If input is not a number do not handle the key event
<Window x:Class="RoutedEvents.OnlyNumbers"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
Title="Only Numbers" Height="300" Width="300">
<StackPanel Margin="5" PreviewTextInput="pnl_PreviewTextInput" PreviewKeyDown="pnl_PreviewKeyDown">
<TextBox Margin="3" AcceptsTab="False"></TextBox>
<TextBox Margin="3"></TextBox>
<TextBox Margin="3"></TextBox>
</StackPanel>
</Window>
//File:Window.xaml.cs
using System;
using System.Collections.Generic;
using System.Text;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Shapes;
namespace RoutedEvents
{
public partial class OnlyNumbers : System.Windows.Window
{
public OnlyNumbers()
{
InitializeComponent();
}
private void pnl_PreviewTextInput(object sender, TextCompositionEventArgs e)
{
short val;
if (!Int16.TryParse(e.Text, out val))
{
e.Handled = true;
}
}
private void pnl_PreviewKeyDown(object sender, KeyEventArgs e)
{
if (e.Key == Key.Space)
{
e.Handled = true;
}
}
}
}
Related examples in the same category
