|
Why not just set the progressBar to Style property to Marquee? That would save all that coding for the same effect.
Steve Jowett
-------------------------
Real programmers don't comment their code. If it was hard to write, it should be hard to read.
|
|
|
|
|
Didn't know that style existed. I tested it out and yes it basically does the same thing. I'll use that style next time I want a progressbar for just the visual effect. Like TechBearSeattle said, I'm not sure if Daniel Engelkes wanted a visual type of effect or was looking for a progress bar to actually show progress of a certain process.
Thanks! 
Lost in the vast sea of .NET
|
|
|
|
|
What, precisely, is the bar measuring the progress of? That is going to have an impact as to how you code your solution. If it is just a timer -- the splash screen will be visible for 10 second and then go away -- you can use a timer.
If you are actually displaying the progress of your application's start-up, though, you will need to do some planning. Set your bar to have a minimum of 0 and a maximum of 100. Then look at everything that the set-up does: read the registry and set variables, locate network resources, manually load libraries, verify user credentials, and so on. Assign each individual step a percentage of your maximum, and reset the bar's value after each step. You might also want to add a status bar at the bottom of the splash to give text feedback.
Private Sub UpdateProgress(ByVal Text As String, ByVal Increment As Integer)
ToolStripStatusLabel1.Text = Text
ToolStripProgressBar1.Value += Increment
StatusStrip1.Invalidate()
End Sub
Public Sub Main()
ToolStripProgressBar1.Minimum = 0
ToolStripProgressBar1.Maximum = 100
ToolStripProgressBar1.Value = 0
UpdateProgress("Verifying user credentials...", 20)
{code}
UpdateProgress("Locating network resources Alpha...", 10)
{code}
UpdateProgress("Locating network resources Beta...", 10)
{code}
UpdateProgress("Locating network resources Gamma...", 10)
{code}
UpdateProgress("Verifying current version...", 25)
{code}
UpdateProgress("Loading MyLib1.dll...", 5)
{code}
UpdateProgress("Loading MyLib2.dll...", 5)
{code}
UpdateProgress("Loading MyLib3.dll...", 5)
{code}
UpdateProgress("Finalizing...", 10)
{code}
Me.Close()
End Sub
When the splash screen closes, the app's main form will launch.
|
|
|
|
|
In my program I create a file using:
dim strFileName as string = "c:\test.txt"
File.Create(My.Settings.strFileName)
I'm just using the file as a basic reference that the program is running and while this file exists don't try and start another instance of the program. I don't use the file or add to it or anything.
Later I try to delete the file using:
File.Delete(My.Settings.strFileName)
I've also tried Kill(My.Settings.strFileName)
Unfortunately I get this error:
The process cannot access the file 'c:\test.txt' because it is being used by another process.
I understand the error, but how do I get the program to let go after I create it so I can delete it later?
Lost in the vast sea of .NET
|
|
|
|
|
You can accomplish the same goal by going to the Project settings, view the Application Tab, and make sure the checkbox that says Make single instance application is checked. Now only one instance of your application can run at a time. Also, if you want to, you can View the Application Events and add and event called the MyApplication_StartupNextInstance. You can add code here to perform a specific task if a user tries to run the application more than once.
Hope this helps.
|
|
|
|
|
My app is being called by a service and isn't really Form based at all. I currently don't have the application framework enabled. This suggestion was great... I didn't know this feature existed, but I'll try it another day on a different app which is more based around forms. Thanks!! 
Lost in the vast sea of .NET
|
|
|
|
|
File.Create does not just create a file, it also opens it and returns a reference to the created FileStream.
Try this:
Dim MyFile As FileStream = File.Create(My.Settings.strFileName)
You can then use MyFile to add text. When you are done, call
MyFile.Close
File.Delete(My.Settings.strFileName)
|
|
|
|
|
Thanks!!! That worked perfectly!
Lost in the vast sea of .NET
|
|
|
|
|
If you're using a file to prevent a second instance from being opened, you have a problem. This won't work in all cases since you can have two instances of your app both checking for the existance of the file and both trying to create the file at the same time.
