I have been following the development of the .NET Task Parallel Library (TPL) with great interest since Microsoft first announced it. There is no doubt in my mind that we will eventually take advantage of TPL. What I am questioning is whether it makes sense to start taking advantage of TPL when Visual Studio 2010 and .NET 4.0 are released, or whether it makes sense to wait a while longer. Why Start Now?
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I'm trying to familiarize myself with network programming, and what better place to start than designing an FTP client code library?So far I'm not doing very good. I'm trying to create a method which downloads a file from a remote server to a local file path. To do so, all the examples that I could find declare a byte array that serves as a data buffer. I completely understand the point of doing that, rather than reading and writing byte per byte, but I just can't get it to work. Whenever I set a buffer greater than 1 byte, the output is somehow corrupted (different checksums, media files won't play etc).[code]Because this code does work when I set the buffer size to 1, I feel like there's something going wrong with the byte order. But all of this code is synchronous, so how is that even possible.[code]
View 1 RepliesI have a list of strings that I need to pass to a process in a different class. What I want to know which of the two ideas would be a better approach to use in terms of speed,efficiency and parallel processing. The list contains +- 10000 strings and I want to limit the threads appropriately to have only about 5threads running at one time:
For i as integer = 0 to searchPages.Count - 1
Parallel.For(0,10,Sub(x)
ps.processPage(searchPages.Item(i))
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I have custom asynchronous WebRequest class that I am testing to find out how fast the request will be cancelled and found some odd results, that starting 6 WebRequests with TPL and cancelling them right away takes 25 sec, but when I used just regular background threads it took only 5 sec.
Update: Running them without cancelling takes with Task.Start 9 sec and Thread.Start 3 sec accordingly.
Imports System.Net
Imports System.Threading
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creating small task scheduler in vb.net using in built library of vb.net . " I checked out Codeproject's ScheduleTask.dll solution (vb)"But problem is i want to create using inbuilt library of vb.net not using solution in vb.
View 2 RepliesI just converted a project from 2008 to 2010. I didn't encounter any errors in the conversion.I tried to add HTML Imports System.Threading.Tasks. This gives the "...doesn't contain any public member..." warning and naturally, the .Tasks library is not recognized. Is there any trick to the conversion, setting in the properties, etc. that I need to deal with?Note that I have a "from scratch" project that accesses the System.Threading.Tasks class with no problem. Both projects are contained in the same Projects folder as in:
Projects/ProjectThatWorks
Projects/ProjectThatDoesn'tWork
I need code to disable start button in task bar. I need code to disable "windows key" in keyboard to lock start button Selection. I need code in vb.net?
View 2 RepliesI was wondering if it is possible to hide all desktop icons EXCEPT my application's shortcut ?
View 2 RepliesI have a service that scans network folders using a parallel.for method. However recently I am finding if I stop the service then while windows says the service is stopped the process is still running in task manager. However it is at 0 cpu and the memory does not change. If I try and end the task (even a force in command prompt) it just says access denied and i have to reboot the server. What would be the best way to make sure everything terminates? I thought of adding a global Boolean that in the stop procedure it turns true and part of my parallel code will check for that and call s.stop.
View 1 Repliesto disable right click and to disable the start button and task bar?
View 4 Repliesis it guaranted that a task A started before TaskB will be completed before task B assuming the task do the same level of operatons?or in other words is there a chance that a task B will finish before tast A in the assumption that the task calls the same procedure?
View 4 RepliesI have made my application to start automaticly when windows start (registry ../currentversion/run/appname + path). In this mode the application start minimized and an little icon appear in the notification icon area. With this icon you can maximize the app or exit it.If you exit the app and start it again using the Menu (Start/programs etc) than the application start in minimized mode (and in this case I would like to have it in normal mode) because the setting autostart is still true.Is there a way you can detect when the application start when windows startup using the above registry or when people click on an icon in the programs menu (or desktop)?
View 2 RepliesI have a Visual Basic Class Library project. It generates a DLL. Is there a method to generate a static .LIB to which I can do a static link?Alternatively, can I do a static link against a DLL?
View 6 RepliesI´m having a problem designing a recipes program with tag(url...) support/I dont know exactly hows the best way to build the tag system, the idea I had is this, Ill try to explain it though english its not my first language, sorry about that.[code]The idea is that since I cant save memory references, at the start of the program I rebuild the references of refRecipe iterating through stTag, searching for recipes which contains its tag name. Also, when creating a new recipe, I must search if the tags exist in stTag to just set refRecipe or create a new tag.I think this systems have a lot of disadvantages because of tag name duplicity. Though its fast to show tags and related recipes, its not when creating and editing recipe tags because of all the iterations, but its the better way I found to do it.
View 5 RepliesI have the following data in this a table
ID ParentID Active Node
1 0 1 <RCExtRequest>?</RCExtRequest>
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If changing the table layout would make this any easier then I could so that.
