i have a text file contains delimited records.
1243;jhhf';982u4k;9u2349;huf8
kij;9238u;98ur23;jfwf;03i24
i need to replace the value of 4th part from every record with the value returned from database or someother source.
I'm trying to create an application that reads in a log file, then converts each line to a class(I'm databinding a datagrid to the finished ObservableCollection).The implementation I've done but I'm struggling to reduce the time it takes to itterate the lines and convert them to classes.small log files are fine its the larger log files (25k lines +) which is my concern. I'm wanting to do this with say a max delay of around 5secs from loading the text file.my current implemenation of a log file I have of size 85k lines is several minutes which isn't great.
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I have a text file contains delimited records.
1243;jhhf';982u4k;9u2349;huf8
kij;9238u;98ur23;jfwf;03i24
I need to replace the value of 4th part of every record with the value returned from SQL database (Select X from T where C='4Th part from the flatfile').
i am using vb.net 2008 what i want to do is 1. send a selected list of records (with about 10 or 11 fields each) in a text file 2. this text file will b used by another prog. and it will add some data at the end of each record. 3. these additions r to be used by me again by reading it from the text file and then updated again in my database
i have gone through a lot many text file handling eg. but not able to understand what ihave to do.
i know i would somehow have to get the fields in parts but cant get how lset will give me the entier string till a fixed length which i can use for the first field but how do i jump to the 2nd field and so on
pls. note that i cant give any spl. character to diffrenciate the end of 1 field and start of 2nd field.i have to gather and send the fields for each record just 1 after the other.
I'm making a custom control that needs to look like a Text Box but I can't Inherit Directly from text box since I need to add, Change and Override so many things that it would be more practical to just inherit Control and start new.
But now my question is: Is there an easy way to create the basic functionality of a Text Box like drawing the Text Box and handling input ?
I want my program to be able to create a '.txt' file when it is run for the first time, with the date and time the program was accessed, and to be able to add new 'logs' of program history every time it is accessed. What i mean is that i want my program to be able to create a '.txt' file, and then fill in the dates and times when the program is opened.
View 7 RepliesI have written a MDI Text Editor and I have written sub routines for print preview, cut, copy and so on, when testing my program, I click print preview when there are no documents active and the program crashes, the same happens with cut, copy, paste.
I know this is because I have not handled any error exceptions, the truth is im not sure how to.
I have got the code that makes print preview work with my mdi documents, but what code can I use or how can I add it to my existing sub routines to possibly show a message box saying something like "This Function Cannot Be Used With No Active Documents" something like that.
Could I use an If Statement? or Try, Catch, Block? - I am using a different computer as I am currently at work but if anyone needs the code I currently have for my sub routines.
what is code i should use if i want to prevent user not to leave empty word in text box after user click save button.Oh ya, i am using visual studio 2005, databse sql 2005 .Here is my code
Private Sub btnregister_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnregister.Click
If MsgBox(" Are You Confirm", MsgBoxStyle.YesNo) = vbYes Then
[code].....
I am just for learning purposes trying to develop a one player text based game.
I have a rich text box (GameWindow)
I have a text box (InputWindow)
I have a button (InputButton)
and a bunch of labels that aren't really important
I have two questions first is easy probably. How do i get InputWindow to respond to me hitting enter when text is in it?
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But if i plan to have more that is only going to increase the size and code needed and im sure there is an easier way i just don't know how to do it.
Suggestion in either in C# or VB.NET is acceptable.
I have a class to handle file download link ASP.NET project like the following:
Public Class AIUFileHandler
Public Shared Sub DownloadFileHandler(ByVal fileName As String, ByVal filePath As String)
[Code]....
for the program I am creating I want the computer to check if the configuration file has been created or not. I wrote this function to do that but I don't how to handle a file exception. Here's my code currently but obviously it returns an error if the configuration file doesn't already exist. So how do I add a check for an exception?
Public Function CheckIfRunBefore()
Dim ConfDirectory As String
ConfDirectory = ""
Dim StreamReader As New IO.StreamReader("C:\VRAI\Conf.txt")
[code]....
what is code i should use if i want to prevent user not to leave empty word in text box after user click save button. i am using visual studio 2005, database sql 2005.
View 2 RepliesCurrently to check if a file is in use (before attempting to move or send it by FTP etc) we try and open it with exclusive right and trap the System.IO.IOException that would occur if anotehr process is reading or writing the file.
However - how can we do this without the bad paractice of using an exception handler for unexceptional process flow?
How to update a record in file handling?
