Store multiple Product details in Cookies using C# in ASP.Net

i dont have any example for this but like in flipkart when product click and add to cart it will go inside the cart without login 

when i select another product is also go inside the cart so i want to do that using cookies

Hi itsjayshah,

I will get back to you tomorrow.

Hi itsjayshah,

I have created sample that full-fill your requirement.

So you need to change the code as per your requirement.

HTML

<asp:GridView runat="server" ID="gvprodet" AutoGenerateColumns="false">
    <Columns>
        <asp:BoundField DataField="product_id" HeaderText="" />
        <asp:BoundField DataField="Size" HeaderText="Size" />
        <asp:BoundField DataField="Color" HeaderText="Color" />
        <asp:BoundField DataField="Quantity" HeaderText="Quantity" />
        <asp:TemplateField HeaderText="Action">
            <ItemTemplate>
                <asp:Button Text="Save" runat="server" OnClick="Save" />
            </ItemTemplate>
        </asp:TemplateField>
    </Columns>
</asp:GridView>
<br />
<asp:Label ID="lblCookieValue" runat="server" />

C#

protected void Page_Load(object sender, EventArgs e)
{
    if (!this.IsPostBack)
    {
        DataTable dtprodet = new DataTable();
        dtprodet.Columns.AddRange(new DataColumn[4] { 
            new DataColumn("product_id", typeof(int)), new DataColumn("Size", typeof(int)),                            
            new DataColumn("Color",typeof(string)),new DataColumn("Quantity", typeof(int))  });
        dtprodet.Rows.Add(1, 6, "Red", 10);
        dtprodet.Rows.Add(2, 7, "Blue", 5);
        dtprodet.Rows.Add(3, 8, "Orange", 8);
        dtprodet.Rows.Add(4, 9, "Green", 3);
        gvprodet.DataSource = dtprodet;
        gvprodet.DataBind();
    }
}

protected void Save(object sender, EventArgs e)
{
    Button btn = sender as Button;
    GridViewRow row = btn.NamingContainer as GridViewRow;
    string product_id = row.Cells[0].Text.Trim();
    string size = row.Cells[1].Text.Trim();
    string color = row.Cells[2].Text.Trim();
    string quantity = row.Cells[3].Text.Trim();
    if (Request.Cookies["prodet"] != null)
    {
        Response.Cookies["prodet"]["product_id"] = Request.Cookies["prodet"]["product_id"] += "," + product_id;
        Response.Cookies["prodet"]["Size"] = Request.Cookies["prodet"]["Size"] += "," + size;
        Response.Cookies["prodet"]["Color"] = Request.Cookies["prodet"]["Color"] += "," + color;
        Response.Cookies["prodet"]["Quantity"] = Request.Cookies["prodet"]["Quantity"] += "," + quantity;
        Response.Cookies["prodet"].Expires = DateTime.Now.AddDays(1);
        lblCookieValue.Text = Request.Cookies["prodet"].Value;
    }
    else
    {
        Response.Cookies["prodet"]["product_id"] = product_id;
        Response.Cookies["prodet"]["Size"] = size;
        Response.Cookies["prodet"]["Color"] = color;
        Response.Cookies["prodet"]["Quantity"] = quantity;
        Response.Cookies["prodet"].Expires = DateTime.Now.AddDays(1);
        lblCookieValue.Text = Request.Cookies["prodet"].Value;
    }
}

Screenshot