更改选中的列表视图项目 Xamarin.Forms 的项目控制 属性
Change item control property of checked listview item Xamarin.Forms
嗨,
如果选中项目复选框并隐藏它,我试图显示评论输入,我有这个 XAML
<ListView ItemsSource="{Binding TaskItems}" x:Name="TasksItems" HasUnevenRows="True" VerticalScrollBarVisibility="Default" SelectionMode="None">
<ListView.ItemTemplate>
<DataTemplate>
<ViewCell>
<StackLayout IsVisible="True" Orientation="Vertical">
<Grid BackgroundColor="White">
<Grid.ColumnDefinitions>
<ColumnDefinition Width="*"></ColumnDefinition>
</Grid.ColumnDefinitions>
<Grid.RowDefinitions>
<RowDefinition Height="auto" />
</Grid.RowDefinitions>
<StackLayout Grid.Column="0" Grid.Row="0">
<input:CheckBox Type="Box" IsChecked="{Binding TaskChecked , Mode=TwoWay}"/>
</StackLayout>
<StackLayout Grid.Column="0" Grid.Row="1" IsVisible="{Binding CommentRequired}">
<Entry BackgroundColor="White" PlaceholderColor="Black" HeightRequest="40" TextColor="Black"/>
</StackLayout>
</Grid>
</StackLayout>
</ViewCell>
</DataTemplate>
</ListView.ItemTemplate>
我有这个 c# 代码可以从数据库中读取项目
public class TaskData
{
public bool TaskChecked { get; set; }
public bool CommentRequired { get; set; }
}
public partial class HomePage : ContentPage
{
public HomePage()
{
ObservableCollection<TaskData> TaskItems { get; set; }
ObservableCollection<TaskData> TasksList;
TaskItems = new ObservableCollection<TaskData>();
//Loop the tasks from database result
While...
TaskItems.Add(new TaskData
{
TaskChecked = false,
CommentRequired = false,
});
//End Loop
TasksListView.ItemsSource = TaskItems;
}
}
现在我需要添加一个“CheckChanged”事件以在用户选中目标列表视图项的复选框时显示评论条目 (IsVisible="True")
谢谢
首先添加事件。
<input:CheckBox Type="Box" IsChecked="{Binding TaskChecked , Mode=TwoWay}" CheckedChanged="OnCheckBoxCheckedChanged"/>
为第二个堆栈添加名称
<StackLayout x:Name="StackLayoutEntry" Grid.Column="0" Grid.Row="1" IsVisible="{Binding CommentRequired}">
<Entry BackgroundColor="White" PlaceholderColor="Black" HeightRequest="40" TextColor="Black"/>
</StackLayout>
然后在后面的代码中使用这个函数来找到点击复选框的入口
void OnCheckBoxCheckedChanged(object sender, CheckedChangedEventArgs e)
{
var Sender = (CheckBox)sender;
var stacklayoutentry = Sender.Parent.FindByName<StackLayout>("StackLayoutEntry");
stacklayoutentry.IsVisible = True;
}
这也可能对您有所帮助 Check
另一种方法,但您需要为所选项目提供标识符。
Check
嗨, 如果选中项目复选框并隐藏它,我试图显示评论输入,我有这个 XAML
<ListView ItemsSource="{Binding TaskItems}" x:Name="TasksItems" HasUnevenRows="True" VerticalScrollBarVisibility="Default" SelectionMode="None">
<ListView.ItemTemplate>
<DataTemplate>
<ViewCell>
<StackLayout IsVisible="True" Orientation="Vertical">
<Grid BackgroundColor="White">
<Grid.ColumnDefinitions>
<ColumnDefinition Width="*"></ColumnDefinition>
</Grid.ColumnDefinitions>
<Grid.RowDefinitions>
<RowDefinition Height="auto" />
</Grid.RowDefinitions>
<StackLayout Grid.Column="0" Grid.Row="0">
<input:CheckBox Type="Box" IsChecked="{Binding TaskChecked , Mode=TwoWay}"/>
</StackLayout>
<StackLayout Grid.Column="0" Grid.Row="1" IsVisible="{Binding CommentRequired}">
<Entry BackgroundColor="White" PlaceholderColor="Black" HeightRequest="40" TextColor="Black"/>
</StackLayout>
</Grid>
</StackLayout>
</ViewCell>
</DataTemplate>
</ListView.ItemTemplate>
我有这个 c# 代码可以从数据库中读取项目
public class TaskData
{
public bool TaskChecked { get; set; }
public bool CommentRequired { get; set; }
}
public partial class HomePage : ContentPage
{
public HomePage()
{
ObservableCollection<TaskData> TaskItems { get; set; }
ObservableCollection<TaskData> TasksList;
TaskItems = new ObservableCollection<TaskData>();
//Loop the tasks from database result
While...
TaskItems.Add(new TaskData
{
TaskChecked = false,
CommentRequired = false,
});
//End Loop
TasksListView.ItemsSource = TaskItems;
}
}
现在我需要添加一个“CheckChanged”事件以在用户选中目标列表视图项的复选框时显示评论条目 (IsVisible="True")
谢谢
首先添加事件。
<input:CheckBox Type="Box" IsChecked="{Binding TaskChecked , Mode=TwoWay}" CheckedChanged="OnCheckBoxCheckedChanged"/>
为第二个堆栈添加名称
<StackLayout x:Name="StackLayoutEntry" Grid.Column="0" Grid.Row="1" IsVisible="{Binding CommentRequired}">
<Entry BackgroundColor="White" PlaceholderColor="Black" HeightRequest="40" TextColor="Black"/>
</StackLayout>
然后在后面的代码中使用这个函数来找到点击复选框的入口
void OnCheckBoxCheckedChanged(object sender, CheckedChangedEventArgs e)
{
var Sender = (CheckBox)sender;
var stacklayoutentry = Sender.Parent.FindByName<StackLayout>("StackLayoutEntry");
stacklayoutentry.IsVisible = True;
}
这也可能对您有所帮助 Check
另一种方法,但您需要为所选项目提供标识符。 Check