我的第一个 WPF 应用程序(请轻点!),我正在根据足球比赛期间的事件制作应用程序。所以我设置了一个Player类,其中一个属性是 Nationality 例如:Scotland。然后我有一个 DataTemplate,但不是显示字符串“Scotland”,而是显示国旗的图像。我所有的图像都在图像/国家,然后被命名为苏格兰.png 等......
我需要绑定的数据模板中的代码行是:
<Image x:Name="Player_Nationality_Image" Margin="0,0,0,0" Grid.Column="4"Source="Images/Countries/Scotland.png" Height="14" Width="14"/>
有没有一种简单的方法可以稍微更改我的课程并仅基于此 Nationality 属性绑定图像源?我需要在两者之间进行转换吗?
这是我的 Player.vb 类:
Imports System.Collections.ObjectModel
Imports System.ComponentModel
Public Class Player
Implements INotifyPropertyChanged
Private playerFirstNameValue As String
Private playerSurnameValue As String
Private playerShirtNameValue As String
Private playerSquadNumberValue As Integer
Private playerDOBValue As Date
Private playerPlaceOfBirthValue As String
Private playerNationalityValue As String
Private playerCategoryValue As Position
Private specialFeaturesValue As SpecialFeatures
Private teamValue As ObservableCollection(Of Team)
Public Event PropertyChanged As PropertyChangedEventHandler Implements INotifyPropertyChanged.PropertyChanged
Public Property FirstName() As String
Get
Return Me.playerFirstNameValue
End Get
Set(ByVal value As String)
Me.playerFirstNameValue = value
OnPropertyChanged("FirstName")
End Set
End Property
Public Property Surname() As String
Get
Return Me.playerSurnameValue
End Get
Set(ByVal value As String)
Me.playerSurnameValue = value
OnPropertyChanged("Surname")
End Set
End Property
Public Property ShirtName() As String
Get
Return Me.playerShirtNameValue
End Get
Set(ByVal value As String)
Me.playerShirtNameValue = value
OnPropertyChanged("ShirtName")
End Set
End Property
Public Property SquadNumber() As Integer
Get
Return Me.playerSquadNumberValue
End Get
Set(ByVal value As Integer)
Me.playerSquadNumberValue = value
OnPropertyChanged("SquadNumber")
End Set
End Property
Public Property StartDate() As Date
Get
Return Me.playerDOBValue
End Get
Set(ByVal value As Date)
Me.playerDOBValue = value
OnPropertyChanged("DateofBirth")
End Set
End Property
Public Property PlaceOfBirth() As String
Get
Return Me.playerPlaceOfBirthValue
End Get
Set(ByVal value As String)
Me.playerPlaceOfBirthValue = value
OnPropertyChanged("Surname")
End Set
End Property
Public Property Nationality() As String
Get
Return Me.playerNationalityValue
End Get
Set(ByVal value As String)
Me.playerNationalityValue = value
OnPropertyChanged("Nationality")
End Set
End Property
Public Property Position() As Position
Get
Return Me.playerCategoryValue
End Get
Set(ByVal value As Position)
Me.playerCategoryValue = value
OnPropertyChanged("Position")
End Set
End Property
Public Property SpecialFeatures() As SpecialFeatures
Get
Return Me.specialFeaturesValue
End Get
Set(ByVal value As SpecialFeatures)
Me.specialFeaturesValue = value
OnPropertyChanged("SpecialFeatures")
End Set
End Property
Public ReadOnly Property Team() As ReadOnlyObservableCollection(Of Team)
Get
Return New ReadOnlyObservableCollection(Of Team)(Me.teamValue)
End Get
End Property
Public Sub New(ByVal FirstName As String, ByVal Surname As String, ByVal ShirtName As String, ByVal PlaceOfBirth As String, ByVal NationalityImageSourceString As String, ByVal Category As Position, ByVal squadNumber As Integer, ByVal DOB As Date, ByVal specialFeatures As SpecialFeatures)
Me.playerFirstNameValue = FirstName
Me.playerSurnameValue = Surname
Me.playerShirtNameValue = ShirtName
Me.playerPlaceOfBirthValue = PlaceOfBirth
Me.playerNationalityValue = Nationality
Me.playerDOBValue = DOB
Me.playerSquadNumberValue = squadNumber
Me.playerCategoryValue = Category
Me.specialFeaturesValue = specialFeatures
Me.teamValue = New ObservableCollection(Of Team)()
End Sub
Protected Sub OnPropertyChanged(ByVal name As String)
RaiseEvent PropertyChanged(Me, New PropertyChangedEventArgs(name))
End Sub
End Class
Public Enum Position
GK
DF
MF
FW
End Enum
Public Enum SpecialFeatures
None
Yellow
Red
SubbedOff
SubbedOn
Highlight
End Enum
Application.xaml 中的数据模板:
<DataTemplate DataType="{x:Type src:Player}">
<Button Name="Player_Button" Style="{StaticResource Player}" Height="24" Width="320" Margin="0,2,0,0">
<Grid HorizontalAlignment="Center" Width="300">
<Grid.ColumnDefinitions>
<ColumnDefinition Width="20"></ColumnDefinition>
<ColumnDefinition Width="210"></ColumnDefinition>
<ColumnDefinition Width="10"></ColumnDefinition>
<ColumnDefinition Width="30"></ColumnDefinition>
<ColumnDefinition Width="30"></ColumnDefinition>
</Grid.ColumnDefinitions>
<TextBlock Name="Player_Number_Text" Grid.Column="0" FontFamily="Font/#Gotham Narrow Bold" Text="{Binding Path=SquadNumber}" Margin="0,0,0,0" HorizontalAlignment="Left" />
<StackPanel Orientation="Horizontal" Grid.Column="1">
<TextBlock Name="Player_FirstName_Text" FontFamily="Font/#Gotham Narrow Bold" Text="{Binding Path=FirstName}" Margin="5,0,0,0" HorizontalAlignment="Left" />
<TextBlock Name="Player_Surname_Text" FontFamily="Font/#Gotham Narrow Bold" Text="{Binding Path=Surname}" Margin="5,0,0,0" HorizontalAlignment="Left" />
</StackPanel>
<Rectangle Name="Player_Card" Grid.Column="2"></Rectangle>
<TextBlock Name="Player_Position_Text" Grid.Column="3" FontFamily="Font/#Gotham Narrow Bold" Text="{Binding Path=Position}" Margin="5,0,0,0" />
<Image x:Name="Player_Nationality_Image" Margin="0,0,0,0" Grid.Column="4" Source="Images/Countries/Scotland.png" Height="14" Width="14" />
</Grid>
</Button>
<DataTemplate.Triggers>
<DataTrigger Binding="{Binding Path=SpecialFeatures}">
<DataTrigger.Value>
<src:SpecialFeatures>Yellow</src:SpecialFeatures>
</DataTrigger.Value>
<DataTrigger.Setters>
<Setter Property="Fill" Value="Yellow" TargetName="Player_Card" />
</DataTrigger.Setters>
</DataTrigger>
<DataTrigger Binding="{Binding Path=SpecialFeatures}">
<DataTrigger.Value>
<src:SpecialFeatures>Highlight</src:SpecialFeatures>
</DataTrigger.Value>
<Setter Property="Fill" Value="Blue" TargetName="Player_Card" />
</DataTrigger>
</DataTemplate.Triggers>
</DataTemplate>