C# tutorial-Database support: DataAdapter and DataSet objects

DataAdapter and DataSet objects

DataAdapter object can connect to a database through a Connection object. It has a method (Fill) that can fill data to a DataSet object. DataSet object stores tables and relationships among those tables in memory temporarily.

Example: Retrieve data from tblimages and populate the data to a listview control(Lstimages)

Retreive database


namespace CWindowGUI


    public partial class ImageView : Form



        public ImageView()




  //select the first item of the listview

            Lstimages.Items[0].Selected = true;



private void displaydata(){

        DataSet ds=new DataSet();


        OleDbDataAdapter ad;


        //Start connection

        OleDbConnection cn=new OleDbConnection();

       //Set connection string

        cn.ConnectionString="Provider=Microsoft.Jet.Oledb.4.0; Data Source="+ Application.StartupPath+ "\\dbimages.mdb";

        //open the connection



        //create DataAdapter object

        ad = new OleDbDataAdapter("Select * From tblimages", cn);

        //Fill data to DataSet object

        ad.Fill(ds, "tblimages");

        //clear listview


        //add columns


        int p=0;

        //populate the listview

        foreach (DataRow row in ds.Tables[0].Rows){

            addDataToList(p, row[ds.Tables[0].Columns[0]].ToString(), row[ds.Tables[0].Columns[1]].ToString());


        //close the connection




private void addcolumns(){

        Lstimages.View = View.Details;

        //disable multi selection and enable full row selection

        Lstimages.MultiSelect = false;

        Lstimages.FullRowSelect = true;

        //add 2 columns to listview--ID and Path


        Lstimages.Columns.Add("ID", 30, HorizontalAlignment.Center);

        Lstimages.Columns.Add("Path", 300, HorizontalAlignment.Center);





private void addDataToList(int index , string  id, string path)




    ListViewItem item = new ListViewItem(id,index);









private void Lstimages_SelectedIndexChanged(object sender, EventArgs e)


    ListView.SelectedListViewItemCollection sel = Lstimages.SelectedItems;

    foreach (ListViewItem item in sel)


        //view selected image







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