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Views: 3207 | Replies: 1
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Join Date: May 2004
Posts: 1
Reputation: 
Rep Power: 0
Solved Threads: 0
Newbie Poster
I am doing this in Microsoft Visual Studio.NET as an ASP.Net Web Application.
I am new to .NET, and Am trying to learn, I just cant figure this out.
<html>
<head>
<title>Shopping Cart</title>
<script runat="server">
Dim objDT As System.Data.DataTable
Dim objDR As System.Data.DataRow
Private Sub Page_Load(s As Object, e As EventArgs)
If Not IsPostBack Then
makeCart()
End If
End Sub
Function makeCart()
objDT = New System.Data.DataTable("Cart")
objDT.Columns.Add("ID", GetType(Integer))
objDT.Columns("ID").AutoIncrement = True
objDT.Columns("ID").AutoIncrementSeed = 1
objDT.Columns.Add("Quantity", GetType(Integer))
objDT.Columns.Add("Product", GetType(String))
objDT.Columns.Add("Cost", GetType(Decimal))
Session("Cart") = objDT
End Function
Sub AddToCart(s As Object, e As EventArgs)
objDT = Session("Cart")
Dim Product = ddlProducts.SelectedItem.Text
Dim blnMatch As Boolean = False
For Each objDR In objDT.Rows
If objDR("Product") = Product Then
objDR("Quantity") += txtQuantity.Text
blnMatch = True
Exit For
End If
Next
If Not blnMatch Then
objDR = objDT.NewRow
objDR("Quantity") = txtQuantity.Text
objDR("Product") = ddlProducts.SelectedItem.Text
objDR("Cost") = Decimal.Parse(ddlProducts.SelectedItem.Value)
objDT.Rows.Add(objDR)
End If
Session("Cart") = objDT
dg.DataSource = objDT
dg.DataBind()
lblTotal.Text = "$" & GetItemTotal()
End Sub
Function GetItemTotal() As Decimal
Dim intCounter As Integer
Dim decRunningTotal As Decimal
For intCounter = 0 To objDT.Rows.Count - 1
objDR = objDT.Rows(intCounter)
decRunningTotal += (objDR("Cost") * objDR("Quantity"))
Next
Return decRunningTotal
End Function
Sub Delete_Item(s As Object, e As DataGridCommandEventArgs)
objDT = Session("Cart")
objDT.Rows(e.Item.ItemIndex).Delete()
Session("Cart") = objDT
dg.DataSource = objDT
dg.DataBind()
lblTotal.Text = "$" & GetItemTotal()
End Sub
</script>
</head>
<body>
<form runat="server">
Product:<br>
<asp:DropDownList id=ddlProducts runat="server">
<asp:ListItem Value="4.99">Socks</asp:ListItem>
<asp:ListItem Value="34.99">Pants</asp:ListItem>
<asp:ListItem Value="14.99">Shirt</asp:ListItem>
<asp:ListItem Value="12.99">Hat</asp:ListItem>
</asp:DropDownList><br>
Quantity:<br>
<asp:textbox id="txtQuantity" runat="server" /><br><br>
<asp:Button id=btnAdd runat="server" Text="Add To Cart" onClick="AddToCart" /><br><br>
<asp:DataGrid id=dg runat="server" ondeletecommand="Delete_Item">
<columns>
<asp:buttoncolumn buttontype="LinkButton" commandname="Delete" text="Remove Item" />
</columns>
</asp:DataGrid>
<br><br>
Total:
<asp:Label id=lblTotal runat="server" />
</form>
</body>
</html>
I am new to .NET, and Am trying to learn, I just cant figure this out.
<html>
<head>
<title>Shopping Cart</title>
<script runat="server">
Dim objDT As System.Data.DataTable
Dim objDR As System.Data.DataRow
Private Sub Page_Load(s As Object, e As EventArgs)
If Not IsPostBack Then
makeCart()
End If
End Sub
Function makeCart()
objDT = New System.Data.DataTable("Cart")
objDT.Columns.Add("ID", GetType(Integer))
objDT.Columns("ID").AutoIncrement = True
objDT.Columns("ID").AutoIncrementSeed = 1
objDT.Columns.Add("Quantity", GetType(Integer))
objDT.Columns.Add("Product", GetType(String))
objDT.Columns.Add("Cost", GetType(Decimal))
Session("Cart") = objDT
End Function
Sub AddToCart(s As Object, e As EventArgs)
objDT = Session("Cart")
Dim Product = ddlProducts.SelectedItem.Text
Dim blnMatch As Boolean = False
For Each objDR In objDT.Rows
If objDR("Product") = Product Then
objDR("Quantity") += txtQuantity.Text
blnMatch = True
Exit For
End If
Next
If Not blnMatch Then
objDR = objDT.NewRow
objDR("Quantity") = txtQuantity.Text
objDR("Product") = ddlProducts.SelectedItem.Text
objDR("Cost") = Decimal.Parse(ddlProducts.SelectedItem.Value)
objDT.Rows.Add(objDR)
End If
Session("Cart") = objDT
dg.DataSource = objDT
dg.DataBind()
lblTotal.Text = "$" & GetItemTotal()
End Sub
Function GetItemTotal() As Decimal
Dim intCounter As Integer
Dim decRunningTotal As Decimal
For intCounter = 0 To objDT.Rows.Count - 1
objDR = objDT.Rows(intCounter)
