Manually Raise The PropertyChanged Event Of An EntityObject?
Aug 23, 2009I am trying to raise the PropertyChanged event of an EntityObject, I don't find a way to do it?
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Use Raise Event To Raise A Programmatically Added Event
Jun 12, 2011i guess the title pretty much states the question but i will give the senario to be more clear. i have a mousemove() event which i add in my program programmatically and i need a way for raising that event (again) programmatically too. raiseEvent control_mousemove() doesn't work as it says that "'control_MouseDown' is not an event of 'main'."
[Code]...
PropertyChanged Event Fires Twice And Should Not
Mar 14, 2011I have a class with two descendent classes (child, grandchild):[code]When a property changes in the Measurement class I raise a OnCrucibleOxidizedMassChanged event:[code]However, the OnChanged sub gets called twice, even though I only assign a value to CrucibleOxidizedMass once.
View 1 RepliesPropertyChanged Event Cause Get/Set For All Persisted Properties
Aug 8, 2009I have constructed a graphical user control using VS2008 and I am testing it in a solution that includes the control project and a sample form with the control and some configurable settings. In the test application I have persisted a few of the control property values in user settings.
I am using a standard template for all the property Sets in the control:
Set(ByVal Value As Integer)
If my[-propertyname-] <> Value Then
my[-propertyname-] = Value
[Code]....
Whenever the user changes a property in the control using a procedure in the test app, the PropertyChanged event is causing a GET (settings value) and SET (control property) for every property of the control that has been persisted by the test app, including the property for which the user just made the change.
I can understand that the settings code is listening for PropertyChanged events in order to keep the settings values updated (and I can trace the Get (control property) and Set (settings value) that is executed immediately after the property changes), but why should it also hook in a complete re-initialisation of all control properties every time the user changes one control property?
C# - Respond To Descendent Class PropertyChanged Event?
Mar 10, 2011I have a class, BaseSample, that uses another class, MainData, as one of its fields:
Protected _sampleData As MainData
Public Property SampleData() As MainData
Get
[code]....
MainData in turn has a collection of a class, ProcessData, as a field and ProcessData has a collection of a class, Measurement, as a field. I.e.:
MainData
|- IEnumerable (Of ProcessData)
|- IEnumerable (Of Measurement)
These classes are entities in a LINQ to SQL file. In the Measurement class, I raise the PropertyChanged event when the CrucibleOxidizedMass property changes:
Private Sub OnCrucibleOxidizedMassChanged()
RaiseEvent PropertyChanged(Me, New ComponentModel.PropertyChangedEventArgs("CrucibleOxidizedMass"))
End Sub
In the BaseSample class, I want to respond to the CrucibleOxidizedMass PropertyChanged event in any of the descendent Measurment instances. How would I do this?
VS 2008 Cross-thread Error, Change Control Property By (other) Class Event PropertyChanged?
Apr 1, 2010I need some help to understand my options to get this working. I try to update a textbox control by a property-changed event from a class variable. I've digged around for a day and have a vague understanding that this can be solved in three ways:
1. Using some "if InvokeRequired", "Invoke" code in the handler method
2. By programming a special delegate class for this variable
3. By using a databinding directly linking the control (textbox) to the class event
Now.. Are these options correct? And would it be possible to get some help to show these three solutions in actual code (relevant to mine)? I can't seem to manage to sort all the information to a working code. Also, what are the pros and cons of the different solutions?
As my code stands now, it's obviously none of the above, as it gives a cross-thread error, as indicated.
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[Timer] Trigger Event Manually - User Must Wait For A Minute Before The Event Is Triggered
Feb 12, 2010Eg. ""vb.net" timer event trigger on purpose". This application is meant to run at all times to download a web page every minute. To avoid freezing the UI, I read that the best solution is to move the code from a While/Sleep loop to a Timer that will be triggered every minute. The problem I have, is that the user must wait for a minute before the event is triggered:
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
Timer1.Interval = 60000
Timer1.Enabled = True
[CODE]...
Is it possible to force this event to occur instead of waiting for it?
Raise Event - Put An Extra Event In - UpdateID And It's Not Firing
Aug 9, 2011I am trying to put an extra event in, UpdateID and it's not firing.
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Industrial App: Raise An Event For Something That Doesn't Have An Event?
