, and put it in a textfile. and my program will run without seeing it, because it's all saved in the textfile.
Using Visual Studio 2010 does anyone know the best way to retrieve the serial number of the PC's hard disk using VB2010 (not VB6).
View 2 RepliesI'm helping the IT department at my school do an audit of all our printers (there are hundreds). They are all networked, so I wrote a vb.net program that sends PJL (printer job language) commands over port 9100 to all the printers to retrieve the page count. @PJL INFO PAGECOUNT actually gets the page count for all the printers, but for color printers we also need to know the color / mono page counts (number of color pages printed, number of black and white pages printed).... the number being returned by the PAGECOUNT command right now seems to be the total pagecount on color printers, so if I can find a command that will give me either the mono or color page count, I'll have the other number. I also need the serial number of every machine (the spreadsheet I'm working off of is unreliable). @PJL INQUIRE SERIALNUMBER actually returns the serial number for about half of the HP printers, and some random non-HP ones, but I can't figure out a way to get the serial number for the other 50%. I sent emails to some of the people who wrote the articles about PJL I was following, and they advised I try using printer spooler functions (from my brief google search it would appear these are windows API's that facilitate communication with a printer).
Does anyone have any experience with working with the Printer Spooler functions or know a PJL command I might have overlooked that will help me get any of the info I'm looking for?here is my program right now. Ignore GetSerialNumber2 and GetSerialNumber3... they don't work (well actually GetSerialNumber2 works on 5 printers... but yea). GetSerialNumber() is the one that gets the serial number successfully for about half of the printers. (edit: I took out those functions in the version I posted, along with some other stuff that wasn't needed for this, to fit the post size limit)
I need to find a method of looping through a listbox and retrieving the index number and values - quite straightforward in asp, but turning out to be something of a nightmare in winforms!Here is the scenario - The user can add values in a textbox, that are in turn added to a DataTable that gives it a unique ID and a row number, this is then bound to the listbox. The user can then move the items up or down the list by adjusting the row number in the datatable and rebinding to the listbox..
The problem that I am hitting is when the user needs to delete an item -the first part is easy - delete from the DataTable and rebind to the listbox. The bit where I hit the proverbial brick wall is needing to loop through the listbox rows and getting both the index number and the ValueMember - that way I can change the row numbers in the DataTable based on the index number against the ID number.
I have a query to solve for which I have coded. But my code produces output only for those hardcoded values found in the text file. I have a text file which is given as the input to my code. The text file contains lines with "_DIA" , "_DIA_some number" etc. In this case I need to remove few letters from that field.
Eg: 1)if the name field contains 1234567_DIA_2.PRT, I need to remove "_DIA_2" from the name field and concatenate the .PRT with the number. 2)if the name field contains 1234567_DIA1.PRT, then remove "_DIA1" and concatenate. I need to store the number of characters removed and add so many number of blank spaces with the name field after the concatenation.
for the 1) case I need to concatenate and add 6 spaces with the name field. for the 2) case I need to concatenate and add 5 spaces with the name field.
I'm not sure how to find the number of characters from "_" to ".", underscore need to be considered in the counting and the dot(.) should not be taken into account.
Say I open a text file in a richtextbox control. After that I search for a specific string like "6.1". The string actually continues like "6.1XXXXXXX". I need to get not just only "6.1", but also 2 more chars after "6.1", like "6.1XX". I will then output this in a textbox, but I can do that, I don't know how to get the X number of characters.
View 4 RepliesI'm attempting to modify some random password generator code, and wanted to do something a little different. I would like to list all uppercase, lowercase, numeric and special characters next to a text box. In the four text boxes, you would select how many characters from each set you would like in your password. For example 4 uppercase, 2 lowercase, 3 numbers and 2 special characters. That would generate a random password 11 characters long. I can generate random passwords now, and have included a text box which allows the length of the password to be specified, but i would like the granularity of selecting from each set.[code]
View 7 RepliesI've written a piece of code that takes 3 fields from a database and writes out the 3 added together, but with the middle field cropped down, so that the total number of characters is always 28, what I thought was the width of my listbox. I realised when I debugged though, that the listbox was docked and grew or shrank depending on the size of the screen.
Is there a way to determine how many fixed width characters will fit in a control, at run time?
Is there a function in VB.net that allows me to divide a really long String into a specific number of characters? [code] The length of this string is 18 and I'd like to group it by 3, so each group would contain 6 characters. Is there an easier way of doing this? Is there a predefined function in VB.net? I'm already thinking of doing it manually, like converting the string into characters and storing them inside arrays.
