Delete The First And Last Lines From A Text File In Visual Basic?
Jan 20, 2010
I've seen posts on deleting the lines from a text file that are specified as a function parameter, but I only need to delete the first and last lines from the file.
I'm still a newbie when it comes to working in files, but it seems that it should be simple to delete the first line... Just delete all text from BOF to the first CrLf character. Am I right?
As for the last line, I understand that I'll have to get a count of the lines in the text file to find it (as the file won't always be x amount of lines long).
I have a text file containing lines of data (File 1). I need to delete all the lines in another text file (File 2), which are found in file 1.So I could read file 2 line by line. And then once the line has been read, read file 1 line by line to search for a match. But that's going to be painfully slow.Or I could read file 2 into memory. And then read file 1 line by line and REPLACE the lines in file 2 with nothing, therefore deleting them. File 2 could be 100 mb, so I'm not sure about reading it all into memory.
i want to delete an item on a listview, this is my code
If ListView1.SelectedItems.Count > 0 AndAlso MessageBox.Show("Do you want to delete this item?", "Confirm", MessageBoxButtons.YesNo) = Windows.Forms.DialogResult.Yes Then 'make sure there is a selected item to delete ListView1.SelectedItems(0).Remove() End If
now my problem is i want to delete that item on the text file line
i want to delete few lines from a big text file , normally this lines are at the starting of the text file , so it is possible that i can enter the line no from input box and the vb.net can delete that particular line number from the text file ,
I'm working on a practice exercise to convert a XML file to a text file. Here's the code;
Function XML2Text(xmlNode As Variant, Optional recordQuery As String = "*", _ Optional propertyQuery As String = "*", Optional filename As String = "", _ Optional Delimiter As String = ",") As String Dim buffer As String Dim recNodeList As IXMLDOMNodeList
I am working on a program for the Windows Mobile 6.0 system and using Visual Basic 08. I would like for the current txt file that I have, that is formatted as follows: "NOR400","277225","ZIMA 4/6 12OZ NR BOTTLES","07199077603",21.65,"cs",7.19,"pk","C4/6PK","12 OZ "
to be imported and each item in the line will be assigned to its own txt box. I have been able to load up the file, in to one txt box, but am unable to separate the items in to their own box. Should I be using arrays for this?
Ok, so I'm making a program that will read from a text file, convert each line into an array, the. Send each of those lines 1 per tick. This is in 2010 Visual Basic. Closest I've gotten is sending all at once, I worked on it over night and am slowly destroying it. Ideally, I want Button 1 click to populate the array from the file at LocationTB then start the timer. The timer should send a line at a time on the GapTB interval.
Public Class Form1 Public TextLine As String Public MyFileName As String
I've been trying to print out a text string to a printer that I have connected. I cannot print using the PrintDocument.Print() as this sends the string as a graphic to the printer.I don't know C# and I am very new to full fledged VB having spent most of my time using VBA in Excel
I display a Chart with several graphic lines on it. What I want to do is draw a line (using the mouse) overtop or below the chart such that it can be seen on the chart. The mouse line draw code is below. What is required is either make the line always be on top or make the chart transparent. I don't know how to do either and I don't know if it is possible in Visual Basic 2010 as it was in VB2.
Private Sub frmComDashBrdGraph_MouseDown(ByVal sender As System.Object, _ ByVal e As System.Windows.Forms.MouseEventArgs) Handles MyBase.MouseDown If e.Button = Windows.Forms.MouseButtons.Left Then
I need a small app that randomly shuffles a set of preloaded numbers. The shuffling will be visible on the screen and goes on continuously (looping) until a key is pressed and as soon as that happens it will show the winning number.Am using visual basics 2008 to develop the application but my problem is when i start the app and hit a key it will loop through my numbers on the text file and it will also display the event but if i hit a key to stop it will not stop..I was workin on the app but my problem is how to stop the loop and resume on the with a keypress. below is the app codes.
