Global Instance In MDI Application
Apr 29, 2011given a MDIParent Form and 2 MDI Children: frmChild1, frmChild2..How can i realize a Instance of MyClass in MDIParent, which I can read and write from frmChild1 and frmChild2 , too
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Transfer Control To The New Instance In A Single Instance Application?
Jul 15, 2011I have a single instance VB 2010 application I know how to communicate with the next instances run through the StartupNextInstance application event. The usual way of working with this is parsing command line arguments of the new instance and continue execution of the old instance. What I would like to do is replace the running instance with the new one. Is there any way to do this other than disabling the single instance property ?
View 1 RepliesCreate A "Global" Instance Of A Class?
May 30, 2012I have a Public Class named UserData which consists of Login and Password properties, as well as various permissions related properties.
I declare an instance of this class in a Public Module (named DatabaseFunctions) as
Public User As New UserData Functions in that module are able to access the instance as expected. How do I access said instance from outside of the module?
Until now, I've only needed to utilize the information within that instance from within the module, so I didn't realize that I wasn't able to access it externally. Now, I need to display data contained in that instance on a form.
I had assumed I would be able to use User.Login outside of the function in which it was declared, since everything was declared as Public, but it seems I was mistaken.
Creating Single Instance Form In MDI Application - Check Whether Form's Instance Created Or Not?
Feb 8, 2012creating single instance form in MDI Application. How to check whether form's instance created or not?
View 6 RepliesC# - Application Variables Global To Webgarden?
Jan 12, 2010I am currently trying to program an online drawing program using the HTML5 canvas.the thing is, I need to have the current canvas saved somewhere globally. Static variables work, but they do not get shared across a Webgarden. This results in two different drawings being created.I will have to somehow create a new application object which is shared. I figured I will need an external application holding them.
1) How do I replace the application object with my own?
So either I will have to make my own program and call to it with remoting or use the ASP.NET session state server for application variables. I favor the Session State Server though.
2) How do I use the session state server for my own variables? How do I access it?
I searched high and low on the internet and only found the ideas mentioned above, but no help executing them.
I mainly code in VB.NET, but I can also understand C# code for examples.
A little info on my application:The client side has two canvas objects on top of each other. The top canvas object us used for drawing stuff, the canvas object below it holds the drawing in the end.When something is drawn, it is sent to the server in it's base64 representation. (getDataUri).The server puts this graphic on top of a stored Bitmap object through a Graphics object.
How the changes are being distributed to the other clients, I am working on that right now. Either I transfer the complete picture or each and every change that is submitted. This should work through Server Push. If this does not work thoroughly I will have to save and timestamp changes. A link to the current implementation, which is not currently fetching changes (but they get transfered to the server... With the problem that some reach one instance some reach the other on either w3wp in the webgarden) from the server is here: http:[url].....
Create A Global Function To Use Throughout The Application?
Jul 7, 2011I want to create a global function to use throughout my application. Let say it's about the connection to the database.My code that i plan to use in my global function is:
myConnection = New SqlConnection("...........")
myConnection.Open()
So that I can call it to use in every form throughout my application. This can make me easy to edit the connection later.how to define this global function and how to call this function in the form.
Defiine A Global Variable For The Whole Application?
Aug 26, 2009How do I defiine a global variable for the whole application so that it does not have to be defined in all the forms that need it.
View 6 RepliesGlobal Hotkey Working For Application
Mar 17, 2012I have implemented a global Hotkey into my code but the problem is that when I move the focus from the form to IE (For Example) i cannot use the Hotkey from my application. Everything is working great if I was to stay int the form but that's not the purpose of this code.
Private Sub frmMain_Load(ByVal sender As System.Object, e As System.EventArgs) Handles MyBase.Load
RegisterHotKey(Me.Handle, 9, MOD_ALT, VK_F9)
End Sub
Private Sub frmMain_FormClosing(ByVal sender As Object, e As
[Code] .....
.net - Global Entity Framework Context In WPF Application?
May 20, 2010I am in the middle of development of a WPF application that is using Entity Framework (.NET 3.5). It accesses the entities in several places throughout. I am worried about consistency throughout the application in regard to the entities. Should I be instancing separate contexts in my different views, or should I (and is a a good way to do this) instance a single context that can be accessed globally?
For instance, my entity model has three sections, Shipments (with child packages and further child contents), Companies/Contacts (with child addresses and telephones), and disk specs. The Shipments and EditShipment views access the DiskSpecs, and the OptionsView manages the DiskSpecs (Create, Edit, Delete). If I edit a DiskSpec, I have to have something in the ShipmentsView to retrieve the latest specs if I have separate contexts right?
