I'm going to design an Application (C# or VB.NET) which use .NET Framework to run for very long time. It may be restarted every year or even more...Is there anything (using special design patterns or so) which I must care about in designing "Long time running applications in .NET"?
View 3 RepliesI have created a main application form that has buttons that start up various other applications.
Following advice on here from a previous post, I have imported all the files of each separate application into the main application.
There will be times when the user wants to run more than one of these applications at the same time. I know you can just import the '.EXE' file of each app, and you can then run several at a time. But because I have all the files without the .EXE, you can only run one at a time, you have to close one app to start another.
My question is simply; Do I have to import the .EXE file of each app, or is there some code I could put in my main form that will allow me to run more than one app at a time? (the reason for having all the files of each app is so you can make any alterations without having to open each app separately).
The code below is a typical code for one of the applications start buttons, all the buttons codes are the same, apart from the app name, the buttons are imported, so not standard buttons.
Private Sub btnCoordsCalc_ClickButtonArea(ByVal Sender As System.Object, ByVal e As System.Windows.Forms.MouseEventArgs) Handles btnCoordsCalc.ClickButtonArea
Dim frm As New frmHoleCoordinateCalculator
[Code]......
Is there a way to, when a parent application is opened up, that at the click of a button, or anything of designated event, that this parent application can open a secondary one?
View 11 RepliesI have a web request that can take 30-90 seconds to complete in some cases(most of the time it completed in 2-3). Currently, the software looks like it has hung if the request takes this long. I was thinking that I could use background worker to process the webrequest in a separate thread. However, The software must wait on the request to process before continuing. I know how to setup the background worker. What I am unsure about is how to handle waiting on the request to process.Do I need to create a timer to check for the results until the request times out or is processed?
View 1 RepliesI have a service ticket management application and users want to open several ticket details on a tab in a MDI frame. Since this application has to communicate through Web XML service with other company, it takes around 15 ~20 seconds. The users most complain is that he needs to wait until a saving process is done. Cursor is working while data is being saved and other can't be done
View 3 RepliesI am developing a solution in .Net utilising the VMWare Web Service API to create new isolated virtualised development environments. The front end will be web based. Requestors input details for the specific environment which will be persisted to SQL. So I need to write an engine of some sort to pull the data from SQL and work on the long running task of creating resource pools, switch port groups and cloning existing VM templates etc. As work progresses, events will be raised to write logs and update info back to SQL. This allows requestors to pull data back into a webpage to see how it's progressing or if it's completed.
The thing I am struggling with is how to engineer the engine which will exec the long running task of creating the environment. I cannot write a windows service (which I would like) as we work in a very secure environment and it's not possible (group policy etc). I could write a web service to execute the tasks, extending the httpRuntime executionTimeout to allow the task to complete. But I'm keen to hear what you guys think may be a better solution to use (based on .Net 3.5). The solution needs to be service oriented as we may be using it on other projects within our org. What about WWF, WCF? I have not used any of the newer technologies available since .Net 2.0 as we've only just been approved to move up from .Net 2.0.
I have written a program that searches a bunch of urls and pulls out information that I need. The program works to an extent. Everything codewise works, but it seems like I did a sloppy job of pulling the code together. After about 10 minutes of running, the program just becomes unresponsive and I have to close it through task manager. I've seen it range from 100k to 350k in memory useage. It also uses about 80%+ cpu usage at all times. I hope someone might be able to see something that I forgot or did wrong as the program is meant to run almost full time, executing parts of code on certain days/times.
Dim con As New SqlClient.SqlConnection
Dim strCon As String = "Data Source=server;Initial Catalog=database;Integrated Security=True"
con.ConnectionString = strCon
[code]....
How can I get all of the running applications? If I have to use Process.GetProcesses, then how can I determine which are applications (appear in the task bar)?
View 4 Repliesfor example:
dim a as long
for i as integer = 1 to 10000000
[CODE]..........