Dim Running As Boolean = False Sub ReadAccounts() Dim arr As New ArrayList arr.Add("1366-665885-666-22650")[code]....
I am making a invoice system in Visual Basic 2010 and i am stuck here Here is my code
Private Sub btnDelete_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnDelete.Click For Each row As DataGridViewRow In datagrid.SelectedRows Dim selectedindex As String = datagrid.CurrentRow.Cells(0).Value.ToString() datagrid.Rows.Remove(row)
[Code]...
This code is not working well please have a look to my invoice screen shot and suggest me a better code
When i try to delete the selected row the code does not work and if any one can tell me i can delete multiple selected rows? they are deleted from the datagrid but not from database
Tools for my website.Visual Studio 2010SQL Management Studioasp.netvisual basic.netI am using GridView. Because of my search code I am not able to use the automatic delete function that GridView has to offer.I clicked on GridView, said "Add New Column" and added a checkbox column.I want to be able to check one or more boxes and select a button that will delete those rows from the database using a stored procedure.
I have written a simple script to get a bunch of lines from a text file (they will be filenames eventually) which are split by new lines and puts each one into an array..
Dim ary() As String Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click If My.Computer.FileSystem.FileExists("C:MenuFiles.txt") Then
[code]....
The only thing I can do for now is either use the substring function to remove the first character from all array values after 0 but I don't like that because it's messy and what if the split "works" as I want it to one one of the lines and knocks of the first character when I don't want it to.
I am writing a visual basic.net application to pass remote shell command through command prompt. I need to get the text response after the rsh command is executed. My program codes can only get the output 'C:>' text (see below command prompt window display). Is there any solution for me to get the 'Permission denied' text as well?
Program codes: RshProcess.StartInfo.FileName = Environment.SystemDirectory & "cmd.exe" RshProcess.StartInfo.Arguments = "rsh..."
I'm stuck on this exercise that asks me to create a text box and a button. Each time the button is pressed it is supposed to add 1 to the text box. Anyone know how to approach this?
I was wondering how you can add text from a text box to a database (table in visual basic). I've been looking all over the web, and i haven't found anything.
I am reading a temperature value from a transceiver into the serial port and I want this value to change the value of a label in my Visual Basic Form. This value changes every few seconds. I am using the code below:
Me.dataReceived.Text &= [text]
where dataReceived is the label I am using and [text] is the data I am reading from the serial port. This results in the data being displayed but instead of overwriting the label, it writes the value after each other. (The data is appended). I tried to remove the & before the = but this did not work as nothing showed up.?The code I am using is the following:
'To receive data into the text field Private Sub SerialPort1_DataReceived(ByVal sender As Object, ByVal e As System.IO.Ports.SerialDataReceivedEventArgs) Handles SerialPort1.DataReceived
I have a web page that has a few text fields, and a reset and submit button. I'm having trouble getting the reset button to work to clear the text fields because the required field validators and regular expression validators are blocking any code in the reset button's click event from occurring. how to get the validators to not activate when the reset button is clicked? One method I tried was to set the enabled property of all the validators to false in the reset button's code block but no luck.
I had following coding to make form have aero glass effect. but the text is become transparent too when i run it. how to make the text become no transparent? Thnx
<StructLayout(LayoutKind.Sequential)> _ Public Structure MARGINS Public cxLeftWidth As Integer
What is the code to replace text in a document. For exaple if my document had the text "The Dog Jumped over the fence" how would i get it to change to "The Cat Jumped over the fence"
I am writing a math game for my brother in Visual Basic to help him with double digit numbers(both adding and subtracting).Normally you solve a problem by writing right to left on a piece of paper. Is there any way of setting the text box to do this?
For Example:
58 + 18
You would type in the text box '6' followed by '7' so it would read '76'I set the right to left property but it does not do what I want it to do.
I've created a table in SQL and inserted specific information into it programmatically. Now I need to export this whole table data, including headers into txt file (tab delimited)- from within Visual Basic project (Windows type application).
