Passing Variables From Child Process To Parent Process
Feb 13, 2012
I have a procedure (parent process) that starts several processes (child processes). The child processes calculate several array variables. How can I pass those arrays to the parent process? At the moment, the child processes write the arrays to a streambuilder and the parent process reads the stream. Is there a better way to do it? Is it possible to have the child processes write to RAM memory and have the parent process read from there? It is like declaring a global variable in the parent process and give the child processes access to it.
I'm having a hard to figure out how to get the other process base on the parent process. I mean in task manager i have only one process name I'm gonna call it YeheyTask. But in application there are different application that under the YeheyTask how to get all the subprocesses of that parent process ?
My VB.NET Windows form application includes a BackgroundWorker that calls a command-line batch file in a Systems.Diagnostics.Process object, which in turn calls a Java command. If the user cancels, the program kills the cmd.exe properly via process.kill() (it is ok in this case), but the java.exe child process remains, which makes the program hang. I've researched how to kill a parent and child process. It seems there are complicated ways to do this via WMI or Win32 API. But I'm hoping there is a simpler VB.NET way.
I have written a windows service that is meant to launch a notepad when a specific action happens. The problem i have is that even though the service launches notepad, the actual notepad it self is NOT visible. I know that it has been launced because i can see the process in the task manager. By the way the process is listed as a SYSTEM process rather than a process under my user name (i believe that is because my process is a "LocalSystem" one).
I have a simple contact book. The application has a main window that's an mdi form. When a contact is added using the "add a contact" form, I want to show a simple feedback message in the parent window status bar saying that the contact was added successfully. Here's the child loading:
In my WPF Form1 I have TextBlock1 that fill from AddressTableAdapter. To edit address user must click EditButton to open Form2 to perform changes. My problem is passing data to Form2 from Form1. In Form2 I have 3 TextBoxes Street, City, Zip, and StateComboBox. I try to code in Loaded procedure of Form2 like this and got error message:
Private Sub Form2Detail_Loaded(ByVal sender As Object, ByVal e As System.Windows.RoutedEventArgs) Handles Me.Loaded Me.AddressTableAdapter.Fill(Me.AbcDataSet.Address) Me.StreetTextBox = IIf(IsDBNull(AbcDataSet.Address.StreetColumn), "", AbcDataSet.Address.StreetColumn)) Me.StateComboBox = IIf(IsDBNull(AbcDataSet.Address.StateColumn), 0, AbcDataSet.Address.StateColumn)) End Sub
I'm writing a program to control another program using redirected input and output. This is a simple sample of what i want to do that works. But since I'll then be adding other commands and waiting for other responses like username: then password: then. I'd like to put the "wait for" and "send" sections in sub routines. My problem is somehow I'd have to pass a reference to the process or at least sIn, sOut and sLog to those routines and I don't know how. Do I dim the process as global or???
I am working on a .NET console app which needs to clean up resources on exit. The problem I'm running into is that I don't get any notification if the cmd parent is closed via the console window [X], via Task Manager/Process Explorer or programmatically with WM_CLOSE. I can live with not being able to handle Kill Process from Task Mgr. or ProcExp. WM_CLOSE of the parent console is the most likely way that this application will be closed before it's finished processing.
Here are the events I've tried to register for so far: AppDomain.CurrentDomain.ProcessExit += CurrentDomainProcessExit; AppDomain.CurrentDomain.UnhandledException += CurrentDomainUnhandledException; Console.CancelKeyPress += ConsoleCancelKeyPress; Application.ApplicationExit += ApplicationApplicationExit; [Code] .....
These events fire properly when I send a CTRL+C from the console or the application finishes uninterrupted. But none of them fire when the parent app (cmd console) is closed. (The parent/grandparent processes aren't CLR so I'm not sure I would ever receive those Disposed/Exited events. Those are just shots in the dark.) I've looked at some pInvoke stuff but I would rather not go down that road if .NET is an option. Is there a way to detect and handle a shutdown in these situations? I am open to any .NET, pInvoke/Win32/C/C++ solution. (Basically any way it can be done on the Windows platform.). I'm still working with .NET 2.0 so I can't use anything introduced in .NET 3.0+
I've been looking into a way to obtain Parent Processes and then list them in a TreeView so I can list the child processes as child nodes However, it doesn't look like the framework has any built in methods. I thought I heard something about MS putting it in the .NET Framework 4.0. But, that's irrelevant at the moment.
Since there are no specific methods, is there still some way I can manually retrieve this info? Or would have have to use some unmanaged code? Maybe an API?
I haven't programmed in Visual Basic before. I downloaded the 2008 Visual Basic and I'm trying to write something that activates the frontmost window of the parent process. I realize that there's a few steps... find the parent process, get its first window (z-axis wise), then raise that window even though it currently isn't the active program.
I've found some example code on the net, but none of it compiles, even code I found at Microsoft. I'm guessing that it's all an older syntax that's no longer supported. [code]...
I have a listview with process that are running. my goal is to pass the "path" of the process to a text box when someone clicks on a selection.but my code isnt working correctly, this is what I have:
Private Sub lvwProcBox_SelectedIndexChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles lvwProcBox.SelectedIndexChanged Dim pID As Integer = Int32.Parse(lvwProcBox.SelectedItems(0).SubItems(1).ToString) Dim proc As System.Diagnostics.Process = Process.GetProcessById(pID)
[code]....
and of course the text boxes path changes to a different path if a different selection is made?
