C#利用反射获取实体类的主键名称或者获取实体类的值

 

//获取主键的 PropertyInfo
PropertyInfo pkProp = typeof(T).GetProperties().Where(p => p.GetCustomAttributes(typeof(KeyAttribute), false).Length >0).FirstOrDefault();
//主键名称
var keyName=pkProp.Name;
//实体类中主键的值
 var keyId = pkProp.GetValue(model).ToString();

例如：

public WorkIDStatusViewModel GetWorkIDStatusEntity<T>(string resourcesCode, IEnumerable<t_Work> work, T model)
        {
            PropertyInfo pkProp = typeof(T).GetProperties().Where(p => p.GetCustomAttributes(typeof(KeyAttribute), false).Length >0).FirstOrDefault();
            var resourcesId = pkProp.GetValue(model).ToString();

            var entity = work.Where(r => r.ResourcesCode == resourcesCode && r.ResourcesId == resourcesId).OrderByDescending(r => r.CreateDate).Select(s => new WorkIDStatusViewModel { WorkId = s.WorkId, Status = s.Status }).FirstOrDefault();
            if (entity != null)
                return new WorkIDStatusViewModel { WorkId = entity.WorkId, Status = entity.Status };
            else
                return new WorkIDStatusViewModel { WorkId = "", Status = -1 };
        }