public AppViewModel(TestDbContext dbContext) { _dbContext = dbContext; StatisticByCountry = new StatisticOfRegistarionsViewModel((x) => dbContext.GetStatisticOfRistrationsByCountry()) { GroupColumnHeader = "Страна" }; StatisticByRegion = new StatisticOfRegistarionsViewModel((country) => dbContext.GetStatisticOfRistrationsByRegion(country), dbContext.GetCountryList()) { GroupColumnHeader = "Регион" }; StatisticByMonth = new StatisticOfRegistarionsViewModel((year) => dbContext.GetStatisticOfRistrationsByMonth(year), dbContext.GetYearList()) { GroupColumnHeader = "Месяц" }; }