Xaml 在资源文件中定义listview,可以在同一模型的不同位置使用
我创建了以下ListView来显示数据Xaml 在资源文件中定义listview,可以在同一模型的不同位置使用,xaml,xamarin,xamarin.forms,Xaml,Xamarin,Xamarin.forms,我创建了以下ListView来显示数据 <dataControls:RadListView x:Name="ItemsListView" ItemsSource="{Binding StudyResults,Mode=TwoWay}" MinimumHeightRequest="70"
<dataControls:RadListView x:Name="ItemsListView"
ItemsSource="{Binding StudyResults,Mode=TwoWay}"
MinimumHeightRequest="70"
HeightRequest="{Binding Height}"
SelectedItem="{Binding SelectedItem,Mode=TwoWay}">
<dataControls:RadListView.ItemTemplate>
<DataTemplate>
<listView:ListViewTemplateCell>
<listView:ListViewTemplateCell.View>
<Grid Padding="2,2,2,5" HorizontalOptions="FillAndExpand">
<StackLayout Padding="5,1,1,5" Grid.Column="0">
<Grid >
<Grid.ColumnDefinitions>
<ColumnDefinition Width="*"/>
<ColumnDefinition Width="Auto"/>
</Grid.ColumnDefinitions>
<maxline:XfMaxLinesLabel MaxLines="2" Text="{Binding BriefTitle, Mode=TwoWay}" Style="{StaticResource ListViewLabelStyle}" TextColor="Black"/>
</Grid>
<StackLayout Padding="0,0,0,0" HorizontalOptions="Fill">
<BoxView Margin="0"
BackgroundColor="Gray"
HeightRequest=".25" />
<Label Text="{Binding ClosestFacility.Name, Mode=TwoWay}" Style="{StaticResource ListViewLabelStyle}"/>
<BoxView Margin="0"
BackgroundColor="Gray"
HeightRequest=".25" />
</StackLayout>
</StackLayout>
</Grid>
</listView:ListViewTemplateCell.View>
</listView:ListViewTemplateCell>
</DataTemplate>
</dataControls:RadListView.ItemTemplate>
</dataControls:RadListView>
我想在其他屏幕/视图中重复使用这个完全相同的ListView+标记,只是使用不同的ItemsSource,它将绑定到同一个模型。我需要在不同的屏幕中使用不同的项目源
有没有更好的方法来创建某种类型的资源,以便我可以重用它?您可以将
DataTemplate
设置为资源,这会起作用。您可以将DataTemplate
设置为资源,这会起作用。根据lvan的意见,您可以在ContentPage中设置DataTemplate。resource或ResourceDictionary,一些代码如下:
<ContentPage.Resources>
<DataTemplate x:Key="Radtemplate">
<listView:ListViewTemplateCell>
<listView:ListViewTemplateCell.View>
<Grid Padding="2,2,2,5" HorizontalOptions="FillAndExpand">
<StackLayout Padding="5,1,1,5" Grid.Column="0">
<Grid >
<Grid.ColumnDefinitions>
<ColumnDefinition Width="*"/>
<ColumnDefinition Width="Auto"/>
</Grid.ColumnDefinitions>
<maxline:XfMaxLinesLabel MaxLines="2" Text="{Binding BriefTitle, Mode=TwoWay}" Style="{StaticResource ListViewLabelStyle}" TextColor="Black"/>
</Grid>
<StackLayout Padding="0,0,0,0" HorizontalOptions="Fill">
<BoxView Margin="0"
BackgroundColor="Gray"
HeightRequest=".25" />
<Label Text="{Binding ClosestFacility.Name, Mode=TwoWay}" Style="{StaticResource ListViewLabelStyle}"/>
<BoxView Margin="0"
BackgroundColor="Gray"
HeightRequest=".25" />
</StackLayout>
</StackLayout>
</Grid>
</listView:ListViewTemplateCell.View>
</listView:ListViewTemplateCell>
</DataTemplate>
</ContentPage.Resources>
<StackLayout>
<!-- Place new controls here -->
<dataControls:RadListView x:Name="ItemsListView" ItemTemplate="{StaticResource Radtemplate}"
ItemsSource="{Binding StudyResults,Mode=TwoWay}"
MinimumHeightRequest="70"
HeightRequest="{Binding Height}"
SelectedItem="{Binding SelectedItem,Mode=TwoWay}">
</dataControls:RadListView>
</StackLayout>
关于DateTemplate详细信息,您可以查看以下文章:
更新:
因为RadListView是第三方控件,所以我无法安装它,所以我使用ListView作为示例,它是相同的,您可以看看如何使用TapGestureRecognizer
请先为页面指定一个x:name=listviewpage,然后
<ContentPage
x:Class="demo3.listviewsample.Page2"
xmlns="http://xamarin.com/schemas/2014/forms"
xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
xmlns:d="http://xamarin.com/schemas/2014/forms/design"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
