在文件 C# 中查找和替换字符串

Question

I want to find and take the keyword and then match from another keyword and then replace the values from the dictionary. You can see the content below which is in my text file. So, I need to find the $, and then I need to take the words which are within curly braces. For example, I need to take username,serviceName and serviceDescription.

So can you please tell me the easiest way to find this in a file and take the keywords as I described above.

Hi ${username},
Following services has reported  some issue:
${serviceName}: ${serviceDescription}

Thanks in Advance

Answer 1

This is what I came up with:
I used C# Regular expressions and replaced the matches with the corresponding values in the dictionary

class Program
    {
        static readonly Regex re = new Regex(@"\$\{(\w+)\}", RegexOptions.Compiled);
        static void Main(string[] args)
        {
            var dict = new Dictionary<string, string>(StringComparer.OrdinalIgnoreCase) {
                { "username", "alpha" },
                { "serviceName", "azure service" },
                { "serviceDescription", "azure service has stopped" }
           };

            var log = File.ReadAllText("log.txt");

            string output = re.Replace(log, match => dict[match.Groups[1].Value]);
        }
    }

Your output would look something like this

Hi alpha,
Following services has reported  some issue:
azure service: azure service has stopped