Update Streamwriter Into A Listbox?

Sep 13, 2011

i tried but the problem is that when i restart d program, the last added item is only displayed, the whole data in the stream is not displayed. here is what i did

Private Sub Button3_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button3.Click
myconnection = New SqlConnection("server=NXT\SQLEXPRESS;uid=;pwd=;database=paints;Integrated security=true")


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ListBox & StreamWriter & StreamReader - Reads All Line Of The File And It Add An Item In ListBox For Line?

Aug 25, 2006

I have a "Form" with:

1- List Box

1- TextBox

3- Button

1- OpenFileDialog

1- SaveFileDialog

I want that clicking the btn1 it shows the OpenFileDialog and read file that it has got this structure: SKI10 1 71 0 0 18 101 19 0 29 101 30 0 40 101 41 0 50 101 51 0 62 101 63 0 81 101 82 0 95 101 2 0 0 95 165 3 0 1072 01 4 2 1 93 15

I want that it reads all Line of the File and it add an Item in ListBox for line.For example the first Item of the ListBox in this case is


And the 2th Item is in this case.

0 1 7

I want using the StreamReader classes.And i want that when i click an Item of the ListBox it shows the Text in the TextBox and I can edit the Line and that clicking antoher button the Item will come updated with new Text of the TextBox.I have also another button for saving the Mod.I can use the AppendText and it create a new file writing ListBox1.Items line for line.

If SaveFileDialog1.ShowDialog = Windows.Forms.DialogResult.OK Then Dim file_esistenteD As StreamWriter[code].....

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Streamwriter And Strange Charactors - Opening The Streamwriter With Different Character Sets As The Third Parm?

Apr 21, 2010

I am taking in two html files and creating one out of them. To do this I am opening the first html file and not writing out the closing </body> and </html> tag and opening the second file and not writing out the corresponding opening tags, as well as the <style></style>section. I start a streamwriter, and write the lines out to it, and then close the streamwriter. My problem is that the output file is filled with strange characters. I've tried opening the streamwriter with different character sets as the third parm, but all this does is change the characters to different strange characters.It says charset=windows-1252 at the tops of the input files (and the output files for that matter - since I'm just reading stuff in and writing it out - with the exceptions mentioned above).Questions;First, do you think I am properly approaching appending two .htm files together?Second, how can I eliminate these strange characters.


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Listbox - Add A Record And Then Directly The Listbox Will Update As Well As In The Delete

Feb 24, 2012

i successfully load data from database to listbox, what i want to do is to add a record and then directly the listbox will update as well as in the delete.


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Update Info In Listbox?

Apr 29, 2009

I have 2 forms 1 that shows a name in a txtbox and Scores in a Listbox and the other form takes the selected score when you press the select button and you can change. Now I have it to where the old score is removed but when i replace it with the new score it doesnt appear in the same spot as the old score.[code]...

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Update Listbox During A For Loop?

Apr 18, 2012

I have a program which I'm designing to help organize and move some of my music around. I can create a play list and then add music to it, when I do this it copies the mp3 files to a specified folder and also updates a listbox with the content of that folder.

The code works, however when I run it the program locks up until everything has been copied, the listbox goes from blank at the start to suddenly showing the whole list.[code]...

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Update Listbox From Backgroundworker?

Feb 22, 2012

I have a backgroundworker doing everything I want it to but I cannot seem to figure out how to get a listbox in the Windows Form to update from the worker. I have tried an number of things and have looked high and low, but I seem to be missing something. Is there a simple way to do this? here is a bit of my code:


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Update Listbox Like The One In Start>Run

May 24, 2009

How do i create a list box like the start menu>run command where as the user types a directory name the drop down displays the content of the directory and keeps on changing as the user types.

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Loop Through Listbox To Update The Items?

Jun 9, 2011

I have a list box where the user can add choices depending on what items they want active in the database but I cannot figure out how loop through this listbox to update the items.

Visual Studio 2010
Dim lstitem As String
For i = 1 To ListBox1.Items.Count()


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Update ListBox With TextBox Text

Feb 6, 2010

I want it to update the selected item in the list box with the text from different text boxes and 2 combo boxes. The text of the selected item is split by "|" in different text and combo boxes.


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Update The Listbox Without Repetition Of The Same Item?

