I simply want to find documentation about invoke and begininvoke. A member of delegates. simply searching on it on bing and stuff don't show anything. It shows control.invoke, etc.In the delegate msdn entry there is no invoke member. At least not when I look for system.action or system.func.Where can I found begininvoke documentation? what will happen if I put nothing as callback function for example? Intuitively the program simply don't call any call back function but hei, I want to makes ure of it.
Private Sub UpdateInfo(ByVal text As String, ByVal timeStamp As DateTime) If Me.lstStatus.Dispatcher.Thread Is System.Threading.Thread.CurrentThread Then ' Do stuff with
I am having a small 'head banging' experience working on one of our DLL products.The problem I am having is that this application is an outlook addin, and as such, does not own its own Message Pump. No problems there, I have a UI class, which starts a thread, and calls Application.Run(new fControlForm)
I use the Application.Run passing a form, rather than an ApplicationContext purely because I want this form to be in charge of displaying other forms: ie, I can use BeginInvoke to ensure that a second, and many more forms are created in the context of the thread that owns the Message Pump.
I however feel this to be quite hackish. I get a form displayed at startup (which I am sure I can hide if I needed to)My question: IS there any way to create some form of Invoke procedure in an applicationContext that uses the Message Pump thread? I have created a class which implements the ISynchronizeInvoke and can Invoke from a thread that it owns, however this is not the same as invoking from the Message Pump owner.
instead of using if control.invoke required in a procedure can I just call the procedure with begininvoke?I have, possibly, the following:
Private Sub UpDateTimer_Elapsed(sender As Object, e As System.Timers.ElapsedEventArgs) Handles UpDateTimer.Elapsed UpdateTime() If MicActive Then PTTCancelTime += 1
So from the comments section where this persons code was translated to VB.NET on [URL]it shows a little code to aid in calling cross thread UI stuff.
<System.Runtime.CompilerServices.Extension()> _ Public Function SafeInvoke(Of T As ISynchronizeInvoke, TResult)(ByRef isi As T, ByRef [call] As Func(Of T, TResult)) As TResult
[Code]....
Error 1 Data type(s) of the type parameter(s) in extension method 'Public Function SafeInvoke(Of TResult)(ByRef call As System.Func(Of frmLogin, TResult)) As TResult' defined in 'GvE.Globals' cannot be inferred from these arguments. Specifying the data type(s) explicitly might correct this error. C:GvEGvEfrmLogin.vb 37 9 GvE
I'm calling that code from inside a method defined in a form but that method is being called from another thread.
Just trying to avoid delegates and this is what the code above is supposed to do, but just can't get it to work.
We have an VB.net application that is being moved from one box to another. It runs great on the old box. The new box is configured the same as the old one but is on newer hardware. When I run the application on the new server it complains that the adobe toolkit that we use can not be found.
I have an annoying bug which is very difficult to replicate. When I start my application, from time to time, I get this error message "Invoke or BeginInvoke cannot be called on a control until the window handle has been created". This makes the user think the application is unstable... I have no idea what could cause this problem. The application uses a splash screen. It's built in Visual Basic using VS 2010 and .net framework 4.
I have a thread that loads a control from the database during a long running operation. If I close my window before that thread finishes, it throws a Invoke or BeginInvoke cannot be called on a control until the window handle has been created., when doing the Invoke.I've modified the code to look like the following:[code]However it still hits the Invoke line and throws the error. When debugging stops on the exception, IsDisposed is true, .Created is false, and .IsHandleCreated is false.how do i prevent it from running the invoke line in this situation?
I have a (legacy) form where I had to add the InvokeRequired/BeginInvoke(Delegate) to avoid the "Control control name accessed from a thread other than the thread it was created on." exception.This seems to work fine but there are some scenarios where the BeginInvoke is not calling the Delegate (which I can tell from the output log). [code]
Disclaimer: I know that Thread.Abort is evil. I'm using it as a last resort since some I/O functions (e.g., File.Exists when used on a non-existing network share) block for a large amout of time and do not allow you to specify a timeout.