It will hang when it run til half way.
I'm currently trying to write a football simulator but am having issues with the computer becoming unresponsive. There are long lines of code (several thousand lines) that are executed over and over as one run of the code is equivalent to one second of game time. While the game is setup to be like Football Manager where you watch the game live, there will also be cases where the entire game is simulated without you watching. When doing a full sim of a game, I just have a loop which executes the code block 7200 times (games go for two hour roughly).
At the moment this takes about a minute but even when I get it down to the desired 5-10 seconds or so, I dislike the fact that the computer becomes completely unresponsive during this time. In a round there are 9 games and you'll be simulating without watching 8 of them. You're looking at 1-2 minutes of simulation time or possibly more. I can't have a loading screen that long! How can I program the game so it runs these simulations yet the game still remains responsive? It'd be fine if the user could muck around in the menus and stuff while the simulation runs.
i am having trouble executing applications that havent got the prefix .exe here is the code tat i mostly found in the internet can someone help so it will be able to play with all applications tried to make it play with msi but it wont play.
[code]...
I am running a test program for VB.NET, and it will simply crunch a million numbers in for loop. I've linked a variable implying the progress of the for loop with the progress bar, but it seems that when I run the program, the progress bar does not update itself. The bar itself has only value 0-100 as input (as stated in the document) and I've tested it without using the for loop, and it works.
View 2 RepliesThis code executes "handbrakecli" (a command line application) and places the output into a string:
Dim p As Process = New Process
p.StartInfo.FileName = "handbrakecli"
p.StartInfo.Arguments = "-i [source] -o [destination]"
[code].....
Anybody have an idea to list running programs ; not all running background process. I tried following code, but which list all process names. eg: notepad.exe, vb6.exe, svhost.exe etc. but what i need is the running window based programs( with windows.)
1st method
Dim process As Object
For Each process In GetObject("winmgmts:").execquery("Select * from Win32_Process")
Debug.Print process.Caption
[code]....
I developed an application I need to run exclusivly under DOS mode (no Windows), when I wrote the app I created it as a CONSOLE application, when I run this EXE under the DOS mode it says it can't RUN in DOS mode? Is there ANYWAY I can make this work?
View 5 RepliesI have seen that unsigned .net applications will not run on most college networks and as part of a school applications i am trying to let these applications run on a protected network. The app is written in VB 2008 and is signed strongly.
View 1 RepliesI have created an application that will run several other Engineering applications from within it.
I have my main form which will have a button on it for each application that has to be run. All the other projects are complete and have their respective '.EXE' files, which I have added to the main project.
I have coded one of the buttons to start an application, this is as follows;
Private Sub btnCoordsCalc_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnCoordsCalc.Click
Process.Start(My.Computer.FileSystem.CurrentDirectory & "Hole_Coordinates_Calculator.exe")
End Sub
This method works OK and does start the application. So my question is; Is this the correct way to do it, or should I import the whole project into my main project?
i am a casual user of visual basic express 2008 and use Vista Home Edition Ive been using it for a while now, with no problems at all. Recently i started to take a look a WPF in my apps, again no problems.(visual basic express ran fine, debugging ran fine & finished apps ran fine)
However for some reason (and all of a sudden) i keep getting errors and none of my apps will start up.
The errors are:vshost.exe has stopped working (I get this when visual basic express starts)PresentationFontCache.exe has stopped working (I get this when visual basic express starts a wpf app)
(Application Name) has stopped working (I get this when running finnished apps)I've tried all the usual methods (Reninstalled VBE & .Net3.5)I cant see why it has stopped working all of a sudden?
he lack of VB terminology in the following question - this is all fairly new to me. Anyway, on to my question.I have 2 seperate applications running and they both need to access the same array. Is it possible? If so, how?
