c# - 使用 ObservableCollection 和绑定(bind) WPF

Question

我知道这个问题听起来可能与我的上一个问题相似，但这是一种不同的方法，采用了其他人的建议。走不同的路线我试图将 ListView 中的内容绑定(bind)到几个文本框。我对 WPF 非常陌生，不确定我是否做对了。我想这是一种 MVVP 方法。现在这个程序做的不多。 ListView 中只有一项，但它是空的(没有姓名、年龄、年级)。当我尝试在 ListView 中选择它时，我可以看到它突出显示的项目 b/c。任何帮助是极大的赞赏。

有一个类可以生成字符串名称、int age、int grade 并具有 getter 和 setter 方法。类(class)名称叫 Camper(age, grade, name)

类 BindingCamper:制作 observablecollection

     public class Camper
 {
public Camper[] requests;
public int[] relationValues;
public String name;
private String school;
public int age;
public int grade;
private Boolean isGrouped = false;
private string group;


      public Camper(int a, int g, String n)
{
    requests = new Camper[4];
    relationValues = new int[4];
    name = n;
    this.age = a;
    this.grade = g;
}

public Camper(String n)
{
    this.requests = new Camper[4];
    this.relationValues = new int[4];
    this.name = n;
}

public Camper()
{

}

// Getter Methods
public string getName()
{
    return name.ToString();
}
public string getSchool()
{
    return this.school;
}
public int getAge()
{
    return this.age;
}
public int getGrade()
{
    return this.grade;
}
public int getRelationValue(int i)
{
    if (i < relationValues.Length)
    {
        return relationValues[i];
    }
    else
    {
        return 0;
    }

}

---

class BindingCamper
{
    public ObservableCollection<Camper> Campers { get; private set; }

    public BindingCamper()
    {
        Campers = new ObservableCollection<Camper>();

    }

另一个类(页面):

public partial class CampersPage : Page
{
    MainWindow _parentForm;

    public ObservableCollection<Camper> Campers { get; private set; }

    public CampersPage(MainWindow parent)
    {
        _parentForm = parent;
        InitializeComponent();

       // Campers = new ObservableCollection<Camper>();
        var bindMe = new BindingCamper();
        Camper CampMe = new Camper(3, 4, "Tony Lagarrigue");
        // CampMe.getName();
        bindMe.Campers.Add(CampMe);
        DataContext = bindMe;

用于绑定(bind)所有内容的 XAML。 :

      <ListView HorizontalAlignment="Left" Margin="10,10,0,40" x:Name ="listViewCampers" Width="200" SelectionChanged="listViewCampers_SelectionChanged" ItemsSource="{Binding Campers}" DisplayMemberPath="name" IsSynchronizedWithCurrentItem="{x:Null}">

            <ListView.View>
                <GridView>



                    <GridViewColumn Header="Name" DisplayMemberBinding="{Binding Name}" Width="100"  />
                    <GridViewColumn Header="Age" DisplayMemberBinding="{Binding Age}" Width="40" />
                    <GridViewColumn Header="Grade" DisplayMemberBinding="{Binding Grade}" Width="40" />

                </GridView>
            </ListView.View>
        </ListView>
        <Grid Height="Auto" HorizontalAlignment="Stretch" Margin="209,12,0,0" Name="infoGrid" VerticalAlignment="Stretch">
            <Grid.RowDefinitions>
                <RowDefinition Height="134*" />
                <RowDefinition Height="154*" />
            </Grid.RowDefinitions>
            <Label Content="Name" Height="28" HorizontalAlignment="Left" Margin="23,24,0,0" Name="lblName" VerticalAlignment="Top" />
        <TextBox Text="{Binding name, ElementName=listViewCampers}" Height="23" HorizontalAlignment="Left" Margin="23,46,0,0" Name="txtName" VerticalAlignment="Top" Width="120" AcceptsReturn="True" />
            <TextBox Height="23" HorizontalAlignment="Left" Margin="23,103,0,0" Name="txtAge" VerticalAlignment="Top" Width="120" />

Answer 1

您需要在 View 模型中创建要绑定(bind)的公共(public)属性。

永远不要在 .Net 中创建 getSomething() 方法。