Passing a Query String Result to a Variable

Question

I am trying to request a Query String and insert the value into a variable in C#. I have tried three different way: parsing, converting, and assigning an intermediate string to then be converted to a int. The variable is then put into a database. The problem is that every request comes results null when to URL is displaying the proper ID.

Here is the post back:

<%#"../ShoppingCart/AddToCart.aspx?Id="+Eval("ProdID")%>'/>

Here is the request:

//receives the query string (as a string and converts to an int) sent by the selected item to be added to the cart          
int productID = Int32.Parse(Request.QueryString["ProdID"]);

Here is the URL displaying the correct ID being passed:

localhost:59200/ShoppingCart/AddToCart.aspx?Id=1

When I place a breakpoint to check the query string value, I claims to have the proper ID.Yet after all of that, I still get a null request. Can you not convert a request to a variable?

Kyle W · Accepted Answer · 2014-04-29 21:01:33Z

4

The name of your query string is "Id", not "ProdID" (which would be the name of the local variable).

answered Apr 29, 2014 at 21:01

Kyle W

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3 Comments

Eric J. Over a year ago

Not the name of the local variable but rather the name of the dictionary key for the QueryString dictionary.

Kyle W Over a year ago

Well, in the second code snippet, it's the dictionary key... but that's where it's wrong. The first code snippet, since it's in Eval, it would be the name of some sort of variable.

Kyle W Over a year ago

You bet. Make sure you mark an answer if your problem was solved.

MDiesel · Accepted Answer · 2014-04-29 21:03:43Z

0

//receives the query string (as a string and converts to an int) sent by the selected item to be added to the cart          
int productID = Int32.Parse(Request.QueryString["Id"]);

answered Apr 29, 2014 at 21:03

MDiesel

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1 Comment

WesW Over a year ago

Thanks for the help. That solved it. I had implemented another query string in my project in the very same way I asked my question about, but it functioned like it should have so when this one did not I was lost. i guess the first time was a bit of a fluke. Thanks again.

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