LINQ to JSON：InvalidOperationException：Lambda参数不在范围内

Question

我正在尝试执行LINQ to JSON的示例代码（如下所述）但是它给了我以下错误

堆栈追踪：

  

[InvalidOperationException：Lambda参数不在范围内]

我正在执行的代码是：

      JObject rss =
          new JObject(

                new JProperty("id", "James Newton-King"),
                new JProperty("name", "http://james.newtonking.com"),
                new JProperty("data", "James Newton-King's blog."),
                new JProperty("children",
                  new JArray(
                    from p in mwsysbot.Software
                    where p.SoftwareName == name
                    select new JObject(                            
                      new JProperty("id",p.SoftwareUUID),
                      new JProperty("name", p.SoftwareName)         
                    )
                  )
                 )
               );

此外，当我删除行“new JProperty（”name“，p.SoftwareName）时”代码执行完美。

为什么？

Answer 1

我试过这个，它对我有用......

     IQueryable<Software> soft = (from s in mwsysbot.Software
                                                     select s).ToList();

JObject rss =
           new JObject(
                     new JProperty("id", "James Newton-King"),
                     new JProperty("name", "http://james.newtonking.com"),
                     new JProperty("data", "James Newton-King's blog."),
                     new JProperty("children", new JArray(
                         from m in soft
                         select new JObject(
                             new JProperty("id",m.SoftwareName),
                             new JProperty("name", m.SoftwareName),
                             new JProperty("children",new JArray())
                             )
                         ))


             );

我不知道原因！

我们只能在上面使用“List”数据结构吗？

Answer 2

Linq可能会尝试延迟加载SoftwareName。在创建新对象之前，尝试使用DTO并急切加载参数名称。