Writing To Output Text File Only If All Fields Are Valid
Apr 15, 2012
I have a form that validates a users info, address, phone, etc. I want to have the form submit the data only if all of the fields are valid, but haven't had any luck. Right now the fields are able to validate but the form submits the data to the text file regardless of whether the fields are valid or invalid.
Here is my code
Imports System.Text.RegularExpressions
Imports System.IO
Public Class Form1
Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
End Sub
[Code] .....
How to create an if then statement to only submit the form when the data is valid. I was thinking I might have to set up a separate function but I'm not sure how to set it up really.
Background: I'm writing a application that will allow users to enters items on a form using textboxes, radio buttons and checkboxes. I then take each input item and write it to it's own arraylist. After the user is all done entering data the information in the arraylists will write out to a single .txt file.
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?
Write a program that requests a color as input in a text box and then determines whether or not the color is in the text file. The program should use the Boolean-valued Function procedure IsCrayola that returns the value True if the color in the text box is a Crayola color.
ok i have a comma delimited text file with two fileds. I am loading the first field which is strings into a checked list box based on a open file dialog prompt. now when the user clicks a button i want it to be able to increment the second field(which isintegers)of the corresponding string field index by one and save the file. i am very confused on how to even start this.
Using Visual Basic 2008 express, I would like to access a database with 2 tables, one table (useraccounts) which has Users and Password and ID, and the other table which has information (linktable). Basically I would like to do a login form which reads from the table useraccounts and be able to create new users which will write into the database.
Another is that I have a form with a number of links which I would like to store in the table 'linktable' and it basically just gets the links from the table and straight to the form where it is used. I have tried using access or the .mdf files that visual basic has but I have been unable to find an answer for either.
I wouldn't mind using either access or the .mdf file for the database, I would just like it to work. Overall I am trying to get: Login form which reads from database table 'useraccounts' and has a new user feature Just a form that can read / write to the database once the save button is clicked.
This is my first post in the community. I am putting together a program that serves two functions:1. Takes input from TextBoxes and writes it to a text file.2. Takes the text from the text file and displays two specific strings of text in a MessageBox.This is the code for the button that writes the input to file.
Private Sub facSubmitButton_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles facSubmitButton.Click Dim facultyRecord As String = "C:\Documents and Settings\All Users\Desktop\teeny.txt"
When using .write method the string will be stored at the end of the text file. Is there a method that adds them on top? If not, how can I get this done without using too much memory and processor time?
I have just recently been using VB 2010 after using VB5. I have noticed a lot of changes. The problem I have is that I wish to open and save text files to and from arrays in the background. I've attached what I would do in VB5. I have searched around, but all the examples I find use a Textbox instead of an array. Can anyone show me how I can do this with VB 2010?
I am creating a text file using a save file dialog and copying the path to the text box which file is used to write from vb.net. when i try to write i get an error "The process cannot access the file '....fileName.txt' because it is being used by other program".
The code is below
Public Sub writeInTextFile() Try Dim oWrite As New StreamWriter(TxtOutputPath.Text)
I am attempting to gather a group of file names from a directory. I am able to do this. I tested the code by having the list populate into a listbox and all desired items were added to the list.
Here is my code: Dim di As New IO.DirectoryInfo(strPath) Dim dir1 As IO.FileInfo() = di.GetFiles("*.txt") Dim dFiles As IO.FileInfo ListBox.Items.Add(dFiles)
However, a listbox is not my desired output. I am attempting to write these file names to a text file for purposes of then parsing the information to a datatable to compare with another datatable. How to get my filenames written to a textfile.
I am attempting to Query xml data using LINQ, then put the results into a stringwriter which uses an xmlwriter.[code] It errors with "Token EndDocument in state Document would result in an invalid XML document."Now oddly if I take the writeenddocument out the results is written first and then the writestartdocument xml.How can I create an xml document using the LINQ XML, stringwriter and xmlwriter?I was wondering if it is actually possible.
I currently have a system that saves student data to a text file. I can search for individual students and have their information output to screen. How can I make my system output every student in the text file to screen?
I am trying to pull sql data into a text file. The code works just fine, until some new data comes in from lazy employees and a couple fields (used for notes/comments) are now left blank. Originally I've never seen them blank so I didn't think anything of it. col2 = myreader.GetString(1) It will error if the field is ever null - I even tried using a case when: case when note is null then '" & empty & "' else note end and set the variable emtpy = '', but vb still thinks that it's null and errors?
