使用Regex提取值 - C＃

Question

I'm not much familiar with Regular expressions. I've a string from which I need to extract specific values using regex. Here is the string

CN=ReportingGroup {b4f3d644-9361-461e-b604-709fa31f2b9e},OU=DOM USERS,DC=domain,DC=com

I want to get the values of CN and OU namely "ReportingGroup {b4f3d644-9361-461e-b604-709fa31f2b9e}" and "DOM USERS "

from the above string. How can i construct the regex pattern for that?

Answer 1

You don't need a RegEx for this.

If you split the string using , and then each resulting string with = , you can look through the keys in order to extract the value for the CN and the OU keys.

string cn;
string ou;
foreach(string adPortion in myString.Split(new Char [] {','}))
{
   string[] kvp = adPortion.Split(new Char [] {'='})

   if(kvp[0] == "CN")
      cn = kvp[1];

   if(kvp[0] == "OU")
      ou = kvp[1];
}

This assumes that CN and OU only appear once in the string.

Answer 2

请执行下列操作：

new Regex("CN=(?<CN>[^,]*),OU=(?<OU>[^,]*)").Match(str).Groups["CN"].Value;

Answer 3

It looks like your string is pretty well structured. Consider using regular string functions like IndexOf() and Substring() . Regex are harder to read and understand.

Answer 4

If you absolutely want to use Regex, the following code will iterate though all KEY=VALUE pairs:

        foreach (Match m in
            Regex.Matches(inputString, @"[,]*([^=]+)=([^,]*)"))
        {
            string key = m.Groups[1].Value;
            string value = m.Groups[2].Value;
        }