I have a bit of ported code. It was automatically converted from VB6 to VB.NET. Now when if finally compiles, it produces output files with some values replaced with literal #ERROR 448#.I will eventually find out what's the problem, but I just wonder, if anyone knows what does this error mean. VB's Write function is used.
View 2 RepliesAny thoughts on what might cause a thread error like this?Error:InvalidOperationException was unhandledCross-thread operation not valid: Control 'Form1' accessed from a thread other than the thread it was created on.
Relavent Code:
Private Sub SerialPort_DataReceived(ByVal sender As System.Object, ByVal e As System.IO.Ports.SerialDataReceivedEventArgs) Handles SerialPort1.DataReceived
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I've been pulling my hair out over some unexpected behavior from nullable integers.If I set an Integer to Nothing, it becomes Nothing as expected. If I set an Integer? to a String that is Nothing, it becomes 0! Of course I get this whether I explicitly cast the String to Integer? or not.[code] Previously I had my code up here so without the explicit conversion to Integer? and everyone seemed to be fixated on/confused by that. There were a lot of suggestions that Option Strict On would catch this type of thing. However, this is actually a quirk of the string-to-integer conversion rules which predate nullable types, but still impact them.
View 2 RepliesI've tried rewriting this code several times, it spits out the bytes correctly, but then when trying to read the array created from the memory stream, it's empty, what am I doing wrong?
Dim bytes() As Byte = System.Text.Encoding.ASCII.GetBytes("test this shit")
Dim bytesString As String = ""
Dim i As Integer = 0
i = 0
Dim byteStream As New System.IO.MemoryStream
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Im trying to figure out how to query a dataset when I select multiple values in a list box? I have the list box linked to the dataset and am using a button to search the values selected in the list box. I don't know what to do!
View 7 RepliesI have a project that reference from leadtools 16.5, and after that, i want to run my project..i see am error like it " An error occurred creating the form. See Exception.InnerException for details. The error is: Attempted to read or write protected memory. This is often an indication that other memory is corrupt. im using vb 2008 pro
View 6 RepliesA job recruiter asked me if I could take over writing code for a device that uses Windows CE. He didn't know much about it except that he thought the previous programmer was using Visual Basic, and he thought it might be Visual Basic.NET, along with SQL Server. I'd like to take over this programming job if I am qualified, but I don't know if I am. I have developed code using VB.NET, C#.NET, SQL Server for standard Windows. I used .NET to build programs that run on Windows desktop, and also the WPF platform. I also built ASP.NET and Silverlight programs for the web. In addition I have written programs that interface with machinery using serial and TCP coimmunications.
Would I be able to get up-to-speed on taking over the coding of a program that targets Windows CE? Does Windows CE allow .NET managed code or just C++ and VB6? Would it be advisable to try to get this job or would taking it lead to problems and disappointment?
I have developed an application in VS 2008 that generates crystal report.When I export the report to pdf,the application gets hang.The problem occurs since I can not create temp files in the temp folder i.e. %tmp%.The security level of windows 7 is high and it does not permits the application to create file.Can I alter the permissions in windows 7 using vb.net ?
View 10 RepliesTrying to develop a windows service which will write to a log file at prefix interval, but surprisingly the code "writelog" routine which previously work in a normal windows system but doesn't work under service.
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I understand that I cannot use the System.Console to output information from a Windows Forms application because the standard input, output, and error streams are not run through the console in winforms apps. But I can't seem to find any documentation on where the standard input, output, and error streams are being directed to! Basically, I have a winforms app that accepts command line arguments and can be run in batch mode, however, I just want to direct some feedback to the user based on whatever method they're accessing the program. The app is used to redirect a client-server application from one server to another. In some instances, the user does it by hand (with a mouse), and other times they're doing it in batch mode (using SAS, command shell, VBScript, etc...). In those instances, I'd prefer NOT to use MessageBoxes because it will kill any processing they're doing.
View 6 RepliesIn vb.net, What object can I use to read and write to windows registry?
(in vbscript, I use 'regread' in wscript.shell)
I'm trying to write a ClickOnce ap that will connect to a web database and download the data into a collection that will be written into a local database. This will allow the user to update the data while online but use the program while offline. I see it as a hybrid ap using both Windows forms and asp sql calls.
View 7 Replieswhen i tried to saving value to My.Settings its just work fine on windows xp. but when i ran on windows 7, VS2008 told me to change permission on My.Setting to writeable.
View 4 Repliesmy code is as below.
vb
Dim RegKey As RegistryKey = Registry.LocalMachine RegKey = RegKey.OpenSubKey("SOFTWAREMicrosoftWindowsCurrentVersionAuthenticationLogonUIBackground", True) RegKey.SetValue("OEMBackground", "00000000") RegKey.Close()
If I output the contents of it on a msgbox, things are fine, but when I go to regedit, the change doesn't happen where it should as it actually happens in another registry key located at
HKEY_LOCAL_MACHINESOFTWAREWow6432NodeMicrosoftWindowsCurrentVersionAuthenticationLogonUIBac
k ground which I guess happens since I am on windows 7 64 bit, but I don't want that to happen as doing that doesn't change anything. The key I'm trying to change makes changing the default logon screen possible in Win7, but it's not working like this since the wrong key is being modified.
I'm having a massive problem trying to write a file into the c:windowssystem32 directory. The code works fine on 32 bit machines, however does not work on 64 bit machines. My user account is an administrator on the machine, and even right clicking and choosing to run the app as administrator does not solve the issue.
