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我想编写一个动态搜索函数，它读取一个字符串并将其拆分取决于一些常量。

我的示例代码仅适用于搜索字符串，而不适用于它的不同变体。

        // String to clean
        searchString = "month == Jan || (name == “ni*” && age > 18)";

        const string ageStr = "age";
        const string monthStr = "month == ";
        const string nameStr = "name == ";
        const string startQutation = "“";
        const string endQutation = "”";
        const string star = "*";

        string month = searchString.Substring(searchString.IndexOf(monthStr) + 9, 3);
        searchString = searchString.Remove(searchString.IndexOf(monthStr), 12);

        string nameOrginal = searchString.Substring(searchString.IndexOf(startQutation) + 1, 
                                searchString.IndexOf(endQutation) - searchString.IndexOf("“") - 1);
        string name = nameOrginal;
        if (name.Contains("*"))
        {
            name = name.Remove(name.IndexOf(star), 1);
        }
        searchString = searchString.Remove(searchString.IndexOf(nameStr), 8 + nameOrginal.Length + 2);

        string ageCompare = searchString.Substring(searchString.IndexOf(ageStr) + 6, 2);
        ageCompare = ageCompare.Trim();
        string age = searchString.Substring(searchString.IndexOf(ageStr) + 8, 2);

        MessageBox.Show(string.Format("Name: {0}\nMonth: {1}\nAge:{2}\nAge compare operator:{3}",
                                             name, month, age, ageCompare));

结果是并且应该是：month = "jan" name = "ni" age = 18 ageCompare = ">"

我需要一个更好的函数来清除常量之后的字符串，这样如果字符串与硬编码字符串不同，它就不会出错。

此致

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