hi,
i have developed an web-enabled database application using ASp.net, C# and sql server 2000.
now i want to implement transaction controls over the same
can anyone plz help me in implementing the same?
thanks in advance
Transaction comes in three part code, the shopping cart, the C# transaction and the stored procs. I would look at the Commerce starter kit but buy Programming .NET by Jeff Prosise it has all the C# code including Session state management. Hope this helps.|||
Hi,
thanx for the suggestion. but i cant find that book over here. Is there any better tutorial whichs online and gives the information abt transactions?
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This is the code from the book and I also added link to the Commerce Starter kit it is in VB but you could use that to understand the C# code. Hope this helps.
Congo.aspx
<%@. Import Namespace="System.Data" %>
<%@. Import Namespace="System.Data.SqlClient" %>
<html>
<body>
<h1>Congo.com</h1>
<form runat="server">
<table width="100%" bgcolor="teal">
<tr>
<td>
<asp:Button Text="View Cart" OnClick="OnViewCart"
RunAt="server" />
</td>
</tr>
</table>
<br>
<center>
<asp:DataGrid ID="MyDataGrid"
AutoGenerateColumns="false" CellPadding="2"
BorderWidth="1" BorderColor="lightgray"
Font-Name="Verdana" Font-Size="8pt"
GridLines="vertical" Width="90%"
OnItemCommand="OnItemCommand" RunAt="server">
<Columns>
<asp:BoundColumn HeaderText="Item ID"
DataField="title_id" />
<asp:BoundColumn HeaderText="Title"
DataField="title" />
<asp:BoundColumn HeaderText="Price"
DataField="price" DataFormatString="{0:c}"
HeaderStyle-HorizontalAlign="center"
ItemStyle-HorizontalAlign="right" />
<asp:ButtonColumn HeaderText="Action" Text="Add to Cart"
HeaderStyle-HorizontalAlign="center"
ItemStyle-HorizontalAlign="center"
CommandName="AddToCart" />
</Columns>
<HeaderStyle BackColor="teal" ForeColor="white"
Font-Bold="true" />
<ItemStyle BackColor="white" ForeColor="darkblue" />
<AlternatingItemStyle BackColor="beige"
ForeColor="darkblue" />
</asp:DataGrid>
</center>
</form>
</body>
</html>
<script language="C#" runat="server">
void Page_Load (Object sender, EventArgs e)
{
if (!IsPostBack) {
string ConnectString =
ConfigurationSettings.AppSettings["connectString"];
SqlDataAdapter adapter = new SqlDataAdapter
("select * from titles where price != 0", ConnectString);
DataSet ds = new DataSet ();
adapter.Fill (ds);
MyDataGrid.DataSource = ds;
MyDataGrid.DataBind ();
}
}
void OnItemCommand (Object sender, DataGridCommandEventArgs e)
{
if (e.CommandName == "AddToCart") {
BookOrder order = new BookOrder (e.Item.Cells[0].Text,
e.Item.Cells[1].Text, Convert.ToDecimal
(e.Item.Cells[2].Text.Substring (1)), 1);
ShoppingCart cart = (ShoppingCart) Session["MyShoppingCart"];
if (cart != null)
cart.AddOrder (order);
}
}
void OnViewCart (Object sender, EventArgs e)
{
Response.Redirect ("ViewCart.aspx");
}
</script>
ViewCart.aspx
<html>
<body>
<h1>Shopping Cart</h1>
<form runat="server">
<table width="100%" bgcolor="teal">
<tr>
<td>
<asp:Button Text="Return to Shopping" OnClick="OnShop"
RunAt="server" />
</td>
</tr>
</table>
<br>
<center>
<asp:DataGrid ID="MyDataGrid"
AutoGenerateColumns="false" CellPadding="2"
BorderWidth="1" BorderColor="lightgray"
Font-Name="Verdana" Font-Size="8pt"
GridLines="vertical" Width="90%"
OnItemCommand="OnItemCommand" RunAt="server">
<Columns>
<asp:BoundColumn HeaderText="Item ID"
DataField="ItemID" />
<asp:BoundColumn HeaderText="Title"
DataField="Title" />
<asp:BoundColumn HeaderText="Price"
DataField="Price" DataFormatString="{0:c}"
HeaderStyle-HorizontalAlign="center"
ItemStyle-HorizontalAlign="right" />
<asp:BoundColumn HeaderText="Quantity"
DataField="Quantity"
HeaderStyle-HorizontalAlign="center"
ItemStyle-HorizontalAlign="center" />
<asp:ButtonColumn HeaderText="Action" Text="Remove"
HeaderStyle-HorizontalAlign="center"
ItemStyle-HorizontalAlign="center"
CommandName="RemoveFromCart" />
</Columns>
<HeaderStyle BackColor="teal" ForeColor="white"
Font-Bold="true" />
<ItemStyle BackColor="white" ForeColor="darkblue" />
<AlternatingItemStyle BackColor="beige"
ForeColor="darkblue" />
</asp:DataGrid>
</center>
<h3><asp:Label ID= "Total" RunAt="server" /></h3>
</form>
</body>
</html>
<script language="C#" runat="server">
void Page_Load (Object sender, EventArgs e)
{
ShoppingCart cart = (ShoppingCart) Session["MyShoppingCart"];
if (cart != null) {
MyDataGrid.DataSource = cart.Orders;
MyDataGrid.DataBind ();
Total.Text = String.Format ("Total Cost: {0:c}",
cart.TotalCost);
}
}
void OnItemCommand (Object sender, DataGridCommandEventArgs e)
{
if (e.CommandName == "RemoveFromCart") {
ShoppingCart cart = (ShoppingCart) Session["MyShoppingCart"];
if (cart != null) {
cart.RemoveOrder (e.Item.Cells[0].Text);
MyDataGrid.DataBind ();
Total.Text = String.Format ("Total Cost: {0:c}",
cart.TotalCost);
}
}
}
public void OnShop (Object sender, EventArgs e)
{
Response.Redirect ("Congo.aspx");
}
</script>
Congo.cs
using System;
using System.Collections;
[Serializable]
public class BookOrder
{
string _ItemID;
string _Title;
decimal _Price;
int _Quantity;
public string ItemID
{
get { return _ItemID; }
set { _ItemID = value; }
}
public string Title
{
get { return _Title; }
set { _Title = value; }
}
public decimal Price
{
get { return _Price; }
set { _Price = value; }
}
public int Quantity
{
get { return _Quantity; }
set { _Quantity = value; }
}
public BookOrder (string ItemID, string Title, decimal Price,
int Quantity)
{
_ItemID = ItemID;
_Title = Title;
_Price = Price;
_Quantity = Quantity;
}
}
[Serializable]
public class ShoppingCart
{
Hashtable _Orders = new Hashtable ();
public ICollection Orders
{
get { return _Orders.Values; }
}
public decimal TotalCost
{
get
{
decimal total = 0;
foreach (DictionaryEntry entry in _Orders) {
BookOrder order = (BookOrder) entry.Value;
total += (order.Price * order.Quantity);
}
return total;
}
}
public void AddOrder (BookOrder Order)
{
BookOrder order = (BookOrder) _Orders[Order.ItemID];
if (order != null)
order.Quantity += Order.Quantity;
else
_Orders.Add (Order.ItemID, Order);
}
public void RemoveOrder (string ItemID)
{
if (_Orders[ItemID] != null)
_Orders.Remove (ItemID);
}
}
http://asp.net/CommerceStarterKit/docs/docs.htm
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It's not a book. "Starter Kit"
http://asp.net/Default.aspx?tabindex=8&tabid=47
