<asp:GridView ID="gvReport" runat="server" AutoGenerateColumns="False" GridLines="None"
            ShowHeader="true" HorizontalAlign="Left" OnRowCommand="gvReport_RowCommand">

            <Columns>

                <asp:TemplateField HeaderText="User" ItemStyle-HorizontalAlign="Left">

                    <ItemTemplate>
                       <asp:Image id="img" text=<%#Eval("Coupon_Image")%>/>
                    </ItemTemplate>

                    <HeaderStyle Font-Bold="false" HorizontalAlign="Left" />
                </asp:TemplateField>
                <asp:TemplateField HeaderText="">
                    <ItemTemplate>

                        <asp:Button ID="getCoupon" runat="server" CssClass="btn" Width="145" Height="34"
                            CommandName="getCoupon" CommandArgument='<%#Eval("Coupon_Id")%>' />
                    </ItemTemplate>
                </asp:TemplateField>
            </Columns>
        </asp:GridView>

Image 1    Button
 Image 2    Button

Image1            Image2      Image3
  Button            Button      Button