如何使文本框仅接受数字和小数? [英] How do you make a text-box only accept numbers and decimals?

问题描述

我想知道如何使文本框仅接受1s，2s，3s，4s，5s，6s，7s，8s，9s，0s和.s.

I''m wondering how to make a text-box only accept 1s, 2s, 3s, 4s, 5s, 6s, 7s, 8s, 9s, 0s, and.s.

推荐答案

private void tbacc_Receipt_nAmount_KeyPress(object sender, KeyPressEventArgs e)
{
    if (!char.IsDigit(e.KeyChar) && e.KeyChar != '.')
    {
        e.Handled = true;
    }

    if (!char.IsControl(e.KeyChar))
    {

        TextBox textbox = (TextBox)sender;

        if (textbox.Text.IndexOf('.') > -1 &&
                 textbox.Text.Substring(textbox.Text.IndexOf('.')).Length >= 3)
        {
            e.Handled = true;
        }
    }
}

您尝试了什么? [

http://www.csharpfriends.com/Forums/ShowPost.aspx?PostID=79881 [ http://www.pcreview.co.uk/forums/textbox-only-numbers-and-decimal-seperator-t3667663.html [ NumericTextBox(C#.NET) [ ^ ]

http://www.csharpfriends.com/Forums/ShowPost.aspx?PostID=79881[^]
http://www.pcreview.co.uk/forums/textbox-only-numbers-and-decimal-seperator-t3667663.html[^]
NumericTextBox (C#.NET)[^]

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