C# - Cannot Pass Arguments In Dispatcher.invoke?
Mar 16, 2012
I will need to convert the following VB Form code to WPF C#:
// VB Me.Invoke(New FooDelegate(AddressOf Foo), New Object() {cmd})
Where Foo is just a method taking a string argument cmd.
I tried all the following in WPF C#, but all giving me exception:
//C#
dispatcher.Invoke(new FooDelegate(Foo()), cmd);
dispatcher.Invoke(new FooDelegate(Foo(cmd)), cmd);
dispatcher.Invoke(new FooDelegate(Foo()), new object() {cmd});
What is the correct formatting?
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Mar 12, 2012
Simple question: How does this translate to VB.Net
Dispatcher.BeginInvoke(() => listening = false);
listening is a variable on the class (boolean). Converters online didn't nd what we've come up didn't compile:
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Aug 22, 2010
In a threaded app in VB 2010, I can do this[code]...
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Apr 3, 2009
Using VB.NET, is there a way to pass a reference argument when invoking a function in a dll.
Suppose I want to pass arg2 as a reference argument, how would I do that?
method.Invoke(obj, New [Object]() {arg1, arg2, arg3})
In other words I want to point arg2 to something else within the invoked function.
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Feb 14, 2011
I am using VS2010 (VB) and I am trying to dynamically call a function in another assembly. From my research, I seem to be doing it correctly --- but appearenty not since I get a run time error. {apologies if the code does not come out formated -- the code block helper is not loading for me}Here is the proto type of the function I am calling.
Public Class PrintLabel
Public Function ProcessMany(ByVal listRequests As List(Of Request)) As Windows.Forms.DialogResult
End Function
[code]....
When I step through in debug mode all seems great until I hit the .Invoke() line. It is then I get a paremeter count error exception.
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Feb 2, 2011
im trying to make a little app that you can run from a web address bar... some games we play has that function in the game but some dont... so i found some source code online on how to insert data into registry and i can launch the game from a web browser address bar... BUT i need to pass another argument path to game\game.exe -mod:"modname here" -server:"server ip here":"server port here" -noautoplay now i can get it to load with path to game\game.exe -server:%Host%:%Port% -noautoplay some code from the app....
Dim u As New Uri(args(0))
Dim arguments As String = reg.GetValue("HeatLinkArguments").ToString()
arguments = arguments.Replace("%Authority%", u.Authority)
[code]....
but how can i add a string in of my own??? i want to have something like this....
path to game\game.exe -mod:%ModName% -server:%Host%:%Port% -noautoplay
arguments = arguments.Replace("%ModName%", "name of mod")
how would i insert "name of mod" in to the replace?
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Feb 7, 2011
Imports SpeechLib
Public Class Form1
Public vox = CreateObject("sapi.spvoice")
[Code].....
How can I pass text2 to vox.speak?
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Jun 16, 2009
I have an application which sits on general users machines. What I want to be able to do is for the users to create a new directory through the application that will create a directory on a server that they do not have access to for secutiry reasons. Then the users can create a file within the new folder through the application, again which they do not have access to. The whole idea is to have an application that manages files that are able to be accessed by many users through the application / backend database, and therefore we do not want the user to be able to manipluate the folder / files by mapping to the location. Then if the user wants to work on the file he requests it through the application which then copies it locally to their machine.
The way that I can see this working is by having a service running on the server that has access to create folders and files in this location. The user can then request the creation of a folder / file through the application which then instructs the service to create the folder / file.
Is there anyway that I can pass arguments directly into the service on the server, or would I have to create an entry in a database on the server that the service is monitoring and then performs the request?2a. If I do have to have the service monitoring the database if I make the service check this every second will this slow the server down and will the server guys at a company be OK with this running this quick?I also need to be able to let the user know through my application that the folder / file has been created successfully, therefore what is the best way to do this? Again get the service to write to the database that the request has been completed? If this is the case then my app will have to poll the database continually to check the database that the request has been completed, this could slow the application down?
