Question

    //FID is an array
     Response.Redirect("show.aspx?id=" + ID + "&name=" + NAME + "&fileid=" + FID+"&length="+j);


 //In show.aspx


 Label1.Text = Request.QueryString["fileid"].ToString();

I’m getting label text as System.String[]

Answer 1

I would suggest you to not pass an array in a query string as a parameter, but put it instead in a Session variable.

If you really want to pass in an array, then you can make it a comma separated string and then pass it in, then on the second page split that string

Edit: Check the above link and here is how you can do this..

    Session["fileid"] = FID; // set in session in first page
     //Accessing on Second page
    String[] FID;
    FID = (String[])Session["FID"];