Jul
04
2005
C# encode a string for JSON JavaScript
Posted by admin under
.NET
This function was found in this zipfile
/// FUNCTION Enquote Public Domain 2002 JSON.org
/// @author JSON.org
/// @version 0.1
/// Ported to C# by Are Bjolseth, teleplan.no
public static string Enquote(string s)
{
if (s == null || s.Length == 0)
{
return "\"\"";
}
char c;
int i;
int len = s.Length;
StringBuilder sb = new StringBuilder(len + 4);
string t;
sb.Append('"');
for (i = 0; i < len; i += 1)
{
c = s[i];
if ((c == '\\') || (c == '"') || (c == '>'))
{
sb.Append('\\');
sb.Append(c);
}
else if (c == '\b')
sb.Append("\\b");
else if (c == '\t')
sb.Append("\\t");
else if (c == '\n')
sb.Append("\\n");
else if (c == '\f')
sb.Append("\\f");
else if (c == '\r')
sb.Append("\\r");
else
{
if (c < ' ')
{
//t = "000" + Integer.toHexString(c);
string tmp = new string(c,1);
t = "000" + int.Parse(tmp,System.Globalization.NumberStyles.HexNumber);
sb.Append("\\u" + t.Substring(t.Length - 4));
}
else
{
sb.Append(c);
}
}
}
sb.Append('"');
return sb.ToString();
}
It's public domain but the strange thing is that the zipfile is not linked from the json.org homepage, anyway my point is that the function - while it might not be rocket science, still is too good to have to just be lying inside a strange zipfile.
What does it do? In encodes a string so it can be used inside a JSON expression. It is so useful to be able to be alto to send anything (html, special characters etc) inside the json string.