DataGridComboBoxColumn绑定到ObservableCollection [英] DataGridComboBoxColumn binding to ObservableCollection

问题描述

我将设备类与平台作为属性之一:

I have the class Devices with Platform as one of the properties:

public partial class DevicesCollection : ObservableCollection<Device>
{
    public DevicesCollection() : base()
    { }
}

public partial class Device : INotifyPropertyChanged
{
    private string hostIP;
    private string password;
    private int platform;
    private string status = "";
    private int loop = 1;

    public Device() { }

    public Device(string ip, string pswd, int tp)
    {
        HostIP    = ip;
        Password  = pswd;
        Platform  = tp;
        Status    = "Disconnected";
        Loop = 1;
    }        

以及我的Platform类:

As well as I have Platform class:

public partial class PlatformsCollection : ObservableCollection<Platform>
{
    public PlatformsCollection()
        : base()
    {
        Add(new Platform(1, "iOS"));
        Add(new Platform(2, "Android"));
        Add(new Platform(3, "Windows"));
        Add(new Platform(4, "Blackberry"));
    }
}

public partial class Platform : INotifyPropertyChanged
{
    private string platformName;
    private int platformId;

    public Platform(int id, string name)
    {
        PlatformName = name;
        PlatformId = id;
    }
....

我有一个 DataGrid 绑定到Devices类，并且其中一列是我要绑定到Platform类的 ComboBox Platform:

I have a DataGrid which is bound to Devices class and one of the columns is a ComboBox Platform which I'm trying to bind to Platform class:

<DataGridComboBoxColumn x:Name="platform" Header="Platform" CanUserResize="False"
                        ItemsSource="{Binding Platform}"
                        SelectedValueBinding="{Binding Path=Platform.PlatformId}"
                        SelectedValuePath="PlatformId"
                        DisplayMemberPath="PlatformName" Width="100">
    <DataGridComboBoxColumn.ElementStyle>
        <Style TargetType="ComboBox">
            <Setter Property="ItemsSource" Value="{Binding Path=Platform.PlatformName}" />
        </Style>
    </DataGridComboBoxColumn.ElementStyle>
</DataGridComboBoxColumn>

我看到带有值的保管箱，但是当我尝试接收 DataGrid.ItemsSource 列时选择了任何值之后，平台为空.我做错了什么?我试图将列更改为内部带有组合框的模板-相同的结果.我将不胜感激，至少会有所帮助.

I see the dropbox with the values, but after selecting any value when I trying to receive the DataGrid.ItemsSource column Platform is empty. What I'm doing wrong? I tried to change the column to template with combobox inside - same result. I'll appreciate any help or at least direction to dig in.

推荐答案

如果平台对所有对象都是通用的，则可以将platform属性设为静态，并且xaml将如下所示使用它:

If your platforms are common for all objects, then you can make platforms property static and your xaml will use it as it's shown below:

<DataGridComboBoxColumn
    Header="Role"
    SelectedValueBinding="{Binding Role}"
    ItemsSource="{Binding Source={x:Static local:ProjectsDataContext.Roles}}"
    DisplayMemberPath="Name"/>

希望会有所帮助.

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