• 简单记录在Visual Studio 2013中创建ASP.NET Web API 2


      在很多跨平台的应用中就需要Web API ,比如android与数据库的交互。

    Create a Web API Project                                                                                                      

    选择新建项目下的模板下的Visual C#节点下的Web节点,在模板列表下选择ASP.NET Web 应用程序,并命名为ChatApp就可以了。

    image

    新建ASP.NET项目下选择Web API 点击确定就可以了。

    image

    Adding a Model                                                                                                                       

    在解决方案下新建一个Model

    //新建Model User
    namespace APP_Chat.Models
    {
        public class User
        {
            public string UID { get; set; }
            public string LoginName { get; set; }
            public string Name { get; set; }
            public string Pwd { get; set; } 
            public DateTime CreateTime { get; set; }
    
        }
    }
    //新建Model ResponseLoginState
    namespace APP_Chat.Models
    {
        public class ResponseLoginState
        {
            public User user { get; set; }
            public int state { get; set; }
            public string msg { get; set; }
        }
    }
    // 新建Model RequestLogin
    namespace APP_Chat.Models
    {
        public class RequestLogin
        {
            public string LoginName { get; set; }
            public string Pwd { get; set; }
        }
    }

    Adding a Controller                                                                                                                 

    在解决方案下新建一个控制器

    image

    选择一个空的模板即可

    image

    下面就添加控制器的名称(Controller命名是有规范的,不能更改后面的Controller部分也不能在后门添加字符,不然都会导致最后无法访问到这个Controller像这个Controller就是通过/api/ChatApp/访问的,当然默认是Get的请求方式)

    image

    namespace APP_Chat.Controllers
    {
        public class ChatAppController : ApiController
        {
    
            /// <summary>
            /// 用户登录
            /// </summary>
            /// <param name="user">用户的登录名 - LoginName,密码 - Pwd</param>
            /// <returns>登录成功则返回用户的信息,和state=1</returns>   [HttpPost] http 请求方式 
            [HttpPost] 
            public ResponseLoginState Login(RequestLogin user)
            {
                if (string.IsNullOrWhiteSpace(user.LoginName))
                    return new ResponseLoginState() { state = 0, msg = "参数错误,LoginName未传出!" };
                if (string.IsNullOrWhiteSpace(user.Pwd))
                    return new ResponseLoginState() { state = 0, msg = "参数错误,Name未传出!" };
                
                #region
                using (var conn = new System.Data.OracleClient.OracleConnection(OracleHelper.ConnString))
                {
                    conn.Open();
                    var command = conn.CreateCommand();
                    command.Parameters.Clear();
                    command.Parameters.Add(new OracleParameter(":loginName", user.LoginName));
                    command.Parameters.Add(new OracleParameter(":pwd", user.Pwd));
                    command.CommandText = "select * from APP_ChatUser where loginname=:loginName and pwd=:pwd";
                    var reader = command.ExecuteReader();
                    User loginuser = new User();
                    try
                    {
                        reader.Read();
                        loginuser.UID = reader["USERID"].ToString();
                        loginuser.LoginName = reader["LOGINNAME"].ToString();
                        loginuser.Name = reader["NAME"].ToString();
                        loginuser.Pwd = reader["PWD"].ToString();
                        loginuser.CreateTime = Convert.ToDateTime(reader["CreateTime"]);
                        return new ResponseLoginState() { state = 1, msg = "success", user = loginuser };
                    }
                    catch (Exception ex)
                    {
    
                        return new ResponseLoginState() { state = 0, msg = ex.Message, user = null };
                    }
                }
                #endregion
            }
       }
    }
     
    通过访问api/ChatApp/Login就可以访问WebApi了
    JavaScript来检测WebApi                                                                   
    <!DOCTYPE html>
    <html xmlns="http://www.w3.org/1999/xhtml">
    <head>
    <meta http-equiv="Content-Type" content="text/html; charset=utf-8"/>
        <title></title>
        <script src="Scripts/jquery-1.10.2.min.js"></script>
        <script>
            var user;
            
            function login() {
                $.ajax({
                    url: '/api/ChatApp/Login',
                    type: 'POST',
                    dataType:'JSON',
                    data: { LoginName: 'zhangsan', Pwd: '123' },
                    success: function (data) {
                        if (typeof (data) != 'object')
                            data = JSON.parse(data);
                        user = data.Data.User;
                        alert(JSON.stringify(data));                   
                    }
                });
    
            }
    
        </script>
    </head>
    <body>
        <input type="button" value="登录" onclick="login()" />
    </body>
    </html>
    如果有不清楚,可以参照下面的这个网址学习http://www.asp.net/web-api/overview/getting-started-with-aspnet-web-api/tutorial-your-first-web-api
    学会勇敢
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  • 原文地址:https://www.cnblogs.com/Sir-Lin/p/4740873.html
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