Shopping Cart in ASP.net using C#

Preview:

Hello Everybody,

Here I am sharing you a shopping cart example with source code. Have a try on that, and let me know your feedback on same.

.aspx code:

<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Cart.aspx.cs" Inherits="Cart" %>

DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<title>Shopping Carttitle>

SCRIPT>

head>

<body>

<div>

Item:

<asp:DropDownList ID="ddlItems" runat="server">

<asp:ListItem Value="Coke">Cokeasp:ListItem>

<asp:ListItem Value="7Up">7Upasp:ListItem>

<asp:ListItem Value="Mirinda">Mirindaasp:ListItem>

asp:DropDownList> <br />

Price:

<asp:TextBox ID="txtPrice" onkeypress="return isNumberKey(event)" runat="server">asp:TextBox><br />

Quantity:

<asp:TextBox ID="txtQuantity" onkeypress="return isNumberKey(event)" runat="server">asp:TextBox><br />

<asp:Button ID="btnAdd" runat="server" Text="Add to cart" onclick="btnAdd_Click"/>

<asp:GridView ID="gvCart" runat="server" DataKeyNames="Productid" AutoGenerateColumns="False"

ShowFooter="True"

onrowediting="gvCart_RowEditing" onrowupdating="gvCart_RowUpdating"

onrowdeleting="gvCart_RowDeleting" onrowdatabound="gvCart_RowDataBound">

<asp:BoundField DataField="Productid" HeaderText="Product Id" />

<asp:BoundField DataField="ProductName" HeaderText="Product Name" />

<asp:TemplateField HeaderText="Unit Price" FooterStyle-Font-Bold="True">

<asp:Label ID="lblUnitPrice" runat="server" Text='<%#Eval("UnitPrice")%>'>asp:Label>

ItemTemplate>

<FooterStyle Font-Bold="True">FooterStyle>

asp:TemplateField>

<asp:TemplateField HeaderText="Quantity" ItemStyle-HorizontalAlign="Center">

<asp:TextBox ID="txtQuantity" runat="server" onkeypress="return isNumberKey(event)" Width="30" Text='<%#Eval("Quantity") %>'>asp:TextBox>

ItemTemplate>

asp:TemplateField>

<asp:TemplateField HeaderText="Total" FooterStyle-Font-Bold="True">

<asp:Label ID="lblTotalPrice" runat="server" Text='<%#Eval("TotalPrice")%>' >asp:Label>

ItemTemplate>

<asp:Label ID="lblSubTotal" runat="server" >asp:Label>

FooterTemplate>

<FooterStyle Font-Bold="True">FooterStyle>

asp:TemplateField>

<asp:TemplateField>

<asp:LinkButton ID="lnkUpdate" runat="server" CommandName="Update" Text="Update">asp:LinkButton>

ItemTemplate>

asp:TemplateField>

<asp:TemplateField>

<asp:LinkButton ID="lnkDelete" runat="server" CommandName="Delete" OnClientClick="javascript:return confirm('Are you sure want to delete record?');" Text="Delete">asp:LinkButton>

ItemTemplate>

asp:TemplateField>

Columns>

asp:GridView>

div>

form>

body>

html>

.asps.cs code:

using System;

using System.Collections;

using System.Configuration;

using System.Data;

using System.Linq;

using System.Web;

using System.Web.Security;

using System.Web.UI;

using System.Web.UI.HtmlControls;

using System.Web.UI.WebControls;

using System.Web.UI.WebControls.WebParts;

using System.Xml.Linq;

public partial class Cart : System.Web.UI.Page

{

protected decimal TotalAmt;

DataTable dt = new DataTable();

DataRow dr;

protected void Page_Load(object sender, EventArgs e)

{

if (!IsPostBack)

{

}

protected void btnAdd_Click(object sender, EventArgs e)

{

BindCart();

}

protected void gvCart_RowEditing(object sender, GridViewEditEventArgs e)

{

gvCart.EditIndex = e.NewEditIndex;

gvCart.Rows[e.NewEditIndex].Cells[1].Enabled = false;

BindCart();

}

protected void BindCart()

{

if (ViewState["myCart"] == null)

{

dt.Columns.Add("Productid", System.Type.GetType("System.Int32"));

dt.Columns.Add("ProductName");

dt.Columns.Add("UnitPrice", System.Type.GetType("System.Decimal"));

dt.Columns.Add("Quantity", System.Type.GetType("System.Int32"));

dt.Columns.Add("TotalPrice", System.Type.GetType("System.Decimal"));

dt.Columns.Add("SubTotal", System.Type.GetType("System.Decimal"));

dr = dt.NewRow();

dr[0] = dt.Rows.Count + 1;

dr[1] = ddlItems.SelectedItem.Text;

dr[2] = txtPrice.Text;

dr[3] = txtQuantity.Text;

dr[4] = Convert.ToDecimal(txtPrice.Text) * Convert.ToDecimal(txtQuantity.Text);

dt.Rows.Add(dr);

}

else

{

dt = (DataTable)ViewState["myCart"];

dr = dt.NewRow();

dr[0] = dt.Rows.Count + 1;

dr[1] = ddlItems.SelectedItem.Text;

dr[2] = txtPrice.Text;

dr[3] = txtQuantity.Text;

dr[4] = Convert.ToDecimal(txtPrice.Text) * Convert.ToDecimal(txtQuantity.Text);

dt.Rows.Add(dr);

}

ViewState["myCart"] = dt;

gvCart.DataSource = dt;

gvCart.DataBind();

}

protected void gvCart_RowUpdating(object sender, GridViewUpdateEventArgs e)

{

dt = (DataTable)ViewState["myCart"];

TextBox txtQty = (TextBox)gvCart.Rows[e.RowIndex].FindControl("txtQuantity");

Label lblUnitPrice = (Label)gvCart.Rows[e.RowIndex].FindControl("lblUnitPrice");

decimal unitPrice = Convert.ToDecimal(lblUnitPrice.Text);

dt.Rows[e.RowIndex].BeginEdit();

dt.Rows[e.RowIndex]["Quantity"] = txtQty.Text;

dt.Rows[e.RowIndex]["TotalPrice"] = Convert.ToDecimal(txtQty.Text) * unitPrice;

dt.Rows[e.RowIndex].EndEdit();

gvCart.DataSource = dt;

gvCart.DataBind();

}

protected void gvCart_RowDeleting(object sender, GridViewDeleteEventArgs e)

{

dt = (DataTable)ViewState["myCart"];

dt.Rows[e.RowIndex].Delete();

gvCart.DataSource = dt;

gvCart.DataBind();

}

protected void gvCart_RowDataBound(object sender, GridViewRowEventArgs e)

{

if (e.Row.RowType == DataControlRowType.DataRow)

{

TotalAmt += Convert.ToDecimal(DataBinder.Eval(e.Row.DataItem, "TotalPrice"));

}

if (e.Row.RowType == DataControlRowType.Footer)

{

Label lblSubTotal = (Label)e.Row.FindControl("lblSubTotal");

lblSubTotal.Text = TotalAmt.ToString();

}

I hope you will enjoy. Please share your view/ comments to make this blog more reliable...

Thanks you again.

The Ved Blog

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Shopping Cart in ASP.net using C#

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