Simple bind to a class in a WPF app

问题:

How do I take a basic class that I've made and extract it's properties in the list in WPF? I've already tried playing with the itemssource property but nothing seems to have worked for me.

Public Class PageContent
    Public StartDate As DateTime
    Public Header As String
    Public Content As String
End Class

<ListView Name="grid_PageContentList" >
     <ListView.View>
       <GridView>
            <GridViewColumn  DisplayMemberBinding="{Binding StartDate}" Width="50"></GridViewColumn>
            <GridViewColumn DisplayMemberBinding="{Binding Header}" Width="50"></GridViewColumn>
            <GridViewColumn DisplayMemberBinding="{Binding Content}" Width="50"></GridViewColumn>
        </GridView>
    </ListView.View>
</ListView>

回答1:

You cannot bind directly to fields, you need to use properties instead:

Public Class PageContent
    Public Property StartDate As DateTime
    Public Property Header As String
    Public Property Content As String
End Class

Also you need to ensure you have set you DataContext. If you have just a simple form with a code behind approach then put this in the constructor or Loaded handler:

Class MainWindow 

    Public Sub New()

        InitializeComponent()

    End Sub

    Private Sub Form1_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Loaded
        MyData = New List(Of PageContent)
        Dim pc As New PageContent
        pc.Header = "AAAAAAAA"
        pc.StartDate = Now
        MyData.Add(pc)

        pc = New PageContent
        pc.Header = "BBBBBB"
        pc.StartDate = Now.AddMinutes(1)
        MyData.Add(pc)


        DataContext = Me
    End Sub


    Public Property MyData() As List(Of PageContent)

End Class

And set your ItemsSource in your XAML:

    <ListView Name="grid_PageContentList" ItemsSource="{Binding MyData}" >
        <ListView.View>
            <GridView>
                <GridViewColumn  DisplayMemberBinding="{Binding StartDate}" Width="50"></GridViewColumn>
                <GridViewColumn DisplayMemberBinding="{Binding Header}" Width="50"></GridViewColumn>
                <GridViewColumn DisplayMemberBinding="{Binding Content}" Width="50"></GridViewColumn>
            </GridView>
        </ListView.View>
    </ListView>

回答2:

You need to make that an ObservableCollection with INPC or a DependencyProperty. Don't just bind regular properties like that as you might not see the data.