2使用.net中的正则表达式提取值

Question

"reportstarttime=10-18-2004:10-50-56 reportid= 12345456 reportendtime=10-18-2004:10-50-56"

How can i extract value of reportid which is 123456

Answer 1

string GetReportId(string data)
{
    var regex = new Regex(" reportid=([0-9]+) ");
    var result = regex.Match(data);
    if (!result.Success) throw new FormatException();
    return result.Groups[1].Value;
}

var result = GetReportId("reportstarttime=10-18-2004:10-50-56 reportid=12345456 reportendtime=10-18-2004:10-50-56");

Answer 2

Is there a pressing need for a regular expression? What's wrong with good ole Split?

var input = "reportstarttime=10-18-2004:10-50-56 reportid=12345456 reportendtime=10-18-2004:10-50-56";
var value = input.Split(' ')[1].Split('=')[1];