0
主窗口:行动未运行
<Window x:Class="Generator.MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
xmlns:ignore="http://www.galasoft.ch/ignore"
mc:Ignorable="d ignore"
Height="309.851"
Width="673.433"
Title="Generator"
DataContext="{Binding Main, Source={StaticResource Locator}}">
<Grid x:Name="LayoutRoot">
<Frame x:Name="MainFrame" Content="" NavigationUIVisibility="Hidden" HorizontalAlignment="Left" Height="235" Margin="0,36,0,0" VerticalAlignment="Top" Width="294" Source="/Generator;component/Pages/TCPage.xaml"/>
</Grid>
</Window>
这是内框架的页面
<Page x:Class="Generator.Pages.TCPage"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:local="clr-namespace:Generator.Pages"
mc:Ignorable="d"
d:DesignHeight="300" d:DesignWidth="300"
DataContext="{Binding TCPageVM, Source={StaticResource Locator}}"
Title="TCPage">
<Grid>
<Button x:Name="button" Content="Jobby" HorizontalAlignment="Left" Margin="160,185,0,0" VerticalAlignment="Top" Width="75"
Command="{Binding ButtonCommandNew}" />
</Grid>
</Page>
这是在页面的模型视图的按钮命令(TCPageVM):
private bool _inProgress = false;
private RelayCommand _buttonCommandNew;
public RelayCommand ButtonCommandNew
{
get
{
var worker = new TCService();
return _buttonCommandNew
?? (_buttonCommandNew = new RelayCommand(async() =>
{
var progress = new Progress<string>(status =>
{
ProgressText = status;
});
_inProgress = true;
_buttonCommandNew.RaiseCanExecuteChanged();
await worker.GenerateConfiguration(1, "", "", progress);
_inProgress = false;
_buttonCommandNew.RaiseCanExecuteChanged();
},() => !_inProgress
));
}
}
这是服务执行:
public Task<bool> GenerateConfiguration(int cellCount, string templateFilePath, string outputFilePath, IProgress<string> progress)
{
return Task.Run(() => RunConfigurator(progress));
}
private bool RunConfigurator(IProgress<string> progress)
{
Thread.Sleep(6000);
progress.Report("Yeah!");
return true;
}
问题是该按钮已启用,但操作未运行。
完美答案。只是最后一个问题 - 你认为我启用/禁用按钮的方式是唯一的方法吗?我的意思是那些'RaiseCanExecuteChanged'对我来说看起来很丑,我试图将它移到服务逻辑。没有调用'RaiseCanExecuteChanged'就可以离开吗? – Pablo
每当条件改变时你都需要调用'RaiseCanExecuteChanged'。没有得到解决。我会做的是让'inProgress'属性,并从setter调用'ButtonCommandNew.RaiseCanExecuteChanged();'。然后,你可以从任何地方改变'inProgress',UI将被更新。 – FUR10N