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  • LINQ关联表查询语法和.NET扩展方法和JSON.NET时间格式化代码段

      

      

     public void ProcessRequest(HttpContext context)
        {
            context.Response.ContentType = "text/plain";
            string customerid = context.Request["customerid"];
            using (CrcShDbDataContext crc = new CrcShDbDataContext())
            {
                var query = from a in crc.dbo_pre_database_phone
                            join b in crc.dbo_pre_database_extinfo on a.phoneID equals b.phoneID
                            where a.客户ID == Int32.Parse(customerid)
                            orderby a.phoneID
                            select new
                            {
                                a.客户ID,
                                a.phoneID,
                                a.ph,
                                b.extinfoID,
                                b.Mail,
                                b.MSN,
                                b.QQ,
                                b.创建时间,
                                b.官网,
                                b.决策类型,
                                b.联系地址,
                                b.联系公司名,
                                b.联系人,
                                b.其他联系方式,
                                b.性别,
                                b.职务,
                                来源 = crc.dbo_pre_database_src.Where(n => n.extinfoID == b.extinfoID).ExtensionQueryable()//关联子
                            };
    
                var dataobj = new { rows = query, total = query.Count() };
                
                //JSON.NET格式化时间
                var timeConverter = new Newtonsoft.Json.Converters.IsoDateTimeConverter();
                timeConverter.DateTimeFormat = "yyyy'-'MM'-'dd' 'HH':'mm':'ss";
                
                var jsonstr = Newtonsoft.Json.JsonConvert.SerializeObject(dataobj, Newtonsoft.Json.Formatting.Indented, timeConverter);
                context.Response.Write(jsonstr);
    
    
            }
        }

    ExtensionQueryable扩展方法
    public static class ExtensionIQueryable
    {
    
        public static string ExtensionQueryable(this IQueryable<dbo_pre_database_src> queryable)
        {
            StringBuilder sb = new StringBuilder();
            foreach (var s in queryable)
            {
                sb.Append(s.source);
                sb.Append("&");
            }
            if (sb.Length > 0)
            {
                sb.Remove(sb.Length - 1, 1);
            }
    
            return sb.ToString();
        }
    
    
    
    
    }





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  • 原文地址:https://www.cnblogs.com/gouyanfeng/p/3680087.html
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