how to write the code for detailsview control button

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C#3.0

C#

ASP.NET

<asp:DataList ID="DataList1" runat="server">
        <HeaderTemplate>orkut</HeaderTemplate>
           <ItemTemplate>
 <asp:TextBox ID="t1" runat="server" Text='<%#Eval("pic") %>'></asp:TextBox>
        </ItemTemplate>
                <EditItemTemplate>
                </EditItemTemplate>
        <ItemTemplate>
        <asp:CheckBox ID="c1" runat="server" />
        <img src='<%#Eval("pic") %>' height="90" width="70" />
        <asp:Label ID="l1" runat="server" Text='<%#Eval("name") %>'></asp:Label><br/>
        <asp:Label  ID="t1" runat ="server"    Text='<%#Eval("message")  %>'></asp:Label> <br/>
        <asp:Button ID="b1" runat="server" Text="reply" />
        </ItemTemplate>

when click the button i want one textbox and one button it is possible
and i want write code for this button.