I am writing an application that must generate a plain Text file with fixed sized columns.my current code is:
Dim MyFilePath As String = Path & FILE_PREFIX & FileNr & ".TXT" IO.File.Delete(MyFilePath) Dim FileStr As New IO.StreamWriter(MyFilePath, False, <ENCODER HERE>)
I want to write a line into a text /.cfg file. the line is = name "ishtiak", i need a space between name & "ishtiak". the text "ishtiak" is loading from a textbox called textbox1. i don't want in the text box my name like this "ishtiak" it will be without "" like this ishtiak but in the text file it will add "" before & after my name.
so the question is: 1.how to add space between name & "ishtiak"? like this = name "ishtiak". 2.My textbox text will be ishtiak,but it will be written like this "ishtiak" [Code]
We have some information that we need to write (about 18KB) to a .txt file stored in one of our network drives. The file is re-written about once every 15 minutes but is read practically at least every second. We are currently using StreamWriter to write file.The file server is in remote location and the round trip ping varies from <1ms to 15ms.
The problem is, sometimes it takes as long as 6 seconds to write the contents to the file, which is definitely way too long even after we take consideration of the network speed. therefore, I am just wondering if there is any efficient way to write the file using VB.Net to improve the performance? Java has a very good tool named BufferedOutputStream, which unfortunately is not available in VB.Net (or I just have not found it).
Application log file have been created to monitor the process and following code has been used to write the log information into text file. For the first time there is no error encountered when the application runs for hours, may be 3 hours i am getting following error "An unhandled exception of type 'System.StackOverflowException' occurred in mscorlib.dll" [code]...
I want to write some stats to a text file every time a person loads a page. But every once in awhile I am getting at 'Could Not Open File, Already in use' type of error. I can not 100% replicate this error it is very erratic. My code is
Public Sub WriteStats(ByVal ad_id As Integer) Dim ad_date As String = Now.Year & Now.Month Dim FILENAME As String = Server.MapPath("text/BoxedAds.txt")
[Code]....
how can I lock and unlock the file so I stop getting the erratic errors?
Im working on an assignment for school and i have to write my schedule to a file using input boxes, also i have to use a structured array on the assignment. Both of these i have working fine.I just have one problem, my formatting such like when i write to the file it doesnt look all nice and straight and when i read from the file its uneven also. I know its because the classnames/teachernames are different lengths but i was wondering if anyone could explain to me how to format it to make it look nicer in the text file, and when its displayed on the form in the label
Im working on an assignment for school and i have to write my schedule to a file using input boxes, also i have to use a structured array on the assignment. Both of these i have working fine.I just have one problem, my formatting such like when i write to the file it doesnt look all nice and straight and when i read from the file its uneven also. I know its because the classnames/teachernames are different lengths but i was wondering if anyone could explain to me how to format it to make it look nicer in the text file, and when its displayed on the form in the label. ( i only use 1 label to display the schedule. )
heres what i have
Public Class MainForm Structure Schedule Public period As Integer
In the following, Response.Write poduces the expected result of displaying user name and password - but nthing is written to the text file (colocated in the root directory).[code]...
In the following, Response.Write poduces the expected result of displaying user name and password - but nthing is written to the text file (colocated in the root directory).
Imports System Imports System.IO Partial Class getCustomer
How would a person read a line of a text file by the number of the line. In other words, if I wanted to get the 3rd line of the file, how could I store that third line in a variable. While I'm at it, I might as well also ask how to do the opposite, or write text to a specific line (in this case, writing over the other information on the chosen line).
I have five column in my datagridview. I want to write the contents of datagridview to the text file. let say i enter this values to the gid view
T C F S H 1 2 3 4 5
it should be save in text file like this T1C2F3S4H5
This is my codind so far.Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click Using theWriter As New System.IO.StreamWriter("c:Drill Layer Header.txt", True) For Each row As DataGridViewRow In Me.DataGridView1.Rows theWriter.WriteLine(String.Format("T{0}C{1}F{2}S{3}H{4}", _ row.Cells(0).Value, _
[Code]...
My problem now is everytime i save data from datagridview to text file after it save the content the, in the last line in text file it add line like this TCFSH so my text file look like this