Sep 15, 2010I want to raise an event for an opto-input state change but not sure if I can. Basically I have 4 opto-inputs on a PCI control card - one of which changes pretty rapidly - that I currently poll with a timer. I'm looking at getting a proper hardware counter for that but the other 3 are production status indicators. I'd prefer it if they alerted the app to a state change though.
Depending on the state of one of the inputs I have to fire a relay which simulates a button push. Having been playing with serial ports and getting a very useful app built for logging production data into a SQL Server DB I want to re-visit a proof-of-concept system I built a few months ago.
Current code - which works fine - but I'd like to change is like this:
Private Sub tmrOptoInput_0_Tick(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles tmrOptoInput_0.Tick
'Read OptoInput_1 to Monitor Track State...
Dim aType As Byte ' replace Byte with any other type
[code].....
Having 4 inputs so I need 4 timers, plus another one that polls the database and checks a status flag which triggers the app to start logging. I'd like it to be event driven rather than timer driven if at all possible but I don't know how and there's nothing in the control card docs. Also I can't seem to find anything relevant on the web.
How To Raise Event In Vb Asp.net 2.0 ?
Sep 14, 2010How to raise event in vb asp.net 2.0 ?
View 2 RepliesRaise Event After All Others Done?
Apr 8, 2010Is it possible to run a sub routine on my form after all other sub routines have finished? I am having a problem using a filewatcher that watches a certain path and runs an SQL job if a certain file is pasted. For some reason my procedure leaves a file behind sometimes and others it does not. I was wondering can I use a form event to run a different procedure after all other sub routines on the form are completed that would check this directory for remaining files again?
View 1 RepliesC# - Raise Event Using AddHandler?
Sep 28, 2009I am comfortable with Vb.Net events and handlers.how to create event handlers in c#, and raise events.
View 4 RepliesDifferent Methods To Raise Event?
Dec 15, 2011Normally I raise an event like this:
RaiseEvent PropertyChanged(Me, New PropertyChangedEventArgs(propertyName))
Event Which Raise When A Processes Comes Up?
Mar 13, 2011I want to act with a service (kill the procces) whenever a process (executable file) comes up.Obviusly it is an Event but I don't know what event is.
View 1 RepliesRaise An Event From A Class?
Mar 11, 2009I'm trying to raise an event from a class. It looks ok but it did not raise the event as expected...?
Steps
1 - Load the form2
2 - Boutton1 call the form1 and load the class animation
3 - Class animation raise the event for the form1
Here is the code !
Public Class Form1
Private WithEvents AnimationTextChange As Animation
Public Sub mdiMainEvent_StatusTextChange(ByVal _text As String) Handles
[Code]....
Raise An Event In Vb2003?
Jan 28, 2010how to raise an event in vb2003
this my
Public Class Form1
Public Event TimerStart()
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs)
[Code].....
Raise An Event When The Property Value Changes?
Jul 13, 2011I have a class with a property, and I want to raise an event when the property value changes, but I have no idea how to declare events, or call them?
View 6 RepliesRaise Event And OnClick?
Sep 27, 2009I have a button that I need to use twice, the first time I click it, it validates that a string inside a textbox is a certain length. That part works. What I want to do is press the same button again but when I press it the second time it is suppose to popup a hidden label. But when I try to use a raiseevent command it gives me an error saying "the button is not an event in my program" tell me how to use the OnClick?
View 9 RepliesRaise Event BindingSource_AddingNew?
Mar 26, 2012How do I format,
EventzBindingSource_AddingNew(EventzBindingSource,
???)
to raise this event:
[code].....
Raise Event From A Sql Database?
Nov 29, 2010I have an MDI parent form and 2 child forms. Each child form has data bound controls bound to the same sql table; one from is for displaying data and the other is for editing data. After the editing form closes, I need to update the data in the display form (if it is displayed). I can think of a few ways to do this, but I would like the display form to simply respond to an event raised by the database. Is it possible to create (and raise) an event in the database proper? If not what is the best/acceptable way to update data on a data bound form?
View 1 RepliesRaise Event From Sub Class?
Sep 6, 2009I have 2 classes one main class called Mygrid and another class inside it called TLBoxEditingControl which inherits a textbox into grid cell.Also I have added one Listbox called LstBox to the usercontrol MyGrid.
1) Initially its visible is false. How can i make visible true in TLBoxEditingControl class.
