Update Listview с моделью просмотра с нажатием кнопки

Question

Я хочу иметь возможность обновлять список, когда пользователь нажимает на элемент списка (строка) и нажимает кнопку. Вот мой код:

XAML

<Window x:Class="CS3000Config2.Dialogs.Clone" 
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" 
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" 
xmlns:local="clr-namespace:CS3000Config2" 
Title="Clone Scanner Configuration" Height="768" Width="1024" FontSize="16" WindowStyle="ToolWindow" WindowStartupLocation="CenterScreen" ResizeMode="NoResize" Loaded="Window_Loaded"> 
<Window.Resources> 
    <local:ScannerViewModel x:Key="ViewModel" /> 
</Window.Resources> 
<Window.Background> 
    <LinearGradientBrush EndPoint=".5,1" StartPoint=".5,0"> 
     <GradientStop Color="#b8e1fc" Offset="0" /> 
     <GradientStop Color="#a9d2f3" Offset="0.10" /> 
     <GradientStop Color="#90bae4" Offset="0.25" /> 
     <GradientStop Color="#90bcea" Offset="0.37" /> 
     <GradientStop Color="#90bff0" Offset=".50" /> 
     <GradientStop Color="#6ba8e5" Offset=".51" /> 
     <GradientStop Color="#a2daf5" Offset=".83" /> 
     <GradientStop Color="#bdf3fd" Offset="1" /> 
    </LinearGradientBrush> 
</Window.Background> 

<DockPanel> 
    <Grid> 
     <DockPanel Height="650" Margin="50,40,50,0" Width="800" VerticalAlignment="Top" Background="White"> 
      <Grid> 
       <ToolBar Height="46" Margin="0,6,-11,0" Name="toolBar1" VerticalAlignment="Top" ToolBarTray.IsLocked="True" BorderBrush="Black" BorderThickness=".5" Loaded="toolBar1_Loaded"> 
        <Button ToolBar.OverflowMode="AsNeeded" Click="Button_Click" Name="btnLoadToSelected"> 
         <StackPanel Orientation="Horizontal" VerticalAlignment="Center" > 
          <StackPanel.Resources> 
           <Style TargetType="{x:Type TextBlock}"> 
            <Setter Property="Margin" Value="10,0,0,0"/> 
           </Style> 
          </StackPanel.Resources> 
          <Image Source="/CS3000Config2;component/Resources/dsave.png" /> 
          <TextBlock VerticalAlignment="Center" FontSize="16" Margin="5,0,0,0">Load To Selected Scanners</TextBlock> 
         </StackPanel> 
        </Button> 
        <Separator /> 
        <Button ToolBar.OverflowMode="Never" Click="Button_Click_2" Name="btnLoadToAll"> 
         <StackPanel Orientation="Horizontal" VerticalAlignment="Center" > 
          <StackPanel.Resources> 
           <Style TargetType="{x:Type TextBlock}"> 
            <Setter Property="Margin" Value="10,0,0,0"/> 
           </Style> 
          </StackPanel.Resources> 
          <Image Source="/CS3000Config2;component/Resources/document-save-all2.png" /> 
          <TextBlock VerticalAlignment="Center" FontSize="16" Margin="5,0,0,0"> Load To All Scanners</TextBlock> 
         </StackPanel> 
        </Button> 
        <Separator /> 
        <Button ToolBar.OverflowMode="Never" Click="Button_Click_1"> 
         <StackPanel Orientation="Horizontal" VerticalAlignment="Center" > 
          <StackPanel.Resources> 
           <Style TargetType="{x:Type TextBlock}"> 
            <Setter Property="Margin" Value="10,0,0,0"/> 
           </Style> 
          </StackPanel.Resources> 
          <Image Source="/CS3000Config2;component/Resources/refresh.gif" /> 
          <TextBlock VerticalAlignment="Center" FontSize="16" Margin="5,0,0,0"> Refresh Scanner List</TextBlock> 
         </StackPanel> 
        </Button> 
        <Separator /> 
       </ToolBar> 
       <ScrollViewer Margin="6.5,58,6,6" HorizontalScrollBarVisibility="Auto" VerticalScrollBarVisibility="Auto" > 
        <Grid DataContext="{Binding Source={StaticResource ViewModel}}" Name="grid1"> 


