WPF文本框只允许输入数字

http://www.oschina.net/code/snippet_565270_10848

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XAML代码

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03	< TextBox Height="23" HorizontalAlignment="Left" Margin="100,5,0,0" Name="textBox1"VerticalAlignment="Top" Width="120"

04	DataObject.Pasting="textBox1_Pasting"PreviewKeyDown="textBox1_PreviewKeyDown" InputMethod.IsInputMethodEnabled="False"

05	PreviewTextInput="textBox1_PreviewTextInput"

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/ >

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cs代码

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//检测粘贴

17	private void textBox1_Pasting(object sender, DataObjectPastingEventArgs e)

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{

19	if (e.DataObject.GetDataPresent(typeof(String)))

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{

21	String text = (String)e.DataObject.GetData(typeof(String));

22	if (!isNumberic(text))

23	{ e.CancelCommand(); }

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}

25	else { e.CancelCommand(); }

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}

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30	private void textBox1_PreviewKeyDown(object sender, KeyEventArgs e)

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{

32	if (e.Key == Key.Space)

33	e.Handled = true;

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}

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38	private void textBox1_PreviewTextInput(object sender, TextCompositionEventArgs e)

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{

40	if (!isNumberic(e.Text))

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{

42	e.Handled = true;

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}

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else

45	e.Handled = false;

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}

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49	//isDigit是否是数字

50	public static bool isNumberic(string _string)

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{

52	if (string.IsNullOrEmpty(_string))

53	return false;

54	foreach (char c in _string)

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{

56	if (!char.IsDigit(c))

57	//if(c<'0' c="">'9')//最好的方法,在下面测试数据中再加一个0，然后这种方法效率会搞10毫秒左右

58	return false;

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}

60	return true;

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}