class TestEscapeJSString
{ /// <summary>
/// Replace characters for Javscript string literals
/// </summary>
/// <param name="text">raw string</param>
/// <returns>escaped string</returns>
public static string EscapeStringForJS(string s)
{ //REF: http://www.javascriptkit.com/jsref/escapesequence.shtml
return s.Replace(@"\", @"\\")
.Replace("\b", @"\b") .Replace("\f", @"\f") .Replace("\n", @"\n") .Replace("\0", @"\0") .Replace("\r", @"\r") .Replace("\t", @"\t") .Replace("\v", @"\v") .Replace("'", @"\'") .Replace(@"""", @"\""");
}
public static void Test()
{ Stopwatch sw = new Stopwatch();
sw.Start();
string s = "I'm PC!\n\"I\tam\tPC!\"\n";
for (int i = 0; i < 3000000; i++)
{ string t = EscapeStringForJS(s);
}
sw.Stop();
Console.WriteLine("Duration {0}ms", sw.ElapsedMilliseconds); }
//Method 2,
//Using Dictionary to store the escape characters mapping
//But it's slower than hard-coding style
//3,000,000 times: 6,145ms vs 8,181ms
static Dictionary<string, string> escMap =
new Dictionary<string, string>()
{ {"\b", @"\b"}, {"\f", @"\f"}, {"\n", @"\n"}, {"\0", @"\0"}, {"\r", @"\r"}, {"\t", @"\t"}, {"\v", @"\v"}, {"'", @"\'"}, {@"""", @"\"""} };
public static string EscapeStringForJSX(string s)
{ s = s.Replace(@"\", @"\\");
foreach (string k in escMap.Keys)
s = s.Replace(k, escMap[k]);
return s;
}
}