There are several KeyPress method in my code. All are working except the one due to no reference. I have checked the project for naming mistake. But there is no any mistake. How can I make reference for this method.
btnback_KeyPress is not working.
Looks like you just don't have the event hooked up. Go into the designer, select the btnback button, then in the Events tab of the Properties window, find the KeyPress event and subscribe the btnback_KeyPress method to it as a handler.
You need to wire the event to the button.
You can do so by selecting your button in the [Design] view and then selecting the Events tab (circled in red) from the properties view.
At KeyPress, enter your event name.
It looks like you're missing a line of code in the Form1.Designer (supposedly it's Form1). Look it up and add
this.btnback.KeyPress += new System.EventHandler(this.btnback_KeyPress);
Related
I have a Button (button1) , How can I copy it's Click property (I mean button1.Click) to another Button (button2), Something like:
button2.Click=button1.Click;
You cannot do this. Events only allow you to add or remove handlers, you cannot get a list of all of the handlers that they have. It is a function that is intentionally removed from you.
You could keep track of the handlers you assign to a particular button yourself, independently, and then add those handlers to another button, to accomplish this effect.
When I try to create an event handler eg. button click in c#, if I write the code manually in code behind class, the event handler won't be called; Whereas if I double click the button on the form and the VS auto generates the event, it will work perfectly. What is the reason behind this behavior?
There is a Form.Designer.cs file that hooks up the events for each individual form (each form has it's own designer file).
Open that and you'll find lines like:
button1.Click += button1_Click;
..etc.
As below:
Your file isnt able to know that the event handler is to be linked to the function you have created.
If you want to link manually, click on the button once, and in the top section of the properties window, you'll see a lightning symbol(events). Click on that, and scroll down to the click event, and over there, add your function.
I have written a custom control in C# (inherited from Forms.Control) and it seems to working fine, but if you press the button fast enough a problem occurs: only every other click will call the click event handler. This doesn't happen if you don't press it fast (less than once a second). The mouseUp and mouseDown handlers always get called no matter how fast you click the button.
Of course doesn't happen with the canned winform button.
I cannot use the canned button because I'm writing an application for the .net compact framework, so I need a custom control in order to make the UI more presentable. Also, I tested out my code on the full version of the .net framework, and I still have the same problem.
Any help would be greatly appreciated. Thank you!
If you are clicking rapidly enough, you are getting into DoubleClick territory.
According to above MSDN Page the order of events are:
The following series of events is raised by the control when such a user action takes place:
MouseDown event.
Click event.
MouseClick event.
MouseUp event.
MouseDown event.
DoubleClick event.
MouseDoubleClick event.
MouseUp event
If you will notice there is only one Click event per DoubleClick
For a way to disable it try looking at this MSDN Page discussing ControlStyles.
From above link:
StandardClick -- If true, the control implements the standard Click behavior.
StandardDoubleClick -- If true, the control implements the standard DoubleClick behavior. This style is ignored if the StandardClick bit is not set to true.
So try this in your controls constructor or load event:
this.SetStyle(ControlStyles.StandardClick, true );
this.SetStyle(ControlStyles.StandardDoubleClick, false);
Since SetStyle does not appear to be in the Compact Framework you could add a DoublClick Event and have it trigger the Click event Programmically like this.
YourClickEvent(sender, new MouseEventArgs(System.Windows.Forms.MouseButtons.Left,1,0,0,0));
When you click your control fast enough, it calls double click rather than click.
So, you should do something like this in your click function:
{
control.Enabled = false;
......
control.Enabled = true;
}
which event to use to get the menu strip item clicked?
I've tried the menuStrip_ItemClicked event of the menuStrip; but it fires only on the top menus only ( like "File", "Edit", "Windows").
I want to catch the sub menu items clicked event.
Thanks.
If you are talking about WindowsForms and use VisualStudio:
Go to design of your menu, rigth click on menu item you want, select properties, in property grid select events tab, select Click or MenuClick (don't remember precisely) event and double click on it.
Done
I think you should hook to click event of each ToolStripMenuItem. It can be the done with the same event handler if you prefer to have logic for it in one function.
Every subitem has its own event for clicking. In the winforms designer, you can just double click on the correct item you want to let happen. It will create a saveButton_clicked event or whatever event you would like and you can specify the information for that specific action in the method.
You can even let the shortcut commands work like CTRL+S when assigning them in the designer of visual studio.
I am writing an app where the user should be able to alter the action of a button.
The user should right-click a button, and choose an option from a pop-up context menu. Once the choice has been made the button will perform a different action when the user uses a normal click.
I've already gotten the "Click" event working for a normal button click, however the "MouseClick" event handler isn't working correctly.
The "MouseClick" event gets activated on regular left-clicks, but never get's called for right-click.
Is there some default event handling being performed that is ignoring that right-click?
I'm sorry to say that this would be a serious UI blooper. Perhaps it would make more sense to add a small combobox next to the button.
Perhaps something like this?
http://www.codeproject.com/KB/buttons/SplitButton.aspx
If you want to display a context menu with actions to choose from it should be enough to assign a ContextMenuStrip to the ContextMenuStrip property. There is usually no need to manually handle the mouse events for that.
surely it would be better to implement it on the MouseDown event rather than the MouseUp event. i dont understand how this is much different from MouseClick event
edit: Just tried this and it works a treat :)
In Button (and certain other controls), the MouseClick event is only fired for the left button. Refer to MSDN.
If you want to know about the right button, respond to the MouseUp event--though as other posters have pointed out, this isn't a great UI idiom.
Use the Mouse UP event... test that Button.X and Button.Y are within the size of the button otherwise you have moved the mouse away from the button.
Terry G