Aug 27, 2011

i have a listbox which can be updated. and another listbox with some denominations concerning the first listbox. i am populating the listbox directly from the database. each item in the first listbox have many denominations given in the second listbox. the problem is when i add new items into the database, the items of the first listbox repeats. so in ma updated listbox, the items get repeated. how can i avoid this repetition.


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Forms :: ListBox Doesn't Update Contents

Nov 29, 2010

I have a form called 'Bookmarks' that loads a bookmark file that contains a single word on one line. I have put buttons on the form for sorting this list, deleting items and changing the character case to lowercase, uppercase or Sentence Case.Now, deleting and sorting the list works fine, but when I try to change character cases,nothing happens. I started the debugger and found that my case changing code does work, but the listbox doesn't seem to update it's contents.I tried listbox.Update() and listbox.Refresh() but that didn't work either.

Here's my code for 'Set Case':

Private Sub setCase_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles setCase.Click
If bookCase = "default" Then Exit Sub
If bookCase = "lower" Then


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Interface And Graphics - Listbox Update Item

Jul 3, 2009

On my form is a listbox. When the user clicks insert (in the menu) then I add a blank item in the listbox. The user then enters the data and then I want to update my listbox with the value(s) the user entered. The problem is that I don't see the update in the listbox, unless I reload it from the database. [Code]

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ListBox Update As Data Added To Database?

Jan 15, 2012

I have a form where i can enter new product. In that same form i have listbox where i show the current product from the database.

I want to know how to update that listbox as i enter new product into the database so that user can see the current content of the product table.

my code to load the listbox

Dim ds As New DataSet
Dim cmd As New OleDbCommand


To sum it up, what i want is something that will refresh the current display of the listbox so user can see the actual and updated contents of the database.

with the above code, the newly entered product/data can only be seen when the program is closed and reopened again. Which is not very convenient.

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Update Listbox On Radio Button Change?

Feb 12, 2011

I am trying to update the values in my listbox as the user changes radio buttons rdMachineHome or rdIncremental. Are there any shortcuts or do I need to write everything over as an option?

Private Sub rdLength_CheckedChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles rdLength.CheckedChanged
Dim Length As Decimal


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Update ListBox When Entry Is Added To Database?

Jul 29, 2010

Display a Dialog Box that asks for some user input. Take that input and add a new entry to an access datatable. Refresh a List Box that displays the Keys from the datatable. Steps 1 and 2 work just fine. After the following method is executed (without closing the program) I can open the Access Database and the data has been stored to the datatable.[code]...

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Update New Total After Subtotal Has Been Deleted From Listbox?

Mar 6, 2011

I dont know how to get the program to do the total calculation after i delete an item from the listbox. Basically i have 2 forms. One is the shopping item list and the other is the shopping cart.

Here is my codes:

Public Class Form1
Public totalBuy As Single
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click


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VS 2008 Update/change Data In Listbox?

Jan 16, 2012

I cannot figure out how to change the data in a listbox. I'm being driven completely mad by vb.net, finding it very very complicated.

Ok I have two list boxes on a form that contain correlated data i.e. the first item in the first list box corresponds to the first item in the second list box.

Under the two list boxes I have two text boxes for data entry.

For Example :
LstTagDatabaseLoop LstTagDatabaseSource
TxtTagDatabaseLoop TxtTagDatabaseSource

I want to Add Update and Remove items from the list. If the user selects an item, I want the selected item in the other list to change to correspond. I also want the two text boxes to be udpated with the currently selected item.


however this invoked the selectedindexChanged sub umpteen dozen times and while in the end it did actually update the data, its obviously not the right way.

I found ListViews which perhaps is more appropriate but I couldn't get my head around it at all so returned to trying to use these listboxes. Is there a different object I should be using.

I'm finding vb.net to be too complicated for a hack programmer like myself...

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.net - Why Does ASP ListBox Take So Long To Render In AJAX Update Panel

Dec 3, 2009

I have a problem when updating the source of an ASP ListBox in an AJAX update panel. When I set the source of the ListBox to a large dataset, I would assume it would take a small amount of time to render due to the number of items. However, when the DataSource is switched at run-time to a smaller set of items, it takes just as long to clear it. If you go from a small set of items to a small set of items this is lightning fast. Maybe I'm doing something wrong. I'm using the Visual Studio 2008 item template for an AJAX 1.0-Enabled ASP.NET 2.0 Web Application. I downloaded that from Microsoft.

