摘要：The ObjectContext instance has been disposed and can no longer be used for operations that require a connection.How to solve the error The ObjectContext instance has been disposed and can no longer be used for operations that require a connection1.今天查询数据的出现对象已经被释放，然后字段属性为null。我下了断点检查了一下数据，是有值的。2.我发现 阅读全文