2018年12月9日
The expected type was 'System.Int64' but the actual value was null.”
摘要： System.InvalidOperationException:“An exception occurred while reading a database value for property 'Banner.CreateUser'. The expected type was 'System.Int64' but the actual value was null.” 阅读全文
posted @ 2018-12-09 01:03 阿水zev 阅读(815) 评论(0) 推荐(0) 编辑
AddDbContext was called with configuration, but the context type 'NewsContext' only declares a parameterless constructor?
摘要： 问题 原因 NewsContext.cs Startup.cs 该错误表示，如果通过AddDbContext配置NewsContext，那么需要添加一个DbContextOptions<NewsContext>类型参数的构造函数到NewsContext类。否则.net core 不能注入时带上Add 阅读全文
posted @ 2018-12-09 00:51 阿水zev 阅读(2094) 评论(0) 推荐(0) 编辑