How to convert '+' and '/' in byte without using Convert.from64BaseString(strinput)?

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My code is for encryption and decryption of url.
But in decryption an error occurs in convert.from64BaseString(strinput), because it fails to convert '+' and '/' .

How can I convert '+'and '/' char in byte, without using convert.from64BaseString() ?

Posted 20-Feb-11 1:00am

tanuja karkar

Updated 20-Feb-11 1:02am

Sandeep Mewara

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OriginalGriff · Answer 1 · 2011-02-20T01:35:00

What is the error? It should not fail to convert either character, they are both in teh default base64 character set: http://en.wikipedia.org/wiki/Base64[^]
When I try, it works fine:

C#

string unicode = "ABCDEFG+/abcedfg";
byte[] ascii = System.Text.Encoding.ASCII.GetBytes(unicode);
string base64 = Convert.ToBase64String(ascii);
byte[] convertBack = Convert.FromBase64String(base64);
string regenerated = System.Text.Encoding.ASCII.GetString(convertBack);
Console.WriteLine(unicode);
Console.WriteLine(regenerated);

How is your code different?

Albin Abel · Answer 2 · 2011-02-20T18:23:00

Hi

I think you have misunderstood your problem. I have seen your question before.

Your problem is not converting, your problem is passing the string as a url QueryString.

the char '+' will not be passed as query string, you will get a blank space. So you need to replace it with other char (before appending the query string), for example replace + with @ and execute the link (may be you need to chk your string already having a @, replace with a char which is not already in the string, may be the replace char also can be passed as a parameter in the querystring). In the target page you may need to replace the @ with the + . So you will get the original string and then you can convert and compare.

How to convert '+' and '/' in byte without using Convert.from64BaseString(strinput)?

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