c# - 在字符串 c# 中查找标记值

Question

我有以下情况。我有这样的模式：

嗨，我叫 ${name}，今年 ${age} 岁。我住在 ${address}

我想在任何句子中获得这些标记的价值：

你好，我的名字是彼得，我今年 22 岁。我住在加利福尼亚州旧金山

所以，我需要 a 中的 key=value Dictionary<string, string>：

${name} = "Peter",
${age} = "22",
${address} = "San Francisco, California"

Answer 1

您是否尝试过使用正则表达式？这是一个经典的正则表达式。一个适合你的句子：

Hi, my name is (?<name>.*), I am (?<age>.*) years old\. I live in (?<address>.*)

用法示例：

Match match = Regex.Match(@"Hi, my name is Peter, I am 22 years old. I live in San Fransisco, California", @"Hi, my name is (?<name>.*), I am (?<age>.*) years old\. I live in (?<address>.*)");

现在，要访问特定组：

match.Groups["name"], match.Groups["age"], match.Groups["address"]

这些会给你你的价值观。当然，您应该首先检查match.IsSuccessRegex 是否匹配。

Answer 2

将您的模式转换为具有命名捕获组的正则表达式：

    string pattern = "Hi, my name is ${name}, I am ${age} years old. I live in ${address}";
    string input = "Hi, my name is Peter, I am 22 years old. I live in San Francisco, California";
    string resultRegex = Regex.Replace(Regex.Escape(pattern), @"\\\$\\\{(.+?)}", "(?<$1>.+)");
    Regex regex = new Regex(resultRegex);
    GroupCollection groups = regex.Match(input).Groups;

    Dictionary<string, string> dic = regex.GetGroupNames()
                                          .Skip(1)
                                          .ToDictionary(k => "${"+k+"}",
                                                        k => groups[k].Value);
    foreach (string groupName in dic.Keys)
    {
        Console.WriteLine(groupName + " = " + dic[groupName]);
    }

Answer 3

string Template = "Hi, my name is ${name}, I am ${age} years old. I live in ${address}";
            Dictionary<string, string> KeyValuePair=new Dictionary<string,string>();
            KeyValuePair.Add("${name}", "Peter");
            KeyValuePair.Add("${age}", "22");
            KeyValuePair.Add("${address}", "San Francisco, California");
            foreach (var key in KeyValuePair.Keys)
            {
                Template = Template.Replace(key, KeyValuePair[key]);
            }

Answer 4

使用方法的一种简单String.Format方法。例如：

string pattern="Hi, my name is {0}, I am {1} years old. I live in {2}";
string result= String.Format(patter,name,age,address);//here name , age, address are value to be placed in the pattern.

有关 的更多参考String.Formate，请参阅：

http://msdn.microsoft.com/en-us/library/system.string.format.aspx