列表框未使用绑定填充 [英] Listbox is not Populating using binding

问题描述

我正在尝试使用mvvm模式在c#wpf中转换现有程序.

I am trying to convert my existing program in c# wpf, using mvvm pattern.

第一部分是选择要处理的文件的文件夹"位置并填充列表框

The first part is select the Folder location of the files to be process and populate the listbox

我在这里找到了使用Mvvm Light的示例:具有MVVM模式的WPF OpenFileDialog?

I found an example here using Mvvm Light: WPF OpenFileDialog with the MVVM pattern?

上面链接中的示例是选择一个文件夹.

the example in the link above is selecting a Folder.

这是我项目的结构

this is the structure of my project

这是我的FileListView.xaml的代码

this is the code of my FileListView.xaml

<UserControl x:Class="MvvmLight1.Views.FilesListView"
             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:MvvmLight1.Views"
             mc:Ignorable="d" 
             d:DesignHeight="300" Width="730.029">

    <Grid>
        <ListBox ItemsSource="{Binding FileNames}" Margin="5,5,5,5"/>

    </Grid>
</UserControl>

这是我的列表，它位于ViewModel \ OpenFileDialogVM.cs

this is my list which reside in ViewModel\OpenFileDialogVM.cs

public System.Collections.ObjectModel.ObservableCollection<string> FileNames { get; }
    = new System.Collections.ObjectModel.ObservableCollection<string>();

这是我用于填充列表的代码.但这不起作用

this is my code for populating the list. but it doesn't work

var files = System.IO.Directory.EnumerateFiles(SelectedPath, "*", System.IO.SearchOption.AllDirectories);

            FileNames.Clear();

            foreach (var file in files)
            {
                FileNames.Add(file);
                Console.WriteLine(file);
            }

我上面的代码有什么问题?

What is wrong with my code above?

代码更新:

在我的文件夹结构上，我有ViewModel文件夹，在其中有OpenFileDialogVm.css

On my folder structure I have ViewModel Folder and inside it I have OpenFileDialogVm.css

但是为什么IDE只识别ViewModelLocator.

but why is it that the IDE only recognize the ViewModelLocator.

我什至构建项目.

我什至在FileListView用户控件的CodeBehind中设置了DataContext，但仍然没有填充列表框

I even set the DataContext in the CodeBehind of FileListView user control but still it doesn't populate the listbox

public partial class FilesListView : UserControl
    {
        public FilesListView()
        {
            DataContext = new OpenFileDialogVM();
            InitializeComponent();

        }
    }

推荐答案

将其添加到您的UserControl中:

Add it to your UserControl:

<UserControl
.....
xmlns:viemodels="clr-namespace:MvvmLight1.ViewModels"
/>
    <UserControl.DataContext>
        <viemodels:OpenFileDialogVM/>
    </UserControl.DataContext>
....
</UserControl>

这篇关于列表框未使用绑定填充的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！