Lowyat.NET: Latest topics by TazmanianzDevil

Keeway Patagonian Eagle or CMC Daytona 250XL

TazmanianzDevil — Wed, 03 Oct 2018 15:48:45 +0800

Please guide me...looking for a bike below 250cc...diemma between these two unpopular models...or maybe Brixton?
Which 1 is more solid ? Easier to get parts?
Thanks...

javascript problem

TazmanianzDevil — Wed, 02 Dec 2009 17:08:19 +0800

CODE

this code is use to test my drop down list, fruit1 is drop down list name, i wonder why if i declare a variable called i, and rename the drop down list using i--->fruit +i then will got error...
i need to do this because i will be creating a loop for this later...
thanks for help...

datagridview calculation problem

TazmanianzDevil — Fri, 17 Apr 2009 15:51:47 +0800

CODE

For Each rowCurrent As DataRow In Me.SalesDataSet.Customer.Rows
If rowCurrent.RowState = DataRowState.Added Then 'Check to see if this is a new datarow
rowCurrent("Subtotal") = rowCurrent("Quantity")*rowCurrent("Price") 'calculate the value of subtotal

End If
Next

i try to calculate on 1 column (subtotal) using another 2 column's data (price * qty)...
how to i calculate it?...
i was using the above code but the error show...

Option Strict On prohibits operands of type Object for operator '*'.

any method to solve this?...
thanks...

VB.Net add class reference...

TazmanianzDevil — Wed, 18 Feb 2009 12:26:45 +0800

i try out this sample in my vb 2005 however the reference problem occur...

Private dsPupils As DataSet

Friend Sub LoadData()
dsPupils = SchoolData.SchoolData.DataModule.GetPupils
Me.dgPupils.DataSource = dsPupils
Me.dgPupils.DataMember = "pupils"
Me.dgPupils.ReadOnly = True

'design the grid
Dim ts1 As New DataGridTableStyle
ts1.MappingName = "pupils"

' Set other properties.
ts1.AlternatingBackColor = Color.LightGray

' Add a GridColumnStyle and set its MappingName
Dim idcol As New DataGridTextBoxColumn
idcol.MappingName = "id"
idcol.HeaderText = "ID"
idcol.Width = 30
ts1.GridColumnStyles.Add(idcol)

' Add a second column style.
Dim TextCol As New DataGridTextBoxColumn
TextCol.MappingName = "firstname"
TextCol.HeaderText = "First Name"
TextCol.Width = 100
ts1.GridColumnStyles.Add(TextCol)

Dim namecol As New DataGridTextBoxColumn
namecol.MappingName = "LastName"
namecol.HeaderText = "Last Name"
namecol.Width = 100
ts1.GridColumnStyles.Add(namecol)

'clear any existing style
dgPupils.TableStyles.Clear()

' Add the DataGridTableStyle instances to
' the GridTableStylesCollection.
dgPupils.TableStyles.Add(ts1)

End Sub

i get this error
"Object reference not set to an instance of an object"
in vb 2005...
i have try to put the class file same location with all form...
and use this dsPupils = SchoolData.DataModule.GetPupils
but same error come out...what is the problem?...

please assist....
thank you veyr much...