View 2 RepliesI'd like to ask assistance for the following scenarios below:
1. I want to check whether certain applications are already running or not.
2. The applications i need to check are the ff:
a. MS Word
b. MS Excel
c. Notepad
d. MS Project
e. MS Powerpoint
3. If any of these are running, the window title of that application will be filled-in in a listbox.
I have created a simple windows forms application. I would like to be able to connect to that running application and view certain properties from a seperate windows form application. In VB6 I would have run the first application and then called GetObject to connect to the instance. Does anybody know how I could do this in .Net. I'm guessing I'd have to use reflection to get a list of applications running and then somehow connect to them but I'm not sure how to do this?
View 5 RepliesI am running a client-server application and am having problems with privileges (I assume). The application is developed using 2005 Express. The Client is running Win XP Home whilst the server is running Win 2003. When the user on the client has Admin rights on the local machine, everything is OK; however when the user has only User rights, an error occurs: VB will not run.
View 14 RepliesI want to get the detail of all the applications running in windows like
Application name : Status : User : Resources Usage : etc....
also I want to get the detail of all the users logged in at a time
I am wondering if it is possible to run an application from a domain account that has restrictions on running .exe files by coding in the local administrator details (username / password).
View 3 Repliesi would like to scan all the processes(aplications) running in a system before starting my program. and also need to close some programs before starting my program.how to read all the processes ruining in a system one by one.
View 1 RepliesI've been using things like FileOpen, and FilePut for a long time in VB.NET, and it's never presented any problems. However in my latest project I'm using CodeDom to compile at runtime, as you know FileOpen, and things like that are the old VB6 methods, such as MsgBox("Msg"), and these don't work. So I need to know how to do this using only the newer VB.NET code.
[Code]...
I'm looking for the equivalent to a Java System.currentTimeMilli(), in VB.NET.What is the method to call? I know about Datetime.Now, but not about the actual conversion to long milliseconds.More details about my specific need: I need to manage a login expiration. So most likely when I log in, I will set a "expiration_time_milli", equal to the current time + the timeout value. Then later, if I want to check if my login is valid, I will check is "expiration_time_milli" is still superior to current time.
View 4 RepliesI wrote a program which loops through a very long CSV file (50 meg) and parses the data as it goes.Sometimes, the program aborts and I get the following message:The CLR has been unable to transition from COM context 0x37a090 to COM context 0x37a200 for 60 seconds. The thread that owns the destination context/apartment is most likely either doing a non pumping wait or processing a very long running operation without pumping Windows messages. This situation generally has a negative performance impact and may even lead to the application becoming non responsive or memory usage accumulating continually over time. To avoid this problem, all single threaded apartment (STA) threads should use pumping wait primitives (such as CoWaitForMultipleHandles) and routinely pump messages during long running operations.
I know its going to take a while. There are several hundred thousand lines of text in the file that this program is reading. I am not sure exacly waht the message means, but my program seems to work fine other than the message. odd thing is sometimes the message doesnt always pop up..
I've a solution with 15 projects (14 class libraries and one web application). Each class library has corresponding test project (i.e. if I have MyApp.Services project there exists MyApp.Services.Tests -- using NUnit). Everything is written in VB.NET. The problem is that when VS tries to compile any of *.Tests project it stops responding (the bigger the project the longer the period without reposnse). I don't know where to start looking for an issue. I'll add that I've R# 4.5 installed.
UPDATE 1:Is there any way to benchmark a build in visual studio? To get build times for every project?
UPDATE 2:It seems that there is no difference after disabling R#.
Occasionally, my website will stop functioning and anytime an ASP page is accessed, the browser will hang for many minutes before bringing up a correctly formatted HTML page with nothing in the tag. It seems to happen whenever more than one person attempts to access an ASP page, but I'm not positive it's isolated to those conditions.
Let me emphasize that the issue does not arise when accessing directories/HTML pages/other files. Only ASP pages are the problem. I am using lunarpages as a host.