Question

在下面的表达中，我只需要替换＆＃34; pmcKey＆＃34;字段值与另一个字符串。＆＃34; pmcKey＆＃34;：＆＃34;值....长＆＃34; ，需要替换＆＃34;价值......长期＆＃34;与其他字符串。如何做到这一点，通过string.replace走很长的路。

{"rd":"1404900091","d":"25994","dddd":99,"pmcKey":"95abcdefgiJBMjU2R0NNS1ciLCJlbmMiOiJBMjU2Q0JDLUhTNTEyIiwiaXYiOiJBQVNNa0lsQ3l6blRsWktiIiwidGFnIjoiUlFuNUhVSWVHMVN0TmxJdXB5SGZNZyIsInppcCI6IkRFRiJ9.6zef568_zt8uZGlOdZZZga0FJV1CJcf-RdEIUk88ZtNyEmVX7eLnuce1nhkROgA03444LRiOxkFLFJ_eW5Um8w.k72DtsRbZzuTqWqOFlacVw.D3Sn9jiKRosZboqE0v999htZuyHu4Eukcq64Df5ga6XEOIOj6vDwR-2_NxzYs58kWpvP999SsXdYfqn1m9--h3lgcJEqOb2z4u_yXzxRWsGQe8kNwdWndFJox699999lQI0djiYAQtkhgqI6hgBS_muWiYar9WpP6K3fxPn99999cXlN6L0RdqWIl_U-wV5mlpMivxfyk0fMVcD1T9GTk99999aHpPPAYJ0pHIOYJjak2tj7J_nK4jPxrw7pNbQ3h2TB71JE5UTs4P9NgsL299999eb2wdJuOgJR9md-8PiGAJvWpgQSQu9HNvGowaTq.9999999991gjk0SQEXxfFBUTJKDANTdVBN52FURbIXQ","id":null,"req":null,"page":1,"CDate":null}

Answer 1

假设您的输入是有效的Json，您可以尝试以下代码：

var input = "{\"rd\":\"1404900091\",\"d\":\"25994\",\"dddd\":99,\"pmcKey\":\"95abcdefgiJBMjU2R0NNS1ciLCJlbmMiOiJBMjU2Q0JDLUhTNTEyIiwiaXYiOiJBQVNNa0lsQ3l6blRsWktiIiwidGFnIjoiUlFuNUhVSWVHMVN0TmxJdXB5SGZNZyIsInppcCI6IkRFRiJ9.6zef568_zt8uZGlOdZZZga0FJV1CJcf-RdEIUk88ZtNyEmVX7eLnuce1nhkROgA03444LRiOxkFLFJ_eW5Um8w.k72DtsRbZzuTqWqOFlacVw.D3Sn9jiKRosZboqE0v999htZuyHu4Eukcq64Df5ga6XEOIOj6vDwR-2_NxzYs58kWpvP999SsXdYfqn1m9--h3lgcJEqOb2z4u_yXzxRWsGQe8kNwdWndFJox699999lQI0djiYAQtkhgqI6hgBS_muWiYar9WpP6K3fxPn99999cXlN6L0RdqWIl_U-wV5mlpMivxfyk0fMVcD1T9GTk99999aHpPPAYJ0pHIOYJjak2tj7J_nK4jPxrw7pNbQ3h2TB71JE5UTs4P9NgsL299999eb2wdJuOgJR9md-8PiGAJvWpgQSQu9HNvGowaTq.9999999991gjk0SQEXxfFBUTJKDANTdVBN52FURbIXQ\",\"id\":null,\"req\":null,\"page\":1,\"CDate\":null}";
var json = JObject.Parse(input);
json["pmcKey"] = "other string";
var result = json.ToString();

编辑如果我的假设错了，你可以使用这样的正则表达式：

var regex = new Regex("\"pmcKey\":\"(?<oldValue>[^\"]+)\"");
var oldValue = regex.Match(input).Groups["oldValue"];
var newValue = "otherValue";
var result = $"{input.Substring(0, oldValue.Index)}{newValue}{input.Substring(oldValue.Index + oldValue.Length)}";

Answer 2

试试正则表达式：

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Text.RegularExpressions;


namespace ConsoleApplication68
{
    class Program
    {
        static void Main(string[] args)
        {
            string input = "{\"rd\":\"1404900091\",\"d\":\"25994\",\"dddd\":99,\"pmcKey\":\"95abcdefgiJBMjU2R0NNS1ciLCJlbmMiOiJBMjU2Q0JDLUhTNTEyIiwiaXYiOiJBQVNNa0lsQ3l6blRsWktiIiwidGFnIjoiUlFuNUhVSWVHMVN0TmxJdXB5SGZNZyIsInppcCI6IkRFRiJ9.6zef568_zt8uZGlOdZZZga0FJV1CJcf-RdEIUk88ZtNyEmVX7eLnuce1nhkROgA03444LRiOxkFLFJ_eW5Um8w.k72DtsRbZzuTqWqOFlacVw.D3Sn9jiKRosZboqE0v999htZuyHu4Eukcq64Df5ga6XEOIOj6vDwR-2_NxzYs58kWpvP999SsXdYfqn1m9--h3lgcJEqOb2z4u_yXzxRWsGQe8kNwdWndFJox699999lQI0djiYAQtkhgqI6hgBS_muWiYar9WpP6K3fxPn99999cXlN6L0RdqWIl_U-wV5mlpMivxfyk0fMVcD1T9GTk99999aHpPPAYJ0pHIOYJjak2tj7J_nK4jPxrw7pNbQ3h2TB71JE5UTs4P9NgsL299999eb2wdJuOgJR9md-8PiGAJvWpgQSQu9HNvGowaTq.9999999991gjk0SQEXxfFBUTJKDANTdVBN52FURbIXQ\",\"id\":null,\"req\":null,\"page\":1,\"CDate\":null}";
            string pattern = "\"pmcKey\":\"[^\"]+\"";

            string output = Regex.Replace(input, pattern, "pmc\":\"abc\"");

        }
    }

}

如何替换长字符串文本中的特定字符串

2 个答案: