I have two textboxes with textchanged events. When I enter characters in first textbox and press enter, the textbox1_textchanged event is fired. Then I enter some characters in the second textbox and press enter, the textbox2_textchanged event fires as well. However, when I move my cursor in first text box without changing any characters and pressed enter, the events won't fire for both textboxes.
I want the respective textbox events to fire without changing any characters in textboxes.
If I press enter with some characters in textbox1/textbox2 its txt_changed events have to fire.
I have tried, but if I enter characters in textbox2 first the textbox1_textchanged get fired.
Any help?
Since you haven't tagged with a webforms/mvc tag I'm going to go ahead and assume this is a WinForms question, in which case look at:
http://msdn.microsoft.com/en-us/library/system.windows.forms.textbox%28v=VS.100%29.aspx
See the "Events" section for a list of all the events a textbox supports.
My guess is you'll want to focus on Enter and Leave events, as well as your text_changed events that you already have.
I'm also assuming (I'm assuming a lot since you've specified little) that you have the latest version of .NET at hand and not something from the dark ages, so I've pointed you at the .NET 4.0 reference.
Related
I just want to add simple thing, wherever i click on TextBox I want to delete text that is inside. The thing is I DON'T have in list of events, event called Click.. Is this even possible? Or just I need to install some add on. Buttons are fine, they have Click event.
MouseButtonLeftUp would work if you only are concerned with mouse clicks. With that said, what if someone tabs into the box or focus is entered by other means?
At that point you may want to look at the GotFocus event. Any time the TextBox receives focus, you can handle the event.
TextBox has events called MouseLeftButtonUp and MouseLeftButtonDown, you can use them.
Throughout the app I need to use ENTER to advance to next control (same as Tab), and I do that by using EventManager.RegisterClassHandler, KeyDownEvent for textboxes in Application_Startup. But for one particular textbox (which is the input for a barcode scanner), I want to keep the focus to allow multiple scannings. So it has to receive a number, process it, then clear the box and keep the focus for the next read. Barcode reader is automatically sending an ENTER at the end of a read. Textbox must still be able to lose focus by user's choice (like mouse clicking in another box)
Explicitly handle the PreviewKeyDown on that box and set Handled to true on the event arguments. It executes before any KeyDown handlers.
I need to update the formatting of a rich text box after any change is made to the text (for example when the user presses a key and inserts a character). How can I do this?
KeyDown occurs too early and would not account for holding a key down anyway, KeyUp occurs too late, and neither would account for a cut or paste with the mouse.
It would be even better to receive to get this event before the change even appears on screen.
Use the TextChanged event to know whenever the text has changed
I have a textbox with a paragraph of information. There are certain words in the paragraph that i want the user to be able to click on, and when clicked, a different textbox is populated with more information.
I know that you can have the event for the whole textbox, but that isn't want i want. I only want to call that event when certain words within the box are clicked.
Sorry, but I don't think you're going to be able to do it like that. The text in a textbox is a singular value type string, there are no objects for "words" or "letters" which would be necessary to raise such an event.
Your best bet will be to subscribe to the textbox keypressed event and parse the string each time a new letter is added. It may not be beautiful, but it's not a huge overhead.
I'm trying to make some sort of intellisense look a like for an editor I'm working on.
When the user types in the richtextbox and the letters match a word a listview will pop-up and the matched word will be selected.
the problem is the focus is still on the richtextbox so all the key presses will go to that control, which is good, except that if there's a match I need the Return and arrow keys to trigger in the listview and not in the richtextbox.
is there some way of using the keypress event of the richtextbox to send those keys to the listview?
thanks
Would it not be easier to use scintilla, the .NET wrapper can be found here, which would do all of what you are looking for?
Edit: It looks like someone has done this, in what you are trying to achieve, an article about it is on CodeProject.
I think it is good that the focus remains on the richtextbox.
How about subclassing that listview to add methods like void SelectNext(), void SelectPrevious(), and string PerformCompletion(). You handle mouse events only for the richtextbox. If the textbox is visible, and the user presses a down arrow, call SelectNext() and swallow the keypress, but if it is not visible, just navigate down to the next line (let the keypress through).
If the listview is visible and the user presses Enter or Tab or . or whatever, call PerformCompletion() to get the selected string, then add whatever characters haven't already been entered.