组合框选择的项目WPF

本文关键字：项目 WPF 选择 组合 | 更新日期: 2023-09-27 18:29:12

我尝试了一个从文件夹中检索视频名称的代码。当我从组合框中选择某个项目时，它不会在组合框选择中显示名称。我把所有的东西都看了一遍。但这些都没有解决问题。有什么建议吗。

代码

public partial class TextToSignWindow : Window
{
    public TextToSignWindow()
    {
        InitializeComponent();
        var rootFolder = System.IO.Path.GetDirectoryName(
        System.Reflection.Assembly.GetExecutingAssembly().GetName().CodeBase);
        var root = rootFolder + @"'Videos'";
        string localPath = new Uri(root).LocalPath;
        PopulateListBox(data,localPath, "*.wmv");
    }
    private void PopulateListBox(ComboBox cmb, string Folder, string FileType)
    {
        DirectoryInfo dinfo = new DirectoryInfo(Folder);
        FileInfo[] Files = dinfo.GetFiles(FileType);
        foreach (FileInfo file in Files)
        {
            var ext = Path.GetExtension(file.Name);
            var name = Path.GetFileNameWithoutExtension(file.Name);
            cmb.Items.Add(name);
        }
    }
    private void data_SelectionChanged_1(object sender, SelectionChangedEventArgs e)
    {
        data.SelectedValue =data.SelectedItem.ToString();
    }
}

WPF

<ComboBox x:Name="data" 
          IsEditable="True" 
          FontFamily="verdana" 
          IsSynchronizedWithCurrentItem="True" 
          FontSize="28" 
          Text="" 
          HorizontalAlignment="Left" 
          Height="81" 
          Margin="29,214,0,0" 
          VerticalAlignment="Top" 
          Width="326" 
          SelectionChanged="data_SelectionChanged_1" 
          SelectedItem="{Binding SelectedItem}" />

组合框选择的项目WPF

您需要包含DisplayMemberPath

<ComboBox x:Name="data" IsEditable="True" FontFamily="verdana" IsSynchronizedWithCurrentItem="True"  FontSize="28" Text=""  HorizontalAlignment="Left" Height="81" Margin="29,214,0,0" VerticalAlignment="Top" Width="326" SelectionChanged="data_SelectionChanged_1" SelectedItem="{Binding SelectedItem}" DisplayMemberPath="NameOfFieldToDisplay"/>

您可能还需要包括SelectedValuePath="NameOfSelectedValueField"

例如：DisplayMemberPath通常是您的描述字符串，SelectedValuePath是您的Id int。

这是我目前使用的代码的复制粘贴：

<ComboBox x:Name="comboBoxName" ItemsSource="{Binding ItemsList}" SelectedValuePath="Id" DisplayMemberPath="DisplayName" Width="300"  FontSize="14.667" SelectionChanged="comboBoxName_SelectionChanged">

我试过一个样品，它能

Xaml

 <ComboBox x:Name="data" IsEditable="True" FontFamily="verdana" IsSynchronizedWithCurrentItem="True"  FontSize="28" Text=""  HorizontalAlignment="Left" Height="81" Margin="29,214,0,0" VerticalAlignment="Top" Width="326" SelectionChanged="data_SelectionChanged_1"  />

背后的代码

 private void Window_Loaded(object sender, RoutedEventArgs e)
        {
            data.Items.Add("test");
            data.Items.Add("test1");
        }   
        private void data_SelectionChanged_1(object sender, SelectionChangedEventArgs e)
        {
            data.SelectedValue = data.SelectedItem.ToString();
        }

不要将您的组合框发送到功能

  private void PopulateListBox(string Folder, string FileType)
{
    DirectoryInfo dinfo = new DirectoryInfo(Folder);
    FileInfo[] Files = dinfo.GetFiles(FileType);
    foreach (FileInfo file in Files)
    {
        var ext = Path.GetExtension(file.Name);
        var name = Path.GetFileNameWithoutExtension(file.Name);
        data.Items.Add(name);
    }
}

如果你想发送，请参考

 private void PopulateListBox(ref ComboBox cmb, string Folder, string FileType)
    {
        DirectoryInfo dinfo = new DirectoryInfo(Folder);
        FileInfo[] Files = dinfo.GetFiles(FileType);
        foreach (FileInfo file in Files)
        {
            var ext = Path.GetExtension(file.Name);
            var name = Path.GetFileNameWithoutExtension(file.Name);
            cmb.Items.Add(name);
        }
    }
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