C# ve SQL

using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;

namespace Dock
{
  public Form1()
 {
  InitializeComponent();
 }
 private void Form1_Load(object sender, System.EventArgs e)
  {
   string[] s = {"Yok", "Sola", "Sağa", "Üste", "Alta", "İçine"};
   comboBox1.Items.AddRange(s);
   comboBox2.Items.AddRange(s);
   comboBox3.Items.AddRange(s);
   //Olayları birleştir
   comboBox2.SelectedIndexChanged += new EventHandler(comboBox1_SelectedIndexChanged);
   comboBox3.SelectedIndexChanged += new EventHandler(comboBox1_SelectedIndexChanged);
  }

  private void comboBox1_SelectedIndexChanged(object sender, System.EventArgs e)
  {
   switch((sender as ComboBox).Text)
   {
    case "Sola":
     (sender as ComboBox).Parent.Dock = DockStyle.Left;
     break;
    case "Sağa":
     (sender as ComboBox).Parent.Dock = DockStyle.Right;
     break;
    case "Üste":
     (sender as ComboBox).Parent.Dock = DockStyle.Top;
     break;
    case "Alta":
     (sender as ComboBox).Parent.Dock = DockStyle.Bottom;
     break;
    case "İçine":
     (sender as ComboBox).Parent.Dock = DockStyle.Fill;
     break;
    case "Yok":
     (sender as ComboBox).Parent.Dock = DockStyle.None;
     break;
   }
  }

}
}