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();
Related
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 dont want to click the button. instead, i just want to run the click event code. how would i do this?
button1_click(null, new EventArgs() );
Option: use PerformClick().
Take a look here: How to: Call a Button's Click Event Programmatically.
The advantage here is that the event behavior will be exactly the same as a real button click (as oposed of calling button1_click directly).
But none of this options is the best IMHO. If you need to call the event handler code, you need a new method! Just refactor the old button1_click into a new, standard method and call it from wherever you want.
From inside or outside the Form where the Button is? Simplest thing is to just call the function:
Button1_Click(Button1, EventArgs.Empty);
Try a keybd_event with p/invoke http://msdn2.microsoft.com/en-us/library/ms646304(VS.85).aspx
I sometimes do that by actually calling the event handler function, that's if I actually implemented it.
Literally call it like:
button1_Click(this, new EventArgs());
I am developing a web application in asp.net and c#, now in a particular aspx page whenever I doubleClick(design view) on a button or on a drop down list, instead of going to
public void btn_click event or DropDown_SelectedIndexChanged event, the cursor points to protected void Page_Load only. Strange!! any remedy?
Not a fix for your VS misbehaving, if it is doing so. But this will help you wire up your events and perhaps notice anomalous event assignments:
Select the control in question, right-click>Properties, switch to the 'events' tab (lightning bolt) and either enter the name of a method or simply double click the empty space to generate an event handler in your codebehind.
This is also where you will see if Page_Load is already, for whatever reason, assigned to the event you are having trouble with.
HTH
May be both your btn_click event and DropDown_SelectedIndexChanged event delegates have Page_Load as the method. Check your events tab for button and dropdown.
this happens to me when I have my project running in debug mode and forget to stop it before editing my code. Long shot, but sometimes the obvious things are the things we overlook :)
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
}