WPF限制文本框只能输入数字

在一个程序中有时候文本框需要添加限制，比如需要限制文本框只能输入数字，限制文本框只能输入数字和字母等等。先来介绍文本框只能输入数字

<TextBox PreviewTextInput="UserName_PreviewTextInput" //限制输入特殊字符

PreviewKeyDown="Space_PreviewKeyDown" //限制输入空格

InputMethod.IsInputMethodEnabled="False" >

<mandBindings>//禁止复制粘贴

<CommandBinding Command="ApplicationCommands.Paste" CanExecute="CommandBinding_CanExecute"/>

<CommandBinding Command="ApplicationCommands.Copy" CanExecute="CommandBinding_CanExecute"/>

<CommandBinding Command="ApplicationCommands.Cut" CanExecute="CommandBinding_CanExecute"/>

</mandBindings>

</TextBox>

需要类

public class TextRestrict{/// <summary>/// 禁止文本框复制粘贴/// </summary>/// <param name="sender"></param>/// <param name="e"></param>public void Prohibit(object sender, CanExecuteRoutedEventArgs e){e.CanExecute = false;e.Handled = true;}/// <summary>/// 鼠标按下事件/// </summary>/// <param name="sender"></param>/// <param name="e"></param>public void ButtonDown(PasswordBox pwd, TextBox txt){txt.Text = pwd.Password;txt.IsEnabled = true;txt.Visibility = Visibility.Visible;pwd.IsEnabled = false;pwd.Visibility = Visibility.Hidden;}#endregionpublic void SpaceKeyDown(object sender, KeyEventArgs e){if (e.Key == Key.Space){e.Handled = true;}}}}

在根据textbox中的所写的属性写方法

限制输入空格

TextRestrict text = new TextRestrict();

private void Space_PreviewKeyDown(object sender, KeyEventArgs e)

{

text.SpaceKeyDown(sender, e);

}

限制特殊字符

private void UserName_PreviewTextInput(object sender, TextCompositionEventArgs e)

{

Astrict astrict = new Astrict();

astrict.Number(sender, e);

}

禁止粘贴复制

private void CommandBinding_CanExecute(object sender, CanExecuteRoutedEventArgs e)

{

text.Prohibit(sender, e);

}