Here is my code (Full source zip below):

<%@ Page Language="vb" AutoEventWireup="false" CodeBehind="Default.aspx.vb" Inherits="TestingAJAXComboLoadTimes._Default" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">


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Forms :: Automatically Update Value When A User Changes The Listbox Item?

Feb 17, 2009

how can i automatically update my value when a user changs the listbox item. At the moment i have a button click when the user changes the list box item and press the button the values get updated, everytime the listbox item get changed i have to repeat it click the button to update the value. I want something where automitically as soon as the listbox item selected the total value in the text box to change without clicking the button:

Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
If ComboBox1.SelectedItem = "Seafood" Then
TextBox1.Text = 3.5 * ComboBox2.SelectedItem


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Update The Contents Of A Listbox By Replacing The Currently Highlighted Entry With A New Value?

Mar 22, 2011

im trying to update the contents of a listbox by replacing the currently highlighted entry with a new value so far i have found the following to start off column1 is my listbox


but it keeps saying "Value cannot be null. Parameter name: value" for the first dim. how can i fix this? or this there another way to call the selected item without this complicated

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Create / Update A Text File Using Each Item In A Listbox As Lines?

Mar 15, 2009

I've been pondering upon my idea on how to create/update a text file using each item in a listbox as lines, but I fail each time. I've searched this forum as well as my friend, Google. Still nothing.

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VS 2005 - Where Clause In The Update Statement While Selecting The Listbox Item

May 12, 2009

i'm doing a desktop application using VS2005 with MSSQL 2005. i have a problem with the where clause in the update statement while selecting the listbox item. this is the code for the listbox in load page:


and this is my update query in the delete button event handler: mySQL = "update Appointment set recordStatus = 'deleted'" how do i put in the where clause in when i have 4 columns in the listbox? so can i do this with listbox or have to do with datagridview?

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DELETE And UPDATE Access Database After Remove Selected Item From VB Listbox

Jun 6, 2011

I trying to make a code to Delete and Update Access 2007 database after remove a selected item from a listbox in VB 2008. [using "Remove" button that i create] pervious i already make a button to View data from database and Remove from listbox. but i don't know how to delete and update in database.

The code i using now:


In the database, i have ID,Name and Age (simple database)

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Forms :: Looping Through Listbox Making Calculation To Every Item - Won't Update New Result

Apr 6, 2009

i have 2 list boxes.. Qty and Cost both of these are populated from a sql database. The code is suppose to read through the listboxes and multiple the Cost by the Qty and then replace the Cost with the new result. The Cost listbox is populated with the cost of one item. The reason i am not doing this calculation in the sql query is because the sql query is very complicated filter out a bunch of stuff to show just the qty of the item...


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Trigger An Update Of Listbox From Another Action Which Sets The Source Drive And Folder?

Aug 17, 2011

I have a 'SrcDirectoryTextBox' which stores a folder nameThis folder name is read in from the .ini file I have created and works okI also have a srclistbox which is filtered by a *.fil (filetype)I can read in the ini file and display it, but how do I make the srclistbox trigger after the ini file has been read, so that it displays the filenames.

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ListBox PreferredHeight - Make ListBox Calculate Correct Integral Height Before ListBox Is Made Visible

Nov 19, 2009

If I set a ListBox.Height = ListBox.PreferredHeight when the control is hidden and IntegralHeight = True, then set it visible:

a) Actual Height reduces by typically 3-5 pixels after redraw (but not 1 pixel per item).

b) PreferredHeight does not not appear to give the correct integral of item heights.

Is there a way to make ListBox calculate the correct integral Height before the ListBox is made visible, so it can be correctly pre-positioned from bottom edge?

Private Sub Form1_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load

ListBox1.Visible = False
ListBox1.IntegralHeight = True


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Calling StreamWriter From WCF

Apr 28, 2011

I have a function which works great in my console app. But when I move it over to my WCF, it bombs out every time. Can't figure out what I'm doing wrong. Here's the operation contract:


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Using StreamWriter And StreamReader?

Jan 18, 2009

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].....

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Compile A Single ListBox On Form1 To ListBox On Form2 Then ListBox On Form3?

Feb 17, 2011

This code bellow to compile a single listBox on form1 to listBox on form2 then listBox on form3.

I want to modified this code to compile 169 of ListBoxs on form1 to 169 listboxs on form2

and 169 listBoxs on form3.Try this code,not need the new coding.

Original code from JoOl and modified by John Anthony oliver


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