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I need to pass special characters like #,! etc in URL to Facebook,Twitter and such social sites. For that I am replacing such characters with URL Escape Codes.
return valToEncode.Replace("!", "%21").Replace("#", "%23")
.Replace("$", "%24").Replace("&", "%26")
.Replace("'", "%27").Replace("(", "%28")
.Replace(")", "%29").Replace("*", "%2A");
It works for me, but I want to do it more efficiently.Is there any other way to escape such characters? I tried with Server.URLEncode() but Facebook doesn't render it.
Thanks in advance,
Priya
509
URL Encoding (Percent Encoding)URL encoding replaces unsafe ASCII characters with a "%" followed by two hexadecimal digits. URLs cannot contain spaces. URL encoding normally replaces a space with a plus (+) sign or with %20.
A space is assigned number 32, which is 20 in hexadecimal. When you see “%20,” it represents a space in an encoded URL, for example, http://www.example.com/products%20and%20services.html.
Percent-encoding is a mechanism to encode 8-bit characters that have specific meaning in the context of URLs. It is sometimes called URL encoding. The encoding consists of substitution: A '%' followed by the hexadecimal representation of the ASCII value of the replace character.
You should use the **Uri.EscapeDataString** method if you want to have compatibility with RFC3986 standard, where percent-encoding is defined.
For example spaces always will be encoded as %20 character:
var result = Uri.EscapeDataString("a q");
// result == "a%20q"
while for example usage of HttpUtility.UrlEncode (which is by the way internally used by HttpServerUtility.UrlEncode) returns + character:
var result = HttpUtility.UrlEncode("a q")
// result == "a+q"
What's more, the behavior of Uri.EscapeDataString is compatible with client side encodeURIComponent javascript method (except the case sensitivity, but RFC3986 says it is irrelevant).
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