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Accepted
Daniel Rivas
Asked: 2022-06-25 14:07:45 +0800 CST 2022-06-25 14:07:45 +0800 CST

Get a value from a textbox of a DataList

  • 772

I have a DataList in ASP.NET that brings me the products from the "Products" table, so with the instruction "Eval"I assign the product ID:

<asp:TextBox ID="idProductoText" runat="server" type="hidden" value='<%# Eval("PRO_ID") %>'></asp:TextBox>

So in my C# code I need to get the value of that TextBox by its ID, for example a idProductoText.Text.Trim();, but for some reason it doesn't work, any solution? I leave the full DataList below.

Code to fill the DataList:

public void cargarStockProductos()
        {
            OracleConnection conexion = new OracleConnection(con);
            OracleCommand command = new OracleCommand("MOSTRAR_PRODUCTOS_COMPRAR", conexion);
            command.CommandType = System.Data.CommandType.StoredProcedure;
            command.Parameters.Add("registros", OracleDbType.RefCursor).Direction = ParameterDirection.Output;
            OracleDataAdapter d = new OracleDataAdapter();
            d.SelectCommand = command;
            DataTable dt = new DataTable();
            d.Fill(dt);
            DataList1.DataSource = dt;
            DataList1.DataBind();
            conexion.Close();
        }

Full DataList in ASP.NET

<asp:DataList ID="DataList1" runat="server">
                    <ItemTemplate>
                        <div class="card mb-6" style="max-width: 1400px">
                            <div class="row g-0">
                                <div class="col-md-4">
                                    <img
                                        src="../../img/sillon.jpg"
                                        class="img-fluid rounded-start"
                                        alt="producto" />
                                </div>
                                <div class="col-lg-5 m-4 form-floating">
                                    <div class="card-body">
                                        <!-- EL ID DEL PRODUCTO ESTÁ OCULTO, SOLO SE USARÁ PARA AGREGAR AL CARRITO -->
                                        <asp:TextBox ID="idProductoText" runat="server" type="hidden" value='<%# Eval("PRO_ID") %>'></asp:TextBox>                
                                        <asp:Label ID="PRO_NOMBRELabel" class="card-title" runat="server" Text='<%# Eval("PRO_NOMBRE") %>' Font-Bold="true" Font-Size="Large" Visible="True" />
                                        <br />
                                        <br />
                                        Q<asp:Label ID="PRO_PRECIOLabel" class="card-text" runat="server" Text='<%# Eval("PRO_PRECIO") %>' Font-Size="Large" />
                                        <br />
                                        <br />
                                        <div class="input-group">                                            
                                          <asp:Button ID="masInformacion" runat="server" Text="Más Información" class="btn btn-dark m-2" />
                                          <asp:TextBox ID="cantidadComprar" runat="server" type="number" class="form-control m-2" placeholder="Cantidad a Comprar"></asp:TextBox>
                                          <asp:Button ID="agregarCarrito" runat="server" Text="Agregar al Carrito" class="btn btn-success m-2"/ OnClick="agregarCarrito_Click"/>
                                        </div>
                                    </div>
                                </div>
                            </div>
                        </div>
                        <br />
                    </ItemTemplate>
                </asp:DataList>
c#

1 Answers

  1. Best Answer

    In the end I solved it in the following way:

    • A button type variable is created with the ID of the button that executes the action and the "sender" event, that is, send.

    • An object of type DataListItem is created when the sender event of the variable "button" or addCart is pressed

    • With the item element of the datalist, the ID of the Textbox is taken and the object of type textbox (TextBox) is created

    • It is assigned to a string variable and the result is converted to type string.

      // OBTAIN THE SEND VALUE OF THE "ADD CART" BUTTON Button AddCarrito = (Button)sender;

                  //SE CREA UN DATALISTITEM, PARA OBTENER LOS VALORES DENTRO DEL DATALIST
            DataListItem item = (DataListItem)agregarCarrito.Parent;

            
            //SE OBTIENE EL VALOR DEL TEXTBOX "CANTIDADPROD"
            TextBox cantidadComprar = (TextBox)item.FindControl("cantidadComprar");
            string cantProducto = cantidadComprar.Text.ToString();
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