Windows Phone 7 extended Textbox Control is a digital input text box

Some information is input, such as phone numbers and zip codes. However, the control in Windows Phone 7 does not only allow the input of numbers, to implement such a control, you can only manually extend the Textbox Control.

To expand a widget:

1. Define a class. This class must inherit the class of the control you want to extend.

For example

Public class numerictextbox: textbox

2. Add a spatial reference to the class of the extended control on the page.

For example

Xmlns: My = "CLR-namespace: wpnumerictextbox. Controls"

3. Call controls

For example

<My: numerictextbox X: Name = "numtbx"/>

The following is an example of the numeric input text box control:

Controls

Numerictextbox. CS

 Using  System;
  Using  System. Windows. controls;
  Using System. Windows. input;

  Namespace  Wpnumerictextbox. Controls
{
  Public     Class  Numerictextbox: textbox
{
  //  Return key and number key  
    Private     Readonly  Key [] numeric  =    New  Key [] {key. Back, key. numpad0, key. numpad1, key. numpad2, key. numpad3, key. numpad4,
Key. numpad5, key. numpad6, key. numpad7, key. numpad8, key. numpad9 };

  Public  Numerictextbox ()
{
  //  Set text to phone number text input mode  
    This  . Inputscope  =    New  Inputscope ();
  This  . Inputscope. Names. Add (  New  Inputscopename () {namevalue  =  Inputscopenamevalue. telephonenumber });
}

  Protected     Override     Void  Onkeydown (keyeventargs E)
{  // Set E. Handled = true if it is a numeric or return key, indicating that the event has been processed.  
    If  (Array. indexof (numeric, E. Key)  =     -  1  )
{
E. Handled  =     True  ;
}
  Base . Onkeydown (E );  //  Important, if not called the back button is not handled  
  }
}

}