2) I have an Event called MyList() in Main Class, how can I raise this event in TLBoxEditingControl class.
Here is the code i use, This is not working please expalin
Public Class MyGrid
Inherits DataGridView
Public Event MyList()
[code]....
I have added this control to a form and added this code
Private Sub MyGrid1_MyList() Handles MyGrid1.MyList
MsgBox("ggg")
End Sub
Here the event is not raising.
Raise Event On Setting Nothing?
Feb 14, 2011Is there is an event that get raised when oject of a custom/user control is set to nothing?
View 5 RepliesRaise Event When List Changes?
Jan 4, 2012I want to get an event when a list item is added.
Private WithEvents newMessages As New List(Of NewMessageList)
Private Sub VariableChanged(ByVal NewValue As Integer) Handles newMessages.listChanged
MessageBox.Show(CStr(newMessages.Count))
[code]....
This part is the issue: newMessages.listChanged because the even can not be found. What am I missing?
Raise The Event Handler?
Jan 18, 2012I converted some code from c# to vb, I have the following error:-
m_axCalendar.DoRetrieveDayEvents += New AxXtremeCalendarControl._DCalendarControlEvents_DoRetrieveDayEventsEventHandler(m_axCalendar_DoRetrieveDayEvents)
Red Error = Error1'Public Event DoRetrieveDayEvents(sender As Object, e As AxXtremeCalendarControl._DCalendarControlEvents_DoRetrieveDayEventsEvent)' is an event, and cannot be called directly. Use a
[code]....
I can get rid of Blue error by changing it to : AddressOf m_axCalendar_DoRetrieveDayEvents Not sure how to fix red error?
C# - Raise An Event Once I Reach End Of Method?
Jul 1, 2010How to raise combobox_SelectedIndexChanged(object sender, EventArgs e) programmatically? Lets say i have method called ClearFields(). I want to call the event before i hit the end of Clearfields() method.
View 4 RepliesC# - Raise That Event On The OtherXXX Instance?
Mar 20, 2012I need to transform the following in VB.NET from C# (.NET 4)
class XXX:
public event EventHandler ContentScaleChanged;
if (otherXXX.ContentScaleChanged != null)
{
otherXXX.ContentScaleChanged(c, EventArgs.Empty);
}
I cant' do RaiseEvent ContentScaleChanged(c, EventArgs.Empty), because I need to raise that event on the otherXXX instance...
Form Never Raise Paint Event?
Nov 12, 2011i've an owned form that never raise the paint event, and so i can't make it rounded...
View 6 RepliesHow To Raise Event In Mocked Interface
Jan 31, 2012I'm trying to raise an event in a mocked interface. I can get this in C#, but for some pain-in-the-butt reason can't get it working in VB.Net. Hopefully I haven't missed the boat conceptually and all I'm missing is some syntax. This is similar to the code I'm working with:
Public Interface ISendable
Event SendMessage(message As String)
End Interface
''**********
Public Interface IPrintable
Sub PrintAnnouncement(announcement As String)
[Code] .....
How to complete or correct the line in my test class that begins "sendable.Raise..."? Maybe there is more setup I need to do, but the Moq site didn't seem to indicate this is the case.
Raise An Event Across Classes And Module?
Nov 20, 2009I have a WinForms class that presents a TreeView of some network nodes. I have a separate module that interfaces with the network and detects when nodes are added or removed. I would like the module to trigger the TreeView when the network changes.Example
Public Class Main
Friend Sub TV_Main_Network_Click ( ByVal sender As System.Object, _
ByVal e As System.EventArgs) _
[code].....
Raise An Event From A Custom Class?
Nov 14, 2011I have a Windows Service project designed to monitor an email account and make entries into a SQL Server database when certain emails arrive. This is a rewrite of a similar winforms program that works just fine, except that it requires that the computer be logged into an account and the program started manually, which I can avoid by using it as a service.In the service I maintain a list of logged messages - basically just a string and a timestamp indicating that something has happened. (That list is shared out over a WCF service but I think that's immaterial, at least at the moment.) In my custom class I declare a public event, and elsewhere I raise that event. For some reason, though, the RaiseEvent isn't being run in the service. For example:
[code]...
The problem in this case is that _pc_HandleEvent isn't ever being called. If I duplicate this setup in a regular winform program, everything works like it should. What am I doing wrong? How do I get a service to handle events raised from other classes?