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dotnet clr
group:EventHandling problem : Java has solution but what about Microsoft???
dotnet clr:
I agree with what Herfried and Marina have written with regards to different controls of different types. The one place where I do find it useful to use a single event handler for multiple controls is with Button Controls. Take a look at the Button Command event. You can pass different CommandName and CommandArgument strings for each button while using the same Button Command event handler. This works with traditional Button controls as well as Link Buttons and Image Buttons. -- Andrew Robinson www.binaryocean.com www.bellinghamdotnet.org [quoted text, click to view] "Mahesh Devjibhai Dhola [MVP]" <dholamahesh@hotmail.com> wrote in message Hi,news:uL$KN7P9FHA.2832@TK2MSFTNGP14.phx.gbl... I have added few of the events in some control, example code is: btnControl.GotFocus +=new EventHandler(EventHandlingMethod); btnControl.Click +=new EventHandler(EventHandlingMethod); lblControl.Click +=new EventHandler(EventHandlingMethod); private void EventHandlingMethod(object sender, EventArgs e) { ....... } btnControl = Button object, lblControl = Lable object Now the problem is: I am adding the same event handler method in all events for btnControl and lblControl too. now in EventHandlingMethod method, i can find which control is using sender but now if i want to put some switch cases in the method for Event Name then I have no any such information in the eventargs or anyother way.... Can someone help/guide me to get the event name? Is it possible? if yes then how? If no, then any work around? Thanks in Advance Regards, Mahesh Devjibhai Dhola
If you need to do different things depending on the event, why not have =
different event handlers? You can place common code into a method that = both event handlers can call. I understand what you are saying, but it just doesn't seem like a big = deal. It is very easy to work around, and most of the time it is not = even an issue because you either need different code in the handler = anyway, or the events have different signatures, etc. "Mahesh Devjibhai Dhola [MVP]" <dholamahesh@hotmail.com> wrote in = message news:uL$KN7P9FHA.2832@TK2MSFTNGP14.phx.gbl... Hi, I have added few of the events in some control, example code is: btnControl.GotFocus +=3Dnew EventHandler(EventHandlingMethod); btnControl.Click +=3Dnew EventHandler(EventHandlingMethod); lblControl.Click +=3Dnew EventHandler(EventHandlingMethod); private void EventHandlingMethod(object sender, EventArgs e) { ....... } btnControl =3D Button object, lblControl =3D Lable object Now the problem is: I am adding the same event handler method in all = events for btnControl and lblControl too. now in EventHandlingMethod method, i can find which control is using = sender but now if i want to put some switch cases in the method for = Event Name then I have no any such information in the eventargs or = anyother way.... Can someone help/guide me to get the event name? Is it possible? if yes then how? If no, then any work around? Thanks in Advance Regards,
"Mahesh Devjibhai Dhola [MVP]" <dholamahesh@hotmail.com> schrieb:
I have added few of the events in some control, example code is: btnControl.GotFocus +=new EventHandler(EventHandlingMethod); btnControl.Click +=new EventHandler(EventHandlingMethod); lblControl.Click +=new EventHandler(EventHandlingMethod); private void EventHandlingMethod(object sender, EventArgs e) { ....... } btnControl = Button object, lblControl = Lable object Now the problem is: I am adding the same event handler method in all events for btnControl and lblControl too. now in EventHandlingMethod method, i can find which control is using sender but now if i want to put some switch cases in the method for Event Name then I have no any such information in the eventargs or anyother way.... ======= I am curious which sense handling different events of different controls in the same event handler would make. Instead, add separate event handlers for all event types, not just delegate types. This means separate handlers for controls' 'Click' and 'GotFocus' events. -- M S Herfried K. Wagner M V P <URL:http://dotnet.mvps.org/> V B <URL:http://classicvb.org/petition/>
Hi,
