ASP.NET

http request and web request

15-Nov-09 7:04

Aftab Sindhi wrote:
In short, problem is on 1st click, while subsequent clicks are working as expected.

Just Debug the code.

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noo.dyab15-Nov-09 5:07

noo.dyab

15-Nov-09 5:07

hello
what is the difference between httpwebrequest,httpwebresponse and webrequest,webresponse
in asp.net and what do they use for

Re: http request and web request

Abhishek Sur15-Nov-09 6:16

can we store viewstate in masterpage?

15-Nov-09 6:16

HttpRequest / HttpResponse classes are derived from WebRequest and WebResponse classes which can handles only Http request and response.
The method WebRequest.Create returns appropriate object based on the url passed. Say you pass
http://www.google.com
The create factory method will then produce HttpWebRequest object as Http protocol is used. On the other hand if you use Ftp urls it will produce FtpWebRequest object.So we write :

HttpWebRequest req = WebRequest.Create("http://www.google.com") as HttpWebRequest;

If you are not sure about the url passed, you can easily use WebRequest class.

Cool | :cool:

Abhishek Sur
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Suresh Pirsquare14-Nov-09 19:31

14-Nov-09 19:31

can we store viewstate in masterpage. so that when a user tries to open a new tab, the id is fetched from the viewstate.

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Abhijit Jana14-Nov-09 19:55

14-Nov-09 19:55

Suresh Dayma wrote:
can we store viewstate in masterpage.

I didn't get your question. What do you mean by store view state in master page. I would suggest you to have a qucik look into Beginner's Guide To View State [^]article, and let me know if you have any more issue.

Abhijit Jana | Codeproject MVP
Web Site : abhijitjana.net
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Suresh Pirsquare14-Nov-09 20:16

14-Nov-09 20:16

Thanks for your reply.

ok, just take an example

this is what i want

in masterpage, i have created a label called 'customer name'.
and fetched the customer name from the database and assigned it to the label. when i navigate from one page to another then, I just want to retain the customer name across multiple pages without having to interact with the database.
(Assume there is a single master page and multipe content pages.)

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Abhijit Jana14-Nov-09 20:30

14-Nov-09 20:30

Suresh Dayma wrote:
when i navigate from one page to another then, I just want to retain the customer name across multiple pages without having to interact with the database.

For that you need to use Session insted of ViewState. Fetch the data first time from DB and put it into session. Now you can access them any where from your site.
Following code is used for storing a value to session
Collapse

//Storing UserName in Session
 Session["CustomerName"] = dbUserName;

Now, let see how we can retrieve values from Session
Collapse

//Check weather session variable null or not
        if (Session["CustomerName"] != null)
        {
            //Retrieving UserName from Session
            lblWelcome.Text = "Welcome : " + Session["CustomerName"];
        }
        else
        {
         //Do Something else
        }

Hope this will help you. If you want to know more about the session, please read this one : Exploring Session in ASP.Net[^]

Abhijit Jana | Codeproject MVP
Web Site : abhijitjana.net
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Suresh Pirsquare14-Nov-09 20:38

14-Nov-09 20:38

Currently, i have used the sessions to store this.
but when the user tries to open it in a new tab then this does not work.

Example
I have a gridview having multiple customers.
if i open multiple customer details on multiple tabs then it will overwrite the customer details.
so it does not make sense to store customer details in Session.

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Abhijit Jana14-Nov-09 21:12

14-Nov-09 21:12

Suresh Dayma wrote:
but when the user tries to open it in a new tab then this does not work.

Are you talking about browser new Tab ?

Abhijit Jana | Codeproject MVP
Web Site : abhijitjana.net
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Suresh Pirsquare14-Nov-09 23:11

14-Nov-09 23:11

yes, you are correct

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Suresh Pirsquare14-Nov-09 23:49

14-Nov-09 23:49

Hi abhijit, is there any work around for this issue?

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Abhishek Sur14-Nov-09 22:44

14-Nov-09 22:44

I think you need to use Database.
Once it is modified, just store it into database and from any other tab / in any other browser in the world, it will be shown updated.

