How to mimic ASP Server.URLEncode in ASP.NET?

Question

In ASP:

Server.URLEncode("+&(). -*<>/\|")
' returns %2B%26%28%29%2E+%2D%2A%3C%3E%2F%5C%7C

In ASP.NET

Uri.EscapeDataString("+&(). -*<>/\|")
// returns %2B%26().%20-*%3C%3E%2F%5C%7C

HttpUtility.UrlEncode("+&(). -*<>/\|") 
// returns %2b%26().+-*%3c%3e%2f%5c%7c

Is there any elegant way how to mimic old ASP behavior in ASP.NET?

Guffa · Accepted Answer · 2010-01-06 11:43:51Z

3

You can use a regular expression to match the characters that you want to convert, and a lambda expression for creating the hex code:

string input = @"+&(). -*<>/\|";
string encoded = Regex.Replace(
  HttpUtility.UrlEncode(input),
  @"[()\.\-*]",
  m => "%" + Convert.ToString((int)m.Captures[0].Value[0], 16)
);

answered Jan 6, 2010 at 11:43

Guffa

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1 Comment

Jakub Šturc Over a year ago

I cannot call Regexp elegant but I guess that's best I can get so I accept. Thanks.

Ravi Vanapalli · Accepted Answer · 2010-01-06 11:35:51Z

0

You can try using Server.UrlEncode(), which is supported in ASP.Net.

answered Jan 6, 2010 at 11:35

Ravi Vanapalli

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1 Comment

AnthonyWJones Over a year ago

Does that produce a different result than HttpUtility.UrlEncode?

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