Accessing Database In Windows 7 / MS Visual Studio?
Apr 30, 2011
I developed a small application which accesses a MS access database on my computer using VB.net. I developed the program on windows xp 32 bit. At the moment I am using windows 7 64 bit and the program simply will not run. I get a null reference exception when I try to do anything to the database. I have narrowed this down i THINK to the db provider. I was using Provider=Microsoft.Jet.OLEDB.4.0; and tried using Provider=Microsoft.ACE.OLEDB.12.0;. Neither seems to work. The path to my database is 100% correct. This is the error I am getting:
Null reference exception was unhandled.Object reference not set to an instance of an object.
Like I say the program runs fine on the windows xp machine. If it helps the access database file extension is mdb.
I'm doing a project with vb.net (smart device) on visual studio 2008 and I need to connect to a database on the device itself (I do not have a physical device to test, only emulation). How should I go about doing it? I would like the database to be in the device on start up.
I'm not sure of the syntax necessary to access a class's attributes inside of a Dictionary declaration.
[Code]...
So if I want to test it and use MsgBox() how do I trickle down to pull, say, name in food > cheese1 > info > attributes2 > name?
EDIT:I just realized that Array in info needs to be a Dictionary for an associative array, so please ignore that error and just assume it is a Dictionary for this question's sake.
I have embedded the WMP control in my Visual Studio 2010 app which works on windows 7 (Framework 4.0), but installing the app on winXP, I get the following error:
System.IO.FileNotFoundException: Could not load file or assembly 'Interop.WMPLib, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null' or one of its dependencies. The system cannot find the file specified. File name: 'Interop.WMPLib, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null'
[code]....
WRN: Assembly binding logging is turned OFF.To enable assembly bind failure logging, set the registry value [HKLMSoftwareMicrosoftFusion!EnableLog] (DWORD) to 1.
Note: There is some performance penalty associated with assembly bind failure logging.To turn this feature off, remove the registry value [HKLMSoftwareMicrosoftFusion!EnableLog].
I guess this is a reference issue, but I have added references to WMP libraries (axinterop.wmplib.dll and interop.wmplib.dll). The WMP works on the XP machine, but not when called from my application.I have searched the web now for 5 days and changed references, and reinstalled the media player on the XP machine, but nothing works.
Our company developed a tool developed in Visual Basic and VBS using Visula Studio 2005. The tool was deployed on Windows XP platforms. Now the new requirements for the tool are to support both Windows XP and Windows 7 64-bit I wonderif anyone can share which version of Visual Studio should we use.
In VB (Visual Studio 2010) i have written a simple coin flip routine and use the code below to display the image of the coin based on a random number 0 or 1
coin = Rnd(1) 'random head or tail head=1 tail = 0 'display relevant image of coin If coin = 0 Then
[Code]....
but can't seem to find a way to display the appropriate image. Is My.Resources not available in the Windows Mobile SDK or is there a different method.
I am teaching myself how to work with Visual Studio and adding windows media player so I can play a song but when I follow the code that is the the MSDN under " How to play audio files by using Visual Basic .NET or Visual Basic 2005 I can only get as far as this statment
AxMediaPlayer1 As AxMediaPlayer.AxMediaPlayer I get this error "property access but assign or use its value" I have no clue what it means and I have looked at several treads on MSDN but am still a bit confused as to what I am doing wrong or what I need to do to make this work Private Sub loadButton_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles loadButton.Click
I installed Visual Studio 2008 and MS-Office_Access under Windows 7 Professional (64-bit) on my new computer. I copied my MS-Access database and my VB project to the new computer. MS-Access works fine.In Visual Studio 2008 an error message appears below my VB project's source coding."Unable to find manifest signing certificate in the certificate store."If I execute my program in debug mode and override the error message, it fails to open the MS-Access database and shows the error messageL:"The 'Microsoft.Jet.OLEDB.4.0 provider is not registered on the local machine."
Q1. Why am I getting the message about 'mainfest signing certificate'?
Q2. How can I register the 'Microsoft.Jet.OLEDB.4.0 on my machine?
Am very new to programing and have never done it before.I am working on very small things at the moment like showing the time and date very basic stuff. i have some books and video's so am going over but i just need abit of code for now -
How can i display what version of windows i am running? for example.i have a button if i click it the label on my form will display the version of windows.
I have a problem here... I'm using SQL Server as may database and developing that database in Visual Studio 2008.my problen is, when I use the STORED PROCEDURE from SQL SERVER it doesn't update/save new data on a the table. here's my coding; This is my stores procedure: when I execute this on on SQL SERVER it worked perfectly.
I produced an MSI for a small VB.net application I need to run on an Intermec 730 pocket PC but get the message "Setup is not a valid Pocket PC application" when trying to install it. What do I need to output the project in the correct format? I've tried changing the target platform but it only has x64 and x86 listed.
Is it easier to print a VB.net windows form in Visual Studio 2010?
I have been struggling with this - the PrintForm utility in the Powerpack only prints the displayed portion of the current form.
