hide the pass value in asp.net

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need help
i create a website using asp. this website have a combination of client and server side.
how can i pass a hidden/secured data from another page.
this is my code in passing value using generated by javascript

C#

button.setAttribute("onClick", "window.location.href='processUpdate.aspx?id="+i+"&tagnumber=" + tag[i]+"&con="+con[i]+"&date="+date[i]+"'");

this code is working fine but the data that i passing is visible which is very dangerous.

this is the sample of the above code

C#

localhost:544696/processUpdate.aspx?id=0&tagnumber=SAMPLETAG&con=GOOD&date=2015-12-2

Posted 1-Dec-15 14:39pm

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Suvendu Shekhar Giri · Accepted Answer · 2015-12-01T16:28:00

There are various ways you can pass value from one page to another in ASP.Net and if you want these values to be hidden while passing then you may consider-
Using Public Properties

C#

public int Id
{
    get
    {
        return int.Parse(i);
    }
}
//write properties for other required values similar as above

In the destination page set the source page in PreviousPageType page directive.

HTML

<![CDATA[<%@ PreviousPageType VirtualPath="~/SourcePage.aspx" %>]]>

Now you can access the property like

C#

int Id =PreviousPage.Id;

Check this MSDN link for more details-
How to: Pass Values Between ASP.NET Web Forms Pages[^]

Hope, it helps :)