Question

我正在尝试将两个值传递给MvxCommand，如下面的代码所示。第一个值是string类型，而第二个值是Enum。但是我收到以下错误：

currentYearSavingDays, currentYearSavingXMins, currentYearSavingNXMins, currentYearUsedDays, currentYearUsedXMins, yearLimitRemainingDays, yearLimitRemainingXMins, totalYearlyDays, totalYearlyXMins, totalSavingDays, totalSavingMins, totalUsableDays, totalUsableMins, nextYearTotalUsableDays, nextYearTotalUsableMins, dayWorkMinutes, previousYearRemainingDays, previousYearRemainingMins = 0;

请让我知道如何解决此错误。

代码：

    the non-generic type MvxCommand can’t be used with type arguments

Answer 1

非泛型MvxCommand不能与类型参数一起使用

这是源代码段：

namespace MvvmCross.Commands
   {
      public interface IMvxCommand : ICommand
        {
          void RaiseCanExecuteChanged();
          void Execute();
          bool CanExecute();
        }

      public interface IMvxCommand<T> : ICommand
        {
          [Obsolete("Use the strongly typed version of Execute instead", true)]
          new void Execute(object parameter);
          [Obsolete("Use the strongly typed version of CanExecute instead", true)]
          new bool CanExecute(object parameter);

          void RaiseCanExecuteChanged();

          void Execute(T parameter);

          bool CanExecute(T parameter);
        }
    }

您会看到IMvxCommand<T>参数是T

因此，如果您想传递两个参数，我认为您可以使用Tuple将它们变成单个对象。

例如

 new MvxCommand<Tuple<string, VRTEnum>>(Action);

无法将值从托管活动传递给MvxCommand

1 个答案: