Visual Basic Discussion Boards

C#Coudou22-Mar-09 17:50

22-Mar-09 17:50

mates,
how to convert date to integer in vb.net. I searched already in google
and test it. Convert.Int32 is not what i want.

When i code it in 
VB6/VBA: 
Dim m_lDate As Long 
m_lDate = Date
m_lDate = DateAdd("m", -1, m_lDate)
This will work.

But it VB.NET:
Dim mDate As Integer
m_lDate = Date
mDate = DateAdd("m", 1, mDate)

Got an error: 
Value of type 'Date' cannot be converted to 'Integer'

How to do that in VB.NET?
Thanks in advance

C# コードMicrosoft End User
2000-2008

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Re: Convert Date to Integer

Christian Graus22-Mar-09 20:09

Christian Graus

22-Mar-09 20:09

What do you want the int to be tho ? Would the property that returns a value in Ticks do what you need ?

Christian Graus

Driven to the arms of OSX by Vista.

Re: Convert Date to Integer

C#Coudou22-Mar-09 20:35

C#Coudou

22-Mar-09 20:35

Christian Graus wrote:
What do you want the int to be tho ?

I need it to my function that will add date, month, and year when i press
+/- button.

Here's what i did in vba.

Function ScrollDate(FNAME As String, CTname As Control, vskip)

    Dim CTLN As Date
    CTLN = CTname
    CTLN = CTLN + vskip
    CTname = CTLN
    DoCmd.RepaintObject A_FORM, FNAME

End Function

So everytime i will click +/- button, i will call ScrollDate

Perfectly working in vba.

But in vb.net. I don't know what to do?

Re: Convert Date to Integer

Christian Graus22-Mar-09 20:42

Christian Graus

22-Mar-09 20:42

YOu mean, add two dates together ? How does this relate to having the date in a form as a single int ? What I don't get it, what format do you want, specifically, or don't you care, so long as it represents a date as an int ?

Christian Graus

Driven to the arms of OSX by Vista.

Re: Convert Date to Integer

C#Coudou22-Mar-09 21:20

C#Coudou

22-Mar-09 21:20

Christian Graus wrote:
what format do you want, specifically, or don't you care, so long as it represents a date as an int ?

yes, i don't care the format, as long as i get the int value from date value.

Example in vb6/vba:
myDate as Long
myDate = Date (2009/03/23)
so therefore myDate = 39896 (long)-->i need this in vb.net

Re: Convert Date to Integer

Christian Graus22-Mar-09 21:53

Christian Graus

22-Mar-09 21:53

OK, so ANY int value will do ? So the Ticks property I suggested you use, in my first reply, will work just fine ? DateTime.Now.Ticks

Christian Graus

Driven to the arms of OSX by Vista.

database connection dotnet with access

hari Rayala22-Mar-09 8:32

hari Rayala

22-Mar-09 8:32

how to connect msaccess database in dotnet

Re: database connection dotnet with access

DaveAuld22-Mar-09 8:39

DaveAuld

22-Mar-09 8:39

a) By searching google and following the thousands of examples.

b) By reading the help manuals

c) By searching this site, i doubt you are the first to ask!

Dave
Who am I?: http://www.bebo.com/daveauld/

Re: database connection dotnet with access

dan!sh 22-Mar-09 9:19

dan!sh

22-Mar-09 9:19

It took you 7 minutes here and still no direct answer. While, googling would have taken less than a minute.

जय हिंद

Problem related to sorting of Listview

nazimghori22-Mar-09 8:15

nazimghori

22-Mar-09 8:15

hello every one...

i want to sort particular column of Listview on click of label

for that i wrote code in label mouse click event:-

Private Sub lbl2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles lbl2.Click

        Try
            Me.lst1.Sorting = SortOrder.Descending
           
        Catch ex As Exception
            MsgBox(ex.ToString)
        End Try

    End Sub

but this code sorts the whole listview but i want to sort particular column

of Listview....and for that this code doesn't work...

so please suggest me what to do...
Smile | :)

DaveAuld22-Mar-09 8:48

DaveAuld

22-Mar-09 8:48

Here is a ms article on doing it in VS2005,

http://msdn.microsoft.com/en-us/kb/kb00319399.aspx[^]

Dave
Who am I?: http://www.bebo.com/daveauld/

Reading Time

Gary M22-Mar-09 3:47

Gary M

22-Mar-09 3:47

I am programming in VB.NET.

I have a csv comma delimited file with this data in it.

1212.5,10:01:56,2
1212.25,10:01:59,1
1212.5,10:02:00,1
1212.25,10:02:01,1
1212.5,10:02:04,7
1212.25,10:02:04,2
1212.5,10:02:05,2
1212.25,10:02:07,16
1212.5,10:02:10,1
1212.25,10:02:10,1
1212.5,10:02:11,1

I read the second field, which is the time field into this structure TickData(i).dTime.Str But I can't figure out how to put the hour into TickData(i).dTime.H and the minute into TickData(i).dTime.M and the seconds into TickData(i).dTime.S.
My structure's are as follow.

Structure TickTime
Dim H As Single
Dim M As Single
Dim S As Single
Dim Str As String
End Structure

Structure TickD
Dim CPrice As Double
Dim dTime As TickTime
Dim Vol As Double
End Structure

Could someone Please help!

Thank You

Gary

Re: Reading Time

George B Gilbert22-Mar-09 5:30

George B Gilbert

22-Mar-09 5:30

The key is the Split method.

