正则表达式替换字符并在.net C#中转换为大写

Question

我有一个巨大的json字符串。我想将属性名称的所有“_abc”引用替换为“Abc”。如何在 C# 中使用 Regex 来做到这一点？

使用普通的 .net 替换，我可以执行以下操作来删除“_”实例，但不确定如何将第一个字母转换为大写。

text = jsonString.Replace("\"_", "\"");

谢谢，杰

Answer 1

因为你想要速度，这可能会也可能不会让你感兴趣unsafe public static string Convert(string input){&nbsp; &nbsp;fixed (char* pInput = input)&nbsp; &nbsp;{&nbsp; &nbsp; &nbsp; char* p1, p2, len = pInput + input.Length;&nbsp; &nbsp; &nbsp; for (p1 = p2 = pInput + 1; p2 < len; p1++, p2++)&nbsp; &nbsp; &nbsp; &nbsp; &nbsp;*p1 = *(p2 - 1) == '"' && *p2 == '_' ? char.ToUpper(*++p2) : *p2;&nbsp; &nbsp; &nbsp; return input.Substring(0, (int)(p1 - pInput));&nbsp; &nbsp;}}它只是简单地替换"_<char>为"<Upper case char>在我的电脑上它可以做到 445 Mb 1.8 秒样本输入{&nbsp; &nbsp;"menu":{&nbsp; &nbsp; &nbsp; "id":"_file",&nbsp; &nbsp; &nbsp; "value":"_file",&nbsp; &nbsp; &nbsp; "popup":{&nbsp; &nbsp; &nbsp; &nbsp; &nbsp;"menuitem":[&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; {&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;"value":"_new",&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;"onclick":"_createNewDoc()"&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; },&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; {&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;"value":"_open",&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;"onclick":"_openDoc()"&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; },&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; {&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;"value":"_close",&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;"onclick":"_closeDoc()"&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; }&nbsp; &nbsp; &nbsp; &nbsp; &nbsp;]&nbsp; &nbsp; &nbsp; }&nbsp; &nbsp;}}输出{&nbsp; &nbsp;"menu":{&nbsp; &nbsp; &nbsp; "id":"File",&nbsp; &nbsp; &nbsp; "value":"File",&nbsp; &nbsp; &nbsp; "popup":{&nbsp; &nbsp; &nbsp; &nbsp; &nbsp;"menuitem":[&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; {&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;"value":"New",&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;"onclick":"CreateNewDoc()"&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; },&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; {&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;"value":"Open",&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;"onclick":"OpenDoc()"&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; },&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; {&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;"value":"Close",&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;"onclick":"CloseDoc()"&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; }&nbsp; &nbsp; &nbsp; &nbsp; &nbsp;]&nbsp; &nbsp; &nbsp; }&nbsp; &nbsp;}}