谁帮我看看这个正则式

Question

protected static Regex RCountry = new Regex(@"^[A-Za-z]{2}$");
if (!RCountry.IsMatch(Txt_DeliverContactor.Text))
                    {
                        Page.ClientScript.RegisterStartupScript(this.GetType(), "", "<script>alert('只能输入字母！')</script>");
                    }
就是输入字母也会提示~正则式用验证控件是可以通过的
该怎么改

Answer 1

protected static Regex RCountry = new Regex(@"[^A-Za-z]");
if (RCountry.IsMatch(Txt_DeliverContactor.Text))
                    {
                        Page.ClientScript.RegisterStartupScript(this.GetType(), "", "<script>alert('只能输入字母！')</script>");
                    }

Answer 2

protected static Regex RCountry = new Regex(@"[^a-z]");
if (RCountry.IsMatch(Txt_DeliverContactor.Text.ToLower()))
                    {
                        Page.ClientScript.RegisterStartupScript(this.GetType(), "", "<script>alert('只能输入字母！')</script>");
                    }

Answer 3

protected static Regex RCountry = new Regex(@"[^a-z]{2}$");
if (RCountry.IsMatch(Txt_DeliverContactor.Text.ToLower()))
  {}

Answer 4

            string str = "12";
            Regex reg = new Regex(@"(?i)^[a-z]{2}$");
            if (reg.IsMatch(str))
                Response.Write("true");
            else
                Response.Write("false");

Answer 5

看不出什么问题啊
要不把 Text 也输出看一下是不是传输错误
或者用 Match 方法看它到底匹配出什么了

Answer 6

protected static Regex RCountry = new Regex(@"^[A-Za-z]{2}$");
if (RCountry.IsMatch(Txt_DeliverContactor.Text))
                    {
                        Page.ClientScript.RegisterStartupScript(this.GetType(), "", "<script>alert('只能输入字母！')</script>");
                    }