View 2 RepliesI was wondering if there was a way to catch all unhandled exceptions in a visual studio project. My project does not have any files named global or global.asax so I was wondering if there was some other way to catch any and all unhandled exceptions? So far I've tried to put exception handling around specific blocks of code, but it doesn't have any effect.
View 3 RepliesI have one combobox, two buttons (Add and View) and listbox. When I click button Add text from combobox is added to text file. This is code for Add button:
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i want to take a comma delimited text file and then select all unique records based on one of the fields in the text file. should i read the text file into a data table or just use a data reader?
View 7 RepliesHi, i'm trying to use the treeview to display the text of a rtf (rich text file) file when an specific node if clicked.HomeOMGWOOTFor example, if i pick OMG, i want the text of lol.rtf to be displayed on a richtextbox. But somehow i just can't manage to get it... I know to import the text of a .txt file to a textbox, but using the treeview makes it more complicated.This is the code im using right now:
Private Sub TreeView1_NodeMouseClick(ByVal sender As Object, ByVal e As System.Windows.Forms.TreeNodeMouseClickEventArgs) Handles TreeView1.NodeMouseClick
Select Case e.Node.Index
Case 0
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Another thing is, that i can't import the *.rtf text into a richtextbox and i don't know why.
So I'm in the final stages of finishing a program I've been working on for nearly a year now, and this is basically my final hurdle. The Save dialogue is working beautifully, with 'flags' in order to switch it over from the regular input into text boxes to the Listbox input protocol.
However, I'm having a *** of a time getting it to take lines from the text file and put them in the proper text box. Here is an example file:
Quote:
SHOWNAME
CALLNAME
BREED
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So with the sample file I provided above, in the textbox named callNameText would appear "SHOWNAME", and so on and so forth. With this build, I get a NullReferenceException on the "Me.Controls(strboxNames(i)).Text() = strAllText(ati)" line.
i'm trying to use the treeview to display the text of a rtf (rich text file) file when an specific node if clicked.HomeOMGWOOTFor example, if i pick OMG, i want the text of lol.rtf to be displayed on a richtextbox. But somehow i just can't manage to get it... I know to import the text of a .txt file to a textbox, but using the treeview makes it more complicated. [code] Another thing is, that i can't import the *.rtf text into a richtextbox and i don't know why.
View 3 RepliesOk so I have a combo box that lists a set of names. What I want to do is match a selected name to a text file and read from it. The text file contains the same name and has grades listed below:
ex.
Johnny Bravo
30
10
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?
I save data from datagridview to text file. I also load the same data from text file into datagridview for edit and update the same thing to text file. Let say this text file i called as Drill.txt. I have another text file called header.txt which need to match its value with the value of Drill.txt file then overwrite value from Drill.txt to header.txt. Now i want to make my Drill.txt in encrypted format to prevent anyone to open that file and modify out of program. They only can modify it through the program
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i have 5 textboxes in a form. I have a streamwriter that writes all of their text to on text file like this:
Code:
Dim xfile As String = Application.StartupPath & "/Set.txt"
If File.Exists(xfile) = True Then
Dim writex As StreamWriter = New StreamWriter(xfile)
[code]....
I was wondering how to get the text under the each number and place it in the corresponding textbox.
I am using a thread to call a process which is spliting a text file into various text file and folder using the system.io , now when calling the Textsplit() with thread on click of a button i am getting the error below , how to use thread and why this error occurs.
Cross-thread operation not valid: Control 'txtbox_destn' accessed from a thread other than the thread it was created on.
I am trying to ping a text file("C:/Domains.txt") which is a list of domains, then have the resulting IP address written to a different text file ("C:/IP_Addresses.txt"). And this action will be done with a Button_Click.
View 8 RepliesAll I would like to do is remove one character from the line of the text file that I am reading, which is the first character and also prevent the program from crashing if no text file is present.Here is the code. Can anyone notice where I am going wrong? I thought the "if" statement would cover the crash but it didn't. Clueless, but sort of have an idea on the character removal.
Private Sub RadioButton_CheckedChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles RadioButton.CheckedChanged
Dim fileReader As System.IO.StreamReader
Dim lineRead As String
If RadioButton.Checked Then
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what would be the optimum code in VB2010 that check a file to determine:
1) is it a text file, and
2) if it is a text file, does it contain any non-ASCII characters
Note that LF, CR, and EOF would be expected, and should not be flagged. I can think of 3 - 4 ways to do it, but there may be a 'best' way in terms of simplicity and speed.
i need to search through the host file on pc to check whether entries contained within another text file are in the file.
View 1 Repliesmake the text in a text box into a text file that auto-creates in a specific?
View 4 Replies