根據布爾值更改ListView中的image.Source

Question

我有一個包含2列的listview：系統的“可見性”和“名稱”。 第1列的值：帶有圖像（img_visibility）的按鈕（btn_visibility）。

根據圖像后面代碼中對象的布爾值（真或假），應該更改，例如SYSTEM.SHOW_IN_LIST = true; img_visibility.Source =新的BitmapImage（新的Uri（App.CONTROLLER.PATHS.PATH_TO_MINUS））;

在以下相對路徑下可以訪問圖像：App.CONTROLLER.PATHS.PATH_TO_“我的圖像名稱”，例如App.CONTROLLER.PATHS.PATH_TO_ADD；

我在SystemmanagementWindow.xaml中的xaml代碼：

<ListView x:Name="lv_Systems" HorizontalAlignment="Left" Height="227" Margin="313,5,0,0" VerticalAlignment="Top" Width="153" SelectedIndex="0" SelectionChanged="listView_Systems_SelectionChanged">
        <ListView.View>
            <GridView>
                <GridViewColumn Header="{x:Static p:Resources.SystemmanagementWindow_listView_col_1}" DisplayMemberBinding="{Binding SYSTEMNAME}" Width="110"/>
                <GridViewColumn Header="{x:Static p:Resources.SystemmanagementWindow_listView_col_2}"  Width="34">
                    <GridViewColumn.CellTemplate>
                        <DataTemplate>
                            <Button Click="EditVisibility" CommandParameter="{Binding}" Width="20">
                                <Image x:Name="img_visibility" width="10" Height="10"/>
                            </Button>
                        </DataTemplate>
                    </GridViewColumn.CellTemplate>
                </GridViewColumn>
            </GridView>
        </ListView.View>
    </ListView>

提前謝謝了！

Answer 1

對於那些正在尋找解決方案的人：

BoolToImageConverter.cs：

public class BoolToImageConverter : IValueConverter
{
    public object Convert(object value, System.Type targetType, object parameter, System.Globalization.CultureInfo culture)
    {
        return (bool)value ? "D:\\Test\\Test\\bin\\Debug\\img\\add.png" : "D:\\Test\\Test\\bin\\Debug\\img\\minus.png";
    }

    public object ConvertBack(object value, System.Type targetType, object parameter, System.Globalization.CultureInfo culture)
    {
        return false; // not needed
    }
}

在這里找到： https : //social.msdn.microsoft.com/Forums/vstudio/en-US/b0be201f-cd9a-4cde-b3f8-35014c4ca485/wpf-how-to-show-some-items-and-hide-some -items-IN-A-列表視圖個鹼基上-A-布爾值？論壇= WPF

編輯了MainWindow.xaml以與多列listview並行工作：

<Window.Resources>
    <local:BoolToImageConverter x:Key="image_converter"/>
    <local:BoolToTooltipConverter x:Key="tooltip_converter"/>
</Window.Resources>
[...]
<ListView x:Name="listView" ItemsSource="{Binding List}">
    <ListView.View>
        <GridView>
            <GridViewColumn Header="System" DisplayMemberBinding="{Binding Name}" Width="100"/>
            <GridViewColumn Header="Status">
                <GridViewColumn.CellTemplate>
                    <DataTemplate>
                        <Button ToolTip="{Binding IsActive, Converter={StaticResource tooltip_converter}}">
                            <Image Source="{Binding IsActive, Converter={StaticResource image_converter}}" Width="15"/>
                        </Button>
                    </DataTemplate>
                </GridViewColumn.CellTemplate>
            </GridViewColumn>
        </GridView>
    </ListView.View>
</ListView>

只需將以下行添加到MainWindow.cs即可查看結果：

var list = new List<object>();
list.Add(new { Name = "First Name", IsActive = true });
list.Add(new { Name = "Second Name", IsActive = true });
list.Add(new { Name = "Third Name", IsActive = false });
list.Add(new { Name = "Fourth Name", IsActive = true });
list.Add(new { Name = "Fifth Name", IsActive = false });
list.Add(new { Name = "Sixth Name", IsActive = true });
list.Add(new { Name = "Seventh Name", IsActive = true });
DataContext = new { List = list };

希望這可以幫助。