如何接受一个WPF文本框仅整数 [英] How to accept only integers in a WPF textbox

问题描述

你知道如何限制在文本框用户输入，这个文本框只接受整？顺便说一句，我开发的Windows 8，我试过我从SO和谷歌搜索，但它不工作，

Do you know how to restrict user input in textbox, this textbox only accepts integer? By the way I'm developing for Windows 8. I've tried what I searched from SO and from Google but it's not working,

推荐答案

如果你不想下载WPF工具包（其中有两个IntegerUpDown控制或MaskedTextBox中）。您可以自己实现它在这个文章看到

If you don't want to download the wpf toolkit (which has both the IntegerUpDown control or a MaskedTextBox). You can implement it yourself as seen in this article

下面是你放什么在你的窗口：

Here's what you would put in your window:

<Window x:Class="MaskedTextBoxInWPF.MainWindow" 
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" 
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" 
    Title="Masked Text Box In WPF" Height="350" Width="525"> 
  <Grid> 
    <TextBlock Height="23" HorizontalAlignment="Left" Margin="98,80,0,0" Name="textBlock1" Text="Enter Value:" VerticalAlignment="Top" /> 
    <TextBox Height="23" HorizontalAlignment="Left" Margin="184,80,0,0" Name="textBoxValue" PreviewTextInput="textBoxValue_PreviewTextInput" DataObject.Pasting="textBoxValue_Pasting" VerticalAlignment="Top" Width="120" /> 
  </Grid> 
</Window> 

，然后实现在你的代码隐藏在C＃中：

And then implement the C# in your codebehind:

public partial class MainWindow : Window 
{ 
  public MainWindow() 
  { 
    InitializeComponent(); 
  } 

  private void textBoxValue_PreviewTextInput(object sender, TextCompositionEventArgs e) 
  { 
    e.Handled = !TextBoxTextAllowed(e.Text); 
  } 

  private void textBoxValue_Pasting(object sender, DataObjectPastingEventArgs e) 
  { 
    if (e.DataObject.GetDataPresent(typeof(String))) 
    { 
      String Text1 = (String)e.DataObject.GetData(typeof(String)); 
      if (!TextBoxTextAllowed(Text1)) e.CancelCommand(); 
    } 
      else e.CancelCommand(); 
    } 

    private Boolean TextBoxTextAllowed(String Text2) 
    { 
        return Array.TrueForAll<Char>(Text2.ToCharArray(), 
            delegate(Char c) { return Char.IsDigit(c) || Char.IsControl(c); }); 
    } 
} 

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