c# - Plus sign in query string
I have a webapp created using C# and asp.net. I placed a parameter value in the querystring with a plus(+) sign. But the plus sign disappear.
How can I include the plus sign(+) in the query string without disappearing?
Please advise.
Thanks.
Edit: added code with UrlEncode
string str = Server.UrlEncode(Requery.QueryString["new"]);
Answer
Solution:
+
sign has a semantic meaning in the query string. It is used to represent a space. Another character that has semantic importance in the query string is &
which is used to separate the various var=value
pairs in the query string.
Most server side scripts would decode the query parameters before using them, so that a +
gets properly converted to a space. Now, if you want a literal +
to be present in the query string, you need to specify %2B
instead.
+
sign in the query string is URL-decoded to a space. %2B
in the query string is URL-decoded to a + sign.
See the difference between
http://www.google.com/search?q=foo+bar
and
http://www.google.com/search?q=foo%2Bbar
In the above examples, Google's server script is URL-decoding the query parameters and then using them to do the search.
URL-encoding is nothing but %
sign followed by the hex-code of the special character. For example, we know that the hex code of A
is 0x41 (decimal: 65). Try this:
http://www.google.com/search?q=%41
Hope this makes URL-encoding clear.
So, if you want the +
sign to be preserved when a JavaScript is fetching a URL with +
signs in its query parameters and a server side script would process the query parameters after URL-decoding it, you should URL-encode the query parameters in the URL before using issuing the HTTP get request so that all +
signs are converted to %2B
's when the request reaches the server side script. Now when the server side script URL-decodes the query string, all %2B
's gets converted back to +
signs which is what you want.
See Encode URL in JavaScript? to learn how to URL-encode the parameters using JavaScript. Short answer from the discussion there:
var encodedURL = "http://example.com/foo.php?var=" + encodeURIComponent(param);
Answer
Solution:
You should URLEncode your query string values to make sure any special characters are not lost.
Answer
Solution:
Look at HTML URL Encoding Reference
You need to Encode the + sign - It's value should be %2B
Answer
Solution:
I alter my previous statement so no one gets confused!
Create your url using the Server.UrlEncode. e.g.
string myUrl = "http://myurl?param1=" + Server.UrlEncode("my+param+1");
Answer
Solution:
For the solution, I have applied:
Step 1:Use Server.UrlEncode
method for encoding the URL parameter.
Response.Redirect("YourURL?parameter=Server.UrlEncode(parameterValue.ToString().Trim()");
step 2: on another side, you get a string with a plus(+) sign.
var parameter = Request.QueryString["parameterValue"].ToString().Trim();
This is the result: %2beH8 --> +eH8
Answer
Solution:
Other simple way is, Request.Url.ToString().Substring(Request.Url.ToString().IndexOf("=") + 1)
assuming that my URL is, http://localhost/MyApp/Activate.aspx?ActivationCode=cHbtqH9P2dDZkx/mYUgFFo7nrNqSFgqdPisAzzu5/nwlEYDOHI+CQw==
Answer
Solution:
before send you parameter, you need check if the parameter contains plus sign, if have you need replace to one flag, for example: the parameter is: klasjdlkasd+djid3223 can you replace: klasjdlkasdFLAGdjid3223
and when you go convert, you need replace angain
klasjdlkasd+djid3223
Answer
Solution:
Try this, it works for me:
Request.QueryString["new"].Trim();
Answer
Solution:
The solution is to ALWAYS include .Replace(" ", "+") when you request querystring
string s = Request.QueryString["id"].Trim().Replace(" ", "+");
source: http://www.webmasterworld.com/forum47/3238.htm
Answer
Solution:
Add this line in Decrypt Funcation:
strText = strText.Replace(" ", "+");
Source