Create Shopping Cart with Cookies using C# and VB.Net in ASP.Net

Hi upendra,

Check this example. Now please take its reference and correct your code.

HTML

Product

<asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="false">
    <Columns>
        <asp:BoundField DataField="ProductID" HeaderText="Id" />
        <asp:BoundField DataField="ProductName" HeaderText="Name" />
        <asp:BoundField DataField="Description" HeaderText="Description" />
        <asp:BoundField DataField="Price" HeaderText="Price" />
        <asp:BoundField DataField="Quantity" HeaderText="Quantity" />
        <asp:TemplateField>
            <ItemTemplate>
                <asp:Button Text="Add To Cart" runat="server" OnClick="OnAddCart" />
            </ItemTemplate>
        </asp:TemplateField>
    </Columns>
</asp:GridView>
<br />
<asp:Button Text="View Cart" runat="server" OnClick="OnViewCart" />
<asp:Button Text="Clear Cart" runat="server" OnClick="OnClearCart" />

ViewCart

<asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="false">
    <Columns>
        <asp:BoundField DataField="ProductName" HeaderText="Name" />
        <asp:BoundField DataField="Description" HeaderText="Description" />
        <asp:BoundField DataField="Price" HeaderText="Price" />
        <asp:BoundField DataField="Quantity" HeaderText="Quantity" />
    </Columns>
</asp:GridView>

Namespaces

C#

using System.Data;

VB.Net

Imports System.Data

Code

Product

C#

protected void Page_Load(object sender, EventArgs e)
{
    if (!this.IsPostBack)
    {
        DataTable dt = new DataTable();
        dt.Columns.AddRange(new DataColumn[] {
                new DataColumn("ProductId"),
                new DataColumn("ProductName"),
                new DataColumn("Description"),
                new DataColumn("Price"),
                new DataColumn("Quantity") });
        dt.Rows.Add(1, "Chai", "Soft drinks, coffees, teas, beers, and ales", "18.00", "10 boxes x 20 bags");
        dt.Rows.Add(2, "Aniseed Syrup", "Sweet and savory sauces", "10.00", "12 - 550 ml bottles");
        dt.Rows.Add(3, "Pavlova", "Desserts, candies, and sweet breads", "17.45", "32 - 500 g boxes");
        dt.Rows.Add(4, "Filo Mix", "Breads, crackers, pasta, and cereal", "7.00", "16 - 2 kg boxes");
        GridView1.DataSource = dt;
        GridView1.DataBind();
    }
}

protected void OnAddCart(object sender, EventArgs e)
{
    GridViewRow row = (sender as Button).NamingContainer as GridViewRow;
    string name = row.Cells[1].Text.Trim();
    string description = row.Cells[2].Text.Trim();
    string price = row.Cells[3].Text.Trim();
    string quantity = row.Cells[4].Text.Trim();

    HttpCookie cookie = new HttpCookie("ut");
    if (Request.Cookies["ut"] == null)
    {
        cookie.Values["ut"] = name + "|" + description + "|" + price + "|" + quantity;
        cookie.Expires = DateTime.Now.AddDays(1);
    }
    else
    {
        cookie.Values["ut"] = Request.Cookies["ut"].Value + Environment.NewLine
                                + name + "|" + description + "|" + price + "|" + quantity;
        cookie.Expires = DateTime.Now.AddDays(1);
    }

    Response.Cookies.Add(cookie);
}

protected void OnViewCart(object sender, EventArgs e)
{
    Response.Redirect("~/ViewCart.aspx");
}

protected void OnClearCart(object sender, EventArgs e)
{
    if (Request.Cookies["ut"] != null)
    {
        HttpCookie cookie = Request.Cookies["ut"];
        cookie.Expires = DateTime.Now.AddDays(-1);
        Response.Cookies.Add(cookie);
    }
}

