[vb.net] Forum Topics

Hello guys, I'm working on a VB.Net Project. I'm using MS SQL Server as my backend. I can create Purchase/Sales Voucher forms and many more through the VB.Net Database EXpress. Say for example I have created a Purchase Voucher form where the user can enter the vendor info (in TextBox …

Hi! I have this code from the internet but it didn't work well. I want to set the margin of the Report Viewer during runtime. Because I have this form to fill up. Instead of handwriting it. I programmed it. But there are certain positions of the textboxes in which …

Error : Object referrence not set to an instance of an object Situation; I have an array declared publicly (i.e. outside any events) as Public Shared array_shuffle() As Integer What I want to do is to be able to specify the length and elements of this array from inside events …

I'm having a hard time in grouping my data via ReportViewer. My friend told me to use List in grouping but I don't have a clue on how to do it so I'm requesting help from you guys if you can teach me. Thanks

Is it possible to re-detect serial port without unplugging it

i m try to vb.net 2005 in my final year project' but i have a problem in the button to "save" record in database "con" have error what will help me about that problem???

Sir I am facing problem,I want that when I open my form then select combo box value and by combo box my bellow grid and text box fill...but it is showing coding problem,so please guide me. What can I do? Regards: Asghar

It is possible to Enable or disable the comport in device manager

I'm creating a custom control panel to replace the top border control panel/box. I start with a panel that docks at top of form, and add 3 pictureboxes, with light and dark colors, for when mouse enters. (optional 4th for docking options) My problem is the red_pb ("Form Closing" picturebox) …

Hi, I wanted to update a table in access db using right outer join.I created a temp table,copy the structure from the destination table and used it to store values from an excel file.And using right join tried to update the destination table making the temp table as a source.It …

Hi guys, I need your help, I'm working on my vb.net application as I want to click the button on the webpage when i click on the form button, but I'm having a problem with click the button on the webpage as it will do nothing when i click on …

I'm somewhat new to deploying ClickOnce manifests, first off. I know the basics of how to publish to an app server, which then lets every use the newest version (after setting to check for updates before running the application). We have multiple VB.Net applications stored on our app server, that …

Hello everyone, I am attempting to make a custom control similar to a tooltip however I am not sure exactly how to produce the effect I desire. My goal is to have a popup, which is shown when the mouse hovers over a control, that contains some message and is …

i want to develop my website so i want to know what programming language is the best PHP or VB.NET?

I have vb.net application with MS access database. I use following code to autocomplete textbox from database. the problem is that, although its working but more frequently it gives an error "AccessViolationException was unhandled----Attempted to read or write protected memory. This is often an indication that other memory is corrupt." …

Im just curious what is wrong in my code, when i click the void button an error is shown, but it runs smoothly when the void button is not click. Here is my code, thanks for your help guys! Public Class Pizza Private Sub rdPrimo_CheckedChanged(sender As Object, e As EventArgs) …

I want a set of not the same numbers to be added to a listbox, if there are any numbers that are the same, then they won't be added. I tried: If (Number1 = Number2) Or (Number1 = Number3) Or (Number1 = Number4) Or (Number1 = Number5) = False Then …

This is my code Dim dblPrice As Double = 0 Dim dblTotal As Double = 0 Dim strTotal As String dblPrice = CDbl(txtPrice.Text) intQuantity = CInt(txtQuantity.Text) dblTotal = (dblPrice * intQuantity) strTotal = Format(dblTotal.ToString("N2")) If chkDessert.Checked = True Then strTotal += 5 End If If chkDrink.Checked = True Then strTotal …

Hi guys, I need assistense in comparing whether values of a listbox and datetime picker are not equal. thanks.

Is there a way to catch whether a certain message has popped out. I tried: If MsgBox("Well done!", MsgBoxStyle.OkOnly, "Amazing") = Visible = True Then Me.WindowState = FormWindowState.Maximized End If

hello members am learning vb.net and i request assistance with dotnet toolbar soft ware thanks in advance

I dont know the code! PLS HELP!!! I want to create a program that scan QR Code and Display the value in a textbox in VB.NET

Hi guys, I'm having some problems with sum of array values and I hope you can help me out. I have a form from which there are multiple values added and saved to txt file. Than on button click, these values are read from txt file to array and shown …

Hi, I've been trying for days now to figure out a way to open a local file in WebBrowser, in an Input File, without using a file dialog. I want to be able to submit a filename stored in a variable to the <input type='file'> without triggering a dialog box …

Good morning guys, once again I'm an annoying problem. I am making an application in Vb.Net, which has a database with several geographical coordinates so I retrieve the images of each record in coordination with a marker on the ground and in GoogleMap, is the problem, I could do it …

On a phone keypad, each of the digits 2 through 9 has a segment of the alphabet associated with it. How does one write a program that displays the associated numeric digit given an alphabetic character.

I've made a timer and six labels. Then a number is being generated for each label seperately. After testing how it works, I found out that sometimes two same numbers are being generated at the same time. In the picture attachment you can see how two numbers were generated at …

Hi! Can someone explain to me this set of codes? i've been converting numbers to roman numerals using those codes, but I don't quite get it, or maybe something is wrong with the codes? Private Function FormatRoman(ByVal n As Integer) As String If n = 0 Then FormatRoman = "0" …

Hello I am using the following try | catch to locate an error: Try Using conn As OleDbConnection = New OleDbConnection(System.Configuration.ConfigurationManager.ConnectionStrings("students").ConnectionString) Dim Sql As String = "INSERT INTO university (username,[password], strEmail) VALUES (@username,@password, @strEmail)" Dim cmd As New OleDbCommand(Sql, conn) conn.Open() cmd.Parameters.AddWithValue("@username", username.Text) cmd.Parameters.AddWithValue("@password", password.Text) cmd.Parameters.AddWithValue("@strEmail", strEmail.Text) cmd.ExecuteNonQuery() conn.Close() End …

I'm simply trying to keep a log list for my application events. I'm trying to send text to the log from a seperate thread with the following code: Imports System.Threading Public Class Main Private worker1 As Thread Private Sub Form1_Load(sender As Object, e As EventArgs) Handles MyBase.Load worker1 = New …