x:Name="listviewpage"
mc:Ignorable="d">
<ContentPage.Resources>
<DataTemplate x:Key="datatemplate1">
<ViewCell>
<StackLayout Margin="5" VerticalOptions="FillAndExpand">
<BoxView BackgroundColor="AliceBlue" HeightRequest="30" />
<Label Text="{Binding username}">
<Label.GestureRecognizers>
<TapGestureRecognizer Command="{Binding BindingContext.command, Source={x:Reference listviewpage}}" CommandParameter="{Binding Email}" />
</Label.GestureRecognizers>
</Label>
</StackLayout>
</ViewCell>
</DataTemplate>
</ContentPage.Resources>
<ContentPage.Content>
<StackLayout>
<ListView
HasUnevenRows="True"
ItemTemplate="{StaticResource datatemplate1}"
ItemsSource="{Binding models}" />
</StackLayout>
</ContentPage.Content>
或者,您可以先给ViewCell一个x:Name viewcell1,然后:
<ContentPage.Resources>
<DataTemplate x:Key="datatemplate1">
<ViewCell x:Name="viewcell">
<StackLayout Margin="5" VerticalOptions="FillAndExpand">
<BoxView BackgroundColor="AliceBlue" HeightRequest="30" />
<Label Text="{Binding username}">
<Label.GestureRecognizers>
<TapGestureRecognizer Command="{Binding Parent.BindingContext.command, Source={x:Reference viewcell}}" CommandParameter="{Binding Email}" />
</Label.GestureRecognizers>
</Label>
</StackLayout>
</ViewCell>
</DataTemplate>
</ContentPage.Resources>
public partial class Page2 : ContentPage
{
public ObservableCollection<model3> models { get; set; }
public RelayCommand1 command { get; set; }
public Page2()
{
InitializeComponent();
models = new ObservableCollection<model3>()
{
new model3(){username="cherry",Email="cherry@outlook.com"},
new model3(){username="barry",Email="barry@outlook.com"}
};
command = new RelayCommand1(obj => method1((string)obj));
this.BindingContext = this;
}
private void method1(string str)
{
Console.WriteLine("the email is {0}",str);
}
}
public class model3
{
public string username { get; set; }
public string Email { get; set; }
}
公共部分类第2页:内容页
{
公共可观测集合模型{get;set;}
公共RelayCommand1命令{get;set;}
公共页2()
{
初始化组件();
模型=新的ObservableCollection()
{
新模型3(){username=“cherry”,电子邮件=”cherry@outlook.com"},
新模型3(){username=“barry”,Email=”barry@outlook.com"}
};
command=newrelaycommand1(obj=>method1((字符串)obj));
this.BindingContext=this;
}
私有void方法1(字符串str)
{
WriteLine(“电子邮件是{0}”,str);
}
}
公共类模型3
{
公共字符串用户名{get;set;}
公共字符串电子邮件{get;set;}
}
以下是继承ICommand的命令:
public class RelayCommand1 : ICommand
{
private readonly Predicate<object> _canExecute;
private readonly Action<object> _execute;
public RelayCommand1(Action<object> execute)
: this(execute, null)
{
}
public RelayCommand1(Action<object> execute, Predicate<object> canExecute)
{
_execute = execute;
_canExecute = canExecute;
}
public bool CanExecute(object parameter)
{
return _canExecute == null ? true : _canExecute(parameter);
}
public event EventHandler CanExecuteChanged;
public void Execute(object parameter)
{
_execute(parameter);
}
}
公共类RelayCommand1:ICommand
{
私有只读谓词_canExecute;
私有只读操作\u执行;
公共中继命令1(操作执行)
:此(执行,空)
{
}
公共RelayCommand1(操作执行,谓词canExecute)
{
_执行=执行;
_canExecute=canExecute;
}
公共布尔CanExecute(对象参数)
{
返回_canExecute==null?true:_canExecute(参数);
}
公共事件处理程序CanExecuteChanged;
public void Execute(对象参数)
{
_执行(参数);
}
}
当我点击label时,它工作正常。根据lvan的意见,您可以在ContentPage.Resource或ResourceDictionary中设置DataTemplate,一些代码如下:
<ContentPage.Resources>
<DataTemplate x:Key="Radtemplate">
<listView:ListViewTemplateCell>
<listView:ListViewTemplateCell.View>
<Grid Padding="2,2,2,5" HorizontalOptions="FillAndExpand">
<StackLayout Padding="5,1,1,5" Grid.Column="0">
