How can i pass the value of 2nd page to the default page?

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I want to pass the value of label on my MSG.aspx.cs to Default.aspx.cs.

I'm using a session here, does anyone know any other options on how to do this??

(If my question is not clear, The program is loading the Default.aspx.cs first then on Page_Load it should call the MSG.aspx.cs then get the value of label on MSG.aspx.cs)

What I have tried:

Default.aspx.cs

C#

protected void Page_Load(object sender, EventArgs e)
{
   lblName.Text = Session["name"].ToString();
}

MSG.aspx.cs

C#

Match sndrNameMatch = Regex.Match(body, @"From: ([A-Za-z0-9\-]+)", RegexOptions.IgnoreCase);
            
lblName.Text = sndrNameMatch.Value;
Session["name"] = lblName.Text;

Posted 19-Feb-16 2:23am

Member 11525563

Updated 19-Feb-16 2:41am

v2

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ZurdoDev · Accepted Answer · 2016-02-19T02:33:00

Solution 1

You can use Session, QueryString, or Application Cache from server side. From the client side you can use cookies or localStorage.

However, there is nothing wrong with using the session so I'd suggest just leaving it alone.

Posted 19-Feb-16 2:33am

ZurdoDev

Comments

Member 11525563 19-Feb-16 8:38am

On my code i'm having an error like this:

Object reference not set to an instance of an object.
Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.

Exception Details: System.NullReferenceException: Object reference not set to an instance of an object.

Source Error:

Line 43: prevEmail.Visible = false;
Line 44: }
Line 45: lblName.Text = Session["name"].ToString();
Line 46: }
Line 47:

Richard Deeming 19-Feb-16 8:50am

Probably because you haven't set Session["name"] to anything at that point.

ZurdoDev 19-Feb-16 8:58am

As Richard said, you haven't put anything into Session["name"]. Either initialize it somewhere or check for null first.

if (Session["name"] != null)
{
...
}

Member 11525563 19-Feb-16 9:03am

That's the main problem, because on Page_load of Default.aspx.cs i want to get the value/Session of Session["name"] that is on MSG.aspx.cs

ZurdoDev 19-Feb-16 9:05am

Ok, so check if it is null or not. Very simple.

Member 11525563 19-Feb-16 10:10am

No, on Msg.aspx.cs the Session["name"] is not null so i want to pass its value on Default.aspx.cs

ZurdoDev 19-Feb-16 10:12am

Where are you stuck? Session is across every page. It cannot be null on one page and not null on another. Once it is set, it will be there for every page until the session ends or you change it.

So, what exactly is your question? There is no passing to Default.aspx. If Msg.aspx is loaded first and it sets Session["name"] then when you go to default.aspx it will be set.

Member 11525563 19-Feb-16 10:43am

The default.aspx.cs should load first then get the session["name"] on msg.aspx.cs

ZurdoDev 19-Feb-16 10:54am

OK. Do you have a question?