hi all,

i am using encryption and decryption for query string variable

i am encrypting the url value before assign to url

Response.Redirect("DownloadPrintFiles.aspx?url=" + Encrypt(e.CommandArgument.ToString(), true));

encrypted url value is 6p39b2r4+L88jZwad7Wiu/O48DcV7s0dEcvTvXv97DKHu3/7Yn0DnnEuBP+KLLmsyoUEgjjPjnc=

string folderToBrowse = Request.QueryString["url"] == null ? System.Configuration.ConfigurationManager.AppSettings["PrintedFilePath"] : Decrypt(Request.QueryString["url"], true);

now i am retriving the url value from request.querystring["url"],true)

i am getting output as  6p39b2r4 L88jZwad7Wiu/O48DcV7s0dEcvTvXv97DKHu3/7Yn0DnnEuBP KLLmsyoUEgjjPjnc=

 what i am observed is in when i am retriveing the url from http path its replacing the + symbol with space character

 can any help on this topic and what i have to do to avoid such problem please help me

thanks in advance

Your problem lies in understanding the different encodings that are being used. You encryption function is returning output that is Base64 encoded (http://en.wikipedia.org/wiki/Base64). Unfortunately, Base64 is not safe in a URL, as you have discovered. In particular, the '+' character is a special character in a URL, as indeed is the '=' character. You therefore need to URL encoded your encrypted string before you can use it as part of a URL. I suggest you use the Server.UrlEncode and Server.UrlDecode methods to make sure that the data can be passed through successfully:

http://msdn.microsoft.com/en-us/library/zttxte6w.aspx

thanks alot