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How to export databse to excel file

Posted By:abhays       Posted Date: August 30, 2014    Points: 40    Category: ADO.NET    URL: http://www.dotnetspark.com  

How to export databse to excel file

The below C# code block shows how to export database table to an Excel file . First we need to load the data from database to a data set and then create a new Excel file and write the data to Excel file .

using System;
using System.Windows.Forms;
using System.Data;
using System.Data.SqlClient;
using Excel = Microsoft.Office.Interop.Excel; 

namespace WindowsApplication1
    public partial class Form1 : Form
        public Form1()

        private void button1_Click(object sender, EventArgs e)
            SqlConnection cnn ;
            string connectionString = null;
            string sql = null;
            string data = null;
            int i = 0;
            int j = 0; 

            Excel.Application xlApp ;
            Excel.Workbook xlWorkBook ;
            Excel.Worksheet xlWorkSheet ;
            object misValue = System.Reflection.Missing.Value;

            xlApp = new Excel.ApplicationClass();
            xlWorkBook = xlApp.Workbooks.Add(misValue);
            xlWorkSheet = (Excel.Worksheet)xlWorkBook.Worksheets.get_Item(1);

            connectionString = "data source=servername;initial catalog=databasename;user id=username;password=password;";
            cnn = new SqlConnection(connectionString);
            sql = "SELECT * FROM Product";
            SqlDataAdapter dscmd = new SqlDataAdapter(sql, cnn);
            DataSet ds = new DataSet();

            for (i = 0; i <= ds.Tables[0].Rows.Count - 1; i++)
                for (j = 0; j <= ds.Tables[0].Columns.Count - 1; j++)
                    data = ds.Tables[0].Rows[i].ItemArray[j].ToString();
                    xlWorkSheet.Cells[i + 1, j + 1] = data;

            xlWorkBook.SaveAs("csharp.net-informations.xls", Excel.XlFileFormat.xlWorkbookNormal, misValue, misValue, misValue, misValue, Excel.XlSaveAsAccessMode.xlExclusive, misValue, misValue, misValue, misValue, misValue);
            xlWorkBook.Close(true, misValue, misValue);


            MessageBox.Show("Excel file created , you can find the file c:\\csharp.net-informations.xls");

        private void releaseObject(object obj)
                obj = null;
            catch (Exception ex)
                obj = null;
                MessageBox.Show("Exception Occured while releasing object " + ex.ToString());



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