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Join Date: Feb 2008
Posts: 8
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Im getting a NullReferenceException when I goto add a product to my cart, i get the error when i come to this part
I use extremely similar code in another one of my projects and do not come across this problem, I have also researched it for a while and still came across no soltuion.
Any help is appreciated!
cart.AddProduct(productnumber, name, price, prodQty, knobColor, finishColor)
I use extremely similar code in another one of my projects and do not come across this problem, I have also researched it for a while and still came across no soltuion.
Protected Sub btnAdd_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnAdd.Click
Dim cart As New Cart
cart = Session("Cart")
Dim flag As Integer = 1
Dim finishColor As String = ""
Dim knobColor As String = ""
Dim prodQty As Integer = 0
Dim price As Decimal = 0
Dim name As String = ""
Dim productnumber As Integer = 0
If txtQty.Text <> "" And IsNumeric(txtQty.Text) Then
prodQty = txtQty.Text
flag = 0
Else
lblError.Text = "Please enter a numeric quantity."
Return
End If
productnumber = prodID
name = lblName.Text
price = lblPrice.Text
prodQty = txtQty.Text
finishColor = DDFinish.SelectedItem.Text
knobColor = DDKnob.SelectedItem.Text
cart.AddProduct(productnumber, name, price, prodQty, knobColor, finishColor)
Session("Cart") = cart•
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Join Date: Apr 2008
Posts: 3
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Session("Cart") is not initialized yet. So make sure You need to check Session("Cart") with null(nothing) and assign it properly. You need to do something like this.
Dim cart As New Cart
cart = Session("Cart")
if (cart == Nothing)
cart = new cart();
then use cart object. you won't get this type of error.
Dim cart As New Cart
cart = Session("Cart")
if (cart == Nothing)
cart = new cart();
then use cart object. you won't get this type of error.
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Im getting a NullReferenceException when I goto add a product to my cart, i get the error when i come to this part
cart.AddProduct(productnumber, name, price, prodQty, knobColor, finishColor)
I use extremely similar code in another one of my projects and do not come across this problem, I have also researched it for a while and still came across no soltuion.
Any help is appreciated!Protected Sub btnAdd_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnAdd.Click Dim cart As New Cart cart = Session("Cart") Dim flag As Integer = 1 Dim finishColor As String = "" Dim knobColor As String = "" Dim prodQty As Integer = 0 Dim price As Decimal = 0 Dim name As String = "" Dim productnumber As Integer = 0 If txtQty.Text <> "" And IsNumeric(txtQty.Text) Then prodQty = txtQty.Text flag = 0 Else lblError.Text = "Please enter a numeric quantity." Return End If productnumber = prodID name = lblName.Text price = lblPrice.Text prodQty = txtQty.Text finishColor = DDFinish.SelectedItem.Text knobColor = DDKnob.SelectedItem.Text cart.AddProduct(productnumber, name, price, prodQty, knobColor, finishColor) Session("Cart") = cart
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