Questions tagged as 'vb.net'

Tagged questions
2
answers

Connection to SQL VB.net

On a simple page in VB ASP.NET I get an error with the SQL connection:    The multi-step operation of OLE DB generated errors. Check the OLE DB status values if possible. No work was done. I am new in the VB language, I leave a sample of...
asked by 19.12.2016 / 02:46
1
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Handling Threads in a DataGridView in VB .net

I am automatically and manually updating a datagridview with data every so often. For this, I delete all the rows and insert them again manually with programmed data. I do not use any database or table. The problem is that I'm with a thread t...
asked by 28.12.2016 / 19:50
1
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Add rows to an asp datatable filled from a database

In my application I have a data table that I filled from a database registry, taking the following method: Public Shared Function RetData(query as String) As DataTable Dim conn As New Connection() Dim tabla As New DataTable() Try...
asked by 19.11.2016 / 16:20
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Problems with DevExpress

What happens is that I'm working on a web application that includes DevExpress in version 15.1.7.0 and I get an error when compiling:    Compiler error message: BC30009: Reference is required   to the assembly 'DevExpress.Data.v15.1, Version...
asked by 14.11.2016 / 20:58
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Intervals to execute System.Threading.Thread.Sleep

Visual basic is driving me crazy. I'm trying to control an application already open by sending keystrokes. The code is as follows: Private Sub Form1_Load(sender As Object, e As EventArgs) Handles Me.Load Dim seqc As Process seqc = New...
asked by 05.09.2016 / 18:35
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How can I know if a date is a date? (VB.NET)

My intention is to know if the data that the user has entered, is date and that it is in the MySQL ( YYYY-MM-DD ) format. First I made a query with data type date to a table of Excel , but it turns out that when doing a test to see what...
asked by 15.08.2016 / 22:51
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SerialPort.Read () does not end

I'm trying to know the position of an engine through a COM port thanks to the method Read(Byte(), Int32, Int32) Whatever the serial port, when I try to read with SerialPort.Read(buffer,offset,length) , it never stops returning....
asked by 03.08.2016 / 08:01
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How do I fix this error in Access and vb

I need help with the following error in the following images the code in which the error occurs is displayed     
asked by 23.07.2016 / 05:01
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Learn Serial Port StatusInfo on vb.net

I try to establish communication between two computers connected by serial port (COM). To open the port I do it like this: Dim puerto As IO.Ports.SerialPort = Nothing Me.puerto = New IO.Ports.SerialPort Me.puerto.PortName = Me.cmbPuertoCOM....
asked by 25.05.2017 / 13:15
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ASP.NET VB web 3 layers when publishing the entity is not defined

Hi, I'm doing a web application with vb.net in 3 layers. I have the entities, data and business projects, and one asp web application. Each project has the reference of the others added, and in local it does not give me any error, but w...
asked by 28.06.2016 / 07:34