how to select data from sql on the basis of checkboxex in C#

private void checkBox1_CheckedChanged(object sender, EventArgs e)
       {

           if(checkBox1.Checked==true)
           {
             this.s = checkBox1.Text;
           }
       }

       private void checkBox2_CheckedChanged(object sender, EventArgs e)
       {
           if (checkBox2.Checked == true)
           {
               this.s = checkBox2.Text;
           }
       }

       private void checkBox3_CheckedChanged(object sender, EventArgs e)
       {
           if (checkBox3.Checked == true)
           {
               this.s = checkBox3.Text;
           }
       }

public Action<string> DataSelection = new Action<string>((data) =>
{
    string sqlCommandText = "Select * From YearTable Where Year='" + data + "';";
    // Do the database query execution bit in here.
});

protected void cb2008_CheckedChanged(object sender, EventArgs e)
{
    if (cb2008.Checked)
        DataSelection(cb2008.Text);
}

protected void cb2009_CheckedChanged(object sender, EventArgs e)
{
    if (cb2009.Checked)
        DataSelection(cb2009.Text);
}

protected void cb2010_CheckedChanged(object sender, EventArgs e)
{
    if (cb2010.Checked)
        DataSelection(cb2010.Text);
}