vb.net

Error "Settings to access printer 'printername' are not valid" when printing from Windows service

I get the error mentioned when printing to a network printer. The error does not occur when run under XP/Win2003, in a WinForm app or when a local printer is used. The error does only occur when run as a Windows Service under Vista/Win7/Win2008 and printing to a network printer. The Windows service runs under a network user that has a...

My pay pal button will not link to pay pal. It only refreshes page, why?

I have the following code in my registration page to go to a paypal button. But when I click on the button it just refreshes the page. Is their something I am missing? I should be able to include a paypal button on an aspx page right? <asp:Content ID="Content1" ContentPlaceHolderID="head" Runat="Server"> </asp:Content> ...

Is it possible to restrict instantiation of an object to only one other (parent) object in VB.NET?

VB 2008 .NET 3.5 Suppose we have two classes, Order and OrderItem, that represent some type of online ordering system. OrderItem represents a single line item in an Order. One Order can contain multiple OrderItems, in the form of a List(of OrderItem). Public Class Order Public Property MyOrderItems() as List(of OrderItem) End...

Background worker not working right

I have created a background worker to go and run a pretty long task that includes creating more threads which will read from a file of urls and crawl each. I tried following it through debugging and found that the background process ends prematurely for no apparent reason. Is there something wrong in the logic of my code that is causing ...

Python Regex To VB.net

Hi everyone, I made a program in Python and now I whant to transfert it to vb.net. But I have some difficulties with the vb.net regular expression.... Someone can help me please? There are my Python regex: id = re.search('(?<=watch\?v\=)[\w|-]+|(?<=/v/)[\w|-]+', src) id = id.group(0) t = re.search('(?<=\&t\=)[\w|-]+', src) t = t.group...

Creating a Contact form in Visual Studio ASPX and saving to an XML file when clicking SUBMIT

hey people hope all is well.. i am trying to create a form in VS using ASP that when upon submitting a form the details will get automatically stored in an xml file which can be accessed later on a chosen file save path i have 2 files ... "Contact.aspx" and "Contact.aspx.vb" i have created the form in the "Contact.aspx" and when tryin...

ASP.NET radiobuttonlist onclientclick

I've noticed there is no OnClientClick() property for the radiobuttonlist in the ASP.NET control set. Is this a purposeful omissiong on Microsoft's part? Anyway, I've tried to add OnClick to the radio button list like so: For Each li As ListItem In rblSearch.Items li.Attributes.Add("OnClick", "javascript:alert('jon');") Next But a...

VB .NET DirectCast and Type Reflection

The application that I am working on has a generic Parent Form called RSChild, that is used to perform some operations depending on whether or not the control that is contained within it is in a MdiTabManager or inside of its own modal form. Then the actual User Controls contained within Inherit from a Interface Called ObjectEdit (Object...

trim last "," delimiter of a string in vb.net

this is my code - With ad.Tables(2) For i As Integer = 0 To .Rows.Count - 1 If .Rows(i)("name") & "" <> "" Then temp &= .Rows(i)("name") & ", " End If Next End With temp = temp.Trim(",") testing &= "&Name="...

What Date Format Should I Send When Using Oracle.DataAcess.

Converting from usind Micorsofts Syste.Data.OracleClient to what I believe is called Oracles ODT (Oracle.DataAccess 10.2.0.100). When I try and send a date I get this error "ORA-1858: a non-numeric character was found where a numeric was expected". This code worked great using System.Data.OracleClient. cmd.Parameters.Add(New OraclePar...

Invalid cast exception

I have a simple application to store address details and edit them. I have been away from VB for a few years now and need to refreash my knowledge while working to a tight deadline. I have a general Sub responsible for displaying a form where user can add contact details (by pressing button add) and edit them (by pressing button edit)....

stop overwriting an xml file

hey from my previous question.. ive managed to finally get it all working... if i click submit.. a file is then created in xml format but if i enter new data it will overwrite the same file how do i stop this.. this is the code i am using Protected Sub btnWriteXML_onClick(ByVal sender As Object, ByVal e As System.EventArgs) T...

Passing Byte (VB.NET)

Hi I need to pass encoded string to php page. To convert string to iso: Dim result As Byte() = Encoding.Convert(Encoding.UTF8, Encoding.GetEncoding("iso-8859-1"), input) I have this code to pass string, but how I must do it to pass Byte (variable result) instead of the string (variable MyVarString)? Dim client As WebClient Dim dat...

FormView templates break when refactored to Master/Content

Let's say I have an abstract class IA, with subclasses A1, A2, A3. For each subclass, I had a page with a FormView to insert/edit/view, with code specific to that class. The templates for insert/edit/view are all very similar, so it was mostly cut & paste, and the compiler had no problem that there were controls with the same IDs in t...

Asp with vb.net codebehind, httpfilecollection loses data

I have an html input that i use to upload files. Now on my page when I try to authenticate a user first, and hide the div that the controls are in for my file uploads, the collection is empty. When I dont use runat = "server", it works as expected. Not sure how to get around this. Code: Here is what works...but without hiding... not wha...

Gridview inside a ModalPopUpExtender causes ModalPopUpExtender to close

I have a gridview inside a ModalPopUpExtender, the grid view have the button add delete and edit when i clic one of the button of the gridview the popup is closed. I wont to close the popup when the close button is clicked. This is the asp.net part: < cc1: ModalPopupExtender ID="NamePopup" runat="server" PopupControlID="OptionPanel" T...

driver license scanning in vista using vb.net

I have a sdk for scanning driver license (cssn -- ScanShell 800DXN) It is working in xp but not working in vista. i don't know what is a problem in vista, anyone know please help me ...

Algorithm - combine multiple lists, resulting in unique list and retaining order

I want to combine multiple lists of items into a single list, retaining the overall order requirements. i.e.: 1: A C E 2: D E 3: B A D result: B A C D E above, starting with list 1, we have ACE, we then know that D must come before E, and from list 3, we know that B must come before A, and D must come after B and A. If there are con...

"SQL Server does not exist or access denied." upon VB.Net Deployment

Have built a small VB.Net app in VS2010. The connection string to the SQL Server is as follows: <connectionStrings> <add name="IWSR_DataDownloadWizard.My.MySettings.sqlConnection" connectionString="Provider=SQLOLEDB.1;Data Source=SQLServer;Integrated Security=SSPI;Initial Catalog=IWSROL" providerName="System.Dat...

C# Object Declarations

Are there any overheads to using the following sytax: Form1 myForm = new Form1(); myForm.Show(); As opposed to: Form1 myForm; myForm = new Form1(); myForm.Show(); When I was learning VB6, I was told doing the quivelent in VB had an overhead - is the same true in .NET? ...