绑定DataContext窗口到ViewModel



好吧,我尝试了几种方法,但是在我的情况下,没有一个可以正常工作。我有一个带有单个组合的简单窗口。我正在将代码更改为MVVM,因此现在所有内容仍在代码中,应该转到ViewModel等。
但是,即使在第一步(将视图模型绑定到视图/窗口(,我似乎也无法将它们绑定在一起。


我的窗口xaml:

<Window x:Class="CustomerGuidance.ClientWindow"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:VM="clr-namespace:CustomerGuidance.ViewModels"
    Title="Stop'n'Go - Client" Height="22" Width="229"
    Loaded="ClientWindow_OnLoaded" WindowStyle="None" 
    WindowStartupLocation="Manual" Top="0" Left="0"
    ResizeMode="NoResize" ShowInTaskbar="False" Topmost="True">
<Window.DataContext>
    <VM:EmployeeViewModel />
</Window.DataContext>
<Canvas Background="Gainsboro">
    <ComboBox Name="EmployeesComboBox"
              ItemsSource="{Binding EmployeeEntries}"
              Width="192" FontFamily="Arial" FontSize="14">
        <ComboBox.ItemTemplate>
            <DataTemplate>
                <StackPanel Orientation="Horizontal">
                    <TextBlock Text="{Binding Lastname}" />
                    <TextBlock Text=", " />
                    <TextBlock Text="{Binding Surname}" />
                </StackPanel>
            </DataTemplate>
        </ComboBox.ItemTemplate>
    </ComboBox>
</Canvas>

ViewModel看起来像这样:

using System.Collections.ObjectModel;
using System.ComponentModel;
namespace CustomerGuidance.ViewModels
{
    public class EmployeeViewModel : INotifyPropertyChanged
    {
        public EmployeeViewModel()
        {
        }
        public static ObservableCollection<ServerWindow.EmployeeEntry> EmployeeEntries { get; set; } = new ObservableCollection<ServerWindow.EmployeeEntry>();
        private string _surname;
        private string _lastname;
        private int _id;
        public string Surname
        {
            get { return _surname; }
            set
            {
                if (_surname == value)
                    return;
                _surname = value;
                NotifyPropertyChanged("Surname");
            }
        }
        public string Lastname
        {
            get { return _lastname; }
            set
            {
                if (_lastname == value)
                    return;
                _lastname = value;
                NotifyPropertyChanged("Lastname");
            }
        }
        public int Id
        {
            get { return _id; }
            set
            {
                if (_id == value)
                    return;
                _id = value;
                NotifyPropertyChanged("Id");
            }
        }
        public virtual event PropertyChangedEventHandler PropertyChanged;
        protected virtual void NotifyPropertyChanged(string propertyName)
        {
            PropertyChangedEventHandler handler = PropertyChanged;
            handler?.Invoke(this, new PropertyChangedEventArgs(propertyName));
        }
    }
}

我会收到以下错误消息:" employeeviewModel"名称空间" clr-namespace:customerguidance.viewmodels"。
现在问题:我如何丢失什么?viewModel到我的window-xaml?

您应该构建代码以消失。
这是因为命名空间尚未在组件中可用,设计师在构建之前依赖(您的程序(。

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