SQL Possibly Not Returning Values For A Query In Visual Basic?
Jun 29, 2010
In my code I enter a string in a text box and have the query check the server for the entry. If it exists it returns the string and the date into two separate variables. The database only has TrackingNumber and Date. Below is the code. As of right now i get "Invalid attempt to read when no data is present." at the "If (sdr("TrackingNumber") IsNot Nothing) Then" line.
Public Function CreateSqlParameter(ByVal name As String, ByVal dbType As DbType, ByVal direction As ParameterDirection, ByVal value As Object) As SqlParameter
Dim parameter As SqlParameter = New SqlParameter()
[Code]....
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Sep 25, 2009
I use LINQ but I am not an expert.. still learning as well on vb.net and sql
I have tables Orders and Numbers
Orders Table:
Order_ID -primary key
Date_Ordered
[Code].....
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Jun 28, 2010
i am working on this code that is going to query a database for an entry and return the value of the tracking number and the time to print on a label if the tracking number exist in the databse. it does not right now it only seems to reprint the number that is enetered in a text box and it does not grab the date. here is the code.
Dim TrNum As String = Me.DupTNText.Text
Dim TrDate As <=something if it is even needed
Dim connectionString As String = "Data Source=XXXXX;Initial Catalog=YYYYY;Integrated Security=True;Pooling=False;Encrypt=False"
Dim cmdText As String = "SELECT TrackingNumber, Date" & _
[code].....
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Mar 19, 2012
I am making an address book for my final project in school, and have a few questions. In my address book, there is a feature to add groups so you can sort your contacts. The problem is, the add group feature is in a different form, I tried calling a procedure from the parent form to refresh all data but it does not work.[code]
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Apr 20, 2012
I am trying to make a project for point of sale and i am having issues with updating inventory table. once cashier make sale items quantity should get subtracted from inventory table. i tried bellow code but it is not updating table, however in message box it does give me new quantity for that item.
[Code]...
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Sep 25, 2009
I'm an undergraduate student from Singapore University, would like to enquire you on how to convert character codes to ASCII codes using visual basic. regarding the codes on how to build it as I need it for my semestral project
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Sep 24, 2011
I wanted to know how to write a query in data grid control. So far I've seen alot of forums but they are related to either 2008 vb or vb 6. how to write a query in the datagrid control which will search for an id in the database of access and present it.
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Apr 4, 2011
In this application I need to allow users to enter a month as integer (1-12) then use integer tryparse to validate that input, that seems to be the easy part. I need two create two functions, one that returns the name of the month and the other returns the number of days in that month. The arrays are supposed to be defined and initialized within the function so that the main program can take the user input and call the two functions, then return the appropriate values as output to labels. I am not sure how to declare the arrays in their appropriate functions and then how to call those functions to retrieve the right value from the function.
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Jan 24, 2011
How do you extract source code from a VB.NET .EXE file?
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Mar 15, 2012
I am messed up with the below query[code]...
but when i run the query in my project the reader in not reading correctly...even if values are present is returns false and if values are not there then it returns true.
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Apr 25, 2009
I'm trying to query a remote machine and get the cpu percentage similar to task manager.. I have the following code:
Code:
im wmiK As New WMI
Private objMgmt As ManagementObject
[code].....
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Jul 3, 2010
I need to write a paper on the comparison between (Microsoft Visual studio 2005 to develop web applications using asp.net) and (visual basic and Netbeans to develop j2ee applications using java).I need suggestions for good webpages,journals or documents which can help me out here. I have to write at least 1500 words so any suggestions are welcome.
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Jan 17, 2011
In a while loop, I am writing a progressively increasing integer value (between 0 and 100) to the Value attribute of a ProgressBar control, when it disappears from the window in which it resides. I have verified at the time that it disappears that the Min is 0, Max is 100, and Value is a valid integer in range.
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Aug 5, 2011
Does anybody know which version of Visual Studio 2010 contains the full set of Visual Basic SharePoint Templates? I am about to embark on a project to create Visual Web Parts to be used in a SharePoint report.
At the moment I am using Visual Studio 2008 and even though the WSPBuilder is installed none of the relevant SharePoint templates are present.Having searched SO and the web, most advise to install the templates via the Visual Studio command prompt: devenv /installvstemplates
Alas the Visual Studio command prompt is also missing from my VS2008 installation.So, the question remains: which version of VS2010 contains what I need for pain-free SharePoint development? There is a rather large price different between VS2010 Professional and VS2010 Premium, so can anyone tell me if the cheaper version (VS2010 Professional) contains all the Sharepoint templates?
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Mar 20, 2009
How do I disable the background compiler for Visual Basic in Visual Studio 2008?
For my sins, I have to work on a large VB.NET project and it often locks up for 20 seconds at a time whilst doing the very helpful background compilation
I'd rather work blind between compiles and be able to do some work.
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Nov 25, 2009
I am just wondering how I can add Direct X references to Visual Basic in Visual Studio 2010 Beta 2. I cant find them in the .NET reference list, or the reference list, or anywhere. I downloaded the Direct X SDK for August 2009, but I can not add the .dll files to the reference list. Is there anything I can do to add them? I need the references for programming reasons.
