UWP C# TextBox with numbers and "space" only.

Question

How can I create a TextBox that can only contain numbers and spacebar?

Answer 1

Hi @VoyTec ,

This question is similar to your previous question, you just need to modify the regular expression ^[\\s\\d\\s]*$.

Page.xaml

<TextBox  TextChanged="TextBox_TextChanged" />  

Page.xaml.cs

private void TextBox_TextChanged(object sender, TextChangedEventArgs e)  
{  
    var textbox = (TextBox)sender;  
    if (!Regex.IsMatch(textbox.Text, "^[\\s\\d\\s]*$") && textbox.Text != "")  
    {  
        int txtPos = textbox.SelectionStart - 1;  
        textbox.Text = textbox.Text.Remove(txtPos, 1);  
        textbox.SelectionStart = txtPos;  
    }       
}  

Thank you
Junjie