What is the best method to get towards the end of a file in a Stream Reader. In my case, I have data at the end I want, but the rest of the data I don't need. If the file is very large instead of reading line by line until eof, is there a better way to get to the end?
View 2 RepliesI have a problem with a streamreader in visual basic 2008.I am updating a database from text files on an ftp server. The streamreader works fine until the file is more than 100,000 bytes long.It reads until it reaches this point and then just ends. No error message, it just reads to this point which happens to be 2 fields out of 6 in the database stream. My question is - does the streamreader have a limit? And if so what is a workaround?
Dim connString As String = "Data Source=" & pDataBase
conn = New SqlCeConnection(connString)
Dim strQuery As String = ""[code]......
I'm writing a program that basically loads an entire text file into a streamreader variable, then reads this variable line by line and parses and writes a line into a new text file. I'm VERY new and my knowledge is mostly self-taught, but I can't seem to get out of this one. It works for smaller files, but it appears to reach a limit in characters at some point because in a file of 900 lines, it stops writing about halfway through 800 and there are no errors, the program actually completes and the message box pops up.
There are a few things with this code I already know I should fix, such as creating the new text file name, it's messy, I just don't know how.
Private Sub btnProcess_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnProcess.Click
Dim IndexValues As String()
[CODE]...
I am using streamreader and streamwriter to read a text file , change the text, then write to the same text file. This all happens in a loop every second or so.Currently I use:
Dim csetpointfileread As New System.IO.StreamReader("C:webcsetpoint.txt")and Dim csetpointfile As New System.IO.StreamWriter("c:webcsetpoint.txt", False)before every file read / write operation, it gets dimensioned every loop. To me this seems like a waste, and should only have to be dimentioned once. If I try to run both statements in the beginning, outside of the loop, the second statement wont work because the "file is allready open". Am I missing something or am I doing it correctly to begin with?
im having problem with this code, what i want it to do it go on the site nd if it finds the word online it switches the text so say it directed to google and the word online is somewhere in the html code of the site, the app should then change label 5 to online BUT i get this error
"Could not find file 'C:UsersOwnerDesktopAMi BETAAMi BETAinDebugwww.google.com'."everything i want the notifyicon to do is working but i only want it to pop up once but every time the timer ticks it pops up
Private Sub Timer1_Tick(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles ServerStatus.Tick
[Code]...
How do I use line numbers? For example, I'm reading a text file and I'll need to get the line number of the line "=====LINE=====" somewhere in the text file, and I'll need to get the text of the next line (+1 of the previous line, but I'm not sure how to do readline(line number)).
View 12 RepliesIm having trouble with streamreader.. It keeps locking up the debugger after the first 3 lines.. The last line being blank.. There is basically a status readout screen that updates every second or so with statistics about the Video Stream in the FMLEcmd.exe program
View 3 RepliesI am doing an assignment for my programming class in which we have a text document full of names (one per line), and we set up a program with a textbox, button, and listbox. The user enters a name in the text box, clicks the button, and it searches the document for the name. If it's found, the listbox should say so and list the line number.I can get that working no problem, but the assignment also requires informing the user if the name can not be found, and I am not doing something right with that.My code is as follows:
Quote:
Public Class Form1
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
Dim inputname As String = TextBox1.Text
Dim linecount As Double = 0
If I remove the three bolded lines and it finds a name, it will work fine to the point that it informs as such and tells what line it is on, but it won't inform the user if a name wasn't found, which I need. I thought adding those three bolded lines would help, but when I have them in there, it will incorrectly display "Name not found. " no matter what name I type in the box, even if it is in the text document.
How do I use a StreamReader to read the data (from a text file), parse it, and place it in a two dimensional array??
The data:
0,710,887,1130,525
710,0,1510,1610,515
[code].....
I am testing code that recursively searches for files, reads them and determines if a user supplied text string can be found. I am getting Out of memory errors on files > 250 MB. The system has 4GB RAM and no other apps are running. Here is the section that throws the error. Other than this, the program seems to work perfectly. 250 MB files are OK, 275MB files are not.
Private Function FindStringInFile(ByVal FileName As String, ByVal SearchFor As String) As Integer
Dim strTest As String = String.Empty
[Code].....
I have a comma delimited text file with the U.S. States and their respective state bird listed in the following format.
"ALABAMA", "YELLOWHAMMER"
"ARKANSAS","...
"...
What im trying to do is parse the rows and send the parsed data to different comboboxes. I have a combobox for states and one for birds.I can load the file into the first combo box but im not sure how to parse and send the second column to the second combobox. here is what i have so far.
[Code]...
magine there is search box (textbox), and below there are a search button with a rich text box.My text file located in the drive C is like this: [code]I want to search only two types of items in my text file located in drive C, namely: Construction and Non-construction. When the user will type a product name, OR size, OR whatever, he must get results only for the Construction or Non-construction. The user must not get results for the Food. And the user can make misspelling of words in the search, so the Search box must tackle it. And yes, the results should appear on the rich text box on the form itself.What is the code of doing the Search according the criteria above? All I know I have made a srteamreader code but when clicking on the search button, it is giving me all the texts i wrote in the text files. However, I want only some lines to be read.
