[英]C# UWP: Access a textblock and status of check box inside a listview
嗨,我的列表視圖如下:![] [1]
<RelativePanel >
<ListView x:Name="StudentListView"
IsItemClickEnabled="True"
Width="1000"
ItemClick="Student_ItemClick" >
<ListView.ItemTemplate>
<DataTemplate x:Name="ABC">
<StackPanel
x:Name="ListItemPanel"
Orientation="Horizontal"
MaxWidth="500">
<TextBlock x:Name ="uName" Text="{Binding Username}"
Margin="20,0,20,8"
FontSize="24"
FontStyle="Italic"
FontWeight="SemiBold"
Foreground="DarkBlue"
/>
<CheckBox Name="AttendCheckBox"
HorizontalAlignment="Left"
Checked="AttendCheckBox_Checked"
IsChecked="False"></CheckBox>
</StackPanel>
</DataTemplate>
</ListView.ItemTemplate>
</ListView>
<TextBlock Name="queryName" FontSize="20"></TextBlock>
<Button Name="finishBtn" Content="Finish" RelativePanel.Below="StudentListView" ></Button>
</RelativePanel>
我試圖訪問每個數據項,並檢查當用戶單擊與listview
在同一頁面上的完成按鈕時,是否選中了復選框。 而且我很難解決這個問題。 關於它的任何提示都會很棒。 謝謝
我檢查了您的代碼。 您不需要使用CheckBox的Checked
事件。 相反,您可以在自定義類中聲明bool type屬性,並將IsChecked
綁定到它,並設置Mode=TwoWay
,然后,一旦復選框的IsChecked
值更改,源代碼也將被更新。 之后,您可以過濾源以獲取“ IsChecked = True”項。
根據您的代碼片段,我制作了一個代碼示例供您參考:
<RelativePanel>
<ListView x:Name="StudentListView"
IsItemClickEnabled="True"
Width="1000" Height="500">
<ListView.ItemTemplate>
<DataTemplate x:Name="ABC">
<StackPanel
x:Name="ListItemPanel"
Orientation="Horizontal"
MaxWidth="500">
<TextBlock x:Name ="uName" Text="{Binding Username}"
Margin="20,0,20,8"
FontSize="24"
FontStyle="Italic"
FontWeight="SemiBold"
Foreground="DarkBlue"/>
<CheckBox Name="AttendCheckBox" HorizontalAlignment="Left" IsChecked="{Binding IsSelected,Mode=TwoWay}"></CheckBox>
</StackPanel>
</DataTemplate>
</ListView.ItemTemplate>
</ListView>
<TextBlock Name="queryName" FontSize="20"></TextBlock>
<Button Name="finishBtn" Content="Finish" RelativePanel.Below="StudentListView" Click="{x:Bind finishBtn_Click}"></Button>
</RelativePanel>
public sealed partial class MainPage : Page
{
public ObservableCollection<Test> tests { get; set; }
public MainPage()
{
this.InitializeComponent();
tests = new ObservableCollection<Test>();
for (int i=0;i<100;i++)
{
tests.Add(new Test() {Username="name "+i });
}
StudentListView.ItemsSource = tests;
}
private void finishBtn_Click(object sender, RoutedEventArgs e)
{
var selectedStudents = tests.Where(x => x.IsSelected == true).ToList();
}
}
public class Test : INotifyPropertyChanged
{
private string _Username;
public string Username
{
get { return _Username; }
set
{
if (_Username != value)
{
_Username = value;
RaisePropertyChanged("Username");
}
}
}
private bool _IsSelected;
public bool IsSelected
{
get { return _IsSelected; }
set
{
if (_IsSelected != value)
{
_IsSelected = value;
RaisePropertyChanged("IsSelected");
}
}
}
public event PropertyChangedEventHandler PropertyChanged;
private void RaisePropertyChanged(string PropertyName)
{
if (PropertyChanged != null)
{
PropertyChanged(this,new PropertyChangedEventArgs(PropertyName));
}
}
}
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