View 1 RepliesI want to restrict the number of characters you can put into a textbox.
View 7 RepliesSay you have the following string: Welcome to my program!
But you only want it to show a certain amount of characters then "..." so it would look like this: welcome to m...
I'm addressing this problem because I'm making a tabbed web browser and when I create tabs I have the document title as the text, but It looks weird without it cut off, so I wanted to know how I could replace the text after say, 15 characters with
I have a RTB which I import with a set of 7 or 9 didit numbers, 7 for Staff and 9 for Students. e.g. Staff numbers [code]and depending on what is selected in a list box ('Student' or 'Staff') will generate a string to create user accounts. To further error check I would like to check if a line in the RTB = 7 And Listbox = "Student" Then msgbox("Data mismatch between User ID and Account type")
View 4 RepliesI need to format a string in a fixed number of characters.
For example, if someone type TWO
It has too save in the variable
000TWO
if type THREE
0THREE
Always 6 characters and fill the rest with zeros on the left.
I have been looking for the best way to obtain the total number images in a folder where the first two characters on the file name are XX and place this number into a variable.[code]...
View 1 RepliesI'm using this code to return some string from a tcpclient but when the string comes back it has a leading " character in it. I'm trying to remove it but the Len() function is reading the number of bytes instead of the string itself. How can I alter this to give me the length of the string as I would normally use it and not of the array underlying the string itself?
Dim bytes(tcpClient.ReceiveBufferSize) As Byte
networkStream.Read(bytes, 0, CInt(tcpClient.ReceiveBufferSize))
' Output the data received from the host to the console.'
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Len() reports the number of bytes not the number of characters in the string.
I did this for one of my homework assignments in C#. However I need to do this in Visual Basic. For VB it just needs to be 6 characters and have one numeric digit and at least one alphabetic character.
Private Sub btnVerify_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnVerify.Click
public string getPassword()
End Sub
Private Function IsValid() As Boolean
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For a project I need to do a String strX is said to be a cyclic rotation of a String strY if it's possible to rotate the characters in strY by some number of positions, n, such that strY becomes strX. I don't mean rotate in a Caesar sense here but in a left-right (or right-left) sense. For instance, strX = abanan is a cyclic rotation of strY = banana because rotating the characters in banana to the right by n=1 (i.e., by one position), wrapping accordingly, yields abanan. Similarly is strX = anabana cyclic rotation of strY = banana because rotating the characters in banana by n=3.I need to write an application that returns True if strX is a cyclic rotation of strY otherwise the result is False. I'm looking into how to do this, I know it will involve and if then statement and possibly some loops. Is there anyone who can help me better understand what I should do?
View 4 RepliesI'm currently building a Terminal Emulator and can read RS232 data ok into a Textbox.
However, I want to remove a set number of characters before each line received.
I've got so far with StringBuilder but my code is wrong somewhere as it cuts out every other line.
The original text looks like this:W 320:15:25 0300 SAMPLE FLOW WARN
T 320:15:25 0300 CO= 4.6 PPM
T 320:15:25 0300 RANGE=50 PPM
T 320:15:25 0300 STABIL= 0.0 PPM
T 320:15:25 0300 CO MEAS=4012.0 MV
T 320:15:25 0300 CO REF=3457.3 MV
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1) Is it possible to set the maximum number of characters that a string can hold?
Just like the following example from VB6:
Dim my_var As String * 10
2) I noticed that Option Base 1 does not exist. I created a table my_table(2) and tried to msgbox the following[code]...
Is there any container that would hold a number that is 10,000 characters in length? would I have to create one? If so how would I go about doing something like that?
View 5 RepliesI am trying to create a textfile and write some lines into the textfile. However, the code that i am using can only write when the textfile is already created in the directory.
For this case, can i actually allow my script to search if a textfile is being created, if not create a textfile ???
Dim pathdir As String = "C:workingdir est.txt"
If System.IO.File.Exists(pathdir) = True Then
Dim objWriter As New StreamWriter(pathdir)
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I want to user to enter only numbers and characters in textbox i.e no special charaters.I don't want to use key press event of textbox.As i need same validation in gridview.
So i want to validate whole string.
Is there a way to allow the user to only type in a certain number of characters in a datagridview column? Like a invoice number can only be 1-6 digits long and I want to stop them from typing more than 6 digits.
View 7 RepliesIn order for me to increment a Number, It's just too easy.Here's How to Increment a Number.[code]
View 5 Replies