If it is safe to have one overall context from which the rest of the app retrieves it's objects, then I imagine that is the way to go. If so, where would that instance be put? I am using VB.NET, but I can translate from C# pretty good. I just don't want one of those applications where the user has to hit reload a dozen times in different parts of the app to get the new data.
All contexts are created in Using Blocks to dispose of them after they are no longer needed.When loaded, all entities are detatched from context before it is disposed.A new property in the MainViewModel (ContextUpdated) raises an event that all of the other ViewModels subscribe to which runs that ViewModels RefreshEntities method.After implementing this, I started getting errors saying that an entity can only be referenced by one ChangeTracker at a time. Since I could not figure out which context was still referencing the entity (shouldn't be any context right?) I cast the object as IEntityWithChangeTracker, and set SetChangeTracker to nothing (Null).
This has let to the current problem:When I Null the changeTracker on the Entity, and then attach it to a context, it loses it's changed state and does not get updated to the database. However if I do not null the change tracker, I can't attach. I have my own change tracking code, so that is not a problem.
My new question is, how are you supposed to do this. A good example Entity query and entity save code snipped would go a long way, cause I am beating my head in trying to get what I once thought was a simple transaction to work.
Application Like A Shopping Cart - Global Variable?
Dec 27, 2011My project is to create a shopping cart application. I have my main form and from there the user can go to two different forms to add books to their cart, the cart being the main form. This all works. What I can't figure out, is how to use global variables for the prices, shipping, tax and updating the total. I have places for this information to show up on the main form, and I've created a module for the calculations and prices, but I don't know how to code it to get the prices to show up in the specified areas.
View 3 RepliesApproach For Handling Global Application Object?
Jun 15, 2009What is the recommended way in VS.NET to have a global application handler object? Something that can load/verify/return user folders, settings, application specfic settings, manage the unhandled exceptions, etc. I would have a class that has most of the code, then subclass it for each application.
I can create one if I start as a module instead of a form. But then I lose some options such as NetworkAvailabilityChanged, etc. I define a "Public" object from within a form (I don't think so and don't feel this would be the right approach.)?can I "attach" an object to an existing global object store (such as "My."), etc.?
Once created, any object in my application should be able to reference methods/properties of this application object to get default folders, user values, etc. as necessary.
C# - .NET Global Exception Handler In Console Application?
Jun 28, 2010I want to define a global exception handler for unhandled exceptions in my console application. In asp.net, one can define one in global.asax, and in windows applications /services, one can define as below
AppDomain currentDomain = AppDomain.CurrentDomain;
currentDomain.UnhandledException += new UnhandledExceptionEventHandler(MyExceptionHandler);
But how can I define a global exception handler for a console application ?currentDomain seems not to work (.NET 2.0) ?
Changing The Object Declarations To Global Using The 'global' Keyword Evertime?
Mar 15, 2012evrytime i add new controls to a form in vb.net the designer regenerates code and asks me to make corrections, so i have to keep on changing the object declarations to global using the 'global' keyword evertime it regenarates code,especialy dataset objects.how can i prevent this?
View 1 RepliesSingle Instance Application Is Checking For A Totally Different Application Being Run?
Aug 26, 2009I'm writing vb.net code with MS Visual Studio 2005.When running my application I get "foo.exe is already running on this machine".(Even though I'm running faa.exe instead
View 14 RepliesVS 2008 Project / Application Global OleDbConnection Object
Jun 17, 2009I need a single, global OleDbConnection. One which will be available to use throughout my app/project. Another project like a custom UserControl? I should mention I'm not using TableAdapters, BindingNavigitor, etc. The datasource is not associated with my project. I communicate with the Db through code I write. I'm just a hack trying to ride with the big dogs while I develop an app for my job... We were/are in the stone-age!!!
View 7 RepliesUse Global X As String In Vb6 In A Module To Declare It With Global Privelages?
May 1, 2009i could use Global x as string in vb6 in a module to declare it with global privelages, how can i do this in vb2008? how to declare a global variable in vb2008? so that i could use it anywhere i want. i know global variables are not recommended in programming but i need one.
View 4 RepliesException Handling In Winforms Application Using A Global Error Handler?
Sep 9, 2009I have a Windows Form application that has a global error handler to display unexpected errors.
Namespace My
Class MyApplication
Delegate Sub ProcessParametersDelegate(ByVal sender As Object, ByVal args() As String)
[code]....
1) for the same deployed code, I SOMETIMES get line number in the displayed StackTrace error message and sometimes do not, even when the error message includes source code that I have written rather than a referenced binary. The project is compiled with a DEBUG configuration.
