https://www.heckjj.com/index.php zh-cn https://www.heckjj.com/regex-to-achieve-can-only-eng-and-num/ Heck <@hecks.tk> Sun, 24 Oct 2010 00:36:11 +0000 https://www.heckjj.com/regex-to-achieve-can-only-eng-and-num/ 首先要引入using System.Text.RegularExpressions;
string pattern = @"^[a-zA-Z0-9]+$";//正则式子
string param1 = null;
Match m = Regex.Match(this.textBox1.Text, pattern);   // 匹配正则表达式，把this.textBox1.Text跟pattern正则对比

if (!m.Success)   // 判断输入的是不是英文和数字，不是进入
{
    param1 = this.textBox1.Text;//将现在textBox的值保存下来
    // 将光标定位到文本框的最后
    this.textBox1.SelectionStart = this.textBox1.Text.Length;
}
else   //输入的是英文和数字
{
    param1 = this.textBox1.Text;   // 将现在textBox的值保存下来
}
Tags - 正则 , 英文 , 数字 ]]> https://www.heckjj.com/regex-to-achieve-can-only-eng-and-num/#blogcomment <user@domain.com> Thu, 01 Jan 1970 00:00:00 +0000 https://www.heckjj.com/regex-to-achieve-can-only-eng-and-num/#blogcomment