Question

<Grid>
    <Grid.ColumnDefinitions>
        <ColumnDefinition Width="1.5*"/>
        <ColumnDefinition/>
    </Grid.ColumnDefinitions>  



    <Grid Grid.Column="0" Background="DarkCyan">
        <Grid.ColumnDefinitions>
            <ColumnDefinition/>
            <ColumnDefinition/>
        </Grid.ColumnDefinitions>
        <Grid.RowDefinitions>
            <RowDefinition/>
            <RowDefinition/>
        </Grid.RowDefinitions>    
            <ComboBox ItemsSource="{Binding Path=charList}" x:Name="comboBox" VerticalAlignment="Top" Width="Auto" Grid.ColumnSpan="2">
            <ComboBoxItem>
                <StackPanel Orientation="Horizontal">
                    <Image Source="Pictures\bagi_warrior.jpg" Width="100" Height="150"/>
                    <Grid>
                        <Grid.RowDefinitions>
                            <RowDefinition/>
                            <RowDefinition Height="6*"/>
                        </Grid.RowDefinitions>
                        <Label Grid.Row="0" Content="{Binding Path=Character.Name}" FontSize="30"/>
                        <Label Grid.Row="1" Content="{Binding Path=Character.Level}" FontSize="20"/>
                    </Grid>
                </StackPanel>
            </ComboBoxItem>
            <ComboBoxItem>
                <StackPanel Orientation="Horizontal">
                    <Image Source="Pictures\azure_knight.jpg" Width="100" Height="130"/>
                    <Grid>
                        <Grid.RowDefinitions>
                            <RowDefinition/>
                            <RowDefinition Height="6*"/>
                        </Grid.RowDefinitions>
                        <Label Grid.Row="0" Content="Azure Knight"  FontSize="30"/>
                        <Label Grid.Row="1" Content="Level 158"  FontSize="20"/>
                    </Grid>
                </StackPanel>
            </ComboBoxItem>
        </ComboBox>
        <Label x:Name="strLabel" Grid.Column="0" VerticalAlignment="Bottom" Height="30" Content="Str: " HorizontalContentAlignment="Center" FontSize="16"/>
        <Label x:Name="intLabel" Grid.Column="1" VerticalAlignment="Bottom" Height="30" Content="Int: " HorizontalContentAlignment="Center" FontSize="16"/>
        <Label x:Name="dexLabel" Grid.Column="0" Grid.Row="1" VerticalAlignment="Center" Height="30" Content="Dex: " HorizontalContentAlignment="Center" FontSize="16"/>
        <Label x:Name="goldLabel" Grid.Column="1" Grid.Row="1" VerticalAlignment="Center" Height="30" Content="Gold: " HorizontalContentAlignment="Center" FontSize="16"/>


    </Grid>
    <Grid Grid.Column="1">
        <Grid.RowDefinitions>
            <RowDefinition/>
        </Grid.RowDefinitions>
        <DataGrid x:Name="MyGrid" ItemsSource="{Binding Path=Item}"></DataGrid>
    </Grid>
</Grid>

我的XAML是这样的，它看起来像这样：

http://puu.sh/aLLrx.png

http://puu.sh/aLLsQ.jpg

我的代码是：

 public partial class MainWindow : Window
 {

    Character aloken;
    Character azureKnight;
    Character bagiWarrior;
    Character incarMagician;
    Character segitaHunter;
    Character segnale;
    Character viciousSummoner;
    private List<Character> _charList = new List<Character>();

    public MainWindow()
    {
        InitializeComponent();
        charList.Add(new Character("Bagi Warrior"));
        this.Item = new ObservableCollection<Item>();
        this.Character = new ObservableCollection<Character>();

        this.DataContext = this;
        //Character.Add(new Character(name: "Bagi Warrior", level: 197, characterClass: CharacterClass.Bagi_Warrior, gender: Gender.Male, strength: 450, intelligence: 4, dexterity: 84, gold: 147203352));
        //Character.Add(new Character(name: "Azure Knight", level: 158, characterClass: CharacterClass.Azure_Knight, gender: Gender.Male, strength: 390, intelligence: 120, dexterity: 92, gold: 204220567));
        //Character.Add(new Character(name: "Incar Magician", level: 169, characterClass: CharacterClass.Incar_Magician, gender: Gender.Female, strength: 4, intelligence: 512, dexterity: 57, gold: 172223520));
        //Character.Add(new Character(name: "Vicious Summoner", level: 203, characterClass: CharacterClass.Vicious_Summoner, gender: Gender.Male, strength: 423, intelligence: 89, dexterity: 45, gold: 114225587));

