C# Xamarin绑定不适用于listview

我尝试使用ListView将一些测试数据与我的xamarin表单页面绑定，以使其可滚动。但是，由于某些原因，我无法将数据与ListView正确绑定。 我有以下ContentPage类：

public class transactionTest
{
    public string Type { get; set; }
    public decimal Amount { get; set; }
    public string User { get; set; }
    public DateTime Date { get; set; }
}

[DesignTimeVisible(false)]
public partial class MainPageUser : ContentPage
{
    public ObservableCollection<transactionTest> ObjectList { get; set; }

    public MainPageUser()
    {
        InitializeComponent();
        BindingContext = this;

        ObjectList = new ObservableCollection<transactionTest>()
        {
            new transactionTest()
            {
                Amount = 231,
                Date = DateTime.Parse("2020-06-12 15:22"),
                Type = "Send",
                User = "Test"
            },
            new transactionTest()
            {
                Amount = 112,
                Date = DateTime.Parse("2020-06-13 12:22"),
                Type = "Send",
                User = "Test"
            },
            new transactionTest()
            {
                Amount = 131,
                Date = DateTime.Parse("2020-06-11 13:22"),
                Type = "Receive",
                User = "Test"
            },
            new transactionTest()
            {
                Amount = 225,
                Date = DateTime.Parse("2020-06-14 10:22"),
                Type = "Send",
                User = "Test"
            },
            new transactionTest()
            {
                Amount = 201,
                Date = DateTime.Parse("2020-06-15 16:22"),
                Type = "Receive",
                User = "Test"
            }
        };
    }
}

公共类事务测试
{
公共字符串类型{get；set；}
公共十进制数{get；set；}
公共字符串用户{get；set；}
公共日期时间日期{get；set；}
}
[设计时间可见（错误）]
公共部分类MainPageUser:ContentPage
{
公共ObservableCollection对象列表{get；set；}
公共主页用户（）
{
初始化组件（）；
BindingContext=这个；
ObjectList=新的ObservableCollection（）
{
新transactionTest（）
{
金额=231，
Date=DateTime.Parse（“2020-06-12 15:22”），
Type=“发送”，
User=“测试”
},
新transactionTest（）
{
金额=112，
Date=DateTime.Parse（“2020-06-13 12:22”），
Type=“发送”，
User=“测试”
},
新transactionTest（）
{
金额=131，
Date=DateTime.Parse（“2020-06-11 13:22”），
Type=“接收”，
User=“测试”
},
新transactionTest（）
{
金额=225，
Date=DateTime.Parse（“2020-06-1410:22”），
Type=“发送”，
User=“测试”
},
新transactionTest（）
{
金额=201，
Date=DateTime.Parse（“2020-06-15 16:22”），
Type=“接收”，
User=“测试”
}
};
}
}

我在listview中有以下XAML代码：

<ContentPage xmlns="http://xamarin.com/schemas/2014/forms"
         xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
         xmlns:d="http://xamarin.com/schemas/2014/forms/design"
         xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
         mc:Ignorable="d"
         x:Class="MyNameSpace.ViewPages.MainPageUser">
<StackLayout>
    <Grid VerticalOptions="CenterAndExpand">
        <Grid.RowDefinitions>
            <RowDefinition Height="2*"/>
            <RowDefinition Height="2*"/>
            <RowDefinition Height="2*"/>
            <RowDefinition Height="2*"/>
            <RowDefinition Height="2*"/>
            <RowDefinition Height="*"/>
            <RowDefinition Height="2*"/>
        </Grid.RowDefinitions>
        <Grid.ColumnDefinitions>
            <ColumnDefinition/>
            <ColumnDefinition/>
        </Grid.ColumnDefinitions>
        <ListView Grid.Row="1" Grid.Column="0" Grid.ColumnSpan="2" x:Name="listTransactions" VerticalScrollBarVisibility="Default" ItemsSource="{Binding ObjectList}">
            <ListView.Header>
                <Grid>
                    <Grid.RowDefinitions>
                        <RowDefinition></RowDefinition>
                    </Grid.RowDefinitions>
                    <Grid.ColumnDefinitions>
                        <ColumnDefinition/>
                        <ColumnDefinition/>
                        <ColumnDefinition/>
                        <ColumnDefinition/>
                    </Grid.ColumnDefinitions>
                    <Label Grid.Row="0" Grid.Column="0" HorizontalTextAlignment="Center">Type</Label>
                    <Label Grid.Row="0" Grid.Column="1" HorizontalTextAlignment="Center">Amount</Label>
                    <Label Grid.Row="0" Grid.Column="2" HorizontalTextAlignment="Center">User</Label>
                    <Label Grid.Row="0" Grid.Column="3" HorizontalTextAlignment="Center">Date</Label>
                </Grid>
            </ListView.Header>
            <ListView.ItemTemplate>
                <DataTemplate>
                    <Grid>
                        <Grid.RowDefinitions>
                            <RowDefinition></RowDefinition>
                        </Grid.RowDefinitions>
                        <Grid.ColumnDefinitions>
                            <ColumnDefinition/>
                            <ColumnDefinition/>
                            <ColumnDefinition/>
                            <ColumnDefinition/>
                        </Grid.ColumnDefinitions>
                        <Label Grid.Row="0" Grid.Column="0" HorizontalTextAlignment="Center" Text="{Binding Type}"/>
                        <Label Grid.Row="0" Grid.Column="1" HorizontalTextAlignment="Center" Text="{Binding Amount}"/>
                        <Label Grid.Row="0" Grid.Column="2" HorizontalTextAlignment="Center" Text="{Binding User}"/>
                        <Label Grid.Row="0" Grid.Column="3" HorizontalTextAlignment="Center" Text="{Binding Date}"/>
                    </Grid>
                </DataTemplate>
            </ListView.ItemTemplate>
        </ListView>
    </Grid>
</StackLayout>