2) The application strangely minimizes to the tray when the error occurs (I thin it is unlikely that anyone can diagnose this issue w/o my more code posted, but I'll mention it anyways)
3) When I try to intentionally raise an error by, for example, dividing by zero hoping to test by global error handler, I get a dialog error message from the interactive debugger rather than jumping into my global error handler (which i want to debug because there is more to it than I posted.) Do you have any idea how to triggerand force teh execution of the global event handler?
VB2010 - Call Application.Run() In Application Without A Form - "Object Reference Not Set To An Instance Of An Object
Nov 12, 2009My problem is when i try to call Application.Run() in a application without a form i get "Object reference not set to an instance of an object." when i run it outside VS. but if ran in debug or release mode it works just fine. i may just be forgetting to setup application right, but ive done it before in this same manor and it worked fine.
Sub main() 'this runs first.
AddHandler Application.ApplicationExit, AddressOf ExitEventHandler
dbg_f("handle added")
[CODE]...
Commented out init_timer and init_ready, and now it causes the same error for the myName line. there seems to be something wrong with class Application. btw theres seems to be something wrong with the forum code formatting.
Avoid Another Instance Of Application?
Jan 14, 2010I can cheack another instance running r not then i closed the newly created instance
but nw my problem is i need to show the previously running instance if the previous instance minimized or hided
i m using the foolowing code to find the previous instance[code]...
How To Kill An Instance Of An Application
Jul 15, 2011I am having a text file in this path "C:Test est.txt" when this was openeed I need to close this.
When I am trying to use the below code all the instances of notepad are closing and I don't want that to be happened and I want to close only the ".txt" file:Here is my code:
Dim Process() As Process = System.Diagnostics.Process.GetProcessesByName("notepad")
For Each p As Process In Process
p.Kill()
Next
Make Only One Instance Of An Application Run?
Dec 9, 2008I use this code but it doesnt seems to work...
If Process.GetProcessesByName(My.Application.Info.ProductName).Length > 1 Then
MsgBox("Program already running!.")
End If
EDIT: ShowInTaskBar = False
Avoid Multiple Instance Of An Application?
Oct 19, 2010I developing a windows application. i dont want to allow multiple instance of the application how i will achive that?
View 1 RepliesMake Single Instance Application, What Does This Do
Aug 25, 2009in vb 2008 express this option is available under application properties. does anyone know what is its function? does it make it so that it's impossible to open two instances at the same time?
View 3 RepliesRestarting A Single Instance Application?
Apr 13, 2009Is there any way of restarting a single instance application, which is deployed via clickonce?
View 1 RepliesShare An Instance Of A Class Across The Application
Feb 8, 2012I am creating a Windows application using VS 2008. This has a MDI Parent form that hosts multiple MDI children forms. I have a login form that authenticates the user and creates an instance of a user class. This has information such as UserID, Name etc. I would like this instance available to other windows. How would I implement this functionality?
View 2 RepliesVS 2010 - Single Instance Of Application
Jul 12, 2010i am using "Animated Window Effects with "Toast" popup demo" code from the code bank created for jmcilhinney. I put a NotifyIcon control on it and check Make single instance application on the project properties windows. the problem is that every time that i launch the app it creates one instance on the system tray of the app. i can not figure out how to over come this attached is a copy of my project.
View 10 RepliesCreating An Instance Of MS Project Application Fails In .Net?
Apr 18, 2012In my VB .Net code, I am trying to create to launch MS Project Application. Dim prjApp As Microsoft.Office.Interop.MSProject.Application = New Microsoft.Office.Interop.MSProject.Application
But I am getting the exception as follows:
"Creating an instance of the COM component with CSSID {36D27C48-A1E8-11D3-BA55-00C04F72F325} from the
IClassFactory failed due to the following error: 80010001".Note: This exception happens in 64 bit Windows 7 German OS. But the same code runs successfully in 32 bit Win XP (German and English) and 64 bit Windows 7 English OS.I have even tried the following steps in German 64 bit Win 7
1. Running the application in Administrator mode
2. Setting UAC to low.
3. Re-installing MS Project in German 64 bit Win 7.
Implement Multi-instance Database Application?
Jun 2, 2011I want to learn the Database application programming. Especially, the multi-user environment. User can update the data at the same database. So, could you give me some advices ? Does it should use SQL server db ? How to connect with the the SQL server from other PC user ?
[Code]...
Keep Single Instance Application Maximized After Restore?
Feb 17, 2012I have a VB .NET application set as single instance. When I try to launch the application the second time its window is restored to its normal windowed state instead of being maximized (like it was before attempting the second launch). How can I make the application window to preserve its last state?
View 1 RepliesMake An Instance Of A Form Accessible Throughout The Application?
Feb 10, 2009assume that i have two forms(form1 and form2)form1 code
Imports System.IO
Public Class Form1
Inherits System.Windows.Forms.Form
[Code]....