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using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Data.OleDb;

namespace Kundenverwalter
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void button1_Click(object sender, EventArgs e)
        {
            OleDbConnection con = new OleDbConnection();
            OleDbCommand cmd = new OleDbCommand();
            OleDbDataReader reader;

            con.ConnectionString = "Provider=Microsoft.Jet.OLEDB.4.0;" + "Data Source=C:\\Users\\x\\Documents\\Kundenbank.accdb";

            cmd.Connection = con;
            cmd.CommandText = "SELECT * from KundenDB";

          

            try
            {
                con.Open();

                reader = cmd.ExecuteReader();
                listBox1.Items.Clear();
                while (reader.Read())
                {
                    listBox1.Items.Add(reader["KdID"] + " # " + reader["KdName"] + " # " + reader["KdVorname"]);
                }

                reader.Close();
                con.Close();
            }

            catch(Exception ex)
            {
                MessageBox.Show(ex.Message);
            }
        }
    }
}