I am trying to pass arguments to my wintv.exe program using the process.start command but I am getting errors...Here is one example that starts Wintv but the program does not begin to record and Wintv throws up a bunch of errors and quits.
I'm running some command line programs through my app and I have to pass some parameters to the command line app.I'm launching the command line with Start.Process and using StartInfo.Arguments = "".The problem is that some of the parameters require me to pass quotes and when I put quotes into the compiler, it doesn't register it in the way I want it to.
In a program I've been working on I would like to start a process and save it in a variable of type Process. This is so I can kill it later, if needed, and change the window type.
We have an application that self-updates using a Laucher.exe process which copies down new App.exe and DLLs from a server then runs them in a separate process. This was all working very well until the arrival of the Windows 7 taskbar... Problem is in Windows 7, if the user pins the Launcher.exe to the task bar (by right-clicking the shortcut to Launcher.exe) then this happens... When you start the program the "pinned" taskbar icon momentarily gets focus while the launcher is running but then a totally separate new icon appears when App.exe is running. If the user then decides to right click the icon from the running App.exe and pin that to the taskbar, they bypass the application update part of the process.
I have a (in my eyes) complicated issue. I need to process a Word document and print it with an ASP.NET application. There will be certain variables in the document. We would like to indicate these between brackets, i.e. {name}.
Is it possible to fill up these variables before printing? In what direction should I look?
I have a Public Sub I am using to enumerate running processes and then display them in a ListView.I want to be able to update the list automatically each second. I've thought of doing this in two different ways, but the method that I want to use is checking if the process has exited or not.
When reading up on the Process Properties, I ran into .HasExited and .Refresh.I thought that I could use a timer and have it tick at 1 second intervals. I would then check, each second, if the Process has exited. If it has, remove it from the list.The problem with this, is that I don't want to put the sub in the timer because it would just constantly flicker the control. I need to figure out a way to access the variables inside of the Sub while inside of the Timer's .Tick event.The other issue is being able to add processes that aren't there. Which I can within another sub. I was thinking I could create a sub that grabbed the Processes by ID, compare them to the list, and them add them if they aren't there. If I did this, I could also remove Processes by ID that aren't in the list.
I have MDI Parent Form and i'm going load all form as MDI child. Here i'm going to give option to "Close All" toolstripbutton in top of MDI Parent to close All mdi child forms.
Now i would like to check that On click of Close All Toolstripbutton , i have to close all mdi child form but except those form is on process, example, I have opened/Loaded 5 MDI child forms within MDI Parent Form.
Child forms are ( just for example ) ,
1. Customer details Form
2. Item Details Form
3. Import Orders Form
4. Stock Details Form
5. Production Entry Form
Here 3.Import Orders form is importing from Excel with 5000 records and 4. Stock details form exporting to excel.
So now if i click "Close All" button then i have close only Idle form i.e 1,2 and 5 but i should not close 3 and 4 since its on some process.
So Is there any .NET option to check that form in process/idle or do I have to check manually by having any Flags ?
I want my vb.net dll to get the data sent from c++ project(exe).Can any body help on in what form this void pointer can be sent via pipe. The void pointer corresponds to enums or structures. I have to get this structures/enums on the vb.net dll end. I have mentioned about using pipe. My question is as what type the pointed to data can be send over the pipe so that I can easily handle the received data at the vb.net dll end.
i am trying to write a little program that checks for a process and kills is.here is the
Dim p As Process = Process.GetProcessesByName("Cheat Engine")(0) p.CloseMainWindow()[code]...
My problem is it�s woking ,yes if the programm ,,Cheat Engine" is running the process is getting killed.But if the program is not running my program crashes.
I'm executing a remote process using WMI and would like to redirect the StandardOutput of that process back to my program. I have found these code examples:
The process cannot access the file 'C:UsersdavidDesktopTest Folderdavid 2.xml' because it is being used by another process.
how do i end the prosess after I create the file? Or am I creating it in the wrong manner.The underlined line is where the error ocures.
Public Sub AddDTData(ByVal value1 As String, ByVal value2 As String, ByVal filename As String) dtUser.Rows.Add(value1, value2, Now.Date) If My.Computer.FileSystem.FileExists(filename) Then
How to get full path of current directory of process from where process starts Like if i use my software to start somefile then I want my software to know where she started it from ( files path) What I mean is the file I opend using my softwares location.
My app starts an On-Screen Keyboard process like this:
Dim PID as System.Diagnostics.Process : PID = Process.Start("C:WindowsSystem32osk.exe") :
[CODE]...
It seems to work 90% of the time. However, sometimes the PID.Kill() fails because it says the process already exited. At this point the OSK is always still there on screen. Yes, I know my code should be testing to see if the process is still running before trying to kill it, but given that the OSK is still on screen..
I have a program that starts another program after setting the regkeys basically the program continually syncs the calandar of outlook and another application.I set the regkeys than launch the c:sync.exe app. I have tried a simple process.start and launching the process as a thread and they both do the same thing: The other process starts and works as it should but my main program goes "White screen" or "not responding" until the process.start has exited.
I want the process.start to run in the background so if users click in my main app it responds and truly that they can access the context menu of my main app from the taskbar while the process.start is running.
