Questions tagged as 'vb.net'

Tagged questions
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vb.net- An exception of type 'System.Data.Entity.Infrastructure.DbUpdateException'

I created a delete but when I run the error it gives me: An exception of type 'System.Data.Entity.Infrastructure.DbUpdateException', I have looked for help, but everything that appears is for #C, I need a solution for VB. I think the probl...
asked by 03.11.2017 / 17:53
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DropDownList Error System.NullReferenceException 'in VB

I need to create a function to introduce a new defect, which is associated with one or several processes (for now I have not figured out how to select several), but I want the processes to appear in a dropboxlist, and it worked, the problem is t...
asked by 24.10.2017 / 16:48
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PrintPreviewDialog in browser

I have the following code in an MVC project inside a cshtml: var w = window.open('', "print", "height=400,width=600"); w.document.write(json.html); w.document.close(); w.setTimeou...
asked by 25.10.2017 / 19:11
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DropDownList with multi selected

I have a table defects and one of processes, and a defect can have one or several processes. For now I have to work a dropdownlist for a defect, a process, what changes I need to make to be able to select several processes, follow the code below...
asked by 25.10.2017 / 17:51
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Check if WebBrowser is 1 min without browsing

My program is a macro that fills a form in a site over and over again, only sometimes it has some problem and some field is not filled in and the process is not going to continue. I want, for example, to be shown a message if the webbrowser stay...
asked by 23.09.2017 / 19:50
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System.NullReferenceException

There is a webservice that I need to create which needs to have some peculiarities, among them, the information of SoapAction (as below). However, when I place and debug I already get the error when testing the contents of the variable "orderID"...
asked by 13.09.2017 / 14:39
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Read XML and create objects using LINQ in VB.NET

With the following code below: <?xml version="1.0" encoding="UTF-8" standalone="yes"?> <escuelas> <escuela> <estudiante>noe</estudiante> <fechaCreacion>2017-11-21T00:11:26.748-05:00</fecha...
asked by 21.11.2017 / 06:19
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Alternate WebBrowser that rotates recent pages

I would like to know if there is any control for the .NET platform that runs current pages without giving errors. I already searched YouTube on Google, but I never think so. Awesomium.NET does not change. GeckoFX is outdated, and any other I can...
asked by 28.07.2017 / 23:44
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how to record the result of an image and a label in a single file?

I'm making a small pogram to make memorials in photos is a label and a picturebox how can I record the label along with the image box image for a single image? This is my code. Imports System.Diagnostics Imports System.Drawing Public Class Fo...
asked by 27.07.2017 / 01:13
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Print text in ASCII

Good afternoon, I'm trying to print a text (ZPL Code), but in my code there are ASCII delimiters, and for this reason it does not generate correct printing, ie missing certain characters. Does anyone know any method to generate printout containi...
asked by 19.07.2017 / 23:58