A better solution is to create a Mutex instead. A file can be created by multiple processes at the same time. A Mutex cannot. If two processes try to create the same mutex as the same time, one of them is forced to wait until the other request completes.
Documention on the Mutex class can be found here[^]. Just be sure to read it and to release the Mutex when your app is done with it.
|
|
|
|
|
Thanks! That does sound like a better solution! I'll look into it.
Lost in the vast sea of .NET
|
|
|
|
|
Hi all.
I wrote a directory watcher to monitor a folder for any changes. It works fine when monitoring a local folder and also a folder on the network as long as it's on a windows server.
As soon as want to monitor a samba share(Linux server) it doesn't work.
I am using the "filesystemwatcher" and from what I've heard it only works on a NTFS file system.
Is there a work around for this?
Thanx in advance.
|
|
|
|
|
There is a something you can try, but it doesn't work as good as the normal options the FSW uses:
Dim watcher As new FileSystemWatcher(folder, True)
watcher.setStrategy(Win9xWatcherStrategy.class)
|
|
|
|
|
Thanx for the fast reply.
I take it I need to use "Import System.IO"? And instead of "folder" use the directory?
It complains about "setStrategy" and "Win9xWatcherStrategy"
Do I need to declare it?
|
|
|
|
|
Whoops. My bad - that's only good in Java, not the .NET Framework.
There is no equivilent for the .NET FileSystemWatcher.
There is no known workaround to get the FSW to work with a Samba server properly. The FSW only works properly with NTFS partitions.
|
|
|
|
|
Well thanx for your help.
Isn't there something I can use instead of FSW?
|
|
|
|
|
There is no other component that does anything close to what the FSW does.
I don't know of any 3rd party copmonents that do it either.
When faced with such a situation, I woud just "roll my own" component. you'd have to poll the folder you want to monitor every so often, getting all the filenames and their modified dates. Then, on the next pass, fire off events for any files that have been added or changed since the last pass. Repeat ad nauseum.
|
|
|
|
|
Not tried it myself, but as a work-around, you could (ff you have access to the Linux machine) use inotify to detect file changes and send them to your application over your network.
Steve Jowett
-------------------------
Real programmers don't comment their code. If it was hard to write, it should be hard to read.
|
|
|
|
|
I have a shared variable of sub report in main report. I want to sum it.
|
|
|
|
|
You should store the values in database then use function for Sum of Field.
If you can think then I Can.
|
|
|
|
|
Hello Every Body,
I have a listbox in which have 20 items. But when i want to get number of items in Timer. But it displayed 0.
If you can think then I Can.
modified on Tuesday, April 6, 2010 3:49 AM
|
|
|
|
|
Are you going to finish your sentance and ask a question?
Steve Jowett
-------------------------
Real programmers don't comment their code. If it was hard to write, it should be hard to read.
|
|
|
|
|
Yes Please check
If you can think then I Can.
|
|
|
|
|
eg_Anubhava wrote: Yes Please check
I did, and select isn't broken.
eg_Anubhava wrote: I have a listbox in which have 20 items. But when i want to get number of items in Timer. But it displayed 0.
Try explaining something more. Did you create the items before you started the timer? Does the list "display" 0 items or does it "contain" 0 items?
Can you post your code here?
I are Troll 
|
|
|
|
|
Hello Everybody,
Can any one explain it what is Flickers in vb.net. My friend suggest it Flickers is new concept of vb.net.
If you can think then I Can.
|
|
|
|
|
eg_Anubhava wrote: Can any one explain it what is Flickers in vb.net. My friend suggest it Flickers is new concept of vb.net.
No, it's not. Never heard of it. Ask your friend to explain what he means.
Google results for "vb.net flickers[^]".
|
|
|
|
General 
News 
Suggestion 
Question 
Bug 
Answer 
Joke 
Praise 
Rant 
Admin 
Submit an article or tip
