public void CreateCheckBox()
{
string html = "";
DataSet ds = myDB.Query("SELECT * FROM Road order by R_ID DESC ");
int number = ds.Tables[0].Rows.Count;
for (int a = 0; a < number; a++)
{
html += "<input type='checkbox' Id='chk" + a + "' value='" + ds.Tables[0].Rows[a]["R_ID"].ToString() + "' runat='server' >" + ds.Tables[0].Rows[a]["Road_Name"].ToString() + "<br />";
}
lblCheckbox.Text = html;
}