Calling Excel from VB .net


I'm simply calling excel from a VB .net program as same as i did in VB6.0 as follows-

Dim lobjExApp As New Excel.Application()
Dim lobjExWbk As New Excel.Workbook()
Dim lobjExWst As New Excel.Worksheet()

here when i execute second line it gives me error -
Additional information: COM object with CLSID {00020819-0000-0000-C000-000000000046} is either not valid or not registered.

I've added refernce of microsoft excel9.0 object library and I'm working on Windows 2000 machine.

Can anybody suggest me what to do ?

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Dim xlApp As Excel.Application
Dim xlBook As Excel.Workbook
Dim xlSheetAltNet As Excel.Worksheet

jyotisinhaAuthor Commented:

It delays error to one more step i.e. when i'll do the
xlBook =new Excel.Workbook
it gives same error.
try adding references to 'msoffice' and 'stdole'
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try latebinding.

Dim xlApp As object
Dim xlBook As object
Dim xlSheetAltNet As object


appari, I don't think that should should be an issue, seeing as jyotisinha's process handles the first declaration correctly. I suspect that the program might stall on the latebinding statement with the same exception as before. It's definitely worth a shot, but if it works, I'd like to know why.
The following code seems to work

Dim xlapp As New Excel.Application()
Dim xlBook As Excel.Workbook
Dim xlSheet As Excel.Worksheet

xlBook = xlapp.Workbooks.Add()
xlSheet = xlBook.Worksheets.Add()

xlapp.Visible = True


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jyotisinhaAuthor Commented:
Tom ... yes it works but what's wrong with what I'd done ?
Try The following Code in ur project it will run. Change connectionstring and give the proper table name.
And Add the following references in ur project

The following is the VB.NET Code just copy and paste it in ur project.

Imports System
Imports System.Drawing
Imports System.Collections
Imports System.ComponentModel
Imports System.Windows.Forms
Imports System.Data
Imports System.Data.SqlClient

Namespace SQLServertoExcel
   ' <summary>
   ' Summary description for Form1.
   ' </summary>
   Public Class Form1
      Inherits System.Windows.Forms.Form
        Friend WithEvents button1 As System.Windows.Forms.Button
      ' <summary>
      ' Required designer variable.
      ' </summary>
      Private components As System.ComponentModel.Container = Nothing
      Public Sub New()
         ' Required for Windows Form Designer support
      End Sub 'New
      ' TODO: Add any constructor code after InitializeComponent call
      ' <summary>
      ' Clean up any resources being used.
      ' </summary>
        Protected Overloads Sub Dispose(ByVal disposing As Boolean)
            If disposing Then
                If Not (components Is Nothing) Then
                End If
            End If
        End Sub 'Dispose

        ' <summary>
        ' Required method for Designer support - do not modify
        ' the contents of this method with the code editor.
        ' </summary>
        Private Sub InitializeComponent()
            Me.button1 = New System.Windows.Forms.Button()
            ' button1
            Me.button1.Location = New System.Drawing.Point(32, 72)
            Me.button1.Name = "button1"
            Me.button1.Size = New System.Drawing.Size(216, 112)
            Me.button1.TabIndex = 0
            Me.button1.Text = "Populate Excel With Customer Information From Microsoft SQL Server"
            ' Form1
            Me.AutoScaleBaseSize = New System.Drawing.Size(5, 13)
            Me.ClientSize = New System.Drawing.Size(292, 273)
            Me.Controls.AddRange(New System.Windows.Forms.Control() {Me.button1})
            Me.Name = "Form1"
            Me.Text = "Form1"
        End Sub 'InitializeComponent

        ' <summary>
        ' The main entry point for the application.
        ' </summary>
        <STAThread()> _
        Shared Sub Main()
            Application.Run(New Form1())
        End Sub 'Main

        Private Function GetData() As System.Data.DataTable
            Dim conn As New SqlConnection("Data source=localhost;uid=sa;pwd=sa;database=Temp;")

            Dim adapter As New SqlDataAdapter("select * from EmpDetails", conn)
            Dim myDataSet As New DataSet()
                adapter.Fill(myDataSet, "Customer")
            Catch ex As Exception
            End Try

            Return myDataSet.Tables(0)
        End Function 'GetData

        Private Sub button1_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles button1.Click
            Dim excel As New Excel.ApplicationClass()
            Dim rowIndex As Integer = 1
            Dim colIndex As Integer = 0


            Dim table As DataTable = GetData()

            Dim col As DataColumn
            For Each col In table.Columns
                colIndex += 1
                excel.Cells(1, colIndex) = col.ColumnName
            Next col

            Dim row As DataRow
            For Each row In table.Rows
                rowIndex += 1
                colIndex = 0
                Dim col1 As DataColumn
                For Each col1 In table.Columns
                    colIndex += 1
                    excel.Cells(rowIndex, colIndex) = row(col1.ColumnName).ToString()
                Next col1
            Next row
            excel.Visible = True
        End Sub 'button1_Click
    End Class 'Form1
End Namespace 'SQLServertoExcel
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