I have added few of the events in some control, example code is: btnControl.GotFocus +=3Dnew EventHandler(EventHandlingMethod); btnControl.Click +=3Dnew EventHandler(EventHandlingMethod); lblControl.Click +=3Dnew EventHandler(EventHandlingMethod); private void EventHandlingMethod(object sender, EventArgs e) { ....... } btnControl =3D Button object, lblControl =3D Lable object Now the problem is: I am adding the same event handler method in all = events for btnControl and lblControl too. now in EventHandlingMethod method, i can find which control is using = sender but now if i want to put some switch cases in the method for = Event Name then I have no any such information in the eventargs or = anyother way.... Can someone help/guide me to get the event name? Is it possible? if yes then how? If no, then any work around? Thanks in Advance Regards,
Dear,
The Microsoft Event handling framework allows me to do this what you suggest but some time, its possible to have such requirement so its not the matter of sense but its my need so if you can suggest me the woraround for my prolme then it will be helpful to me. [quoted text, click to view] "Herfried K. Wagner [MVP]" <hirf-spam-me-here@gmx.at> wrote in message news:%23NKhX%23P9FHA.1276@TK2MSFTNGP09.phx.gbl... > "Mahesh Devjibhai Dhola [MVP]" <dholamahesh@hotmail.com> schrieb: > I have added few of the events in some control, example code is: > btnControl.GotFocus +=new EventHandler(EventHandlingMethod); > btnControl.Click +=new EventHandler(EventHandlingMethod); > lblControl.Click +=new EventHandler(EventHandlingMethod); > > private void EventHandlingMethod(object sender, EventArgs e) > { > ....... > } > > btnControl = Button object, lblControl = Lable object > > Now the problem is: I am adding the same event handler method in all events > for btnControl and lblControl too. > > now in EventHandlingMethod method, i can find which control is using sender > but now if i want to put some switch cases in the method for Event Name then > I have no any such information in the eventargs or anyother way.... > ======= > > I am curious which sense handling different events of different controls in > the same event handler would make. Instead, add separate event handlers for > all event types, not just delegate types. This means separate handlers for > controls' 'Click' and 'GotFocus' events. > > -- > M S Herfried K. Wagner > M V P <URL:http://dotnet.mvps.org/> > V B <URL:http://classicvb.org/petition/> >
Dear,
I am creating my own framework and its not centric to Buttton or some control only. It will be applicable to all the events of all the controls. So i need one common place which will be a common event handler method for all and from that method my framework will work ahead by checking the sender control and event name and i am doing lot other things at event time and i will need more info than just sender and eventargs so i need to have such method and switch case for event names. For the same type of situation, java allows to have event name but i am wondering why Microsoft has not such a simple provision in EventArgs?? [quoted text, click to view] "Andrew Robinson" <nemoby@nospam.nospam> wrote in message news:Oi$UnCR9FHA.3660@TK2MSFTNGP09.phx.gbl... > Mahesh , > > I agree with what Herfried and Marina have written with regards to different > controls of different types. > > The one place where I do find it useful to use a single event handler for > multiple controls is with Button Controls. Take a look at the Button Command > event. You can pass different CommandName and CommandArgument strings for > each button while using the same Button Command event handler. > > This works with traditional Button controls as well as Link Buttons and > Image Buttons. > > -- > > Andrew Robinson > www.binaryocean.com > www.bellinghamdotnet.org > > > "Mahesh Devjibhai Dhola [MVP]" <dholamahesh@hotmail.com> wrote in message > news:uL$KN7P9FHA.2832@TK2MSFTNGP14.phx.gbl... > Hi, > I have added few of the events in some control, example code is: > btnControl.GotFocus +=new EventHandler(EventHandlingMethod); > btnControl.Click +=new EventHandler(EventHandlingMethod); > lblControl.Click +=new EventHandler(EventHandlingMethod); > private void EventHandlingMethod(object sender, EventArgs e) > { > ....... > } > btnControl = Button object, lblControl = Lable object > Now the problem is: I am adding the same event handler method in all events > for btnControl and lblControl too. > now in EventHandlingMethod method, i can find which control is using sender > but now if i want to put some switch cases in the method for Event Name then > I have no any such information in the eventargs or anyother way.... > Can someone help/guide me to get the event name? > Is it possible? if yes then how? If no, then any work around? > Thanks in Advance > Regards, > Mahesh Devjibhai Dhola > >
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