StrataFrame Forum » StrataFrame Application Framework - V1 » WebForms (How do I?) » How do I pass parameters to a web form without putting them in the querystring?

How do I pass parameters to a web form without putting them in the querystring?

Marcia G Akins — Thu, 05 Jan 2012 12:48:51 GMT

Hi all.

This a a very noobie question, but I do mostly winforms development. I need to create a web page that I can send a link to from my winofrms app. I do not want to put something like this:

?pk=1010&user_id=akinsm

in the URL for obvious reasons. My first impulse when I see things like this is to put in different values and see what I can see :)

So, I am creating my web page using StrataFrame and I just need to know the best way to pass the parameters when I send the link from my winforms app.

TIA

Marcia

RE: How do I pass parameters to a web form without putting them in the querystring?

Marcia G Akins — Thu, 05 Jan 2012 12:48:51 GMT

Hi all.

I finally got this figured out. All I needed was this on the Decrypt:

String DecryptedSignOffID = _3des.Decrypt(Request["pk"].Replace(" ", "+"));

RE: How do I pass parameters to a web form without putting them in the querystring?

Marcia G Akins — Thu, 05 Jan 2012 12:02:31 GMT

[quote][b]Trent L. Taylor (1/4/2012)[/b][hr]You can do it several ways. You can use a POST operation instead of a GET. GET operations expose the query string like you mentioned and is more limited in the length. If you want to use a GET operation, you can encrypt it using the StrataFrame 3DES class or even create a Base64 output.[/quote]

Hi Trent.

I tried using the 3DES class but when I try to decrypt using this code:

String DecryptedSignOffID = _3des.Decrypt(Request["pk"].ToString());

I wind up with this error instead of the web page:

System.FormatException was unhandled by user code
Message=Invalid length for a Base-64 char array.
Source=mscorlib
StackTrace:
       at System.Convert.FromBase64String(String s)
       at MicroFour.StrataFrame.Security.Encryption.TripleDESWrapper.Decrypt(String text)
       at StlCI_new.EditSignOff.Page_Load(Object sender, EventArgs e) in C:\StlCI_new\StlCI_new\StlCI_new\EditSignOff.aspx.cs:line 25
       at System.Web.Util.CalliHelper.EventArgFunctionCaller(IntPtr fp, Object o, Object t, EventArgs e)
       at System.Web.Util.CalliEventHandlerDelegateProxy.Callback(Object sender, EventArgs e)
       at System.Web.UI.Control.OnLoad(EventArgs e)
       at System.Web.UI.Control.LoadRecursive()
       at System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)
InnerException:

Now, the goofy thing is that just for grins and giggle, I tried decrypting the value right after I encypted it like so:

string EncrytedSignOffID = _3des.Encrypt(e.BusinessObject["sign_off_id"].ToString());

string DecrytedSignOffID = _3des.Decrypt(EncryptedSignOffID);

and it was happy as a clam. So apparently, there is an issue trying to decrypt the string when it is used as part of a QueryString, but I have absolutely no idea what the problem could be.

Can you help?

TIA

Marcia

RE: How do I pass parameters to a web form without putting them in the querystring?

Marcia G Akins — Wed, 04 Jan 2012 11:52:31 GMT

[quote][b]Edhy Rijo (1/4/2012)[/b][hr]
Hi Marcia, here is a quick sample on how to use the SF encryption class: http://forum.strataframe.net/FindPost19605.aspx[/quote]

Thanks for the link, Edhy. I will look at it as soon as I get this page laid out and functioning.

RE: How do I pass parameters to a web form without putting them in the querystring?

Edhy Rijo — Wed, 04 Jan 2012 11:23:16 GMT

[quote][b]Marcia G Akins (1/4/2012)[/b][hr]I will search the StrataFrame docs to see how to use the 3DES class to do this and if I get stuck I will come back here crying for more help.[/quote]
Hi Marcia, here is a quick sample on how to use the SF encryption class: http://forum.strataframe.net/FindPost19605.aspx

RE: How do I pass parameters to a web form without putting them in the querystring?

Marcia G Akins — Wed, 04 Jan 2012 08:26:00 GMT

RE: How do I pass parameters to a web form without putting them in the querystring?

Trent L. Taylor — Wed, 04 Jan 2012 08:06:04 GMT

You can do it several ways. You can use a POST operation instead of a GET. GET operations expose the query string like you mentioned and is more limited in the length. If you want to use a GET operation, you can encrypt it using the StrataFrame 3DES class or even create a Base64 output.

Another option is to use session variables between pages. For example:

Adding a Session Variable
[codesnippet]this.Session.Add("MyVariableName", MyValue)[/codesnippet]

Retrieving a Session Variable
[codesnippet]string myValue = (string)this.Session["MyVariableName"][/codesnippet]

Hope this helps get you started.