Win Form中限制TextBox只能输入数字

首先引用

using System.Text.RegularExpressions;

给TextBox添加KeyPress事件，代码如下：

private void textBox1_KeyPress(object sender, KeyPressEventArgs e)
        {
            if ((Convert.ToInt32(e.KeyChar) == 8))
            {
                e.Handled = false;
            }
            else
            {
                Regex numRegex = new Regex(@"^(-?[0-9]*[.]*[0-9]*)$");
                Match Result = numRegex.Match(Convert.ToString(e.KeyChar));
                if (Result.Success)
                {
                    e.Handled = false;
                }
                else
                {
                    e.Handled = true;
                }
            }
        }