    }

    public List<Character> charList
    {
        get { return _charList; }
        set { _charList = value; }
    }


    private ObservableCollection<Character> _Character;

    public ObservableCollection<Character> Character
    {
        get { return _Character; }
        set { _Character = value; }
    }


    private ObservableCollection<Item> _Item;
    public ObservableCollection<Item> Item
    {
        get { return _Item; }
        set { _Item = value; }
    }

}

角色类（以防万一）： http://pastebin.com/GFycKqDC

项目类别（以防万一）： http://pastebin.com/RgXzbFHk

它是RPG上的一个项目，您必须使用数据绑定组合框并为组合框创建一个ObservableCollection并查看每个角色。

我遇到的问题是：在我的组合框中，我希望能够用他们的＆＃39;图像显示角色。在它旁边，他们的水平＆＃39;和＆＃39;名称＆＃39;

但我不希望它是静态的，我想创建一个字符列表并将ItemsSource绑定到我的ComboBox，这样无论我选择哪个字符，基于该字符的信息都会更新。我该怎么做？

我被告知创建一个字符列表，然后为ComboBox项目创建一个数据模板，该项目包含绑定到selectedItem的图片，名称和级别将完成工作（我称之为charList）但是我是否做它在代码中或在XAML中抛出一个异常，说明在绑定它之前集合必须为空。

我想将datatemplate中的属性绑定到selectedItem，以便标签和信息能够正确更新。

我做错了什么，为什么抛出这个异常？

修改

好的，现在问题解决了！但是，为什么我的Label绑定仍不适用于Character.Name和Character.Level？

http://puu.sh/aLPr7.jpg

编辑2 public MainWindow（） { 的InitializeComponent（）; Character.Add（新角色（＆＃34; Bagi Warrior＆＃34;））; Character.Add（新角色（＆＃34; Azure Knight＆＃34;））; this.Item = new ObservableCollection（）; this.Character = new ObservableCollection（）;

        this.DataContext = this;
        //Character.Add(new Character(name: "Bagi Warrior", level: 197, characterClass: CharacterClass.Bagi_Warrior, gender: Gender.Male, strength: 450, intelligence: 4, dexterity: 84, gold: 147203352));
        //Character.Add(new Character(name: "Azure Knight", level: 158, characterClass: CharacterClass.Azure_Knight, gender: Gender.Male, strength: 390, intelligence: 120, dexterity: 92, gold: 204220567));
        //Character.Add(new Character(name: "Incar Magician", level: 169, characterClass: CharacterClass.Incar_Magician, gender: Gender.Female, strength: 4, intelligence: 512, dexterity: 57, gold: 172223520));
        //Character.Add(new Character(name: "Vicious Summoner", level: 203, characterClass: CharacterClass.Vicious_Summoner, gender: Gender.Male, strength: 423, intelligence: 89, dexterity: 45, gold: 114225587));

    }

    //public List<Character> charList
    //{
    //    get { return _charList; }
    //    set { _charList = value; }
    //}


    private ObservableCollection<Character> _Character;

    public ObservableCollection<Character> Character
    {
        get { return _Character; }
        set { _Character = value; }
    }

然后是XAML：

<Grid Grid.Column="0" Background="DarkCyan">
        <Grid.ColumnDefinitions>
            <ColumnDefinition/>
            <ColumnDefinition/>
        </Grid.ColumnDefinitions>
        <Grid.RowDefinitions>
            <RowDefinition/>
            <RowDefinition/>
        </Grid.RowDefinitions>
        <ComboBox ItemsSource="{Binding Path=Character}" x:Name="comboBox" VerticalAlignment="Top" Width="Auto" Grid.ColumnSpan="2">
            <ComboBox.ItemTemplate>
                <DataTemplate>
                    <StackPanel Orientation="Horizontal">
                        <Image x:Name="image" Source="{Binding Source={StaticResource ImageConverter}}" Width="100" Height="150"/>
                        <Grid>
                            <Grid.RowDefinitions>
                                <RowDefinition/>
                                <RowDefinition Height="6*"/>
                            </Grid.RowDefinitions>
                            <Label Grid.Row="0" Content="{Binding Path=Character.Name}" FontSize="30"/>
                            <Label Grid.Row="1" Content="{Binding Path=Character.Level}" FontSize="20"/>
                        </Grid>
                    </StackPanel>
                </DataTemplate>
            </ComboBox.ItemTemplate>

Answer 1

您正在定义ItemsSource两次。

一旦使用

ItemsSource="{Binding charList}"

然后再次

<ComboBoxItem>

您需要将ComboBoxItem元素替换为ComboBox.ItemTemplate，并为DataTemplate创建ComboxItem。然后，您需要将Image Source绑定到Character类上的属性，或者使用ItemTemplateSelector让它为项使用适当的DataTemplate。如果只有图像源位置发生变化，您还可以使用绑定到定义字符类的属性的数据触发器。

在使用ItemsSource并帮助使用组合框之前，WPF Items集合必须为空

1 个答案: