I want some event handling functions to only be able to be accessed via raised events and not called from the program.[code]...
Is there a declaration or some other way to accomplish this?
I am in vb.net and have a function that will be accessed by multiple threads. Everything inside the function uses local variables. However, each thread will pass in its own dataset by reference. From what I have read the local variables should be no problem, but I think the dataset coming in is a concern. How should I control access / execution of this function to make sure that it is thread safe?
View 1 RepliesI have a label inside an update panel which I wouldl ike to use as a status bar.Basically the user clicks a button which executes a main fucntion that performs a series of tasks. I'd like to inform the user as to the state of the function as it progresses e.g.:
Stage 1: Retrieving data...
Stage 2: Calculating values...
Stage 3: Printing values...
Stage 4: Done!
I've tried updating the updatepanel directly from the function but it only updates the panel at the end of function (stage 4) and shows "Done!" (which I understand is how it should work).I've been looking into timers and threads to try and update the panel separate to the main function?
I would like to match multiple network card MAC's with the corresponding IP Addresses to be displayed. Is there a better (or just another) way to enumerate them besides using System.Management or out-and-out WMI?
View 1 Replies[code]above loop does not update the text status of lable, while loop is running, it updates only at the end of for loop, but i tried with vb6.0 it is possible by using Do events.but i dont know what is the function in vb2010 beta 2.
View 5 RepliesIs there an official / unofficial list of bugs and issues in Visual Studio, or any of its components?
View 4 RepliesI downloaded vb 2008 Express edition and i was going to make a software... But when i try to link it with my Access Database (db.mdb) using ODBC i couldnt find ODBC under data sources.[code]...
View 5 RepliesHow to inset data into ms access database in vb 2008
View 2 RepliesHow to write to Excel worksheets without open Excel Application.[code]...
View 4 RepliesI wrote the below function to sleep, while processing the window events. It works well enough, but I'd like to improve the accuracy of the sleep. Example - If you call it with 10 msec (0.010), it can take up to 15 msec of real time before it exits. How to make it closer to 10 msec?
Public Sub Spin(ByVal TimeInSec As Double)
Dim tsStart As TimeSpan = Date.Now.TimeOfDay
Dim tsNext As TimeSpan = tsStart
Dim TimeSlept As Double = tsNext.TotalSeconds - tsStart.TotalSeconds
'wait for Time seconds
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I am very confuse over a Raise Events example and using delegate as a function pointer: I am clear with this function pointer example program below which creates a generic sort function for sorting integer arrays without changing the main sort function.
' Returns True if need to swap
Delegate Function CompareFunc(ByVal x As Integer, _
ByVal y As Integer) _
As Boolean
Here are two alternative target methods for the delegate - one for an ascending sort and one for a descending sort:
Function SortAscending(ByVal x As Integer, ByVal y As Integer) As Boolean
If y < x Then
SortAscending = True
End If
End Function
Function SortDescending(ByVal x As Integer, _
ByVal y As Integer) As Boolean
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I've done most of my testing under vb2008 debug. Now that I'm doing higher level testing with the executable I've found that I have to set the build output path every time I start the project - in fact, If I don't keep the project properties window open, I have to change the path back after every build.
I'm working with several projects whose executables interact, therefore I am constantly switching projects to tweek one of the other modules and I have to configure the build output path again every time.
Is there a way to tell it to remember the path "permanently" until I change it?
We have lots of security policies in place and many people (or process) have the privilege to access anyone's computer. Is it possible to tell who access and when and what folder was accessed? I know eventlog has lots of entries you can check, but in terms of what folder was accessed, is it possible?
View 1 RepliesI have been trying to implement the jQuery weekcalendar using .net. What I can't seem to figure out is why weekcalendar states events.events is undefined after I make an ajax call to a webmethod I created which returns JSON. Below is the relevant code:
[Code]...
I want to make Keybord events and mouse events for learning and educational Purpose.
1. In Form any object like A "picture box" move by Arrow keys .
2. Picture Box Contain many Picture i want change Picture With next and Previos By Arrow keys.
3. I contain Voice of alphabet in Mp3.When i Press any button in textbox then its work.
4. Mouse Pointer Change My Own.
5. I click any Object or any thing By mouse its noice clicking sound like Tik Tik Tik.... Question No 3 is very hard to do . but not im possible
I have 2 computers. Both with w7 as os. I have installed wampserver on one of them.I have mysql database on wampserver.Then I have made a vb.net program to connect to mysql database. I have put the program on both computers.What I want to do is for those two programs to see the same database that is on one computer. For them to be able to add, delete, update that 1 database. How do I do that? How do I network the mysql database? Do I also have to install wampserver on the other computer?What do I do
View 1 RepliesI'm getting an exception with the message "Deleted row information cannot be accessed through the row".
I already searched from similar questions but so far i wasn't able to find the solution for my problem.
The exception happens in the line
Code Block
Computer.FileSystem.FileExists(Environment.GetFolderPath(ProgramFiles) to get the Program Files directory in my application. The problem is that when running on a 64 bit version of Windows 7, I am getting the Program Files (x86) directory, not the 64 bit directory. As far as I can tell, everything is compiled as 64 bit.This code is actually in a DLL that is accessed during the installation of the program.
Is there any way to get the 64 bit path?
I want to get the last accessed directory path, what code should I use? The directory path I mean is just like when we use OpenFileDialog, default path of it is the last folder we accessed. I've tried to search but get no result.
View 4 RepliesI currently have an application that uses the FileSystemWatcher object and events to monitor activity in a selected folder. this works great for detecting files being copied to or created in the folder, moved or deleted and changed, however, I am trying to determine if a file is accessed (opened) regardless of if it is modified. One of the NotifyFiler options is LastAccess. It appears that this fires an event, however, it always seems to be the Modified event. I would like to be able to keep track of file access and modification separately. I currently store the activity in a listbox and also in a richtextbox where the text color illustrates the type of activity.Does anyone know how to accomplish determination of file Access versus file Modification?I have included some of my FilesystemWatcher code below.
Code:
Private Delegate Sub AddActivityTextDelegate(ByVal sActivityText As String, ByVal cColor As System.Drawing.Color)
[code]......
Suppose I have an IEnumerable such as a List(TValue) and I want to keep track of whether this list is being accessed (to prevent issues with, say, adding to the list while it is being iterated over on a different thread); I can always write code such as the following:
Dim List1 As New List(Of Integer)
Dim IteratingList1 As Boolean = False
' ... some code ... '
[Code]....
(I realize this code is very arbitrary, but it illustrates what I'm talking about.)
My question is whether there's a better/cleaner way to perform this check than by manually updating and accessing a Boolean, as above. I feel like there must be, but, to my knowledge, there isn't any IEnumerable class with a built-in "I am being iterated over" method or property. And writing a new class that implements IEnumerable and contains such a property seems like overkill to me.
How I can find program when accessed to folder... I know it show what file created, but I wish know WHICH program accessed to folder not what is created in folder !
View 14 RepliesI want to build my own class. In it, I need to recreate a behavior we can see in DataTable and in some other places : accessing items by their name or by their index. [code]...
View 5 RepliesI want to build my own class. In it, I need to recreate a behavior we can see in DataTable and in some other places : accessing items by their name or by their index. How can I reproduce such a behavior. Here's what I mean :
[Code]....
I am developing an application in VB.NET. in which I need to open the most recently accessed file (i.e. last accessed file in the previous session) when the application starts. One approach is to save the location of the most recently accessed file in a text file and read it when the application runs the next time.
View 2 RepliesI have two MS Reports with each their own dataset.The first one works but the other does not fill anything in it's table. When I debug the dataset, just before showing the Report, it's fill, and I did the same setup as with the first report.I get no errors og other input.. The table just not show any rows at all. Is their any log files that can tell me something and if so, where can I find them?
View 2 RepliesWe have a coding standard that says all shared (static) fields and methods must be called with the class name. E.g. NameOfClass.whatever Is there a tool that we can use to check this is in fact the case? (Likewise for modules) I should have make it clearer we are using VB.NET.
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I have some jpeg images that are added to my application. The Copy To Output Directory property is set to Copy Always. Running from Visual Studio the images are accessed and if I install the application to a drive on my computer directly the images are accessed but if I publish my application to my web site and install via the publish.htm page then the images are never accessed regardless of what I have the Build Action set to.
If the Build Action is set to Content then it won't even install because I get an error that says the computed hash for the images doesn't match the manifest. I've tried all the different Build Action options without success. For Build Action = None, Compile and Embedded Resource I don't get the error I do for Content but the jpeg images aren't accessed. [code]....
The VB.Net program in question creates several files, adds them into a zip file (using DotNetZip), and saves the zip file into a given directory (which the user chooses). This comes out just fine. But when I use it to save directly to my USB flash drive, I can't eject the drive without shutting down the program first.I've tried disposing the zip object (from the DotNetZip library), doesn't work. I also tried setting FileIO.FileSystem.CurrentDirectory to somewhere else on the machine, still no.
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