我的项目需要专家帮助。 请帮助我，我是WPF的新手，我正在使用VB.NET创建应用程序来显示用户选择的文件夹中的图片。在Form I上放置Button（按下以选择文件夹），Image（显示从ListView中选择的图像），ListView（2列，第1列图像缩略图，第2列，文件名）。 请检查下面的XAML代码：
<Window
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:System="clr-namespace:System;assembly=mscorlib" x:Class="MainWindow"
Title="MainWindow" Height="448.545" Width="698.135">
<Grid>
<Image x:Name="ImgView" Margin="259,44,10,72"/>
<Button Content="Pilih Folder" HorizontalAlignment="Left" Height="29" Margin="10,10,0,0" VerticalAlignment="Top" Width="92" Click="Button_Click"/>
<ListView x:Name="ListView1" HorizontalAlignment="Left" Height="351" Margin="10,44,0,0" VerticalAlignment="Top" Width="244">
<ListView.View>
<GridView>
<GridViewColumn Header="Gbr" DisplayMemberBinding="{Binding Gambar}"/>
<GridViewColumn Header="Nama File" DisplayMemberBinding="{Binding NamaFile}"/>
</GridView>
</ListView.View>
</ListView>
</Grid>
</Window>
这是我的代码隐藏
Imports System.Windows.Forms
Imports System.Collections.ObjectModel
Class MainWindow
Private _GbrCollection As New ObservableCollection(Of GambarCol)
Public ReadOnly Property GbrCollection() As ObservableCollection(Of GambarCol)
Get
Return _GbrCollection
End Get
End Property
Private Sub MainWindow_Loaded(sender As Object, e As RoutedEventArgs) Handles Me.Loaded
InitializeComponent()
End Sub
Private Sub Button_Click(sender As Object, e As RoutedEventArgs)
Dim ImgList() As Image
Dim Img88 As Image
Dim fld As New FolderBrowserDialog
fld.RootFolder = Environment.SpecialFolder.Desktop
'fldDialog.RootFolder = Environment.SpecialFolder.Desktop;
fld.ShowDialog()
'txtPath.Text = fld.SelectedPath
'filesListBox.Items.Clear()
Dim fileNames = My.Computer.FileSystem.GetFiles(fld.SelectedPath, FileIO.SearchOption.SearchTopLevelOnly, "*.jpg")
'Debug.WriteLine(fileNames.Count)
ReDim ImgList(fileNames.Count)
For Each fileName As String In fileNames
_GbrCollection.Add(New GambarCol(Img88, fileName))
Next
ListView1.ItemsSource = GbrCollection
End Sub
Private Sub ListView1_MouseDoubleClick(sender As Object, e As MouseButtonEventArgs) Handles ListView1.MouseDoubleClick
Dim ImgShow As New Image
If ListView1.SelectedItems.Count > 0 Then
End If
'ImgShow.Source = New BitmapImage(New System.Uri(ListView1.Items))
End Sub
Private Sub ListView1_SelectionChanged(sender As Object, e As SelectionChangedEventArgs) Handles ListView1.SelectionChanged
End Sub
End Class
Public Class GambarCol
Private _Gambar As Image
Private _NamaFile As String
Public ReadOnly Property Gambar() As Image
Get
_Gambar = New Image
_Gambar.Source = New BitmapImage(New System.Uri(NamaFile))
_Gambar.Height = 60
Return _Gambar
End Get
End Property
Public ReadOnly Property NamaFile() As String
Get
Return _NamaFile
End Get
End Property
Public Sub New(ByVal GbrImg As Image, ByVal NamaFileNF As String)
_Gambar = GbrImg
_NamaFile = NamaFileNF
End Sub
End Class
师父，帮我解决3个问题： 1.图像无法显示在Listview的第1列中 2.当用户双击所选行时，如何从第2列获取值 3.我知道我的代码太复杂了，有人可以帮我简单吗
真的需要帮助
非常感谢
答案 0 :(得分：0)
我刚刚发现了解决方案，在多次引用其他文章后，我就是这样做的。 在StackPanel上构建的XAML代码用于保存第一个col的Image，第二个col保持
<Window x:Class="MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
Title="MainWindow" Height="409.574" Width="580.224">
<Grid>
<ListView x:Name="ListView1" VirtualizingStackPanel.IsVirtualizing="True" ItemsSource="{Binding ListViewItemsCollections}" Margin="0,56,0,10" HorizontalAlignment="Left" Width="228">
<ListView.View>
<GridView AllowsColumnReorder="False">
<GridViewColumn x:Name="GridViewColumnName" Header="Picture" Width="90">
<GridViewColumn.CellTemplate>
<DataTemplate>
<StackPanel Orientation="Horizontal">
<Image x:Name="Image_GridViewColumnName" Width="90" Height="50" Source="{Binding GridViewColumnNameImageSource}" />
<Label Content="{Binding GridViewColumnNameLabelContent}" Width="50" Height="50" />
</StackPanel>
</DataTemplate>
</GridViewColumn.CellTemplate>
</GridViewColumn>
<GridViewColumn x:Name="GridViewColumnLocation" Header="Location" Width="150" DisplayMemberBinding="{Binding GridViewColumnLocation}" />
</GridView>
</ListView.View>
</ListView>
<Button x:Name="btnFolder" Content="Pilih Folder" Margin="10,10,0,0" Height="41" VerticalAlignment="Top" HorizontalAlignment="Left" Width="77"/>
<TextBox x:Name="txtPath" Height="23" Margin="112,10,0,0" TextWrapping="Wrap" VerticalAlignment="Top" HorizontalAlignment="Left" Width="116"/>
<Image x:Name="ImgView" Margin="247,56,10,113"/>
</Grid>
</Window>
而对于代码，只需使用带有NEW键的Add方法，坦率地说我还是不明白New背后的概念，因为WPF对我来说真的很新，VB.NET仍然不是全部100％我可以编码。 对于代码隐藏如下
Imports System.Windows.Forms.ListViewItem.ListViewSubItemCollection
Imports System.IO
Imports System.Windows.Window
Imports System.Windows.Forms
Imports System.Windows.Forms.FolderBrowserDialog
Class MainWindow
Dim IsiFile() As String
Private Sub btnFolder_Click(sender As Object, e As RoutedEventArgs) Handles btnFolder.Click
Dim fld As New FolderBrowserDialog
Dim iCnt As Integer = 0
fld.RootFolder = Environment.SpecialFolder.Desktop
fld.ShowDialog()
txtPath.Text = fld.SelectedPath
Dim fileNames = My.Computer.FileSystem.GetFiles(fld.SelectedPath, FileIO.SearchOption.SearchTopLevelOnly, "*.jpg")
ReDim IsiFile(fileNames.Count)
For Each fileName As String In fileNames
ListView1.Items.Add(New With { _
Key .GridViewColumnLocation = fileName, _
Key .GridViewColumnNameImageSource = fileName _
})
IsiFile(iCnt) = fileName
iCnt += 1
Next
End Sub
Private Sub ListView1_MouseDoubleClick(sender As Object, e As MouseButtonEventArgs) Handles ListView1.MouseDoubleClick
Dim Gambar As New BitmapImage
Gambar.BeginInit()
Gambar.UriSource = New Uri(IsiFile(ListView1.SelectedIndex))
Gambar.EndInit()
ImgView.Source = Gambar
End Sub
End Class
我希望这有帮助，谢谢