类型
数量
使用者
日期

我无法使用XAML代码正确绑定数据。谁能帮我一下我做错了什么

---

谢谢

根据我的测试，您需要将网格放在DataTemplate的

ViewCell

中。正如Jason所说，在初始化数据后，将

BindingContext

放入

Xaml：

类型
数量
使用者
日期

代码隐藏：

 public partial class Page18 : ContentPage
{
    public ObservableCollection<transactionTest> ObjectList { get; set; }
    public Page18()
    {
        InitializeComponent();
       
        ObjectList = new ObservableCollection<transactionTest>()
        {
            new transactionTest (){ Amount = 231, Date = DateTime.Parse("2020-06-12 15:22"), Type = "Send", User = "Test"},
            new transactionTest() { Amount = 112, Date = DateTime.Parse("2020-06-13 12:22"), Type = "Send",  User = "Test" },
            new transactionTest() { Amount = 131, Date = DateTime.Parse("2020-06-11 13:22"), Type = "Receive", User = "Test"},
            new transactionTest() { Amount = 225, Date = DateTime.Parse("2020-06-14 10:22"), Type = "Send", User = "Test"},
            new transactionTest() { Amount = 201, Date = DateTime.Parse("2020-06-15 16:22"), Type = "Receive",User = "Test"}
        };
        this.BindingContext = this;


    }
}
public class transactionTest
{
    public string Type { get; set; }
    public int Amount { get; set; }
    public string User { get; set; }
    public DateTime Date { get; set; }
}

公共部分类第18页：内容页
{
公共ObservableCollection对象列表{get；set；}
公共页18（）
{
初始化组件（）；
ObjectList=新的ObservableCollection（）
{
newtransactiontest（）{Amount=231，Date=DateTime.Parse（“2020-06-12 15:22”），Type=“Send”，User=“Test”}，
new transactionTest（）{Amount=112，Date=DateTime.Parse（“2020-06-13 12:22”），Type=“Send”，User=“Test”}，
new transactionTest（）{Amount=131，Date=DateTime.Parse（“2020-06-11 13:22”），Type=“Receive”，User=“Test”}，
new transactionTest（）{Amount=225，Date=DateTime.Parse（“2020-06-14 10:22”），Type=“Send”，User=“Test”}，
newtransactiontest（）{Amount=201，Date=DateTime.Parse（“2020-06-15 16:22”），Type=“Receive”，User=“Test”}
};
this.BindingContext=this；
}
}
公共类事务测试
{
公共字符串类型{get；set；}
公共整数金额{get；set；}
公共字符串用户{get；set；}
公共日期时间日期{get；set；}
}

截图：

---

您需要实现

InotifyPropertyChange
 public partial class Page18 : ContentPage
{
    public ObservableCollection<transactionTest> ObjectList { get; set; }
    public Page18()
    {
        InitializeComponent();
       
        ObjectList = new ObservableCollection<transactionTest>()
        {
            new transactionTest (){ Amount = 231, Date = DateTime.Parse("2020-06-12 15:22"), Type = "Send", User = "Test"},
            new transactionTest() { Amount = 112, Date = DateTime.Parse("2020-06-13 12:22"), Type = "Send",  User = "Test" },
            new transactionTest() { Amount = 131, Date = DateTime.Parse("2020-06-11 13:22"), Type = "Receive", User = "Test"},
            new transactionTest() { Amount = 225, Date = DateTime.Parse("2020-06-14 10:22"), Type = "Send", User = "Test"},
            new transactionTest() { Amount = 201, Date = DateTime.Parse("2020-06-15 16:22"), Type = "Receive",User = "Test"}
        };
        this.BindingContext = this;


    }
}
public class transactionTest
{
    public string Type { get; set; }
    public int Amount { get; set; }
    public string User { get; set; }
    public DateTime Date { get; set; }
}