从结构为“key = value”的字符串中解析值

Question

I have a string like this:

SUBJECT=Some text here\r\n
VALUE=19355711\r\n
RCV_VALUE=2851404175\r\n
RESULT=1\r\n
CNCODE=0\r\n
KEY1=1\r\n
KEY2=2

Now I need to get the values of RCV_VALUE and RESULT from this string. The position of these keys in the string may vary. They can also be at the beginning or/and at the end of the string.

Value of RESULT I must get as int , and value of RCV_VALUE I must get as string .

What is the best way to get the values of these keys regardless of their position in the string?

Answer 1

Best bet is a regular expression

var regex=new Regex(@"RCV_VALUE=(?<value>\d+)");
var match=regex.Match(inputString);
var rcv_value=int.Parse(match.Groups["value"].Value);

Answer 2

You can achieve this using an regular expression easily enough, as per the example below.

Regex expr = new Regex(@"^(?<Key>.*)=(?<Value>.*)$", RegexOptions.IgnoreCase | RegexOptions.Singleline);

var m = expr.Match("SUBJECT=Some text here\r\n");
var key = m.Groups["Key"].Value;
var value = m.Groups["Value"].Value;
// or 
var kvp = new KeyValuePair<string, string>(m.Groups["Key"].Value, m.Groups["Value"].Value);

Or alternatively if you do not want to use a regular expression you can split the string using the = as a delimiter and then parse the values in pairs.

Answer 3

Use string spilt to split it into multiple lines, and then loop over the array. After this i would use indexof and either substring or string remove to get the parts i want.

This all being said, this questions smells of "do my work for me". I would recommend going to www.codeproject.com and learn the basics.

Answer 4

尝试

var RCV_VALUE = Regex.Match(myString, "RCV_VALUE=(\d+)").Groups[1].Value