Private Sub addnewitem()
Dim nowTable As DataTable = New DataTable("nowCartTable")
nowTable = Session("myCartTable")
Dim data As DataSet
With New BusinessRule.Ecom data = .GetPro(ID.Text) End With Dim newDR As DataRow newDR = nowTable.NewRow
newDR.Item(0) = ID.Text
newDR.Item(1) = data.Tables(0).Rows(0).Item(2)
newDR.Item(2) = data.Tables(0).Rows(0).Item(5)
newDR.Item(3) = 1
newDR.Item(4) = newDR.Item(2)
nowTable.Rows.Add(newDR) Session("myCartTable") = nowTable End Sub
-----------------------------
Object reference not set to an instance of an object.
Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code. Exception Details: System.NullReferenceException: Object reference not set to an instance of an object.Source Error:
Line 147: Dim newDR As DataRow
Line 148:
Line 149: newDR = nowTable.NewRow
Line 150:
Line 151:Private Sub addnewitem()
Dim nowTable As DataTable = New DataTable("nowCartTable")
nowTable = Session("myCartTable")
Dim data As DataSet
With New BusinessRule.Ecom data = .GetPro(ID.Text) End With Dim newDR As DataRow newDR = nowTable.NewRow
newDR.Item(0) = ID.Text
newDR.Item(1) = data.Tables(0).Rows(0).Item(2)
newDR.Item(2) = data.Tables(0).Rows(0).Item(5)
newDR.Item(3) = 1
newDR.Item(4) = newDR.Item(2)
nowTable.Rows.Add(newDR) Session("myCartTable") = nowTable End Sub
-----------------------------
Object reference not set to an instance of an object.
Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code. Exception Details: System.NullReferenceException: Object reference not set to an instance of an object.Source Error:
Line 147: Dim newDR As DataRow
Line 148:
Line 149: newDR = nowTable.NewRow
Line 150:---------------------------------------------------------------说是没有实例化遍历,,,
为什么阿
Dim nowTable As DataTable = New DataTable("nowCartTable")
nowTable = Session("myCartTable")
Dim data As DataSet
With New BusinessRule.Ecom data = .GetPro(ID.Text) End With Dim newDR As DataRow newDR = nowTable.NewRow
newDR.Item(0) = ID.Text
newDR.Item(1) = data.Tables(0).Rows(0).Item(2)
newDR.Item(2) = data.Tables(0).Rows(0).Item(5)
newDR.Item(3) = 1
newDR.Item(4) = newDR.Item(2)
nowTable.Rows.Add(newDR) Session("myCartTable") = nowTable End Sub
-----------------------------
Object reference not set to an instance of an object.
Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code. Exception Details: System.NullReferenceException: Object reference not set to an instance of an object.Source Error:
Line 147: Dim newDR As DataRow
Line 148:
Line 149: newDR = nowTable.NewRow
Line 150:
Line 151:Private Sub addnewitem()
Dim nowTable As DataTable = New DataTable("nowCartTable")
nowTable = Session("myCartTable")
Dim data As DataSet
With New BusinessRule.Ecom data = .GetPro(ID.Text) End With Dim newDR As DataRow newDR = nowTable.NewRow
newDR.Item(0) = ID.Text
newDR.Item(1) = data.Tables(0).Rows(0).Item(2)
newDR.Item(2) = data.Tables(0).Rows(0).Item(5)
newDR.Item(3) = 1
newDR.Item(4) = newDR.Item(2)
nowTable.Rows.Add(newDR) Session("myCartTable") = nowTable End Sub
-----------------------------
Object reference not set to an instance of an object.
Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code. Exception Details: System.NullReferenceException: Object reference not set to an instance of an object.Source Error:
Line 147: Dim newDR As DataRow
Line 148:
Line 149: newDR = nowTable.NewRow
Line 150:---------------------------------------------------------------说是没有实例化遍历,,,
为什么阿
->
Dim newDR As New DataRow
??
==>可能是session中没有值
注意检查session看看,先打印出来看有没有
这句
你在哪定义Session("myCartTable")的?