<Grid >
<Grid.ColumnDefinitions>
<ColumnDefinition Width="*"/>
<ColumnDefinition Width="Auto"/>
</Grid.ColumnDefinitions>
<maxline:XfMaxLinesLabel MaxLines="2" Text="{Binding BriefTitle, Mode=TwoWay}" Style="{StaticResource ListViewLabelStyle}" TextColor="Black"/>
</Grid>
<StackLayout Padding="0,0,0,0" HorizontalOptions="Fill">
<BoxView Margin="0"
BackgroundColor="Gray"
HeightRequest=".25" />
<Label Text="{Binding ClosestFacility.Name, Mode=TwoWay}" Style="{StaticResource ListViewLabelStyle}"/>
<BoxView Margin="0"
BackgroundColor="Gray"
HeightRequest=".25" />
</StackLayout>
</StackLayout>
</Grid>
</listView:ListViewTemplateCell.View>
</listView:ListViewTemplateCell>
</DataTemplate>
</ContentPage.Resources>
<StackLayout>
<!-- Place new controls here -->
<dataControls:RadListView x:Name="ItemsListView" ItemTemplate="{StaticResource Radtemplate}"
ItemsSource="{Binding StudyResults,Mode=TwoWay}"
MinimumHeightRequest="70"
HeightRequest="{Binding Height}"
SelectedItem="{Binding SelectedItem,Mode=TwoWay}">
</dataControls:RadListView>
</StackLayout>
关于DateTemplate详细信息,您可以查看以下文章:
更新:
因为RadListView是第三方控件,所以我无法安装它,所以我使用ListView作为示例,它是相同的,您可以看看如何使用TapGestureRecognizer
请先为页面指定一个x:name=listviewpage,然后
<ContentPage
x:Class="demo3.listviewsample.Page2"
xmlns="http://xamarin.com/schemas/2014/forms"
xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
xmlns:d="http://xamarin.com/schemas/2014/forms/design"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
x:Name="listviewpage"
mc:Ignorable="d">
<ContentPage.Resources>
<DataTemplate x:Key="datatemplate1">
<ViewCell>
<StackLayout Margin="5" VerticalOptions="FillAndExpand">
<BoxView BackgroundColor="AliceBlue" HeightRequest="30" />
<Label Text="{Binding username}">
<Label.GestureRecognizers>
<TapGestureRecognizer Command="{Binding BindingContext.command, Source={x:Reference listviewpage}}" CommandParameter="{Binding Email}" />
</Label.GestureRecognizers>
</Label>
</StackLayout>
</ViewCell>
</DataTemplate>
</ContentPage.Resources>
<ContentPage.Content>
<StackLayout>
<ListView
HasUnevenRows="True"
ItemTemplate="{StaticResource datatemplate1}"
ItemsSource="{Binding models}" />
</StackLayout>
</ContentPage.Content>
或者,您可以先给ViewCell一个x:Name viewcell1,然后:
<ContentPage.Resources>
<DataTemplate x:Key="datatemplate1">
<ViewCell x:Name="viewcell">
<StackLayout Margin="5" VerticalOptions="FillAndExpand">
<BoxView BackgroundColor="AliceBlue" HeightRequest="30" />
<Label Text="{Binding username}">
<Label.GestureRecognizers>
<TapGestureRecognizer Command="{Binding Parent.BindingContext.command, Source={x:Reference viewcell}}" CommandParameter="{Binding Email}" />
</Label.GestureRecognizers>
</Label>
</StackLayout>
</ViewCell>
</DataTemplate>
</ContentPage.Resources>
public partial class Page2 : ContentPage
{
public ObservableCollection<model3> models { get; set; }
public RelayCommand1 command { get; set; }
public Page2()
{
InitializeComponent();
models = new ObservableCollection<model3>()
{
new model3(){username="cherry",Email="cherry@outlook.com"},
new model3(){username="barry",Email="barry@outlook.com"}
};
command = new RelayCommand1(obj => method1((string)obj));
this.BindingContext = this;
}
private void method1(string str)
{
Console.WriteLine("the email is {0}",str);
}
}
public class model3
{
public string username { get; set; }
public string Email { get; set; }
}
公共部分类第2页:内容页
{
公共可观测集合模型{get;set;}
公共RelayCommand1命令{get;set;}
公共页2()
{
初始化组件();
模型