WebForm2.aspx

<%@ Page Title="" Language="C#" MasterPageFile="~/Site1.Master" AutoEventWireup="true" CodeBehind="WebForm2.aspx.cs" Inherits="AppWeb.WebForm2" %>
<asp:Content ID="Content1" ContentPlaceHolderID="ContentPlaceHolder1" runat="server">
    <p>
        <asp:DropDownList ID="DropDownList2" runat="server" AutoPostBack="True"
            DataSourceID="ObjectDataSource3" DataTextField="NombreCat"
            DataValueField="IdCategoria">
        </asp:DropDownList>
        <asp:ObjectDataSource ID="ObjectDataSource3" runat="server"
            SelectMethod="ListarTodo" TypeName="DAO.DAOCategoria">
        </asp:ObjectDataSource>
    </p>
    <p>
        <asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="False"
            CellPadding="4" DataKeyNames="IdProducto" DataSourceID="ObjectDataSource1"
            ForeColor="#333333" GridLines="None">
            <AlternatingRowStyle BackColor="White" ForeColor="#284775" />
            <Columns>
                <asp:CommandField ShowEditButton="True" />
                <asp:BoundField DataField="IdProducto" HeaderText="IdProducto"
                    SortExpression="IdProducto" Visible="False" />
                <asp:TemplateField HeaderText="ID">
                    <EditItemTemplate>
                        <asp:Label ID="Label2" runat="server" Text='<%# Eval("IdProducto") %>'></asp:Label>
                    </EditItemTemplate>
                    <ItemTemplate>
                        <asp:Label ID="Label1" runat="server" Text='<%# Eval("IdProducto") %>'></asp:Label>
                    </ItemTemplate>
                </asp:TemplateField>
                <asp:BoundField DataField="Nombre" HeaderText="Nombre" SortExpression="Nombre"
                    Visible="False" />
                <asp:TemplateField HeaderText="Nombre">
                    <EditItemTemplate>
                        <asp:TextBox ID="TextBox1" runat="server" Text='<%# Bind("Nombre") %>'></asp:TextBox>
                        <asp:RequiredFieldValidator ID="RequiredFieldValidator1" runat="server"
                            ControlToValidate="TextBox1" ErrorMessage="Nombre Requerido"></asp:RequiredFieldValidator>
                    </EditItemTemplate>
                    <ItemTemplate>
                        <asp:Label ID="Label3" runat="server" Text='<%# Eval("Nombre") %>'></asp:Label>
                    </ItemTemplate>
                </asp:TemplateField>
                <asp:BoundField DataField="Precio" HeaderText="Precio" SortExpression="Precio"
                    Visible="False" />
                <asp:TemplateField HeaderText="Precio">
                    <EditItemTemplate>
                        <asp:TextBox ID="TextBox2" runat="server" Text='<%# Bind("Precio") %>'></asp:TextBox>
                        <asp:RangeValidator ID="RangeValidator1" runat="server"
                            ControlToValidate="TextBox2" ErrorMessage="Fuera de Rango" MaximumValue="10000"
                            MinimumValue="10" Type="Double" Display="Dynamic"></asp:RangeValidator>
                        <asp:RequiredFieldValidator ID="RequiredFieldValidator2" runat="server"
                            ControlToValidate="TextBox2" ErrorMessage="Precio Requerido"
                            Display="Dynamic"></asp:RequiredFieldValidator>
                    </EditItemTemplate>
                    <ItemTemplate>
                        <asp:Label ID="Label4" runat="server" Text='<%# Eval("Precio") %>'></asp:Label>
                    </ItemTemplate>
                </asp:TemplateField>
                <asp:BoundField DataField="IdCategoria" HeaderText="IdCategoria"
                    SortExpression="IdCategoria" Visible="False" />
                <asp:TemplateField HeaderText="Categoria">
                    <EditItemTemplate>
                        <asp:DropDownList ID="DropDownList1" runat="server"
                            DataSourceID="ObjectDataSource2" DataTextField="NombreCat"
                            DataValueField="IdCategoria" SelectedValue='<%# Bind("IdCategoria") %>'>
                        </asp:DropDownList>
                        <asp:ObjectDataSource ID="ObjectDataSource2" runat="server"
                            SelectMethod="ListarTodo" TypeName="DAO.DAOCategoria">
                        </asp:ObjectDataSource>
                    </EditItemTemplate>
                    <ItemTemplate>
                        <asp:DropDownList ID="DropDownList1" runat="server"
                            DataSourceID="ObjectDataSource2" DataTextField="NombreCat"
                            DataValueField="IdCategoria" Enabled="False"
                            SelectedValue='<%# Bind("IdCategoria") %>'>
                        </asp:DropDownList>
                        <asp:ObjectDataSource ID="ObjectDataSource2" runat="server"
                            SelectMethod="ListarTodo" TypeName="DAO.DAOCategoria">
                        </asp:ObjectDataSource>
                    </ItemTemplate>
                </asp:TemplateField>
            </Columns>
            <EditRowStyle BackColor="#999999" />
            <FooterStyle BackColor="#5D7B9D" Font-Bold="True" ForeColor="White" />
            <HeaderStyle BackColor="#5D7B9D" Font-Bold="True" ForeColor="White" />
            <PagerStyle BackColor="#284775" ForeColor="White" HorizontalAlign="Center" />
            <RowStyle BackColor="#F7F6F3" ForeColor="#333333" />
            <SelectedRowStyle BackColor="#E2DED6" Font-Bold="True" ForeColor="#333333" />
            <SortedAscendingCellStyle BackColor="#E9E7E2" />
            <SortedAscendingHeaderStyle BackColor="#506C8C" />
            <SortedDescendingCellStyle BackColor="#FFFDF8" />
            <SortedDescendingHeaderStyle BackColor="#6F8DAE" />
        </asp:GridView>
        <asp:ObjectDataSource ID="ObjectDataSource1" runat="server"
            DataObjectTypeName="ENTIDADES.eProducto" SelectMethod="ListarPorCategoria"
            TypeName="DAO.DAOProducto" UpdateMethod="Actualizar">
            <SelectParameters>
                <asp:ControlParameter ControlID="DropDownList2" Name="IdCategoria"
                    PropertyName="SelectedValue" Type="Int32" />
            </SelectParameters>
        </asp:ObjectDataSource>
    </p>
</asp:Content>