         <ListView Margin="0,5" Name="listView1" SelectionMode="Multiple" ItemsSource="{Binding Scanners}"> 
          <ListView.View> 
           <GridView> 
            <GridViewColumn Header="" Width="100"> 
             <GridViewColumn.CellTemplate> 
              <DataTemplate> 
               <Image Height="50" Source="/CS3000Config2;component/Resources/cs3000-small.png" /> 
              </DataTemplate> 
             </GridViewColumn.CellTemplate> 
            </GridViewColumn> 
            <GridViewColumn Header="Drive" Width="50" DisplayMemberBinding="{Binding Drive}" /> 
            <GridViewColumn Header="Model" Width="100" DisplayMemberBinding="{Binding Model}" /> 
            <GridViewColumn Header="Serial" Width="200" DisplayMemberBinding="{Binding Serial}" /> 
            <GridViewColumn Header="" Width="325" > 
             <GridViewColumn.CellTemplate> 
              <DataTemplate> 
               <ProgressBar Name="prog1" Visibility="{Binding isVisible, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}" Maximum="{Binding maxProgress, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}" Value="{Binding progress, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}" Height="20" Width="200" /> 
              </DataTemplate> 
             </GridViewColumn.CellTemplate> 
            </GridViewColumn> 
           </GridView> 
          </ListView.View> 
         </ListView> 

        </Grid> 
       </ScrollViewer> 
      </Grid> 
     </DockPanel> 

    </Grid> 
</DockPanel> 

View Model (ScannerViewModel.cs)

public class ScannerViewModel : INotifyPropertyChanged 
{ 

    private String[] scanners; 

    ObservableCollection<Scanner> items = new ObservableCollection<Scanner>(); 
    private ArrayList driveList = new ArrayList(); 
    public ScannerViewModel() 
    { 
     GetDrives(); 
     scanners = (String[])driveList.ToArray(typeof(String)); 

     if (scanners.Length <= 0) 
     { 
      return; 
     } 
     else 
     { 
      foreach (String scnr in scanners) 
      { 
       Config c = new Config(); 
       c.LoadSysInfo(scnr + "\\Parameters\\SYSINFO.TXT"); 

       ProgressBar progBar = new ProgressBar(); 
       progBar.Height = 20; 
       progBar.Width = 150; 

       items.Add(new Scanner() { Drive = scnr, Model = c.Model, Serial = c.Serial, maxProgress = 10000, progress = 0, isVisible= Visibility.Hidden }); 
      } 
     } 
    } 
    private void GetDrives() 
    { 
     driveList.Clear(); 
     foreach (DriveInfo info in DriveInfo.GetDrives()) 
     { 
      if (info.DriveType == DriveType.Removable) 
      { 

       if (Directory.Exists(info.RootDirectory.ToString() + "Parameters")) 
       { 

        driveList.Add(info.RootDirectory.ToString()); 
       } 
      } 
     } 
    } 

    public ObservableCollection<Scanner> Scanners 
    { 

     get 
     { 
      return items; 
     } 
     set 
     { 
      items = value; 
      RaisePropertyChanged("Scanners"); 
     } 
    } 


    public event PropertyChangedEventHandler PropertyChanged; 

    private void RaisePropertyChanged(string propertyName) 
    { 
     PropertyChangedEventHandler handler = PropertyChanged; 
     if (handler != null) 
     { 
      handler(this, new PropertyChangedEventArgs(propertyName)); 
     } 
    } 
    } 
} 

Модель класса (Scanner.cs)

public class Scanner 
{ 
    public String Model { get; set; } 
    public String Serial { get; set; } 
    public Visibility isVisible { get; set; } 
    public String Drive { get; set; } 
    public Int32 progress { get; set; } 
    public Int32 maxProgress { get; set; } 
} 
} 

Может кто-то расскажет мне, как обновить одну из строк списка и сделать индикатор выполнения видимым, если пользователь нажимает на строку в представлении списка и нажимает кнопку «Загрузить на сканер»? Код кнопки с кодом кнопки будет оценен по достоинству.

Answer 1

Попробуйте

1- в VM создать список для хранения выбранных элементов, например ObservableCollection SelectedScanners {получить, набор;} 2- В вашей XAML, свяжите SelectedItem в ListView к вышеупомянутому 3 - Создание ICommand для кнопок

public ICommand UpdateScannersCommand 
{ 
    get 
    { 
     return new RelayCommand(()=> 
{ 
... update code here 
} 
} 
} 

4- Удалить свойство Visibility и использовать логическое значение вместо (и использовать преобразователь в XAML для определения видимости)