Click here to Skip to main content
12,297,724 members (24,240 online)
Click here to Skip to main content
Add your own
alternative version

Stats

632.3K views
29.7K downloads
167 bookmarked
Posted

Export to Excel using VB.Net

, 25 Apr 2008 CPOL
Rate this:
Please Sign up or sign in to vote.
Export data from VB.Net Dataset to Excel without using Datagrid/DataTable

 

Senthil_S__Software_Eng_/image2.jpg

Introduction

Export the data's to Excel of Microsoft office is currently need in many concern. But many of them used very complicated coding for simple export either from Datagrid or DataTable. I used simple Dataset to export the data.

Background

Introducing the way of sending data's from datagrid or by Datatable. I used Dataset which is easy to use. But for code optimization dataset is not advisable compare to Reader and DataTable

Using the code

In current available code for export the data to Excel are given. Which are so completed and not in straight forward. Because they used the Datagrid and DataTable. Which are given below.

From DataTable to Excel sheet,

Dim dt1 As New DataTable
Dim I1, J1 As Integer
For I1 = 0 To dsmas1.Tables(0).Columns.Count - 1
      dt1.Columns.Add(dsmas1.Tables(0).Columns(I1).ColumnName)
 Next
 For I1 = 0 To dsmas1.Tables(0).Rows.Count - 1
      Dim DR As DataRow = Nothing
      DR = dt1.NewRow
      For J1 = 0 To dsmas1.Tables(0).Columns.Count - 1
          DR.Item(J1) = dsmas1.Tables(0).Rows(I1).ItemArray(J1)
      Next
      dt1.Rows.Add(DR)
 Next
 rel_ds.Tables.Add(dt1)
 Dim dt As New DataTable
 Dim I, J As Integer
 For I = 0 To dschd1.Tables(0).Columns.Count - 1
      dt.Columns.Add(dschd1.Tables(0).Columns(I).ColumnName)
 Next
 For I = 0 To dschd1.Tables(0).Rows.Count - 1
      Dim DR As DataRow = Nothing
      DR = dt.NewRow
      For J = 0 To dschd1.Tables(0).Columns.Count - 1
          DR.Item(J) = dschd1.Tables(0).Rows(I).ItemArray(J)
      Next
      dt.Rows.Add(DR)
 Next
  rel_ds.Tables.Add(dt)

For DataGrid to Excel sheet

'verfying the datagridview having data or not
If ((DataGridView1.Columns.Count = 0) Or (DataGridView1.Rows.Count = 0)) Then
    Exit Sub
End If

'Creating dataset to export
Dim dset As New DataSet
'add table to dataset
dset.Tables.Add()
'add column to that table
For i As Integer = 0 To DataGridView1.ColumnCount - 1
    dset.Tables(0).Columns.Add(DataGridView1.Columns(i).HeaderText)
Next
'add rows to the table
Dim dr1 As DataRow
For i As Integer = 0 To DataGridView1.RowCount - 1
    dr1 = dset.Tables(0).NewRow
    For j As Integer = 0 To DataGridView1.Columns.Count - 1
        dr1(j) = DataGridView1.Rows(i).Cells(j).Value
    Next
    dset.Tables(0).Rows.Add(dr1)
Next

Dim excel As New Microsoft.Office.Interop.Excel.ApplicationClass
Dim wBook As Microsoft.Office.Interop.Excel.Workbook
Dim wSheet As Microsoft.Office.Interop.Excel.Worksheet

wBook = excel.Workbooks.Add()
wSheet = wBook.ActiveSheet()

Dim dt As System.Data.DataTable = dset.Tables(0)
Dim dc As System.Data.DataColumn
Dim dr As System.Data.DataRow
Dim colIndex As Integer = 0
Dim rowIndex As Integer = 0

For Each dc In dt.Columns
    colIndex = colIndex + 1
    excel.Cells(1, colIndex) = dc.ColumnName
Next

For Each dr In dt.Rows
    rowIndex = rowIndex + 1
    colIndex = 0
    For Each dc In dt.Columns
        colIndex = colIndex + 1
        excel.Cells(rowIndex + 1, colIndex) = dr(dc.ColumnName)

    Next
Next

wSheet.Columns.AutoFit()
Dim strFileName As String = "D:\ss.xls"
Dim blnFileOpen As Boolean = False
Try
    Dim fileTemp As System.IO.FileStream = System.IO.File.OpenWrite(strFileName)
    fileTemp.Close()
Catch ex As Exception
    blnFileOpen = False
End Try

If System.IO.File.Exists(strFileName) Then
    System.IO.File.Delete(strFileName)
End If

wBook.SaveAs(strFileName)
excel.Workbooks.Open(strFileName)
excel.Visible = True

But i used only Dataset to Excel sheet

In code, I used a user defined function called "Load_Excel_Details()" which i used old technique like create Object for Excel, add the Book for a sheet and sheet for the data.

i.e,.

  • Excel <-- System.Runtime.InteropServices.Marshal.ReleaseComObject(Excel)
    • Book <------ Excel Workbooks.Add()
      • Sheet <----- Excel SheetsInNewWorkbook = 1
        • Data <----- Excel cells(1, i).value

Which is used in the code like given below:

 With Excel
       .SheetsInNewWorkbook = 1
       .Workbooks.Add()
       .Worksheets(1).Select()

      Dim i As Integer = 1
      For col = 0 To ComDset.Tables(0).Columns.Count - 1
           .cells(1, i).value = ComDset.Tables(0).Columns(col).ColumnName
           .cells(1, i).EntireRow.Font.Bold = True
           i += 1
      Next

            i = 2

       Dim k As Integer = 1
       For col = 0 To ComDset.Tables(0).Columns.Count - 1
          i = 2
          For row = 0 To ComDset.Tables(0).Rows.Count - 1
              .Cells(i, k).Value = ComDset.Tables(0).Rows(row).ItemArray(col)
               i += 1
          Next
               k += 1
       Next
          filename = "c:\File_Exported.xls"
         .ActiveCell.Worksheet.SaveAs(filename)
 End With

 

Points of Interest

I used simple For loops.... and insert the values by Rows, Columns and Cells formats.

History

I proposed this after i used in my company project which appreciate by the customers.

License

This article, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

Share

About the Author

Senthil Sambandam
Technical Lead
India India
No Biography provided

You may also be interested in...

Comments and Discussions

 
GeneralMy vote of 5 Pin
Himachandra5-Jul-12 23:06
memberHimachandra5-Jul-12 23:06 

General General    News News    Suggestion Suggestion    Question Question    Bug Bug    Answer Answer    Joke Joke    Praise Praise    Rant Rant    Admin Admin   

Use Ctrl+Left/Right to switch messages, Ctrl+Up/Down to switch threads, Ctrl+Shift+Left/Right to switch pages.

| Advertise | Privacy | Terms of Use | Mobile
Web01 | 2.8.160525.2 | Last Updated 26 Apr 2008
Article Copyright 2007 by Senthil Sambandam
Everything else Copyright © CodeProject, 1999-2016
Layout: fixed | fluid