Control Design Concepts -- 7. OutlookBarTab Component -- 8. OutlookBar Control -- 9. ImageListView Control -- Control Development -- A. Extender Providers. There are no reviews yet. Be the first one to write a review. Books for People with Print Disabilities. Internet Archive Books. To add this functionality into our control, we need to understand how Keyboard events work in the DateTimePicker control.
When a user presses a key, the first event to occur is the KeyDown, followed by KeyUp event when the key is released. The KeyPress is the last event in this sequence and it notifies Windows that a key has been pressed and now needs to be handled.
In our case, we will use the KeyPress event to capture the key that was pressed and check if this key is in our list of keys. If so, we will take some action based on the key that was pressed by the user. WinForms namespace. It exposes two public properties: KeyChar and Handled. KeyChar is a read-only property that returns the character corresponding to the key that was pressed. Handled, on the other hand is a read-write logical property that indicates whether the key was handled or not.
By default, the value of this property is false and it means that the event will be forwarded to Windows for processing and displaying the appropriate character. When this property is set to true from the KeyPress event, it tells Windows that the event has been handled and no further work needs to be done.
Now that we know how the keyboard events work, let us look into creating our custom user control. This section explains a step-by-step process for creating a new user control. If you are already familiar with this process you may skip this section.
Right-click on the solution explorer and select new user control. This opens a working area where the control can be added. Select the DateTimePicker control from the toolbox and add it in the working area. Select the DateTimePicker control, right-click and select Properties.
This will open the properties window. Make sure that the top-left of the DateTimePicker is set to 0 and the height-width of the container design area is set to the height-width of the DateTimePicker control.
Set the DateFormat property of the DatePicker to short date and size the control appropriately. To add code in our DateTimePicker control, click on the icon that displays this see below image in the property window. This will display a list of all the events supported by the DateTimePicker control.
Double-clicking on the KeyPress event opens the source view, where we will add code to handle the KeyPress event. Listing 1 shows our new source code for the KeyPress event, written in C. For Visual Basic. NET developers, there should be no problem at all translatinging this code into VB. NET syntax, as we are working with only. Feedback will be sent to Microsoft: By pressing the submit button, your feedback will be used to improve Microsoft products and services.
Privacy policy. Windows Forms controls are reusable components that encapsulate user interface functionality and are used in client-side Windows-based applications. Not only does Windows Forms provide many ready-to-use controls, it also provides the infrastructure for developing your own controls. You can combine existing controls, extend existing controls, or author your own custom controls. This section provides background information and samples to help you develop Windows Forms controls. Varieties of Custom Controls Describes the different kinds of custom controls you can author with the System.
Forms namespace. Attributes in Windows Forms Controls Describes the attributes you can apply to properties or other members of your custom controls and components.
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