Question: Is it possible to Abort (as in Thread.Abort) a worker thread started using Delegate.BeginInvoke or do I have to do the Thread handling myself?
I am referring to this document on MSDN. I understand what ".BeginInvoke" does, however looking at the example code on the document.[code]The delegate myDelegate (and the DelegateMethod) accepts a control and a string, but, at the .BeginInvoke, a Label control is passed and an array.[code]Shouldn't a string be passed instead of the array? Am I missing something?
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.
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.
i AM TRYING TO USE A THREAD TO UPDATE SOME CONTROL during runtime using invoke and i get this message.here is my scenario:im trying to build a performance monitor tooli have a mainform that is MDI parent and i create mdi child using
I am trying to use xml documentation tool in my application. one of my methods receives 'ParamArray' as an argument. i want to document this argument elements.
here is my code Public Sub LoadSearch_ByEmployee(ByVal EmployeeID As Integer _ , ByVal FromDate As Date _
I have written up troubleshooting documents for my project and would like them included in my program. I remember in VB6 there was a very easy way to do this with a control, where it already has the help document tree set up on the left and you just set it to point to certain files.
Does something like this exist for .NET? I am aware of the HelpProvider control but as far as I know this just puts in tooltips and opens documents on a button press?
The regularity and frequency of that extolling is an indication of how many people, for whatever reason, don't use the documentation. Some say that I've forgotten what it's like to be a beginner, but I remember using the MSDN documentation as a beginner. I remember that I couldn't always find what I needed and I also remember that I didn't always understand what I found. More importantly, I remember that that didn't stop me using it first every time I had an issue and I also remember getting better at using it over time. So, I'm genuinely interested to know, if you don't use the MSDN documentation?
Currently I am using this code to check for Firefox on a 32 bit machine
Code: Dim Firefox32 As String Firefox32 = My.Computer.Registry.GetValue _ ("HKEY_LOCAL_MACHINESOFTWAREMozillaMozilla Firefox 5.0in", "PathToExe", Nothing) MsgBox("The value is " & Firefox32)
If the value is found then the above message is fine, but if the entry is not found I want it to display a message like: "Firefox could not be found" instead of "The value is: " What code would make this appear?
However, I get an error in the call to BeginInvoke (the UpdateApplicationDataUI portion of the delegate is stating "Expression does not produce a value").
Me.Dispatcher.BeginInvoke(Function() New Action(AddressOf UpdateApplicationDataUI))
I am simply searching how to obtain errors/warning for each function/member that isnt documented. Im pretty sure I managed to do this on one of my projects, but cant find how to do it here on my workstation. I have looked into the project props, the solution props, but cant find it. I must have missed something, or maybe I could do this at home with an extension.
I was wondering what options i have in order for me to create documentation for the applications i write? i.e. Some documentation for code written and some general comments on what the application is doing etc?
After a quick search i noticed a few options but most seem to be using VS 2003 (prefer something for 2010)
When i perform unit testing on routines, using the unit testing framwork provided by VSTS, i need to get a output of the unit test and result on to a document (documentation). how do i do i do this?
One of the Projects in my VB.NET Solution seemed unwilling to let me write XML Documentation in my code. When tapping ''' on the line directly above a method declaration, nothing would happen. The project consisted of modules and classes only(no forms), so I initially thought that had something to do with it.
Later I found that under project properties and the Compile tab, the "Generate XML documentation file" checkbox was left unchecked. Checking this instantly allowed me to place the comments normally. After doing some testing, I also found that Creating an Empty project leaves the checkbox unchecked, while creating a Windows Application automatically checks it.
how to call or reference an item from an xml document. I hava a java app that i'm converting over to vb.net. The java application uses the digester class to to parse the information. The app uses 2 classes and the xml file. one class is the Vb.net Parameter class (fully converted from Java to vb.net) that pulls the information out of the xml document and then places it when called into the 2nd class file.
I'm pretty sure that i need to use the system.xml class to do this however i'm having or just not reading the examples properly.
I have partially converted the code over to vb.net, it still has some java references.
