如何使用entities.Database.SqlQuery获取字段的所有值?

如何解决如何使用entities.Database.SqlQuery获取字段的所有值?

我有一个存储过程,该存储过程可能返回一个字段的多个值。

例如:

enter image description here

我需要创建一个API来获取同一字段的所有值。

我的控制器具有以下代码:

public partial class get_active_call_info_id_Result
    {
        public int call_info_id { get; set; }
    }

public partial class error_message
        {
            public int StatusCode { get; set; }
        }

[BasicAuthentication]
        [Route("getactivecallinfoid")]
        [HttpPost,ActionName("getactivecallinfoid")]
        public System.Web.Http.Results.JsonResult<String> GetACII(String u_id)
        {
            //var data = (dynamic)null;
            using (EMSMVCEntities entities = new EMSMVCEntities())
            {
                String jsonResult = null;
                String jsonResult_log = null;

                entities.Configuration.ProxyCreationEnabled = false;
                var query = entities.Database.SqlQuery<get_active_call_info_id_Result>("exec [dbo].[get_active_call_info_id] @user_id",new SqlParameter("user_id",u_id))
                    .Select(x => new
                    {   
                        x.call_info_id,StatusCode = 1 //Success StatusCode
                    }).ToList();

                bool isEmpty = !query.Any();
                if (isEmpty)
                {
                    error_message error_status = new error_message()
                    {
                        StatusCode = 0
                    };

                    jsonResult = JsonConvert.SerializeObject(error_status);
                  
                }
                else
                {
                    jsonResult = JsonConvert.SerializeObject(query[0]); // <-- using Newtonsoft.Json
                   
                }

                return Json(jsonResult);
            }
        }

我通过POSTMAN调用此API的结果是:

"{\"call_info_id\":3,\"StatusCode\":1}"

正确的应该是这样的:

"{\"call_info_id\":3,\"call_info_id\":4,\"StatusCode\":1}"

解决方法

我使用dictionary找到了解决方案:

[BasicAuthentication]
[Route("getactivecallinfoid")]
[HttpPost,ActionName("getactivecallinfoid")]
public System.Web.Http.Results.JsonResult<String> GetACII(String u_id)
        {
            using (EMSMVCEntities entities = new EMSMVCEntities())
            {
                String jsonResult = null;
                String jsonResult_log = null;

                entities.Configuration.ProxyCreationEnabled = false;
                   
                var query_pre = entities.Database.SqlQuery<get_active_call_info_id_Result>("exec [dbo].[get_active_call_info_id] @user_id",new SqlParameter("user_id",u_id))
                    .ToList();

                var query = new Dictionary<String,String>();
                int counter = 1;
                foreach (var item in query_pre)
                { 
                    query.Add("call_info_id_"+counter.ToString(),item.call_info_id.ToString());
                    counter += counter;
                };
                query.Add("StatusCode","1");
                bool isEmpty = !query.Any();
                if (isEmpty)
                {
                    error_message error_status = new error_message()
                    {
                        StatusCode = 0
                    };

                    jsonResult = JsonConvert.SerializeObject(error_status);
                }
                else
                {
                    jsonResult = JsonConvert.SerializeObject(query); // <-- using Newtonsoft.Json
                }

                return Json(jsonResult);
            }
        }

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