No need for ViewState / Session etc. Wink | ;)

If this is your temporary storage, u might use temporary database tables as well. Rose | [Rose]

Abhishek Sur
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Suresh Pirsquare14-Nov-09 23:46

14-Nov-09 23:46

I dont think this is the solution.

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Abhishek Sur15-Nov-09 0:06

15-Nov-09 0:06

Then please let me clear this.

If you open a new browser tab, it doesnt allow you to access any data from other tab because of security issues.
Mozilla retains its session data for every tab. So in case of mozilla, it do work in multiple tabs. But in IE it doesnt.

One thing that you might use is Cookie. If you call a server for same domain, you can use it to send data.

Say you call

www.xyz.com

it can create cookie data in browser based on the address. So that after a certain while or at the same instant if a new browser is opened and same address is navigated, you will find the data from cookie easily.

Say you write like this :

<code>Response.Cookies["txtCookie"].Value = this.txtcookie.Text;
Response.Cookies["txtCookie"].Expires = DateTime.Now.AddDays(1);

Now from another browser instance if you call
string txtCookie = Request.Cookies["txtCookie"].Value;
it will give you appropriate data. By this way you can send data to different browser instances.

Cool | :cool:

Abhishek Sur
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N a v a n e e t h14-Nov-09 21:02

N a v a n e e t h

14-Nov-09 21:02

Abhijit Jana wrote:
lblWelcome.Text = "Welcome : " + Session["CustomerName"];

This won't compile. Adding a string and object is invalid. You need ToString().

lblWelcome.Text = "Welcome : " + Session["CustomerName"].ToString();

Best wishes,
Navaneeth

Abhijit Jana14-Nov-09 21:09

14-Nov-09 21:09

My Bad. Thanks for correcting me !! Thumbs Up | :thumbsup:

Abhijit Jana | Codeproject MVP
Web Site : abhijitjana.net
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Suresh Pirsquare14-Nov-09 23:08

14-Nov-09 23:08

is there any workaround for this issue?

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Abhishek Sur14-Nov-09 23:22

14-Nov-09 23:22

I have already suggested one workaround I guess...

See,
Viewstate is stored in page (So Rejected)
Session is stored in server but for a single session (Rejected as IE opens a new session for each tab)
Application is User Independent.
Cookie ... Domain specific. Its possible to use this, But I dont like it as client can easily clear that. Also if is browser specific. Say one person opens the same site once in IE another in Mozilla.. Cookies will be different, (Hence Rejected)

So there is only one option. Just change it globally, so that anywhere the change is reflected.

Hope you got it.
cheers.
Rose | [Rose]

Abhishek Sur
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Suresh Pirsquare14-Nov-09 23:34

14-Nov-09 23:34

I really appreciate your help. but still i have to make changes in all the content pages(i.e. globally) right.

Isn't there way by which i have to make changes in the masterpage itself?

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Abhishek Sur14-Nov-09 23:35

14-Nov-09 23:35

You are most welcome..

Dont forget to click "good answer" if it actually helped you and also to mark that as answer for future reference. Wink | ;)

Abhishek Sur
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Abhishek Sur15-Nov-09 0:09

15-Nov-09 0:09

No you can do that in Masterpage as well. Just write your code in masterpage page_load and it will work perfectly. Smile | :)

Abhishek Sur
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Suresh Pirsquare15-Nov-09 0:34

15-Nov-09 0:34

No dear, it does not work.

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Abhishek Sur15-Nov-09 0:42

15-Nov-09 0:42

Tell me what you did so far.

Just do like this :

write
Response.Cookies["txtCookie"].Value = myid;
Response.Cookies["txtCookie"].Expires = DateTime.Now.AddDays(1);

inside your masterpage, and it will be accessible to any page that inherits masterpage (also normal pages)

I have done this a lot of times, and it worked perfectly...
To request the cookie use
Request.Cookies["txtCookie"]

Big Grin | :-D

Abhishek Sur
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Suresh Pirsquare15-Nov-09 1:06