By: Issac in VB.net Tutorials on 2009-02-21
For exporting data from Datagridview to Excel, connect the database and load data from the database to Datagridview and then create a new excel file and write the data from Datagridview to Excel file.
First step is to Load the Product table data to DataGridView, and create new Excel file and write the data from Datagridview to Excel file.
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 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) DataGridView1.DataSource = ds.Tables(0) cnn.Close() End Sub Private Sub Button2_Click(ByVal sender As System.Object, _ ByVal e As System.EventArgs) Handles Button2.Click Dim xlApp As Excel.Application Dim xlWorkBook As Excel.Workbook Dim xlWorkSheet As Excel.Worksheet Dim misValue As Object = System.Reflection.Missing.Value Dim i As Integer Dim j As Integer xlApp = New Excel.ApplicationClass xlWorkBook = xlApp.Workbooks.Add(misValue) xlWorkSheet = xlWorkBook.Sheets("sheet1") For i = 0 To DataGridView1.RowCount - 2 For j = 0 To DataGridView1.ColumnCount - 1 xlWorkSheet.Cells(i + 1, j + 1) = _ DataGridView1(j, i).Value.ToString() Next Next xlWorkSheet.SaveAs("C:\vbexcel.xlsx") xlWorkBook.Close() xlApp.Quit() releaseObject(xlApp) releaseObject(xlWorkBook) releaseObject(xlWorkSheet) 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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