My custom Control displays a TextBox when a key is pressed (basically to allow for numeric input). It's easy enough to show the TextBox from inside the KeyDown event on the main control, but how do I pump the keypress into the textbox?
Why dont you keep a buffer ( a variable) to store the value of KeyPress and after the TextBox is Enabled, update the value?
You can use the KeyValue of the KeyEventArgs parameter (sent to the method handling the keydown event of your user control).
Using that you can send the first key to the textbox and then move the focus to the textbox like suggested before.
Hope I understood you well.
Related
Is there any way to catch the Up/Down arrow keys in a WPF TextBox (System.Windows.Controls.Textbox) and allow them to alter the text? I've read about overiding the ProcessCmdKey method for a Windows Forms TextBox (System.Windows.Forms.TextBox), and it worked fine, but that TextBox is not nearly as flexible as the WPF one. Is there a similar method to accomplish this without having to use the old Windows Forms TextBox?
For my example, I have a TextBox that has a numeric text-mask. I want to be able increase/decrease the numeric value by using the up and down arrow keys.
You could add event handlers to KeyUp and/or KeyDown, if that doesn't get what you need, using PreviewKeyUp and/or PreviewKeyDown should.
I am making an EPOS and I would like continually take input from a textbox but the textbox must only take the value if it is validated and is on a list of variables.
I just need to know what event that would be on the textbox
For validation, KeyPress event is appropriate.
You can control which characters can be entered in the text box.
Here's an example:
How do I make a textbox that only accepts numbers?
You can use the TextChanged event.
In a Silverlight web app that I'm working on, there's a DataGrid with a column that displays as a DatePicker. The DatePicker gives the option to change its value by typing in the box, or by clicking on the calendar button and selecting the date. In the case where text is entered, if the cell loses focus then the entered value is lost and the old value is displayed. If text is entered and then the Enter key is pressed, then the value is kept when the cell loses focus.
Also curious is that other editable cells in this grid already keep their information without needing to first hit enter.
Is there a way to have the value kept without having to press the Enter key? There's obviously some sort of built-in event happening when the Enter key is pressed in order for this to work. Maybe I can use the LostFocus event to fire whatever the Enter key is using? What's going on here?
You may want to try using the keydown event and trap all keystroke then flush the data to where this control was bound.
I'm wondering if there is a way to use an event to check a string in a textBox in a windows form before the user clicks on the OK button?
You can use the KeyDown, KeyPress, or KeyUp event.
A full list of events can be found here: http://msdn.microsoft.com/en-us/library/system.windows.forms.textbox_events.aspx
It's all alphabetical, so scroll down to Key....
A better approach is to use the Validating event of the textbox. This way, your validation routine runs when the user attempts to leave the textbox.
Basic question, but I can't figure it out...I have a label with an accelerator key set (e.g. "&Add") and I want to give focus to a textbox when that shortcut, Alt+A, is pressed. What event does this correspond to? I tried the click event but that didn't do anything...
edit: found my own answer - it sets focus to the control that is next in the tab order. so I guess my revised question is, is there a way to catch this so I can have it select all the text in the textbox?
Handle GotFocus event of the TextBox