VB.Net

Protected Sub Page_Load(ByVal sender As Object, ByVal e As EventArgs) Handles Me.Load
    If Not Me.IsPostBack Then
        Dim dt As DataTable = New DataTable()
        dt.Columns.AddRange(New DataColumn() {
                            New DataColumn("ProductId"),
                            New DataColumn("ProductName"),
                            New DataColumn("Description"),
                            New DataColumn("Price"),
                            New DataColumn("Quantity")})
        dt.Rows.Add(1, "Chai", "Soft drinks, coffees, teas, beers, and ales", "18.00", "10 boxes x 20 bags")
        dt.Rows.Add(2, "Aniseed Syrup", "Sweet and savory sauces", "10.00", "12 - 550 ml bottles")
        dt.Rows.Add(3, "Pavlova", "Desserts, candies, and sweet breads", "17.45", "32 - 500 g boxes")
        dt.Rows.Add(4, "Filo Mix", "Breads, crackers, pasta, and cereal", "7.00", "16 - 2 kg boxes")
        GridView1.DataSource = dt
        GridView1.DataBind()
    End If
End Sub

Protected Sub OnAddCart(ByVal sender As Object, ByVal e As EventArgs)
    Dim row As GridViewRow = TryCast((TryCast(sender, Button)).NamingContainer, GridViewRow)
    Dim name As String = row.Cells(1).Text.Trim()
    Dim description As String = row.Cells(2).Text.Trim()
    Dim price As String = row.Cells(3).Text.Trim()
    Dim quantity As String = row.Cells(4).Text.Trim()
    Dim cookie As HttpCookie = New HttpCookie("ut")

    If Request.Cookies("ut") Is Nothing Then
        cookie.Values("ut") = name & "|" & description & "|" & price & "|" & quantity
        cookie.Expires = DateTime.Now.AddDays(1)
    Else
        cookie.Values("ut") = Request.Cookies("ut").Value & Environment.NewLine _
                            & name & "|" & description & "|" & price & "|" & quantity
        cookie.Expires = DateTime.Now.AddDays(1)
    End If

    Response.Cookies.Add(cookie)
End Sub

Protected Sub OnViewCart(ByVal sender As Object, ByVal e As EventArgs)
    Response.Redirect("~/ViewCart.aspx")
End Sub

Protected Sub OnClearCart(ByVal sender As Object, ByVal e As EventArgs)
    If Request.Cookies("ut") IsNot Nothing Then
        Dim cookie As HttpCookie = Request.Cookies("ut")
        cookie.Expires = DateTime.Now.AddDays(-1)
        Response.Cookies.Add(cookie)
    End If
End Sub

ViewCart

C#

protected void Page_Load(object sender, EventArgs e)
{
    DataTable dt = new DataTable();
    dt.Columns.AddRange(new DataColumn[] {
                new DataColumn("ProductName"),
                new DataColumn("Description"),
                new DataColumn("Price"),
                new DataColumn("Quantity") });

    if (Request.Cookies["ut"] != null)
    {
        string products = Request.Cookies["ut"].Value.Replace("ut=", "");
        string[] strarr = HttpUtility.UrlDecode(products).Split('\n');

        for (int i = 0; i < strarr.Length; i++)
        {
            string[] strarr1 = strarr[i].Split('|');
            dt.Rows.Add(strarr1[0].Trim(), strarr1[1].Trim(), strarr1[2].Trim(), strarr1[3].Trim());
        }
    }
    GridView1.DataSource = dt;
    GridView1.DataBind();
}

VB.Net

Protected Sub Page_Load(ByVal sender As Object, ByVal e As EventArgs) Handles Me.Load
    Dim dt As DataTable = New DataTable()
    dt.Columns.AddRange(New DataColumn() {
                        New DataColumn("ProductName"),
                        New DataColumn("Description"),
                        New DataColumn("Price"),
                        New DataColumn("Quantity")})

    If Request.Cookies("ut") IsNot Nothing Then
        Dim products As String = Request.Cookies("ut").Value.Replace("ut=", "")
        Dim strarr As String() = HttpUtility.UrlDecode(products).Split(vbLf)
        For i As Integer = 0 To strarr.Length - 1
            Dim strarr1 As String() = strarr(i).Split("|"c)
            dt.Rows.Add(strarr1(0).Trim(), strarr1(1).Trim(), strarr1(2).Trim(), strarr1(3).Trim())
        Next
    End If

    GridView1.DataSource = dt
    GridView1.DataBind()
End Sub

Screenshot