Passing List<T> as query string

asp.net

Solution

I think you can do this. But if is a list comming from the database better call the function again on the revising page. Otherwise you have to do a dirty solution like this:

List<string> ls=new List<string>{"Sweden","USA"};
Response.Redirect("page.aspx?CountryList="+string.Join(",",ls));

And on the revising page do this:

List<string> ls= QueryString["CountryList"].Split(',').ToList();

But remember there is a limit on how large querystring you can send. So if the list contains many items then you can might reach that upper bound.

or store it in session:

Session["CountryList"]=ls;

And then on the revising page. Do this:

List<string> ls=(List<string>)Session["CountryList"];
Session.Remove("CountryList");

Remember to `remove` the `session` when you are done with it. So you do not have dirty values in the `session`

Problem

I have a List having country names in the list. And this list needs to be sent as one of the parameters in Response.Redirect(page). Is there a straight forward way to do this, so that in the recieving page, I can type cast the query string to List and use it. Thanks, Sriram

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