public SearchViewModel()
{
SearchHistoryList = new ObservableCollection <string>();
//InitSearchPage();
SearchCommand = new Command <string>(async(str) =>
{
if (!Tools.IsNetConnective())
{
CrossToastPopUp.Current.ShowToastError("无网络连接，请检查网络。", ToastLength.Long);
return;
}
if (string.IsNullOrEmpty(str))
{
CrossToastPopUp.Current.ShowToastWarning("请输入关键词", ToastLength.Short);
}
else
{
if (!SearchHistoryList.Contains(str))
{
SearchedItem searchedItem = new SearchedItem
{
createTime = DateTime.UtcNow.ToString(),
searchedString = str
};
await LocalDatabaseHelper <SearchedItem> .InsertOrReplaceAsync(searchedItem);
}
ProductListPage productListPage = new ProductListPage(str);
SearchString = "";
await Application.Current.MainPage.Navigation.PushAsync(productListPage);
}
}, (str) => { return(true); });
ClearCommand = new Command(async() =>
{
bool action = await Application.Current.MainPage.DisplayAlert("确认", "删除所有搜索历史？", "确认", "取消");
if (action)
{
await localDatabaseService.DeleteAllSearchedItem();
InitSearchPage();
}
}, () => { return(true); });
}
