How to export from database to excel using VB.net
By: Issac in VB.net Tutorials on 2009-02-21
In this article we can see how to export from database to excel. We can load the data from a database to dataset and then create a new Excel file and write the data into the Excel file.
First step is to Load the Product table data to data set, next is to create a new Excel file and write the data from dataset to Excel file.
For i = 0 to ds.Tables (0).Rows.Count - 1 For j = 0 to ds.Tables (0).Columns.Count - 1 xlWorkSheet.Cells (i + 1, j + 1) = _ ds.Tables (0).Rows (i).Item (j) Next
Imports System.Data Imports System.Data.SqlClient Imports Excel = Microsoft.Office.Interop.Excel Public Class Form1 Private Sub Button1_Click(ByVal sender As System.Object, _ ByVal e As System.EventArgs) Handles Button1.Click Dim cnn As SqlConnection Dim connectionString As String Dim sql As String Dim i, j As Integer Dim xlApp As Excel.Application Dim xlWorkBook As Excel.Workbook Dim xlWorkSheet As Excel.Worksheet Dim misValue As Object = System.Reflection.Missing.Value xlApp = New Excel.ApplicationClass xlWorkBook = xlApp.Workbooks.Add(misValue) xlWorkSheet = xlWorkBook.Sheets("sheet1") connectionString = "data source=servername;" & _ "initial catalog=databasename;user id=username;password=password;" cnn = New SqlConnection(connectionString) cnn.Open() sql = "SELECT * FROM Product" Dim dscmd As New SqlDataAdapter(sql, cnn) Dim ds As New DataSet dscmd.Fill(ds) For i = 0 To ds.Tables(0).Rows.Count - 1 For j = 0 To ds.Tables(0).Columns.Count - 1 xlWorkSheet.Cells(i + 1, j + 1) = _ ds.Tables(0).Rows(i).Item(j) Next Next xlWorkSheet.SaveAs("C:\vbexcel.xlsx") xlWorkBook.Close() xlApp.Quit() releaseObject(xlApp) releaseObject(xlWorkBook) releaseObject(xlWorkSheet) cnn.Close() MsgBox("You can find the file C:\vbexcel.xlsx") End Sub Private Sub releaseObject(ByVal obj As Object) Try System.Runtime.InteropServices.Marshal.ReleaseComObject(obj) obj = Nothing Catch ex As Exception obj = Nothing Finally GC.Collect() End Try End Sub End Class
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