passing session variables from asp code to C# code

Question

I have a .asp code which I generate several session variables in it and then I redirect it to a c# doe. I am trying to read these session variables which are coming from the.asp code into my C# code, but it seems that I cannot pass those into my c# code. I can get the value of the session variables while I am still on .asp part but as soon as I redirect to c# code and try to get the session variables(and value of them), the value does not come through.

asp part:

response.write("Session(oldID)=&Session("oldID"))

c# part:

string oldIDSession = (string)(Session["oldID"]);

Think your code snippet is wrong should be response.write("Session(oldID)=" & Session("oldID")). It's not important for the question mind. — user692942
– user692942, Commented Mar 24, 2016 at 16:10

Community · Accepted Answer · 2017-05-23 12:07:46Z

2

The Classic ASP web application and the ASP.NET web application (C# code) are run in separate application domains of IIS and hence the session values cannot be shared.

You can share the required data to the ASP.NET (C#) web application using query strings or making a direct post request to the C# code.

Refer this post to know about passing data to C# page using query string.

Or, for posting the data using POST (in case you need to send lots of data to c# code) change the action attribute of the form in asp page to the c# (aspx page) to which the data should be posted.

EDIT

In the classic asp page you need to do something like (refer this):

<form action="http://example.com/TestApp/YourPage.aspx" method="post">
    // form elements
</form>

And then, to read the posted values in your c# page you need to use (refer this):

string paramValue = Request.Form["key"]; // where key is the parameter name

edited May 23, 2017 at 12:07

CommunityBot

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answered Mar 24, 2016 at 16:04

Bharat Gupta

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2 Comments

Shab Over a year ago

Can you give me an example for your second method?(POST)

Shab Over a year ago

Thanks Bharat Gupta.

Community · Accepted Answer · 2017-05-23 12:31:27Z

0

Please refer to this post

I am not sure scale or nature of your application but I would suggest not to make your C# classes dependent upon session, they would be easy to test. For example.

//In your Asp.Net
int productId = (int)Session["productId"];

//In you c# code
public Product GetProductById(int productId){

}

edited May 23, 2017 at 12:31

CommunityBot

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answered Mar 24, 2016 at 15:52

vabii

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2 Comments

user447356 Over a year ago

Totally not relevant, you missed the part about Classic ASP here.

vabii Over a year ago

Oh! Yes, I see it now.

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