Question

一个简单的数据绑定无法正常工作，虽然我犯了一些错误，却无法弄清楚出了什么问题：

UserControl Xaml：

<UserControl x:Class="PurchaseStockControl"
             xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
             xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" 
             xmlns:d="http://schemas.microsoft.com/expression/blend/2008" 
             mc:Ignorable="d" 
             d:DesignHeight="300" d:DesignWidth="300">
    <Grid>
        <TextBox Text="{Binding Path=Namee}" DataContext="Me"/>
    </Grid>
</UserControl>

我想绑定属性名称：但结果是“System.Windows.Data错误：40：BindingExpression路径错误：在'对象'''字符串'（HashCode = -840583197）'上找不到'Namee'属性。 BindingExpression：Path = Namee; DataItem ='String'（HashCode = -840583197）;目标元素是'TextBox'（Name =''）;目标属性是'Text'（类型'String'）“。虽然我之前做了一些绑定，但我无法弄清错误并花了2天时间:(。控制代码：

Public Class PurchaseStockControl
    Implements ComponentModel.INotifyPropertyChanged

    Public Event PropertyChanged(sender As Object, e As ComponentModel.PropertyChangedEventArgs) Implements ComponentModel.INotifyPropertyChanged.PropertyChanged
    Public Sub NotifyPropertyChanged(ByVal PropertyName As String)
        RaiseEvent PropertyChanged(Me, New ComponentModel.PropertyChangedEventArgs(PropertyName))
    End Sub

    Property Namee As String
        Get
            Return "Some Value"
        End Get
        Set(value As String)
            NotifyPropertyChanged("Namee")
        End Set
    End Property

    Public Sub New()

        ' This call is required by the designer.
        InitializeComponent()

        ' Add any initialization after the InitializeComponent() call.

    End Sub
End Class

带用户控制的主窗口：

<Window x:Class="MainWindow"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:z="clr-namespace:WPFApp" 
    Title="MainWindow" Height="600" Width="800">
    <Grid>
        <z:PurchaseStockControl x:Name="Test"/>
    </Grid>
</Window>

Answer 1

您没有设置视图的DataContext。在您的视图的构造函数中尝试执行

DataContext = this;方法调用后

IntializeComponents()。

简单属性绑定在XAML中不起作用

1 个答案: