CODEWITHSUNDEEP
c#asp.netsessioncheckbox
user3070072
user3070072

Reputation: 620

How to call data from session variable?

I trying to read a data from a particular session variables called 'cart'. However, when i execute the method below, the output string is the following System.Collections.Generic.List1[System.String]`, instead my desire goal is retrieve the product id data value (session 'cart'). 

   protected void AddToCart_Click(object sender, EventArgs e)
    {
        var selectedProducts = GridView1.Rows.Cast<GridViewRow>()
          .Where(row => ((CheckBox)row.FindControl("SelectedProducts")).Checked)
          .Select(row => GridView1.DataKeys[row.RowIndex].Value.ToString()).ToList();
        if (Session["Cart"] == null)
        {
            Session["Cart"] = selectedProducts;

        }
        else
        {
            List<String> cart = new List<String>();
            cart = (List<string>)Session["Cart"];

            foreach (var product in selectedProducts)
                cart.Add(product);
            Session["Cart"] = cart;
        }
        foreach (GridViewRow row in GridView1.Rows)
        {
            CheckBox cb = (CheckBox)row.FindControl("SelectedProducts");
            if (cb.Checked)
                cb.Checked = true;

                {

                   // string data = (string)Session["Cart"];
                    List<string> cart = (List<string>)Session["Cart"];
                    Label1.Text = cart.ToString();
                }              
        }
    }

Any further advice, as to where I may be going wrong, would be most appreciated.
Many thanks.

Upvotes: 0

Views: 132

Answers (1)

Oskar Lindberg
Oskar Lindberg

Reputation: 2294

List<T>.ToString() has the following default implementation:

public virtual String ToString()
{
    return GetType().ToString();
}

You need to provide your own implementation by overriding that (in a derived class, of course) if you want to use ToString() in the manner you describe.

Edit: Assuming you don't have to use ToString() there are several other options. Using Linq you can aggregate the list like so:

cart.Aggregate(String.Empty, (a, b) => a + ", " + b);

Or you can turn it into an Array and use String.Join() (as Rick suggests), or you can implement an extension method for IEnumerable<String> or whatever suits your purposes.

Upvotes: 1

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