I spent a lot of time creating a process which loops through each control on my form, converts to a bitmap, and drops it on the print document, only to finally discover that the RichTextBox control (which I used extensively) does not include a functional DrawToBitmap method.
I have already researched various ways of managing this, but if VS2010 will do it without jumping through the hoops then I'll spring for it like the sucker I am.
I can do this in Access and VB6, I believe, so I don't think this is an unreasonable expectation.
i have installed visual studio 2010 32 bit on my new computer which have windows 7 64 bit. Everything seems ok. But now I try to learn how to draw some spheres with movement. I have tried to install openGL2 but it does not work or said that it does not fit with 64 bit, or it works only with VC.
Could any one, please, give me a short introduction to install and use open GL in vb.net 2010 installed on windows 7 64 bits ?
my app currently has a process thats ongoing (even when I navigate back to the main screen of my app). Is there any code I can use to terminate all the processes on that page before it navigates back to the main screen. In other words the page should reset to its original form?
WebMatrix is a web development and deployment tool by Microsoft so how is this compared to Visual Studio? which Use C# Razor Syntax is that more better coding.
With several forms of mine, I occasionally run into the following issue: I edit the form using the designer (Visual Studio 2008, Windows Forms, .NET 2.0, VB.NET) to add components, only to find out later that some minor adjustments were made (e.g. the form's size is suddenly changed by a few pixels), and controls get deleted. This happens silently — event-handling methods automatically have their Handles suffix removed, too, so they never get called, and there's no compiler error. I only notice much later or not at all, because I'm working on a different area in the form.
As an example, I have a form with a SplitContainer containing an Infragistics UltraListView to the left, and an UltraTabControl to the right. I added a new tab, and controls within, and they worked fine. I later on found out that the list view's scrollbar was suddenly invisible, due to its size being off, and at least one control was removed from a different tab that I hadn't been working on.
Is this a known issue with the WinForms Designer, or with Infragistics? I use version control, of course, so I can compare the changes and merge the deleted code back in, but it's a tedious process that shouldn't be necessary. Are there ways to avoid this? Is there a good reason for this to occur?
One clue is that the control that was removed may have code (such as a Load event handler) that expects to be run in run time, not design time, and may be throwing an exception. Could this cause Visual Studio to remove the control?
If I build a Windows Forms project in Visual Studio 2008, and start it with a Sub Main instead of a form, and for the time being, don't show any forms, is it considered a Console application? Will console.writeline work?
I'm suddenly having trouble with GetPrivateProfileSection in a Windows Forms project in Visual Studio 2008. The same code works when it's run as an aspx page in a website. Anyway, I define the WINAPI call thusly:
I'm trying to build a setup program using the built-in Visual Studio Installer. I'm using VS 2010 and working on VB.NET.For the most basic kind of program, I have an EXE file which works on a XML file (the XML file is treated like a database). So on a Windows 7 platform with UAC enabled, the best deployment is to install the EXE file in the Program Files folder, and the XML file in the application data folder, for security purposes of Windows. (Windows, now, does not allow creating/writing files inside the Program Files folder unless your application is running with administrative privileges).
So I have added VS Installer to my current project and have opened its File System Editor. So to create the above layout, I've added Primary Output to the Application Folder. Then I've added its shortcut to the User Desktop.Now I need to place my XML file to the application data folder. VS Installer gives the option of User's Application Data Folder, which is the %appdata% folder in the environment table. I need to access the All Users' Application Data Folder.
1) How do I access the All Users' Application Data Folder over here?
2) I tried using the User's Application Data Folder. It doesn't work. It doesn't create any folder in the %appdata% (e.g. C:UsersFarazAppDataRoaming). I tried to play around with various properties, like AlwaysCreate which is supposed to create a folder obligatorily. It doesn't create anything.
i've been stuck on this for a while and searched many forums first with no solution so i'm posting myself. In VB for excel i've used Screenupdating= false to disable the screen updating however now i'm creating a visual studio 2010 windows forms application and its not showing up as a property. [code] And i get the error 'screenupdating is not a member of 'system.windows.forms.application'.
I have to compile projects which was compiled in Visual Studio 6 in Visual Studio 2005. When i compiled i got a set of same error. I opened the project for VS6 by selecting File->open->project/solution and tried to build a solution by Build option but i am getting the following error.
i am working on a project and i want your help for something. I use access database and visual studio vb.Net. In one of my forms i want to get records in a datagridview , between two dates . For example , i have the table Sales and i want to see all my sales between the two dates.
In my project i have different users lets say 100 users. My problem is most probably authentication. What i wanted to achieve is this;1. When user1 creates an account (saved database) with the following details
name: user1 lastname: user1
When he/she logging in into the system that information must be viewed by him ONLY. (authentication)
2. If user2 logging in he/she can't view the information of user1 (obviously).
I'm using SHDocVw.InternetExplorerClass to scrape a webpage. It works fine in XP, but when I try to run it in windows 7 I get an error:The interface is unknown. (Exception from HRESULT: 0x800706B5)
When I run visual studio in administrator mode it works fine, but the published application has to be run in administrator mode too, which isn't acceptable.
Is there any way to get around running the application in administrator mode?