Dim timeParts() as string
timeparts = TickData(i).dTime.Str.Split(":")
TickData(i).dTime.H = Ctype(timeParts(0), Single)
TickData(i).dTime.M = Ctype(timeParts(1), Single)
TickData(i).dTime.S = Ctype(timeParts(2), Single)

Unless there's a reason for using Single in the Structure for the time elements, you might want to save some bytes, and eliminate any possible rounding issues by using Integer or even Short.

Re: Reading Time

Gary M22-Mar-09 6:46

Gary M

22-Mar-09 6:46

Thank You very much. I will try this right away!

Gary

Re: Reading Time

Gary M22-Mar-09 6:58

Gary M

22-Mar-09 6:58

I tried it but this is the error I got.

System.NullReferenceException was unhandled
Message="Object reference not set to an instance of an object."
Source="TickChart"
StackTrace:

/////////////////////////////////////////////////////////////////////////////

This is how I did the loop!

Dim timeParts() As String
For i = 1 To UBound(TickData)
timeParts = TickData(i).dTime.Str.Split(":")
TickData(i).dTime.H = CType(timeParts(0), Single)
TickData(i).dTime.M = CType(timeParts(1), Single)
TickData(i).dTime.S = CType(timeParts(2), Single)
Next

Re: Reading Time

George B Gilbert22-Mar-09 7:43

George B Gilbert

22-Mar-09 7:43

Looks like a confusion of variable names. The object "TickChart" has apparently not been instantiated. I don't see "TickChart" anywhere in this discussion except in the unhandled exception. I may have caused the problem by using "TickData" in my code. Should that be "TickTime" instead?

Re: Reading Time

Gary M22-Mar-09 11:43

Gary M

22-Mar-09 11:43

Here is how I started

Structure TickTime
        Dim H As Single
        Dim M As Single
        Dim S As Single
        Dim Str As String
    End Structure

    Structure TickD
        Dim CPrice As Double
        Dim dTime As TickTime
        Dim Vol As Double
    End Structure

Public TickData() As TickD 'price data array

Then I loaded the data into TickData in a LoadData sub

Sub LoadData()

ReDim TickData(50)

end sub

Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
        Dim i As Integer

        Dim timeParts() As String
        For i = 1 To UBound(TickData)
            timeParts = TickData(i).dTime.Str.Split(":")
            TickData(i).dTime.H = CType(timeParts(0), Single)
            TickData(i).dTime.M = CType(timeParts(1), Single)
            TickData(i).dTime.S = CType(timeParts(2), Single)
        Next
end sub

But I still get that same error from the above Bold Text!

Re: Reading Time

George B Gilbert22-Mar-09 12:17

George B Gilbert

22-Mar-09 12:17

1. Looks like there is a possible scope issue. Try making both of the Structures and all of their components Public. E.g.:

Public Structure TickTime
    Public H As Single
    Public M As Single
    Public S As Single
    Public Str As String
End Structure

2. All arrays in .NET are zero based. Your For...Next loop starts at 1. You might also use the .NET version for getting array bounds. With the below changes the loop will look at all 51 of the array elements.

For i = 0 To TickData.GetUpperbound(0)

3. I'm assuming there is more code in the LoadData sub other than the Redim statement. Are all 51 elements (including TickData(0)) of the TickData array being populated? If not, that could also cause the error. If there is less than 51 data records being read into the array, the size of the TickData array cannot be larger than the number of data records minus 1.

Re: Reading Time

Gary M23-Mar-09 11:55

Gary M

23-Mar-09 11:55

Thanks alot George, I was trying to read more elements than I had, which was causing the error. Now I will be using TickData.GetUpperbound(0).

Thanks again

Gary

Re: Reading Time

George B Gilbert23-Mar-09 16:28

George B Gilbert

23-Mar-09 16:28

Excellent! Good job!

Re: Reading Time

0x3c022-Mar-09 7:01

0x3c0

22-Mar-09 7:01

Look into the DateTime.ParseExact function. You may also need to look into the format specifiers

Re: Reading Time

Gary M22-Mar-09 11:45

Gary M

22-Mar-09 11:45

Thanks you I will do that.

How to save file to particular location in VB

manni_n22-Mar-09 3:16

manni_n

22-Mar-09 3:16

I am not a VB programmer.
But have to create a macro in excel sheet which uses VB code.
Actually on closing of Excel sheet i have a message box which asks to save the file.
In that i am not able to make VB code to save the file to particular location.
Can anybody provide me VB code so that i can save excel file to desired or predefined location.
I have tried some codes from net but they are not working.
Please help me out as whole module on which i am being working from one week is stuck because of this.
Thanks in advance.

Re: How to save file to particular location in VB

DaveAuld22-Mar-09 21:09

DaveAuld

22-Mar-09 21:09

The workbook object has a close method that has save changes parameter and a filename paramater.

Suspect you need to use that somehow.

Dave
Who am I?: http://www.bebo.com/daveauld/

Problem while executing client-server program

Gagan.2021-Mar-09 18:35

Gagan.20

21-Mar-09 18:35

Hi all...

I have created a client-server program in VB.Net to rum on LAN. Since I started my project in Windows Vista Ultimate, program run normally. Now the same program,without any changes, I tried to run on Windows XP SP2 (which have already installed VS2005), it gave an error while connecting to server. The error message is : "a socket operation was attempted to an unreachable host".

Suggest me how to solve this problem.

Thanks.

Gagan

Last Visit: 31-Dec-99 18:00 Last Update: 2-May-24 11:30

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