我有这样的资源
<ContentPage.Resources>
<ResourceDictionary>
<x:String x:Key="LabelAutomationIdentifier">LBL_</x:String>
</ResourceDictionary>
</ContentPage.Resources>
我的listview看起来像
<ListView
ItemsSource="{Binding ListItemSource}">
<ListView.ItemTemplate>
<DataTemplate>
<ViewCell>
<Label
AutomationId="{StaticResource LabelAutomationIdentifier, StringFormat {0}_{Incremental Value OR UniqueIdentifier}'}"
Text="{Binding Title}" />
</ViewCell>
</DataTemplate>
</ListView.ItemTemplate>
如何在自动化ID中添加增量值？
答案 0 :(得分：1)
创建对象时无法创建???例如：var _id = 0;
MenuItems = new ObservableCollection<MenuItem>
{
new MenuItem
{
Id = _id++;
Title = "xxxxxxxx",
},
new MenuItem
{
Id = _id++;
Title = "yyyyyyyyy",
},
new MenuItem
{
Id = _id++;
Title = "zzzzz",
},
new MenuItem
{
Id = _id++;
Title = "jjjj",
},
};
答案 1 :(得分：0)
我知道这确实很老，但是最近我有同样的需求，找不到很好的例子，因此我将其组合在一起。如果有更好的方法，我很乐意看到它：
首先，创建几个转换器：
public class RowNumberConverter : IValueConverter
{
public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
{
if (value == null || parameter == null)
{
return null;
}
int counter = 1;
if (parameter is Binding && ((Binding)parameter).Source is ListView)
{
ListView localListView = (ListView)((Binding)parameter).Source;
string listViewName = localListView.StyleId;
foreach (var item in localListView.ItemsSource)
{
if (item.GetType() != value.GetType())
{
return null;
}
if (item == value)
{
return $"{listViewName}Row{counter}";
}
else
{
counter++;
}
}
}
return null;
}
public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
{
throw new NotImplementedException();
}
}
public class CellNameConverter : IValueConverter
{
public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
{
return $"{value}.{parameter}";
}
public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
{
throw new NotImplementedException();
}
}
在您的XAML中：
在顶部使用其他名称空间引用引用您的转换器
xmlns:converter="clr-namespace:THE NAMESPACE FOR YOUR CONVERTERS"
这是一个示例列表视图：
<ListView x:Name="listViewResults"
AutomationId="listViewResults"
Margin="0"
IsPullToRefreshEnabled="True"
RefreshCommand="{Binding OnRefresh}"
SelectionMode="None"
IsRefreshing="{Binding IsRefreshing}"
ItemsSource="{Binding Items}">
<ListView.Resources>
<converter:NullableIntConverter x:Key="NullableIntConverter"/>
<converter:RowNumberConverter x:Key="RowNumberConverter"/>
<converter:CellNameConverter x:Key="CellNameConverter"/>
</ListView.Resources>
<ListView.ItemTemplate>
<DataTemplate>
<ViewCell>
<StackLayout Margin="0,0,0,0" Orientation="Horizontal" HorizontalOptions="FillAndExpand">
<Grid Margin="5"
x:Name="listViewResultsRow"
AutomationId="listViewResultsRow">
<Grid.ColumnDefinitions>
<ColumnDefinition Width="100" />
<ColumnDefinition Width="260" />
<ColumnDefinition Width="120" />
<ColumnDefinition Width="120" />
<ColumnDefinition Width="120" />
</Grid.ColumnDefinitions>
<Grid.RowDefinitions>
<RowDefinition Height="*" />
</Grid.RowDefinitions>
<Label x:Name="listViewResultsRowNumber" Grid.Column="0" Text="{Binding Source={x:Reference listViewResultsRow}, Path=BindingContext, Converter={StaticResource RowNumberConverter}, ConverterParameter={Binding Source={x:Reference listViewResults}, Path=BindingContext}}" IsVisible="False"/>
<Label Grid.Row="0"
Grid.Column="0"
AutomationId="{Binding Source={x:Reference listViewResultsRowNumber}, Path=Text, Converter={StaticResource CellNameConverter}, ConverterParameter='Column1'}"
Text="{Binding SampleId}"
VerticalTextAlignment="Center"
HorizontalOptions="Center"
FontSize="Micro" />
<Label Grid.Row="0"
Grid.Column="1"
AutomationId="{Binding Source={x:Reference listViewResultsRowNumber}, Path=Text, Converter={StaticResource CellNameConverter}, ConverterParameter='Column2'}"
Text="{Binding CancelReason}"
VerticalTextAlignment="Center"
HorizontalOptions="Center"
FontSize="Micro" />
<Label Grid.Row="0"
Grid.Column="2"
AutomationId="{Binding Source={x:Reference listViewResultsRowNumber}, Path=Text, Converter={StaticResource CellNameConverter}, ConverterParameter='Column3'}"
Text="{Binding DateCreated, StringFormat='{}{0:MM/dd/yyyy hh\\:mm:ss tt}'}"
VerticalTextAlignment="Center"
HorizontalOptions="Center"
FontSize="Micro" />
<Label Grid.Row="0"
Grid.Column="3"
AutomationId="{Binding Source={x:Reference listViewResultsRowNumber}, Path=Text, Converter={StaticResource CellNameConverter}, ConverterParameter='Column4'}"
Text="{Binding LastSyncAttempt, StringFormat='{}{0:MM/dd/yyyy hh\\:mm:ss tt}' }"
VerticalTextAlignment="Center"
HorizontalOptions="Center"
FontSize="Micro" />
<Label Grid.Row="0"
Grid.Column="4"
AutomationId="{Binding Source={x:Reference listViewResultsRowNumber}, Path=Text, Converter={StaticResource CellNameConverter}, ConverterParameter='Column5'}"
Text="{Binding DateSynced, StringFormat='{}{0:MM/dd/yyyy hh\\:mm:ss tt}' }"
VerticalTextAlignment="Center"
HorizontalOptions="Center"
FontSize="Micro" />
</Grid>
</StackLayout>
</ViewCell>
</DataTemplate>
</ListView.ItemTemplate>
</ListView>
这将为您设置ListView的每一行中的每个单元格提供一个唯一的AutomationId，像这样的网格：