Why is this small program not working


T

Tony

Hello!

I use VS 2010 professional. I try to enter an example from a book that I
read but it doesn't work.
I have created a VB project and enter the code below in an aspx file.

The text say "To try this page out, open a browser and type in the URL,
appending the query string
?quantity=5&itemid=Item&unitPrice=54.
Nothing happen but according to the book it should display the following
<updateTotalRespone>
<discount>10 </discount>
<extPrice>243 </extPrice>
</updateTotalRespone>

I try to use the built in web server in Visual Studio.

So what is it that I have missed here ?


%@ Page Language="VB" AutoEventWireup="false"
CodeFile="updateTotal1.aspx.vb" Inherits="_Default" %>

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

<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title></title>
</head>
<body>
<script langauge="VB" runat="server">
Sub Page_Load(Src As Object, E As EventArgs)
Response.ContentType = "text/xml"
Dim quantity, unitPrice
Dim discount, extPrice

On Error Resume Next

quantity = Request.QueryString.Item("quantity")
unitPrice = Request.QueryString.Item("unitPrice")

discount = QuantityDiscount(quantity)
extPrice = (CDbl(quantity) * CDbl(unitPrice)) * (1 - (discount /
100))

If Err.Number <> 0 Then
Response.Write(ErrorXML())
Else
Response.Write(SuccessXML(discount, extPrice))
End If
End Sub

Function QuantityDiscount(quantity)
'For the sake of the example, just return a fixed amount
QuantityDiscount = 10
End Function

Function ErrorXML()
Dim sXML
sXML = "<Error><Reason>Invalid numbers </Reason></Error>"
ErrorXML = sXML
End Function

Function SuccessXML(sDiscount, sExtprice)
Dim sXML

sXML = "<updateTotalResponse>" & vbNewLine
sXML = sXML & " <discount>" & sDiscount & "</discount>" &
vbNewLine
sXML = sXML & " <extPrice>" & sExtprice & "</extPrice>" &
vbNewLine
sXML = sXML & " </updateTotalResponse>"
SuccessXML = sXML
End Function

</script>
</body>
</html>

//Tony
 
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J

Jason Keats

Tony said:
Hello!

I use VS 2010 professional. I try to enter an example from a book that I
read but it doesn't work.
I have created a VB project and enter the code below in an aspx file.

The text say "To try this page out, open a browser and type in the URL,
appending the query string
?quantity=5&itemid=Item&unitPrice=54.
Nothing happen but according to the book it should display the following
<updateTotalRespone>
<discount>10 </discount>
<extPrice>243 </extPrice>
</updateTotalRespone>

I try to use the built in web server in Visual Studio.

So what is it that I have missed here ?


%@ Page Language="VB" AutoEventWireup="false"
CodeFile="updateTotal1.aspx.vb" Inherits="_Default" %>

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

<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title></title>
</head>
<body>
<script langauge="VB" runat="server">
Sub Page_Load(Src As Object, E As EventArgs)
Response.ContentType = "text/xml"
Dim quantity, unitPrice
Dim discount, extPrice

On Error Resume Next

quantity = Request.QueryString.Item("quantity")
unitPrice = Request.QueryString.Item("unitPrice")

discount = QuantityDiscount(quantity)
extPrice = (CDbl(quantity) * CDbl(unitPrice)) * (1 - (discount / 100))

If Err.Number <> 0 Then
Response.Write(ErrorXML())
Else
Response.Write(SuccessXML(discount, extPrice))
End If
End Sub

Function QuantityDiscount(quantity)
'For the sake of the example, just return a fixed amount
QuantityDiscount = 10
End Function

Function ErrorXML()
Dim sXML
sXML = "<Error><Reason>Invalid numbers </Reason></Error>"
ErrorXML = sXML
End Function

Function SuccessXML(sDiscount, sExtprice)
Dim sXML

sXML = "<updateTotalResponse>" & vbNewLine
sXML = sXML & " <discount>" & sDiscount & "</discount>" & vbNewLine
sXML = sXML & " <extPrice>" & sExtprice & "</extPrice>" & vbNewLine
sXML = sXML & " </updateTotalResponse>"
SuccessXML = sXML
End Function

</script>
</body>
</html>

//Tony

You have a couple of choices. Either delete everything above <script
langauge="VB" runat="server"> and everything below </script>, or move
the contents of the script block into code behind.
 
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J

Jason Keats

Jason said:
You have a couple of choices. Either delete everything above <script
langauge="VB" runat="server"> and everything below </script>, or move
the contents of the script block into code behind.

Actually, I'm not sure the second option will work. I know the first one
does.
 

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