EasyXLS

How to export DataSet to Excel in VB.NET

'------------------------------------------------------------------------
' Tutorial 01
'
' This tutorial shows how to export DataSet to Excel file in VB.NET.
' The DataSet contains data from a SQL database, but it also can contain
' data from other sources like GridView, DataGridView, DataGrid or other.
' The cells are formatted using a predefined format (1) .
'------------------------------------------------------------------------
Click here to see the Excel file

Imports EasyXLS
Imports EasyXLS.Constants
Imports System.IO
Imports System.Data

Module Tutorial01

    Sub Main()

        Console.WriteLine("Tutorial 01" & vbCrLf & "----------" & vbCrLf)

        ' Create an instance of the class that exports Excel files 
        Dim workbook As New ExcelDocument

        ' Create the database connection
        Dim sConnectionString As String = _
                   "Initial Catalog=Northwind;Data Source=localhost;Integrated Security=SSPI;"
        Dim sqlConnection As System.Data.SqlClient.SqlConnection = _
                   New System.Data.SqlClient.SqlConnection(sConnectionString)
        sqlConnection.Open()

        ' Create the adapter used to fill the dataset
        Dim sQueryString As String = "SELECT TOP 100 CAST(Month(ord.OrderDate) AS varchar) + "
        sQueryString += "'/' + CAST(Day(ord.OrderDate) AS varchar) + "
        sQueryString += "'/' + CAST(year(ord.OrderDate) AS varchar) AS 'Order Date', "
        sQueryString += "P.ProductName AS 'Product Name', O.UnitPrice AS Price, O.Quantity, "
        sQueryString += "O.UnitPrice * O. Quantity AS Value "
        sQueryString += "FROM Orders AS ord, [Order Details] AS O, Products AS P "
        sQueryString += "WHERE O.ProductID = P.ProductID AND O.OrderID = ord.OrderID"
        Dim adp As System.Data.SqlClient.SqlDataAdapter = _
                   New System.Data.SqlClient.SqlDataAdapter(sQueryString, sqlConnection)

        ' Populate the dataset
        Dim dataset As DataSet = New DataSet
        adp.Fill(dataset)

        ' Export the Excel file (1) 
        Console.WriteLine("Writing file C:\\Samples\\Tutorial01.xlsx.")
        workbook.easy_WriteXLSXFile_FromDataSet("C:\\Samples\\Tutorial01.xlsx", dataset, _
                    New ExcelAutoFormat(Styles.AUTOFORMAT_EASYXLS1) , "Sheet1")

        ' Confirm export of Excel file
        Dim sError As String = workbook.easy_getError()
        If (sError.Equals("")) Then
            Console.Write("File successfully created. Press Enter to Exit...")
        Else
            Console.Write("Error encountered: " + sError + "Press Enter to Exit...")
        End If

        ' Close the database connection
        sqlConnection.Close()

        ' Dispose memory
        workbook.Dispose()
        dataset.Dispose()
        sqlConnection.Dispose()
        adp.Dispose()

        Console.ReadLine()

    End Sub

End Module

EasyXLS Excel libraries:

.NET
Excel Library for VB.NET
full .NET version to import, export or convert Excel files
Excel Writer for VB.NET
.NET version to create and export Excel files
Express Excel Writer for VB.NET
limited .NET version to create and export Excel files in predefined formats
Download EasyXLS™ Excel Library for VB.NET

File formats:

MS Excel 97 - 2003
MS Excel 2007 - 2010
MS Excel 2013
MS Excel 2016
MS Excel 2019
XLSX XLSM XLSB XLS
XML HTML CSV TXT