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Jan 22, 2010
I am trying to make a console program in Visual Basic on Visual Studio 2008. I want to ask the user of the program if he wants the premium version or the standard version. If he chooses the premium version, then I want it to say premium in his "receipt" later on and if he chooses standard, then standard in the receipt.
[code]...
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Sep 26, 2009
I have Visual Studio 2008 Professional and I'm trying to make it so I can click a button to send the application to the System Tray and then click the icon in the System Tray to make the application come back.
Can anyone provide me a method or sample code to do this?
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Jan 25, 2010
when the user clicks on the add button another form launches, which enables the user to add student info such as name, address, course, start date and end date, this information is then written to class when the ok button on that form is clicked, and then displays the data on the initial form in data grid. the user can add multiple entries and they are all displayed on the intial form and a the data grid is populatedwhen any of the rows in the displayed grid is selected, and the update button is clicked then the same form launches as the previous one and but this time its in the update mode and pre populates the form with the inital values.
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Jan 13, 2012
I am very new to Visual Studio Application Development. I'm mostly a DB guy. I used Visual Studio as a Report Designer, not much of an .Net guy though I can understand it. I am now asked to create a .net application and I'm trying to create a "Hello World" starter app. I opened my Visual Studio, click File-New Project and all I see is Business Intelligence Projects and Other Project Types. My step-by-step guide says choose Visual Basic, Windows Forms Application. But I can't see it as an option.
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Jan 31, 2010
I have visual studio 2008 installed and was using C#. I am now trying to find Visual Basic. I can't find it. Is there a way to download it or should it be somewhere in my visual studio program? I don't want to use vbexpress, just regular VB 2008.
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May 22, 2012
I recently loaded my copy of MS Visual Studio 2008 Standard Edition, with Visual Basic, on to my new laptop, one with a Windows 7 operating system. This version of Visual Studio had been on my other laptop, a Windows Vista machine. When I attempt to run any of my Visual Basic applications which has a MSFlexGrid container on it, I get this error message "Unhandled exception has occurred in your application... The error is: Class not registered (Exception from HRESULT: 0x80040154 (REGDB_E_CLASSNOTREG). Also,
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Dec 9, 2009
I am using: (copied from the/about vb studio window:
Microsoft Visual Studio 2005
Version 8.0.50727.762 (SP.050727-7600)
Microsoft .NET Framework
[code].....
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Jan 15, 2012
I want to use "OpenGL" in my project. Is it possible to associate it with "Visual Basic" application developed in Visual Studio 2010? If yes then how can we do it.
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Dec 19, 2009
whilst trying to debug a sample program, get error code bc 32400. Also error code Class 'CLSID_CorSymWriter' could not be created system error &H80040154&
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Jan 22, 2010
I have the follow Linq query that is in a web application that was converted from .NET 1.1 to 3.5:
dim objListOfFilteredDataRows = from datarows as datarow in objDataSet.tables(0).rows _
where datarows("SomeColumn") = SomeValue
I have the exact same query in an application that was created using .NET 3.5 and the query returns an IEnumerable. However the query in the converted application is returning:
{Name = "WhereEnumerableIterator`1" FullName = "System.Linq.Enumerable+WhereEnumerableIterator`1[[System.Data.DataRow, System.Data, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089]]"}
**Edit: When I highlight the expression, the intellisense says that it doesn't know the type of objListOfFilteredDataRows and assumes its a type of "Object". Why is the type not infered in the converted 1.1 application but is infered in the "native" 3.5?**
What am I missing here? How do I convert the "WhereEnumeratorIterator`1 to an IEnumerable?
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Mar 5, 2011
I have a query using LINQ-to-SQL. It queries an underlying database table Rooms. It uses Where conditions to narrow down the results, namely:
Gender.Current Occupancy < Max Occupancy Available Flag is Checked I know this should return results but it keeps returning an empty set.Code is below
[code]...
UPDATE: I've verified that the issue is with the statement where sh.is_available = 1, which doesn't make sense since this is a bit field.
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Apr 28, 2011
Just a quick question about LINQ, I want to use a value from the returned dataset to lookup a value and return this. The line I am struggling with is .ViewingNotes = NewViewing(pt.ProspectId).GetViewings().Columns(7).ToString(). Is this possible?
With BusinessLayerObjectManager.Context
Return (From p As [Property] In .PropertySet
Join pt As Prospect In .Prospects On pt.Property.propertyID Equals p.propertyID
[code].....
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Jul 20, 2011
I'm doing some XLINQ in VB for work. I basically need to pull some values from a small chunk of XML as listed here:
<?xml version="1.0" encoding="utf-8"?>
<Fields>
<typeQtyRadioButtonList>1</typeQtyRadioButtonList>
<cmbQtyCheck>Reject</cmbQtyCheck>
[code]....
... Leaving out the implementation of the For Each loop....So I have stuck a break point on the for each and the collection has no elements in it.
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Jul 26, 2011
I'm trying to run a query from a search form by date and I'm receiving the following error:[Teradata Database] Partial string matching requires character operands.The code for the search is:
ElseIf OptDate.Checked = True Then
sSQL &= "DATE_SUBMIT Like ('" & txtDateRec1.Text & "%')"
End If
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