decRunningTotal += (objDR("Cost") * objDR("Quantity"))
Next
Return decRunningTotal
End Function
Sub Delete_Item(s As Object, e As DataGridCommandEventArgs)
objDT = Session("Cart")
objDT.Rows(e.Item.ItemIndex).Delete()
Session("Cart") = objDT
dg.DataSource = objDT
dg.DataBind()
lblTotal.Text = "$" & GetItemTotal()
End Sub
</script>
</head>
<body>
<form runat="server">
Product:<br>
<asp:DropDownList id=ddlProducts runat="server">
<asp:ListItem Value="4.99">Socks</asp:ListItem>
<asp:ListItem Value="34.99">Pants</asp:ListItem>
<asp:ListItem Value="14.99">Shirt</asp:ListItem>
<asp:ListItem Value="12.99">Hat</asp:ListItem>
</asp:DropDownList><br>
Quantity:<br>
<asp:textbox id="txtQuantity" runat="server" /><br><br>
<asp:Button id=btnAdd runat="server" Text="Add To Cart" onClick="AddToCart" /><br><br>
<asp:DataGrid id=dg runat="server" ondeletecommand="Delete_Item">
<columns>
<asp:buttoncolumn buttontype="LinkButton" commandname="Delete" text="Remove Item" />
</columns>
</asp:DataGrid>
<br><br>
Total:
<asp:Label id=lblTotal runat="server" />
</form>
</body>
</html>
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Join Date: Feb 2003
Location: Canada
Posts: 786
Reputation:
Rep Power: 9
Solved Threads: 25
Master Poster
Re: Newbie Needs Help with this ASPX •
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Originally Posted by dwhite02
I am doing this in Microsoft Visual Studio.NET as an ASP.Net Web Application.
I am new to .NET, and Am trying to learn, I just cant figure this out.
<html>
<head>
<title>Shopping Cart</title>
<script runat="server">
Dim objDT As System.Data.DataTable
Dim objDR As System.Data.DataRow
Private Sub Page_Load(s As Object, e As EventArgs)
If Not IsPostBack Then
makeCart()
End If
End Sub
Function makeCart()
objDT = New System.Data.DataTable("Cart")
objDT.Columns.Add("ID", GetType(Integer))
objDT.Columns("ID").AutoIncrement = True
objDT.Columns("ID").AutoIncrementSeed = 1
objDT.Columns.Add("Quantity", GetType(Integer))
objDT.Columns.Add("Product", GetType(String))
objDT.Columns.Add("Cost", GetType(Decimal))
Session("Cart") = objDT
End Function
Sub AddToCart(s As Object, e As EventArgs)
objDT = Session("Cart")
Dim Product = ddlProducts.SelectedItem.Text
Dim blnMatch As Boolean = False
For Each objDR In objDT.Rows
If objDR("Product") = Product Then
objDR("Quantity") += txtQuantity.Text
blnMatch = True
Exit For
End If
Next
If Not blnMatch Then
objDR = objDT.NewRow
objDR("Quantity") = txtQuantity.Text
objDR("Product") = ddlProducts.SelectedItem.Text
objDR("Cost") = Decimal.Parse(ddlProducts.SelectedItem.Value)
objDT.Rows.Add(objDR)
End If
Session("Cart") = objDT
dg.DataSource = objDT
dg.DataBind()
lblTotal.Text = "$" & GetItemTotal()
End Sub
Function GetItemTotal() As Decimal
Dim intCounter As Integer
Dim decRunningTotal As Decimal
For intCounter = 0 To objDT.Rows.Count - 1
objDR = objDT.Rows(intCounter)
decRunningTotal += (objDR("Cost") * objDR("Quantity"))
Next
Return decRunningTotal
End Function
Sub Delete_Item(s As Object, e As DataGridCommandEventArgs)
objDT = Session("Cart")
objDT.Rows(e.Item.ItemIndex).Delete()
Session("Cart") = objDT
dg.DataSource = objDT
dg.DataBind()
lblTotal.Text = "$" & GetItemTotal()
End Sub
</script>
</head>
<body>
<form runat="server">
Product:<br>
<aspropDownList id=ddlProducts runat="server">
<asp:ListItem Value="4.99">Socks</asp:ListItem>
<asp:ListItem Value="34.99">Pants</asp:ListItem>
<asp:ListItem Value="14.99">Shirt</asp:ListItem>
<asp:ListItem Value="12.99">Hat</asp:ListItem>
</asp
Quantity:<br>
<asp:textbox id="txtQuantity" runat="server" /><br><br>
<asp:Button id=btnAdd runat="server" Text="Add To Cart" onClick="AddToCart" /><br><br>
<asp
<columns>
<asp:buttoncolumn buttontype="LinkButton" commandname="Delete" text="Remove Item" />
</columns>
</asp
<br><br>
Total:
<asp:Label id=lblTotal runat="server" />
</form>
</body>
</html>
Umm... that is all fine and dandy....but what are you trying to do, and what exactly is it that you can't figure out? Point us in the direction of your problem.
Thanks
Assistant Manager, Regional Pharmacy Information Systems
TLC Services Website (Under Construction)
Updated : ASP.Net Login Code
TLC Services Website (Under Construction)
Updated : ASP.Net Login Code
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