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Aug 25, 2009
i want to call one (executable) file form another Application's (Main) mnu_Click event.how to call exe in Main Application.what code should be written in Config.exe?
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Feb 21, 2010
Im trying to call a procedure to run into a thread..But this procedure requires two arguments. How can I pass these arguments in to the function when the thread call:
Dim myThread As New Threading.Thread(New Threading.ThreadStart(AddressOf PopulateTermList myThread.Start()
addressof PopulateTermList should only be called without parenthesis(the VB tells me this)
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Jan 19, 2010
I have a listView control on one of my form. It contains no of records. Now my question is how to pass a particular record or its reference to another form i.e. I have designed a form which display's the details of a particular record (Searching facility is there in that form.). When user double clicks on the particular recode in the listView, I want to load that record into the 'search form' (i.e. the form which displays the full details of a particular record).
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Feb 20, 2010
Is possible? I plan to backup mysql database using vb.net.
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Oct 19, 2009
Ok im going to make a updater for a current program. And I found this code on this website.
Dim OnlineLocation As String = My.Application.CommandLineArgs(0)
Dim LocalLocation As String = My.Application.CommandLineArgs(1)
My.Computer.Network.DownloadFile(OnlineLocation, LocalLocation)
MessageBox.Show("Update Complete")
But i was wondering, once ive made it. How do u actually pass arguments to it.
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May 15, 2009
I am running an exe program from VB (Visual Studio 2005). This exe program accepts 3 parameters.I am passing the first parameter as a string and the next 2 as parameters from the Sub. However, the exe program treats all of them as string. I tried to use "&" and "+" between arguments and got the same results.[code]...
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Sep 4, 2009
how to use Visual Basic to pass arguments to an application after said application was started. Example, "myapp.exe -d" enables debug mode, I want to be able to start myapp.exe then have a checkbox labeled "Debug mode" in Visual Basic. Upon "Debug Mode" being checked, it passes the argument -d to myapp.exe. Upon it being unchecked, it withdraws that argument from myapp.exe.
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Oct 23, 2010
I've constructed a custom System.Windows.Forms.Form that requires arguments to New. I want to use one of these as the MainForm in a Windows Forms Application. How do I get the Application Framework to pass those arguments as needed?
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Sep 6, 2011
Is it possible to pass multiple arguments to a delegate method from a list(Of T).ForEach call?So, I'd like to pass a listbox object to the delegate routine below:
Sub test()
Dim names As New List(Of String)
names.Add("Bruce")
names.Add("Alfred")
[code]....
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Mar 16, 2010
I've got the following code:
[code]...
The problem is that, when I call the "SetStatusBarText" sub from another thread, InvokeRequired is True (as it should be), but then my threads stall on the Me.Invoke statement - pausing execution shows them all just sitting there, not actually invoking anything.
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Dec 22, 2009
I'm trying to do some calculations with the backgroundworker and display a window with a loading animation on it. The calculation is working but the loading animation isnt moving.MeasurePolygons is the Sub that does the calculations and updates the variables to hold the values of the calculations which works fine. Its just the loading screen. It pops up as it should but just doesnt animate
Private Sub ClickEvent()
BackgroundWorker1.RunWorkerAsync()
If Window1.frmLoading Is Nothing Then
[code].....
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Aug 27, 2010
I have a filesystewatcher object. On it`s event it runs a procedure which fills a treeview with a data. I had problems with treeview methods, but when I run them using invoke method everything is ok. But I still have one problem. When I load the form for the first time, everything works fine. But, when I then close the form (me.dispose, me.close), and load it once again, when Filesystemwathcer start the procedure i have an exception "invoke or begininvoke cannot be called on a control until the window handle has been created" trying to run a treeview.invoke method?
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Nov 22, 2011
I'm trying to figure out how to solve this problem. I've already added the reference, "WindowsBase" and imported the "System.Windows.Threading" Namespace but I'm still encountering an error like the one written in the title of this question.
