您好，錯誤是第一次初始化我的選項卡，綁定工作，但是當我想更改 tabHeader 的值時，綁定不起作用。當我選擇一個選項卡后，我想顯示該按鈕并隱藏所有未選擇的選項卡的按鈕，主頁.xaml<TabControl TabStripPlacement="Top" ItemsSource="{Binding Tabs, Mode=TwoWay}" x:Name="ParentTab" SelectedItem="{Binding SelectedTab, Mode=TwoWay}"> <TabControl.ItemTemplate> <DataTemplate> <StackPanel Width="Auto" Orientation="Horizontal"> <TextBox Text="{Binding Guid, Mode=TwoWay}" Height="1" Width="1" Visibility="Hidden"></TextBox> <Image Source="{Binding HeaderImg, Mode=TwoWay}" Height="20" Width="20"/> <Label Content="{Binding HeaderSrt, Mode=TwoWay}" Height="Auto" Width="Auto"/> <Button Visibility="{Binding IsEnable, Mode=TwoWay}" Content="X" Height="Auto" Width="Auto" Command="{Binding DataContext.Cmd_CloseTab,ElementName=ParentTab}"/> </StackPanel> </DataTemplate> </TabControl.ItemTemplate> <TabControl.ContentTemplate> <DataTemplate> <ContentControl Content="{Binding Content}" /> </DataTemplate> </TabControl.ContentTemplate></TabControl>在 HomeViewModel.cs 中public sealed class TabItem{ public string HeaderImg { get; set; } public string HeaderSrt { get; set; } public string Guid { get; set; } public Visibility IsEnable { get; set; } public ViewModelBase Content { get; set; }}public class AccueilViewModel : ViewModelBase{ private TabItem m_SelectedTab; private ObservableCollection<TabItem> m_Tabs; public ICommand Cmd_CloseTab { get; set; } public ObservableCollection<TabItem> Tabs{ get{ return m_Tabs; } set{ m_Tabs = value; RaisePropertyChanged("Tabs"); } } public TabItem SelectedTab{ get{ return m_SelectedTab; } set{ m_SelectedTab = value; m_SelectedTab.IsEnable = Visibility.Visible; ActivateBtnClose(); // The binding don't work RaisePropertyChanged("SelectedTab"); RaisePropertyChanged("Tabs"); } }
2 回答
HUX布斯
TA貢獻1876條經驗 獲得超6個贊
更改TabItem為：
public sealed class TabItem : ViewModelBase
{
private string _headerImg;
private string _headerSrt { get; set; }
private string _guid { get; set; }
private Visibility _isEnable { get; set; }
private ViewModelBase _content { get; set; }
public string HeaderImg
{
get { return _headerImg; }
set
{
_headerImg = value;
RaisePropertyChanged("HeaderImg");
}
}
// Set the properties for the other fields as above
}
慕姐4208626
TA貢獻1852條經驗 獲得超7個贊
答案是：
public sealed class TabItem: ViewModelBase
{
public string HeaderImg { get; set; }
public string HeaderSrt { get; set; }
public string Guid { get; set; }
//public bool IsEnable { get; set; }
public ViewModelBase Content { get; set; }
private Visibility _MessageVisibilty;
public Visibility MessageVisibilty
{
get { return _MessageVisibilty; }
set {
_MessageVisibilty = value;
RaisePropertyChanged("MessageVisibilty");}
}
}
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