Question

编写一个C#程序，判断输入的一串字符是否符合电话号码的格式

Answer 1

用正则表达式，Regex类
((\d{11})|^((\d{7,8})|(\d{4}|\d{3})-(\d{7,8})|(\d{4}|\d{3})-(\d{7,8})-(\d{4}|\d{3}|\d{2}|\d{1})|(\d{7,8})-(\d{4}|\d{3}|\d{2}|\d{1}))$)

追问

看不懂额，要用C#语言编程序

追答

string Num = @"((\d{11})|^((\d{7,8})|(\d{4}|\d{3})-(\d{7,8})|(\d{4}|\d{3})-(\d{7,8})-(\d{4}|\d{3}|\d{2}|\d{1})|(\d{7,8})-(\d{4}|\d{3}|\d{2}|\d{1}))$) ";

if (textBox1.text.Trim() != null && textBox1.text.Trim() != "")

{

if (Regex.IsMatch(textBox1.text,Num)) //通过Regex.IsMatch方法判断txtName中的值是否与正则表达式匹配
{
Response.Write(textBox1.text+ "：是电话号码");
}
else

{

Response.Write(textBox1.text.+ "：不是号码");

}

}

Answer 2

用正则表达式