I need help in designing an aspx / vb page (.NET 1.1):The result is a table with 3 rows A,B and C it should look like this:
A
B
C
A, B and C have fixed height of 5 lines / 20 lines / 5 lines B content are gathered from dataset and can be more than 20 lines and then it should be splat and hole new table is created under the the first one like this:
A
B part 1
C
A
B part 2
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I have VB 2008 and SQL 2008. I need tutorials to teach me how to create and connect, update, delete alter etc a Front End VB app to a SQL2008 DB.
View 6 Repliesim a newbie to visual basic 2010 but i plan on learning everything in a 2 week period(i have a book on learning and im a very good at being self taught) i was just wondering if visuabasic 2010 would be a good language for building a mobile device from scratch and or developing for a mobile device(homebrew mobile device),
View 5 RepliesI am designing a program which enables us to write our language in any computer program My language is basically written completely opposit from english ( bilingual the program has to press the left arrow key everytime a letter/number/symbol is entered! i am having success with this code
For i = 32 To 32
result = 0
result = GetAsyncKeyState(i)
If result = -32767 Then
SendKeys.Send("{left}")
Timer1.Enabled = True
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I am working on designing a vacation tracking form for my job. I have written the code but I have two runtime errors. I am not quite sure why since I have taken examples out of my old visual Basic 2008 book to help write this code. I am using a database to keep all of the information on file.
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I have this code to log me into dreamincode.net:
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How can I adapt this code so the user can input the password, and the username and the site for which it is entered. so the user can do this with any numer of websites, and any number of different usernames/passwords)
I'm designing a form and trying to get different opacity values for different controls. How should i do it??eg. clear visible text floating over 50% opaque form.
View 6 RepliesI see that the old xsd editor has been removed from VS 2010 (the yellow one), however I am having some serious problems with using the new Xml Schema Designer that make me reevaluate my sanity. Namely I cannt find any command or any shortcut to create xs: nodes in xsd via designer.
I am an experienced architect and am well versed in writing xsd's "by hand" but I would like to use the designer to do it since. The weirdest thing is that even when I create schema elements by hand in xml editor it does not show up in designer but rather shows up only in Xml Schema explorer, which too does not have any "add" commands. Not to mention that all entries in properties are read-only, preventing any modification?!?
When I drag and drop a manually created element to designer surface I can then see it but still cannot modify it (plus I dont understand what moving it to designer surface does at all, the element should already be in the schema?). This is by far the weridest designer I've ever seen, unless I am missing something glaringly obvious which unlocks editing?
For every form I create, I do the following [code]...
What are my options for avoiding such repetitive actions?
Is there a "best-practice" for such a scenario?
Note: the reason I'm doing changes 1-3 is that the application's GUI is in Hebrew, and the application isn't required to support further localization or internationalization.
I am working on designing a SQL Server database connection class in VB.net 2005. The idea behind doing this will be so a developer can can call the class, pass it a stored procedure name along with the parameters, and get return values back (if any).
View 1 RepliesI work on a vb.net winforms app where we currently are using simple roles for security. We enable/disable specific controls based on if the current user has the required role. We are to the point where this is no longer granular enough.Our application is based on different physical locations we call sites. A user might have permission to do something (for example, edit a site's configuration) at one site but not another. Therefore, we now need to lookup permissions based on current user AND current site. Also, a certain user's permissions may be very specific to themselves ie. no other user's permissions are exactly the same as another user's. Therefore we need a security model that's more permissions based rather than role based.
What's the best way to design a new permissions model that can meet these requirements? I want to make sure that it's easy to implement the checking in the code (I don't want a million if statements sprinkled in our SetUIPermissions methods) and we don't want to have to update every user (400+ and counting) each time we add a new permission. Because of this last requirement I think we need to keep the idea of roles but possibly add/remove exceptions for particular permissions for specific users
I am designing and coding a program to calculate commission and pay and I have chosen to use menu items to do the calculations. I have written most of the code but I am seeing a few syntax errors that I do not understand.here is the code...
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how I would go about designing and making a parser for a basic-like language:
var my_string = "Hello World"
var my_number = 10
Print my_string
Print my_number + 10
Quite simple (although not very simple when it comes to programming it ). Does anyone have any ideas on where I can get started/how I would go about parsing it? I know it would involve a parser tree, but how would each node be structured?
I want to design an application that can open file of certain extensions. For ex. There is a software called ARJ32 which can open file with extensions
.a00 ,.a01...................,.a19.
Also there is application called apk emulator which can open .apk files. So eve I want to design an application that an open certain file extensions. Is it possible? How do I start? I am well versed with c, c++, Java, VB.NET
How can I drag controls within tabControls/Pages without losing handlers for buttons etc.?Cut and Paste looses all handlers?
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