c#服务器端构造json对象，字符串过滤函数string2Json

public String string2Json(String s) { StringBuilder sb = new StringBuilder(s.Length + 20); sb.Append('/"'); for (int i = 0; i < s.Length; i++) { char c = s[i]; switch (c) { case '/"': sb.Append("///""); break; case '//': sb.Append("////"); break; case '/': sb.Append("///"); break; case '/b': sb.Append("//b"); break; case '/f': sb.Append("//f"); break; case '/n': sb.Append("//n"); break; case '/r': sb.Append("//r"); break; case '/t': sb.Append("//t"); break; default: sb.Append(c); break; } } sb.Append('/"'); return sb.ToString(); }