When writing the file, no exception is thrown, but the file is not written. I have read various posts regarding adding an app.manifest file containing the requestedExecutionLevel node to my solution, but as yet am unable to get this to work. I have a feeling this may be because I'm using vb.net rather than c#.net(also, this is not a malicious app I am writing, I'm working on a version control app for our team and need to be able to interface with IIS files held in c:windowssystem32inetsrvconfig).
I are trying to write a small program for iTunes using Windows COM. We are able to talk to iTunes and create popup boxes that show the current track, and a few other small things. However, when we try to set this info to a Label for example, we get:
InvalidOperationException was unhandled by user code Cross-thread operation not valid: Control 'Label1' accessed from a thread other than the thread it was created on.
The program then hangs and locks iTunes from closing. I believe the issue is the event handler I have created, which I know very little about. We are using VB 2010, so that may change some things. We followed a rough example from a forum post HERE. If you scroll down the orange text, you will see a reply right after by Will Hughes with a "Handles iTunes.OnPlayEvent". If I add this to the end of my event handler, I get:
Handles clause requires a WithEvents variable defined in the containing type or one of its base types. Not sure if its important to the issue or not, but I found it curious. Our code is shown below.
Imports iTunesLib
Public Class Form1
Private iTunes As New iTunesApp
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What I need to do is write VB scripts that will work on any version of Windows, right back to 3.1. I may need to write several files for different Windows versions, I just don't know.
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This runs on Windows Server 2003 and XP. I've tested it on those systems. But will that run on Windows 7, Vista, 98, 95, NT, 3.1? If not, which language/version do I need to use to do the same job on each system, and could you point me to the language reference?
the next issue, that is only shown when the server is a Windows server 2008 machine , this is the information that I've found
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I'm trying to write a windows app that will download files from a server. It is working fine for small files, but not the larger ones (50Mb+)- I get the error "An operation on a socket could not be performed because the system lacked sufficient buffer space or because a queue was full."This is the code I am using:
Private Function DownloadFile(ByVal fileSource As String, _
ByVal fileDestination As String, _
ByVal WebRequestType As String) As Boolean
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I would like to know how to write a code for an application to make use of windows login and password to loginto application (single sign-on).
View 1 RepliesI need open excel sheets in an application write in VS2008 (VB.NET) and Windows 7 as OS. All seem work fine, but I don't see excel worksheet. I see Excel32 opened as process, but no window on my screen. The code I used id this:
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I'm currently trying to write a program in VB.NET which fluidly changes the DWM window colorization colors in Windows 7.I first tried to edit Registry values directly, but I had to restart the UXSMS service. This solution was unsatisfying, because of the toggle of the taskbar.
I'm now searching for a function in a DLL such as user32.dll or themecpl.dll which can reproduce the behaviour of control panel when setting the window color.I'm now on IDA, searching for the adquate function (CColorCplPage::SetDwmColorizationColor seems good!).
Who can write a windows service used as SMS gateway to push and pull sms to database..
View 3 RepliesRecently, I start scripting on Windows 2008 server.And find out some of my code, which is work on Windows 2003, is no longer work on Windows 2008.Below is vbscript that will wait until a particular processID to be terminated before proceed to the next line of code.[code]Could someone please advise what WMI method I can use to detect processID termination in windows 2008?
View 2 Replieswhy I am having attempted to write error first with my form generating an excel file. Then lately, with my other forms?
View 15 RepliesThe goal -- use VB.Net to write a windows forms application that responds to a limited set of voice commands after the user says a keyword, (such as "Wake Up"). I have the following code I am using from another site but I am getting an error I do not understand (nor do several others who posted comments at the same site.)
Imports System
Imports System.Data
Imports System.Deployment
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If I had any understanding of how to create a grammer file I MIGHT be able to avoid this error completely, since I am only interested in a few voice commands (maybe 30), not the whole 60,000 word dictionary.
I know this script [below] gives the pc motherboard number ,...well I would like to know how to write the result number as plain text somewhere in the windows, in a folder, or registry , or in a harddisk volume,... I know I could use
FileSystemObject CreateTextFile
I dont know how to insert it in the code , I tried but it gives me error
Code:
strServer = "."
Set objWMI = GetObject("winmgmts://" & strServer & "/rootcimv2")
Set objInstances = objWMI.InstancesOf("Win32_BaseBoard",48)[code].....
i have a method SaveRecord() in teh data access layer (DAL) that should return the status of the query execution to the Business Layer (BL)
There are three possible messages the DAL could return to BL: 1. Successfull Execution --> error NO: 12. Error: record already exist --> Error no:23. Error: SQL Errors while executing con.Open() or cmd.ExecuteNonQuery() --> Error No: 3
I'm planning to return error no to the business layer so that appropriate error message can be assignedd.
Is there any issue that my current technique might face becasue i'm not creating a seperate ErrorHandler class to assign those error numbers and error messages?
Should i create a seperate error handler class? If i need to create a error handler class should i create it in the DAL or BL?
I'm writing a .NET CF (VBNET 2008 3.5 SP1) application, which has one master form, and it dynamically loads specific UserControls based on menu click, in a sort of framework idea. There are certain methods and properties these controls all need to work within the app. Right now I am doing this as an Interface, but this is aggravating as all get up, because some of the methods are optional, and yet I MUST implement them by the nature of interfaces.
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I am trying to test a rest webservice but when I do a post and try to retreive the save the response stream to a file I get an exception saying "Stream was not readable." What am I doing wrong?
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