<div>
<asp:repeater runat="server" id="rptCheckBox" xmlns:asp="#unknown">
<itemtemplate>
<input type="checkbox" style="float:left" />
<div style=" width:100%; clear:both;"></div>
</itemtemplate>
</asp:repeater>
</div>
string[] seats = new string[10];
rptCheckBox.DataSource = seats;
rptCheckBox.DataBind();