在ASP.NET MVC中使用简单查询 [英] using simple queries in ASP.NET MVC

问题描述

我检查了google，但发现没有任何好处.我在MVC中而不是在Entity Framework等中搜索usinf传统SQL查询.因此，如果你们提供一些示例，那就太好了.

I checked google but found nothing good. I am searching for usinf Traditional SQL queries in MVC instead of Entity framework etc. So it would be good if you guys provide me some examples.

我开始学习MVC，但是很多示例都使用linq至SQL和EF等，这些我根本不想使用，我想在Model中使用简单的旧SQL查询层.

I started to learn MVC but lot of examples uses linq to SQL and EF etc which I don't want to use at all, I want to use simple old SQL queries in Model layer.

推荐答案

最简单的示例:

//Domain Class
using System;
using System.Collections.Generic;
using System.Data.SqlClient;
using System.Linq;
using System.Web;

namespace BanjoOnMyKnee.Models
{
    public class DomainModel
    {
        public string connectionString = ".\\SQLEXPRESS; Initial-Catalog=YourDBName; Integrated-Security=true";
        public void CreateSomething(ViewModel model)
        {
            using(SqlConnection connection = new SqlConnection(connectionString))
            using (SqlCommand command = new SqlCommand("",connection))
            {
                command.CommandText = "insert into Names values(@Name)";
                command.Parameters.AddWithValue("@Name", model.Name);
                command.ExecuteNonQuery();
            }
        }

        public ViewModel FindSomething(int id)
        {
            var model = new ViewModel();
            using (SqlConnection connection = new SqlConnection(connectionString))
            using (SqlCommand command = new SqlCommand("", connection))
            {
                command.CommandText = "select * from Names where Id=@Id";
                command.Parameters.AddWithValue("@Id",id);
                SqlDataReader reader = command.ExecuteReader();
                model.Id = id;
                model.Name = reader["Name"].ToString();
            }
            return model;
        }

        public void DeleteSomething(ViewModel model)
        {
            using (SqlConnection connection = new SqlConnection(connectionString))
            using (SqlCommand command = new SqlCommand("", connection))
            {
                command.CommandText = "delete from Names where Id=@Id";
                command.Parameters.AddWithValue("@Id", model.Id);
                command.ExecuteNonQuery();
            }
        }

        public void EditSomething(ViewModel model)
        {
            using (SqlConnection connection = new SqlConnection(connectionString))
            using (SqlCommand command = new SqlCommand("", connection))
            {
                command.CommandText = "Update Names set Name=@Name where Id=@Id";
                command.Parameters.AddWithValue("@Name", model.Name);
                command.Parameters.AddWithValue("@Id", model.Id);
                command.ExecuteNonQuery();
            }
        }
    }
}

这是我的控制器类

//My Controller class
public class HomeController : Controller
{
    //
    // GET: /Home/

    public ActionResult Index()
    {
        return View();
    }

    //
    // GET: /Home/Create

    public ActionResult Create()
    {
        return View(new ViewModel());
    }

    //
    // POST: /Home/Create

    [HttpPost]
    public ActionResult Create(ViewModel vm)
    {
        try
        {
            var domainModel = new DomainModel();
            domainModel.CreateSomething(vm);
            return RedirectToAction("Index");
        }
        catch
        {
            return View(new ViewModel());
        }
    }

    //
    // GET: /Home/Edit/5

    public ActionResult Edit(int id)
    {
        ViewModel model = new DomainModel().FindSomething(id);
        return View(model);
    }


    [HttpPost]
    public ActionResult Edit(ViewModel editModel)
    {
        try
        {
            var dm = new DomainModel();
            dm.EditSomething(editModel);
            return RedirectToAction("Index");
        }
        catch
        {
            return View(new ViewModel());
        }
    }
 }

我的ViewModel类

My ViewModel class

//My ViewModel
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;

namespace BanjoOnMyKnee.Models
{
    public class ViewModel
    {
        public int Id { get; set; }
        public string Name { get; set; }
    }
}

我的创建"视图

//My view
@model BanjoOnMyKnee.Models.ViewModel

@{
    ViewBag.Title = "Create";
}

<h2>Create</h2>

@using(Html.BeginForm()){
    @Html.HiddenFor(m => m.Id);
    <p> Name : 
        Html.EditorFor(m=>m.Name);</p>
    <input type="submit" value="Create" />
}

这篇关于在ASP.NET MVC中使用简单查询的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！