webapi创建及postman测试

Teamomc 2020-05-11

调用接口一般采用两种方式,webservice和webapi,此篇写webapi建立及测试

1.创建:

webapi创建及postman测试       webapi创建及postman测试

 2.添加控制器到Controller文件夹,新建Api文件夹,将该控制器文件放入Api下,打开App_Start文件夹下webapiconfig,修改路由

public static void Register(HttpConfiguration config)
        {
            config.Formatters.JsonFormatter.SupportedMediaTypes.Add(new MediaTypeHeaderValue("text/html"));
            config.Routes.MapHttpRoute(
                name: "DefaultApi",
                routeTemplate: "api/{controller}/{id}",
                defaults: new { id = RouteParameter.Optional }
            );

3.方法名定义注意点

a.如果方法名为post或者get,就是默认使用,在测试时,直接写到控制器LQInfo,然后传递方式设置为post即可,不需要写方法;

webapi创建及postman测试

b.如果自定义方法,选择方式为get或者post,那么需要写到具体方法getcode();

webapi创建及postman测试

在用 winform调用测试时,也需要写到方法:

private void button1_Click(object sender, EventArgs e)
        {

            string ashxSite = "http://localhost:80//ActionApi";
            var client = new RestClient(ashxSite);
            var request = new RestRequest("/UserInfo/GetCode", Method.GET);
            request.AddParameter("Barcode", "WLS000021");
            var response = client.Execute(request); // 从 WebAPI 获取 
            textBox2.Text = response.Content;

        }

4.参数注意点

a.如果参数只为一个:

[HttpPost]
        public string GetCode(string Barcode) {

            try
            {
                using (OracleConnection conn = new OracleConnection(connERP))
                {
                
                    string sql = @"select  trim(a.t$mitm ) 编码,trim(b.t$dsca) 名称 from tablea  a  join tableb b
                   on trim(a.t$pdno)=:a and a.t$mitm = b.t$item";

                    Object obj = conn.QueryFirstOrDefault(sql, new { a = Barcode });

                    if (obj != null)
                    {

                        string item = obj.ToString();

                        return item;
                    } 

                    else return null;
                }



            }
            catch (Exception ex) { return "Error." + ex.Message; }
           
        }

b.从URL获取参数值的方式的弊端是URL有长度限制,当超过浏览器的最大URL长度时请求将被浏览器拒绝,根本不会发出去。

因此,当参数值过大时需要用[FromBody]参数进行传输

public class AX
        {
            public string url { get; set; }
        }

        public  string Post([FromBody] AX arg )
     
        {

            
            //  传入的字符串:"action=search&arg1=" + user + "&arg2=" + ED_tiaoMa.getText().toString();
            //  先用&分割,再用=分割
            string ip = HttpContext.Current.Request.UserHostAddress;
            if (arg!= null && !string.IsNullOrEmpty(arg.url)) {

                log.DebugFormat("Post:{0}", arg.url);
                var tmps = arg.url.Split(‘&‘);
                string action = string.Empty;
                string arg1 = string.Empty;
                string arg2 = string.Empty;
                string arg3 = string.Empty;
                string arg4 = string.Empty;

                foreach (var item in tmps) {

                    var tmps2 = item.Split(‘=‘);
                    var s = tmps2[0].Trim().ToLower();   //第一个参数    方法
                    var _value = tmps2[tmps2.Length - 1].Trim();  //最后一个参数    
                    if (tmps2.Length < 2) 
                        _value = string.Empty;
                    if ("action".Equals(s, StringComparison.OrdinalIgnoreCase))
                        action = _value;
                    else if ("arg1".Equals(s, StringComparison.OrdinalIgnoreCase))
                        arg1 = _value;
                    else if ("arg2".Equals(s, StringComparison.OrdinalIgnoreCase))
                        arg2 = _value;
                    else if ("arg3".Equals(s, StringComparison.OrdinalIgnoreCase))
                        arg3 = _value;
                    else if ("arg4".Equals(s, StringComparison.OrdinalIgnoreCase))
                        arg4 = _value;
                    
                }

                log.DebugFormat("Post: {0} / {1} / {2} / {3} / {4} / {5}", action, arg1, arg2, arg3, arg4,  ip);
                if (string.IsNullOrWhiteSpace(action))
                    return "不支持此方法!";

                var a1 = action.Trim().ToLower();
                switch (a1)
                {
                    case "getcode":
                        {
                            try
                            {
                                using (OracleConnection conn = new OracleConnection(connErp))
                                {

                                    string sql = @"select  trim(a.t$mitm ) 编码,trim(b.t$dsca) 名称 from  tablea  a  join tableb b
                   on trim(a.t$pdno)=:a and a.t$mitm = b.t$item";

                                    Object obj = conn.QueryFirstOrDefault(sql, new { a = arg1 });

                                    if (obj != null)
                                    {

                                        string item = obj.ToString();

                                        return item;
                                    }

                                    else return null;
                                }

                            }
                            catch (Exception ex) { return "Error." + ex.Message; }                         
                        }

                        return action;

                
                }

            }


            return "Error." + arg.url;
       

        }

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