Redirection in web service

[Dimon]

Hi guys,
I need an advice ASAP. I have two asp pages with forms but I need to do processing in .NET, i.e. when user submits first form it validates all the fields and if ok data goes to database and then it redirects user to second page with some fields pre-popped. So I decided to create a web service which does everything I need with all form field values from first form but the problem is I'm not sure how to redirect user to the next form after processing is done and also having some values returned from the first form?
If web service is not a option then what do you think would help me in this case? How to process all field values using .NET? Like I said there is no CodeBehind stuff since pages are written in regular asp.

Thanks in advance.

[nateraaaa]

Within your asp code you will need to send data to the webservice via a request object. The web service will return you a response object with whatever data you need in it. In the same asp page that you sent the request in you will retrieve the response object. Now you can verify the response object came back with data and use the values in the response to assign hidden field values or session values that you will use in the page that you redirect to. Give this a try and let us know if you get stuck on something.

Nathan

[Plater]

You could have the webservice return a status ( like "Good" or "Error: <error>") and based on the return value the page can either redirect to that 2nd page or tell the user that they need to change something before they can proceed.

Page two can just try and get values from the database?

[Dimon]

thanks guys, I'll try it and let you know

[Dimon]

Within your asp code you will need to send data to the webservice via a request object. The web service will return you a response object with whatever data you need in it. In the same asp page that you sent the request in you will retrieve the response object. Now you can verify the response object came back with data and use the values in the response to assign hidden field values or session values that you will use in the page that you redirect to. Give this a try and let us know if you get stuck on something.

Nathan

ok so I don't really understand how to implement it, let me try to interpret what you said in code language:

Say first page has the following:

<form name="Form1" onsubmit="retur n DoValidation(th is)" action="http://www.DomainName. com/WebService1/Service1.asmx/ZipTest" method="POST">
<input type="hidden" name="UId" value="test">

ZipTest web method is doing all the processing and return entered Zip code so that second page should have Zip field pre-popped as well as value of hidden field "UId".
So when I click submit it actually does everything I need and of course it goes to http://www.DomainName.com/WebService...1.asmx/ZipTest with XML with Zip value returned which is not what I need. How then I redirect user to the Page2.

Page two can just try and get values from the database?

Retrieving values from the database is not an option due to different reasons.

[Plater]

Are the values to be used produced by the webservice, or produced bye the first page?

Here's what I am thinking:
Page1
----------
Have your values or whatever you need and your button.
When the button gets clicked, the backend code sends the request to the webservices and gets a reply back.
If the reply is a "failure" reply, display some message to the user (or whatever you want)
If the reply is a "success" reply, it will also contain all the values you need for the 2nd page.
Take those values and populate the Session object with them.
Redirect to page2.

Page2:
----------
Read in the values from the Session object.
If the values are not in the session object, redirect to page1.
Populate your fields based on the values from the Session object.

[Dimon]

Are the values to be used produced by the webservice, or produced bye the first page?

Here's what I am thinking:
Page1
----------
Have your values or whatever you need and your button.
When the button gets clicked, the backend code sends the request to the webservices and gets a reply back.
If the reply is a "failure" reply, display some message to the user (or whatever you want)
If the reply is a "success" reply, it will also contain all the values you need for the 2nd page.
Take those values and populate the Session object with them.
Redirect to page2.

Page2:
----------
Read in the values from the Session object.
If the values are not in the session object, redirect to page1.
Populate your fields based on the values from the Session object.

Sorry, maybe this is a stupid question, but how do i do this part - "When the button gets clicked, the backend code sends the request to the webservices and gets a reply back."? That's actually what I'm trying to figure out :)
What do I put in action property? Cause currently that's what I have:

<form name="Form1" onsubmit="retur n DoValidation(th is)" action="http://www.DomainName. com/WebService1/Service1.asmx/ZipTest" method="POST">

[hdanw]

Your all going about it Wrong.( if your using asp.net)

WHEN you click on an ASP.NET button, You have already "posted" back to the server.

On the design page, double click your submit button. This takes you to the code behind file for the page. You can access the Database directly at this point. You should also have access to all of the ASp.net form fields, the session object, the application object, the viewstate information etc.

When your done pluging the info into the DB, then transfer directly to your new page. Server.transfer , or response.redire ct.

It really is easier than you are making it.

Web services are a lot handier for something like "Internet enabled applications" Your "Web Application" is already running on the server. The only reason you would need Web Services is to access or provide access to information, or functionality that is on a different server.

For example you May want to run a mail list on a different site, and have your app running on one server while issuing commands to the mail list application on another server.

also,
If you are waiting for a service request to complete, you'll notice that your page is pretty well locked up until it finishes, unless you do an asynchronous call.

[Dimon]

Your all going about it Wrong.( if your using asp.net)

WHEN you click on an ASP.NET button, You have already "posted" back to the server.

On the design page, double click your submit button. This takes you to the code behind file for the page. You can access the Database directly at this point. You should also have access to all of the ASp.net form fields, the session object, the application object, the viewstate information etc.

When your done pluging the info into the DB, then transfer directly to your new page. Server.transfer , or response.redire ct.

It really is easier than you are making it.

Web services are a lot handier for something like "Internet enabled applications" Your "Web Application" is already running on the server. The only reason you would need Web Services is to access or provide access to information, or functionality that is on a different server.

For example you May want to run a mail list on a different site, and have your app running on one server while issuing commands to the mail list application on another server.

also,
If you are waiting for a service request to complete, you'll notice that your page is pretty well locked up until it finishes, unless you do an asynchronous call.

Thanks, but if you read my first post you'll see that pages are written in regular asp and so there is no code behind page otherwise I wouldn't ask :)

[hdanw]

Thanks, but if you read my first post you'll see that pages are written in regular asp and so there is no code behind page otherwise I wouldn't ask :)

I wasn't sure whether you had thought they were the same or intentionally left off the .net.

another way is to use java, request a dummy web page, pass a query string, and build a document with the response information you want. All of this can be done without upsetting the current page. If the right response is recieved, then proceed to the next page.

Not unlike using a .net service, however, you don't need asp.net to manage the asmx file. and it will work with any code behind, pre-markup technology.


Good luck & happy coding.