Can anyone tell me how to raise click event of button control (or for that matter for any event).
Platform: .net 2.0/3.0/3.5
Language: c#
Domain: Windows Application, WinForms, etc.
You can use the Button.PerformClick method.
Maybe the solution is much more simple:
Maybe you don't really want your code "to click the button".
Do you just want to run the code which is behind the button from another place in the form?
If yes, put the code into a separate method (like "DoActionXXX") and call the method from the button and from everywhere else where you need it.
You can also look into Windows Accessibility or some UI automation framework that allows you to programmatically cause UI controls to respond to user gestures. If a control does not offer a way for its events to be programmatically triggered like PerformClick, you can derive from that control and expose a public method like PerformnXXX that when called internally invokes the event handlers subscribed to a particular event.
button click and to new my manually window
ex.. dital.cs open the may window
I dont think sending click events is the best way from a design point of you just make your event handler call another function. That way you always have access to that function.
so ..
void myEventHandler(ObjectwhoSentTheMessage O, Event e)
{
MyOtherFunction();
//consume the event after if you wish etc
}
Related
Is it possible in c# to dispatch own events to controls?
I mean, like you can do in java:
MouseEvent leftClick = new MouseEvent(image, MouseEvent.MOUSE_PRESSED,
0, 0, 100, 100, 1, false, MouseEvent.BUTTON1);
image.dispatchEvent(leftClick);
Events in C# work a little differently. Instead of dispatching an event to the object, you subscribe to an event the object has available and provide a delegate. See Events (C# vs. Java) for reference. However, if you want to run the code attached to an event, you can call the delegate directly, but I think most people would consider this bad form. It may be better to have a method which performs the action and call it from both the delegate and wherever you are wanting to simulate the click event from.
SomeControl.LeftMouseButtonDown += new LeftMouseButtonDown(SomeControl_LeftMouseButtonDown);
protected void SomeControl_LeftMouseButtonDown(object sender, EventArgs e) //Might be typed EventArgs instead of generic.
{
//Run some code or call some method.
}
Preferably, you would use the Click event instead of the LeftMouseButtonDown as the Click event is thrown on LeftMouseButtonDown and LeftMouseButtonUp when they occur consecutively.
Are you working with a control that does not have a LeftMouseButtonDown or Click event? If so, you will need to write your own control that inherits from that control and write your own event.
Also, it would help if you provided some details over which .NET technology you are using (WPF, WinForms, ASP.NET, Silverlight, etc) as each has a different control set. It may also be helpful to know which control you are using from that technology.
Hope this helps though!
I wrote the MouseController for NUnitForms. Its designed to work with Windows Forms and simulates the events by placing the events into the Windows event queue.
You can view the source at http://nunitforms.svn.sourceforge.net/viewvc/nunitforms/trunk/nunitforms/source/NUnitForms/MouseController.cs?revision=69&view=markup
I want to give the user the option to use a tutorial, the first time he uses the program. I tried adding it in the Form.Load event, but the forms shows up after the Messageboxes have popped up.
That's why I would like to know, are there any events fired right after loading a form?
If not, is there a way to perform actions right after loading?
You should try the shown event, which fires after the form is shown for the first time.
Load happens before the form is shown.
You could try using the Shown event but that might be a bit early too based on what you are doing but it does occur after the Load.
If you have any controls on the page you could trigger it off the controls GotFocus event. Just make sure to put in checks to only do it once if using the GotFocus method.
MSDN Form.Shown
MSDN Control.GotFocus
MSDN Reference to order of events
System.Windows.Forms.Control.HandleCreated
System.Windows.Forms.Control.BindingContextChanged
System.Windows.Forms.Form.Load
System.Windows.Forms.Control.VisibleChanged
System.Windows.Forms.Form.Activated
System.Windows.Forms.Form.Shown
The Shown event should do this for you.
C# WinApps: Is there any way that I can check if something like CTRL-V is pressed but not in the KeyDown,PreviewKeyDown,KeyPress,etc ... events? those are being eaten by some other parts in my App and it is so hard to find them so I thought Ok for this contorl lets check the pressed keys in its GotFocus event! Is it possible?
Not sure what you mean by the events being "eaten". Events can call multiple handlers. So even if the event is already being subscribed to by one handler, you can subscribe to it with another handler and it should work just fine.
Another option would be to subclass the control you are using and use the subclass instead. Then you can override the On{event} methods and do anything you want with those (be sure to call the base method as well to ensure the behavior of the original class is still in place).
HTH
I'm creating a base class for a button that inherits from Control as opposed to ButtonBase.
I'm using reflector to look at ButtonBase to make sure I don't overlook anything important and I'm puzzled with the contents of the WndProc method.
There's checks in there for things like button up, click and capture changed, which as far as I can tell are all handled within the relevent 'On' methods of the class.
Does anyone know why they are in there?
It is a wrapper for the native Windows button control as well. In a nutshell:
0x00f5 = BM_CLICK: run OnClick()
0x2111 = BN_CLICKED notification : run OnClick()
a bunch of workarounds to deal with OwnerDraw.
You don't have to worry about any of this since you don't wrap a native button and don't need owner draw. Do make sure you implement IButtonControl so your button behaves properly when Enter and Escape is pressed and it is selected as the form's Accept/CancelButton. Not strictly necessary, but it is automatic when you inherit from ButtonBase instead of Control.
i want to FIre the button Click event When My Window is Loaded..
How Can i Achieve it in Wpf?
Create a single function with the shared behavior in your window, then call that function from both your loaded handler and your click handler.
As per this blog post in WinForms this was really easy by just calling PerformClick(), but in WPF you can do it with Automation, however as a commenter mentioned it's really easy if you have access to the button to just use RaiseEvent.
someButton.RaiseEvent(new RoutedEventArgs(Button.ClickEvent));
But as previously answered, if you only have a single handler that needs to be notified, then simply call that handler method directly.
You could use Automation to do it aswell - I've seen this suggested some places as the more flexible/robust method to use, but it seems a bit heavy weight to me compared to just calling the method you already have directly.
in you page_loaded event handler method, make a call to the click event like this:
_buttonName_click(sender, new RoutedEventArgs())
Trgger this event on Button whic u wanted to click
button.performclick();