[Code]....
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Dec 3, 2010
I am using the following code to test a problem I am trying to solve.[code]the application leaks memory slowly but noticeably.how do I clean up (or dispose of) each delegate I am creating? since there is no d.dispose?
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Apr 10, 2009
What is Platform Invoke Service (P/Invoke)?
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Oct 13, 2010
We have a UI with a progressbar. I know how to invoke, safely, the control from which it was not created from a thread. there are threads being processed in a threadpool, all of which calls an "agent" (which is a notifier to raise an event back to the UI to then increase the progressbar). an "agent" is set as a property in a State object, which is then passed into a method which will be executed on the ThreadPool. so, I invoke on the UI the method to update the progressbar, but the bar does not seem to update at all (screen frozen) and it takes a very very long time for it to execute. without threading, no problem.
[Code]...
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Apr 28, 2010
i am using wpf,vb,vs2008,.net framework3.5, in my application i am trying to show one progress dialog during the calculation done in backend.so i am running progress dialog and then in a new thread i am executing the calculation operation using dispatcher.begininvoke(priority normal). in this dispatcher operation i want to update the progress dialog .if i am trying to do somethimg then that update after the completion of dispatcher operation only .i want to show the message in mean time.
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Feb 26, 2010
i am using wpf,vb,vs2008,.net framework3.5, in my application i am trying to show one progress dialog during the calculation done in backend.so i am running progress dialog and then in a new thread i am executing the calculation operation using dispatcher.begininvoke (priority normal). in this dispatcher operation i want to update the progress dialog .if i am trying to do somethimg then that update after the completion of dispatcher operation only .i want to show the message in mean time.
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Jun 8, 2012
I have two tables:
table1
case_no flow result
tc_1 001 pass
tc_1 002 pass
tc_1 003 pass
tc_2 001 pass
tc_2 002 fail
tc_2 003 pass
table2"
case_no result
tc_1 pass
tc_2 fail
Table2 should be updates from table based on the results... If all results is PASS then the table2 should be updated as pass... if any result is FAIL then the entire case_no should be updates a s fail..
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Jun 19, 2009
This code was working consistently, but now...This code works on the first pass.Then second pass it just hangs on Code:Dim tcpClient As TcpClient = tcpListener.AcceptTcpClient() for about 2 minutesThen the code will fork for another pass, then fail.....
Code:Imports SystemImports System.TextImports System.Collections.GenericImports System.XmlImports System.Xml.LinqImports System.Net.Sockets
[CODE]....
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Jan 15, 2010
Just started VB programming this week and have found a wealth of information about what I'm trying to do. Problem is, some of it is more complete than others.Here's what I'm trying to do:In Form1 (my main form), I want to instantiate a class that contains a couple of properties (speed setpoint and position setpoint). When I click a button, I want to pass this data to Form2 and populate two textboxes on Form2 with the properties of this object. I want to manipulate the property values on Form2 and click an OK button which closes the dialog and returns the manipulated data, updating the property values of the object. Here's the algorithm I'm following:1) On Form1, instantiate the class2) On Form1's "Pass Data" button click event handler, instantiate a Form2 object and invoke the ShowDialog method, passing the object as a parameter.
3) On Form2, overload the ShowDialog method to accept the object as a parameter and modify the method so that it returns the manipulated class data.4) On Form2, in the ShowDialog method, populate the textboxes with the class data that was passed in.Here's where I get stuck. If I press the OK button on Form2 (DialogResult.OK), it returns me to Form1, but what hook do I have in Form1 to receive the manipulated class data that the ShowDialog method is returning?Here's an example of what I'm thinking about:
Code:
Public Class Form1
Dim clsController1 As New MotionController
[code].....
I'm sure it's probably a very elementary question, but every explanation I've found seems to be incomplete.
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Oct 12, 2009
how do i create dll application in vb.net? how do i call a dll application from an exe application?
using VB.NET, is there sample code where an exe application invokes a dll appliction?
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