如何使文本框只允许整数值? [英] how to make textbox who only allow integer value?

问题描述

我想在我的wpf应用程序中创建一个仅接受整数值的文本框.如果有人在[a-z]之间输入字符，则文本框将拒绝它.因此它将不会显示在文本框中

i want to make a textbox in my wpf application which will accept only integer values. if someone types characters between [a-z], the textbox will reject it. Thus it will not be displayed in the textbox

推荐答案

您可以处理PreviewTextInput事件:

You can handle the PreviewTextInput event:

private void TextBox_PreviewTextInput(object sender, TextCompositionEventArgs e)
{
  // Filter out non-digit text input
  foreach (char c in e.Text) 
    if (!Char.IsDigit(c)) 
    {
      e.Handled = true;
      break;
    }
}

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