Questions tagged as 'vb.net'

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Search error in mysql with visual basic .net

Good day, Send me this error    executereader the connection property has not been initialized the error sends it here%% of% Private Sub btnAgregar_Click(sender As Object, e As EventArgs) Handles btnBuscar.Click If (validarCampo...
asked by 17.10.2018 / 15:01
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Consume WebService created in JAVA from VB.NET you eat attributes

I am using VB.NET 2008, creating an application where I intend to consume routines from a Webservice developed in Java (an eFactura provider). Of those N routines that are available, I can use any of them without problems. But there is one in...
asked by 24.10.2018 / 22:12
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I can not invoke a rdlc Report Nor Crystal Report on Asp.net

I apologize for the inconvenience that I am still new to I am but I need your help I am trying to show a web report on asp.net from vb, but I have not achieved it because the report can not be called from a Method or of a class I can not pass va...
asked by 16.10.2018 / 16:27
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Disable Protected View in Excel from Visual Basic

When downloading the excel I have to configure the blocking options to be able to edit on the excel. Configuring the following: Click on Protected View Click on the red circle There is some property to enable from the code, so tha...
asked by 04.10.2018 / 18:53
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How can I make a validator for each field in a form

I'm doing a form where you should not be able to write until the previous field is not filled and so on until the end, I have about 9 fields. How can I do that validator?     
asked by 28.09.2018 / 09:03
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How to use a TextBox for different SQL Server operations?

I am using WebForms, for the platform that is already working correctly in the work, in conjunction with VB.NET, I have a question on how to work with a single text field, and, in turn, the same Text field can work to store different information...
asked by 28.09.2018 / 19:58
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What version of Crystal Report is for Visual Net 2012

Good morning Experts, I am programming in 2012 VisuaStudio.Net and Sqlserver 2012 ... install 4 pc a program everything runs perfect they can quote and this is saved in a pdf in a default folder, the error occurs later when I install in the 5...
asked by 27.09.2018 / 14:14
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Blink problem when loading form

I am doing a program in which I am uploading different forms in a panel. But when I load them, the screen flashes several times and it is very annoying. I used the DoubleBuffered=true but nothing. I'm thinking of using panels directly but...
asked by 24.09.2018 / 06:45
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Generate PDF tags with VB.NET

My problem: I want to generate some more or less tags like this image , from 2 to 3 columns. From the data of a ListView I try to create the labels but I do not know how to format them, since the only thing I have achieved is to print the da...
asked by 01.10.2018 / 18:54
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Converting ASCII code extended to character

I have a program in VB.Net that reads from the serial port the characters that come to it: serialPort = My.Computer.Ports.OpenSerialPort(leerPuerto()) serialPort.BaudRate = 9600 serialPort.Parity = IO.Ports.Parity.None serialPort.StopBits = IO...
asked by 03.10.2018 / 15:51