Esta es la aplicación ASP.NET que he creado. Pero no puedo conectar este proyecto a mi base de datos.

No puedo entender cómo conectar esto a la base de datos. y si quiero convertir este proyecto a mvc cómo hacerlo. Soy nuevo en Asp.net y estoy dispuesto a aprender esto. por favor ayuda. ¿Cuáles son los buenos lenguajes de interfaz para asp.net? Normalmente usamos todo el frontend y el backend en un proyecto como se muestra a continuación. Gracias

Lo que he probado:

default.aspx.cs

<pre>using System;
using System.Configuration;
using System.Data;
using System.Data.SqlClient;

namespace WebApplication4
{
    public partial class _Default : System.Web.UI.Page
    {
        protected void Page_Load(object sender, EventArgs e)
        {
            if (!IsPostBack)
            {
                UpdateCounts();
            }
        }

        protected void btnPass_Click(object sender, EventArgs e)
        {
            InsertInspection("Pass", null);
            UpdateCounts();
        }

        protected void btnFail_Click(object sender, EventArgs e)
        {
            lblFailReason.Visible = true;
            ddlFailReason.Visible = true;
            btnFailSubmit.Enabled = false; // Disable the Submit button initially
        }

        protected void ddlFailReason_SelectedIndexChanged(object sender, EventArgs e)
        {
            btnFailSubmit.Enabled = !string.IsNullOrEmpty(ddlFailReason.SelectedValue);
        }

        protected void btnFailSubmit_Click(object sender, EventArgs e)
        {
            if (!string.IsNullOrEmpty(ddlFailReason.SelectedValue))
            {
                InsertInspection("Fail", ddlFailReason.SelectedValue);
                UpdateCounts();
                HideFailControls();
            }
        }

        private void InsertInspection(string decision, string failReason)
        {
            string connectionString = ConfigurationManager.ConnectionStrings["DefaultConnection"].ConnectionString;

            using (SqlConnection connection = new SqlConnection(connectionString))
            {
                connection.Open();

                using (SqlCommand command = new SqlCommand("InsertMaterialInspection", connection))
                {
                    command.CommandType = CommandType.StoredProcedure;
                    command.Parameters.AddWithValue("@Decision", decision);

                    if (decision == "Pass")
                    {
                        command.Parameters.AddWithValue("@FailReason", DBNull.Value);
                    }
                    else
                    {
                        command.Parameters.AddWithValue("@FailReason", failReason);
                    }

                    command.ExecuteNonQuery();
                }
            }
        }

        private void UpdateCounts()
        {
            string connectionString = ConfigurationManager.ConnectionStrings["DefaultConnection"].ConnectionString;

            using (SqlConnection connection = new SqlConnection(connectionString))
            {
                connection.Open();

                using (SqlCommand command = new SqlCommand("GetInspectionCounts", connection))
                {
                    command.CommandType = CommandType.StoredProcedure;

                    using (SqlDataReader reader = command.ExecuteReader())
                    {
                        if (reader.Read())
                        {
                            int totalCount = Convert.ToInt32(reader["TotalCount"]);
                            int passCount = Convert.ToInt32(reader["PassCount"]);
                            int failCount = Convert.ToInt32(reader["FailCount"]);

                            lblTotalCount.Text = $"Total Count: {totalCount}";
                            lblPassCount.Text = $"Pass Count: {passCount}";
                            lblFailCount.Text = $"Fail Count: {failCount}";
                        }
                    }
                }
            }
        }




        private void HideFailControls()
        {
            ddlFailReason.SelectedIndex = 0; // Reset dropdown to default
            ddlFailReason.Visible = false;
            lblFailReason.Visible = false;
            btnFailSubmit.Enabled = false; // Disable the Submit button after submitting
        }
    }
}

predeterminado.aspx

<%@ Page Title="Home Page" Language="C#" MasterPageFile="~/Site.Master" AutoEventWireup="true" CodeBehind="Default.aspx.cs" Inherits="WebApplication4._Default" %>

<asp:Content ID="BodyContent" ContentPlaceHolderID="MainContent" runat="server">

    <div class="jumbotron">
        <h1>Material Inspection System</h1>
        <p class="lead">Inspect materials and record pass/fail decisions.</p>
    </div>

    <div class="row">
        <div class="col-md-4">
            <h2>Pass</h2>
            <asp:Button ID="btnPass" runat="server" Text="Pass" OnClick="btnPass_Click" CssClass="btn btn-success" />
        </div>
        <div class="col-md-4">
            <h2>Fail</h2>
            <asp:Button ID="btnFail" runat="server" Text="Fail" OnClick="btnFail_Click" CssClass="btn btn-danger" />
            <br />
            <asp:Label ID="lblFailReason" runat="server" Text="Reason for Failure:" Visible="false"></asp:Label>
            <asp:DropDownList ID="ddlFailReason" runat="server" Visible="false" AutoPostBack="true" OnSelectedIndexChanged="ddlFailReason_SelectedIndexChanged">
                <asp:ListItem Text="Select Reason" Value="" />
                <asp:ListItem Text="Defect" Value="Defect" />
                <asp:ListItem Text="Incorrect Specification" Value="Incorrect Specification" />
                <asp:ListItem Text="Damage" Value="Damage" />
            </asp:DropDownList>
            <br />
            <asp:Button ID="btnFailSubmit" runat="server" Text="Submit" OnClick="btnFailSubmit_Click" CssClass="btn btn-danger" Enabled="false" />
        </div>
        <div class="col-md-4">
            <h2>Inspection Summary</h2>
            <div>
                <asp:Label ID="lblTotalCount" runat="server" Text="Total Count: 0"></asp:Label><br />
                <asp:Label ID="lblPassCount" runat="server" Text="Pass Count: 0"></asp:Label><br />
                <asp:Label ID="lblFailCount" runat="server" Text="Fail Count: 0"></asp:Label>
            </div>
        </div>
    </div>

</asp:Content>

configuración web

<connectionStrings>
		<add name="DefaultConnection" connectionString="Data Source=DESKTOP-RVJ62NT\SQLEXPRESS;Initial Catalog=testdb1;Integrated Security=True" providerName="System.Data.SqlClient" />
	</connectionStrings>

Procedimiento de almacenamiento

CREATE TABLE MaterialInspections (
    InspectionID INT IDENTITY(1,1) PRIMARY KEY,
    Decision NVARCHAR(50),
    FailReason NVARCHAR(100)
);

CREATE PROCEDURE InsertMaterialInspection
    @Decision NVARCHAR(50),
    @FailReason NVARCHAR(100) = NULL
AS
BEGIN
    INSERT INTO MaterialInspections (Decision, FailReason)
    VALUES (@Decision, @FailReason);
END;

CREATE PROCEDURE GetInspectionCounts
AS
BEGIN
    SELECT
        (SELECT COUNT(*) FROM MaterialInspections) AS TotalCount,
        (SELECT COUNT(*) FROM MaterialInspections WHERE Decision = 'Pass') AS PassCount,
        (SELECT COUNT(*) FROM MaterialInspections WHERE Decision = 'Fail') AS FailCount
END