A textbox control in C# does not automatically discover the copy, cut, and paste events. Although with some basic knowledge of C# applications, developers can implement those events. paste text
A C# event is a method/function that is brought up (or called) every time a value changes. For example, one common textbox event is the TextChanged event. The TextChanged event is brought up when, as you might imagine, the text within the textbox changes.
The. NET Framework allows builders to write and call their own events. Therefore we might be ahead and use delegates to establish our own CopiedText, CutText, and PastedText events. A good question to ask is the reason why do we bother with detected copies, cuts, and pastes with events in the first place. Right now there are two reasons.
(1) The first reason is code readability. Events generally speaking make code better to understand, since a programmer looking at a block of code inside an event immediately has a sense of when the code will be called. Hence a paste event, for example, is a clean way to tie a specific response to an user pasting text in a textbox.
(2) The second reason would it be reduces the risk for redundancy. There is many different ways to sauce information in a textbox. The two clear ways are to right-click a textbox and select Substance from the context menu and use the Ctrl+V keyboard shortcut (the same is true of copy and cut). By encapsulating these under a conference, we can deal with all those cases automatically.
So let’s say we certainly have agreed that detecting duplicate, cut, and paste as events is a good idea. We go on and specify our events using. NET delegates. Now what is an abbreviation for, is when do we enhance the events?
One clean approach is to create a textbox user control. In this user control, we can override the WndProc function, which is in charge of processing all the windows messages passed to the control. By overriding the function, we can preview messages before they get processed. In this case, when we run across the WM_CUT, WM_COPY, and WM_PASTE messages, we will react by dialling our events.
In this way, it does not matter how exactly the person pasted the text (with the mouse or the keyboard) since either action would send the WM_PASTE message.