View 3 RepliesHow do I know if I have reached the end of file using streamreader. My file has a lot of empty lines in it.
So if it try to use the following, its just stops wherever an empty line appears.
[code] while ( Not line is Nothing) do.... end while [code]
Using vb 2010, How can I use the streamreader to read within a rtf file from one pt to another pt thus capturing specific txt then loading it into a datagrid
View 2 Repliesfor some reson stream reader is failing, i have made a simple program that creates opens and edits files but the open, save as is not working for some reson here is my code:
open:
Private Sub OpenToolStripMenuItem_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles OpenToolStripMenuItem.Click
Dim ofd As New OpenFileDialog
Dim fl As String
ofd.ShowDialog()
[code]....
using the StreamReader / StreamWriter code. I want to store a new password in a .txt document that will later be printed. Here is the code I have so far. The code runs but I cannot find the .txt document.[code].....
View 2 RepliesI am reading data from an API feed and saving the chunks into files. When the files reach 2 MB I start a new file and write to that file. What happens now is that an entry (<entry></entry>) can get cut off at the end of a file and continues into the new file. I try and reconstruct the files by taking the last entry and combining it with the first entry of the next file but this is tedious handling the data transmission and file creation.
Do
timestamp = DateTime.Now
numbytesread = responseStream.Read(bufferread, 0, BUFFER_SIZE)
If numbytesread > 123 Then
'timestamp = DateTime.Now
responseData = Encoding.UTF8.GetString
[Code] .....
I'm trying to use streamreader and streamwriter to get the data sent and received. For some reason the data isn't sending or receiving?
Server
Code:
Imports System.Net.Sockets
Imports System.Text
Imports System.Threading
Imports System.IO
[code]....
how does the streamreader read the file? how do you know where its up to? how does it read the file line by line, knowing where its read up?what program do you write so that it can read the file line by line and then put the text from the file into an array?
View 1 RepliesI made this tiny program that pulls in a text file data with StreamReader method. Okay how can I sort the text file alpahbetically A - Z while it comes in is this possible? [code]
View 3 RepliesI'm new Visual Basic. I played around with vba in Excel for about a year, but most of it was copy-clipping code that I found online and modifying it � which taught me the VERY basics. I was recently asked if I�d like to job shadow one of our programing consultants at my work and jumped at the opportunity. So my "mentor,� Temi, has been awesome in giving me some basics, and I've learnt more from spending a couple hours a day 2 days a week for the last month with him then I have since I got into this a year ago in vba.
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I need to build a program that combines many different .doc files based on which check boxes the user selects. At first I was going to use the word.document.open(file) way, but I would rather not have to open 40 different files every time the program runs. I then turned to streamreader, which works great for basic text (after I convert the file to .txt) but I can't figure out a way to maintain hyperlinks. I am now thinking that after the streamreader reads all of the data and combines it into one string, it will paste it into a word doc and somehow search for hyperlinks and make them active.
View 1 Repliesim tring to create a program where i could login from a ftp stored in a folder for an example here is my codeing
Dim USERREAD As System.IO.StreamReader = New System.IO.StreamReader("http://websiteurl.com/loginstore" + textbox2.text + ".uxd)
[code].....
Here is the code I'm using to write it[code]..
This is all I have to read it at the moment. The tutorial I was using to learn about sockets used this method to send strings - I was wondering if I could use the same method for bitmaps? How about wav files?[code]...
I have a csv file and I want to read the 2nd row into a string using a streamreader but not sure how to get to the second one on file?
The file looks like the following:
0001
0002
I want to read from textfilesin such a way that I can
extract text in the form of strings and
figures(numbers) and then calculate their respective
percentages. I have successfully done that with VB6 but
[code].....
Just a litte about me. Well, I am not intermediate but I am not a beginner either. And I like to try to do my own work as much as I can. I am not a mooch just to let you know.
I made this tiny program that pulls in a text file data with StreamReader method. Okay how can I sort the text file alpahbetically A - Z while it comes in is this possible? and how do I do it, I have no clue.
I am creating a recipe program that will allow the user to save recipes in an external file, retrieve them and work out a new value for ingrediants depending on how many people they want this time. However within my code errors keep appearing and I cannot work out why they do.
Imports System.IO
Public Class Form1
Dim Unit, nameofrecipe, nameofingrediant, oldrecipe, recipewanted, filecontents As String
Dim quantity, originalamountofpeople, newpeople As Integer
[code]....
I have the following code;
Public Sub writetofile()
' 1: Append playername
Using writer As StreamWriter = New StreamWriter("highscores.txt", True)
writer.WriteLine(PlayerName)
[code]......
I am having problems getting my program to write to a txt file and also read the info in the file.The program does look for the file and throws an error if the file does not exist but it does not read or write the user info from/to the file. The program does everything else I need it to with this exception.[code]
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