asp.net前端调用后端api接口全局：Api方面：前端方面：

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我是靠谱客的博主现实电灯胆，最近开发中收集的这篇文章主要介绍asp.net前端调用后端api接口全局：Api方面：前端方面：，觉得挺不错的，现在分享给大家，希望可以做个参考。

概述

全局：

两个工程中定义用于数据交换的类

成功：

public class Success
    {
        /// <summary>
        /// 成功返回对象<br/>
        /// exp：<br/>
        /// <div style="color:red">登录成功</div>
        /// </summary>
        /// <param name="message">提示信息</param>
        /// <param name="result">数据</param>
        public Success(string message, object result)
        {
            this.code = 200;
            this.message = message;
            this.result = result;
        }
        public int code { get; set; }
        public string message { get; set; }
        public object result { get; set; }
    }

失败：

public class Error
    {
        /// <summary>
        /// 错误返回对象<br/>
        /// exp:<br/>
        /// <font style='color:red'>登录错误</font><br/>
        /// 数据库连接失败<br/>
        /// </summary>
        /// <param name="message">提示信息</param>
        public Error(string message)
        {
            this.code = -1;
            this.message = message;
            this.result = null;
        }
        public int code { get; set; }
        public string message { get; set; }
        public object result { get; set; }
    }

Api方面：

返回值为成功或者失败的类值在类中

/// <summary>
/// 查询所有
/// </summary>
/// <returns></returns>
[HttpGet]
public object QueryAllSysuser()
{
    using (fashionshoppingDBEntities db = new fashionshoppingDBEntities())
    {
        //toList代表关闭查询(关闭长连接)
        return new Success("查询成功", db.Sysuser.ToList());
    }
}
/// <summary>
/// 根据名称查询用户
/// </summary>
/// <param name="username"></param>
/// <returns></returns>
[HttpPost]
public object QuerySysuser(string username)
{
    using (fashionshoppingDBEntities db = new fashionshoppingDBEntities())
    {
        List<Sysuser> u = null;
        if (!string.IsNullOrEmpty(username))
        {
            u = db.Sysuser.Where(o => o.username.Contains(username)).ToList();
        }
        if (u == null)
        {
            return new Error("没有此用户");
        }
        return new Success("查询成功", u);
    }
}
/// <summary>
/// 添加用户
/// </summary>
/// <param name="username">名称</param>
/// <param name="pwd">密码</param>
/// <param name="role">管理员状态</param>
/// <returns></returns>
[HttpPost]
public object SaveSysuser(string username,string pwd,string role)
{
    if (
        string.IsNullOrEmpty(username) || string.IsNullOrEmpty(pwd) ||
        string.IsNullOrEmpty(role)
        )
    {
        return new Error("参数不允许为空");
    }
    Sysuser u = new Sysuser();
    u.username = username;
    u.pwd = pwd;
    u.role = int.Parse(role);
    using (fashionshoppingDBEntities db = new fashionshoppingDBEntities())
    {
        db.Sysuser.Add(u);
        int rows = db.SaveChanges();
        if (rows > 0)
        {
            return new Success("添加成功", u.id);
        }
        return new Error("添加失败");
    }
}
/// <summary>
/// 修改用户
/// </summary>
/// <param name="id">修改的用户id</param>
/// <param name="username">修改后的name</param>
/// <param name="pwd">修改后的密码</param>
/// <param name="role">修改后的状态</param>
/// <returns></returns>
[HttpPost]
public object UpdateSysuser(int id, string username, string pwd, string role)
{
    using (fashionshoppingDBEntities db = new fashionshoppingDBEntities())
    {
        Sysuser user = db.Sysuser.Where(o => o.id.Equals(id)).SingleOrDefault();
        user.username = username;
        user.pwd = pwd;
        user.role = int.Parse(role);
        int rows = db.SaveChanges();
        if (rows > 0)
        {
            return new Success("更新成功", id);
        }
        return new Error("更新失败");
    }
}
/// <summary>
/// 删除用户
/// </summary>
/// <param name="id"> 删除用户id</param>
/// <returns></returns>
[HttpGet]
public object DeleteById(string id)
{
    if (string.IsNullOrEmpty(id))
    {
        return new Error("参数不允许为空");
    }
    using (fashionshoppingDBEntities db = new fashionshoppingDBEntities())
    {
        int Id = int.Parse(id);
        Sysuser u = db.Sysuser.Where(o => o.id.Equals(Id)).SingleOrDefault();
        if (u == null)
        {
            return new Error("没有此用户");
        }
        //删除操作
        db.Sysuser.Remove(u);
        //写入数据库
        int rows = db.SaveChanges();
        if (rows > 0)
        {
            return new Success("删除成功", rows);
        }
        return new Error("删除失败");
    }
}

前端方面：

控制器：

封装的方法：

/// <summary>
/// get请求方法
/// </summary>
/// <param name="url">请求地址</param>
/// <returns></returns>
public Success RequestGet(string url)
{
    //声明http访问
    HttpClient http = new HttpClient();
    //进行异步请求
    Task<string> task = http.GetStringAsync(url);
    //获取返回数据
    string result = task.Result;
    return JsonConvert.DeserializeObject<Success>(task.Result);
}
/// <summary>
/// post请求方式
/// </summary>
/// <param name="url">请求地址？数据</param>
/// <returns></returns>
public Success RequestPost(string url)
{
    //客户端请求
    HttpClient http = new HttpClient();
    var str = "";//请求数据。这里为空
    HttpContent content = new StringContent(str);
    //请求地址
    Task<HttpResponseMessage> postTask = http.PostAsync(url, content);
    HttpResponseMessage result = postTask.Result;//拿到网络请求结果
    result.EnsureSuccessStatusCode();//抛出异常
    Task<string> task = result.Content.ReadAsStringAsync();//异步读取数据
    //发送值前台
    return JsonConvert.DeserializeObject<Success>(task.Result);
}

Action方法：

//页面展示全部

public ActionResult Index()
{
    //访问路径
    string url = "http://localhost:16018/api/Sysuser/QueryAllSysuser";
    Success success = RequestGet(url);
    //请求成功
    if (success.code == 200)
    {
        ViewBag.message = success.message;
        ViewBag.lists = success.result;
    }
    return View();
}

页面代码：

<table border="1" cellspacing="0" cellpadding="0">
    <tr>
        <th>姓名</th>
        <th>密码</th>
        <th>角色</th>
        <th>操作</th>
    </tr>
    @foreach (var item in ViewBag.lists)
    {
        <tr>
            <td>@item.username</td>
            <td>@item.pwd</td>
            <td>
                @if (item.role == 1)
                {
                    @:系统管理员
                }
                else
                {
                    @:普通管理员
                }
            </td>
            <td>
                <a href="/Sysuser/DeleteById?id=@item.id">删除</a>
                <a href="/Sysuser/Update?id=@item.id">更新</a>
            </td>
        </tr>
    }
</table>

请求链接：

查询所有：http://localhost:16018/api/Sysuser/QueryAllSysuser
按name查询：http://localhost:16018/api/Sysuser/QuerySysuser?username={0}
按id查询："http://localhost:16018/api/Sysuser/QuertById?id=" + id
新增用户："http://localhost:16018/api/Sysuser/SaveSysuser?username={0}&pwd={1}&role={2}", username, pwd, role
修改用户："http://localhost:16018/api/Sysuser/UpdateSysuser?id={0}&username={1}&pwd={2}&role={3}", id, username, pwd, role
删除用户：http://localhost:16018/api/Sysuser/DeleteById?id=" + id