Xaml Syncfusion Xamarin列表视图不显示任何项目
我想插入一个syncfusion linearlayout listview,但由于某些原因,它没有显示任何项目/数据,而且我没有收到任何错误。同时,我尝试更改绑定语法和一些事情,但似乎无法正确执行 这是我的xaml:Xaml Syncfusion Xamarin列表视图不显示任何项目,xaml,listview,xamarin,data-binding,syncfusion,Xaml,Listview,Xamarin,Data Binding,Syncfusion,我想插入一个syncfusion linearlayout listview,但由于某些原因,它没有显示任何项目/数据,而且我没有收到任何错误。同时,我尝试更改绑定语法和一些事情,但似乎无法正确执行 这是我的xaml: <syncfusion:SfListView x:Name="listView" ItemTemplate="{Binding Source={local2:BandInfoRepository}, Path=Band
<syncfusion:SfListView x:Name="listView"
ItemTemplate="{Binding Source={local2:BandInfoRepository}, Path=BandInfo, Mode=TwoWay}"
ItemSize="100"
AbsoluteLayout.LayoutBounds="1,1,1,1"
AbsoluteLayout.LayoutFlags="All" >
<syncfusion:SfListView.ItemTemplate>
<DataTemplate>
<Grid RowSpacing="0" Padding="0,12,8,0" ColumnSpacing="0" Margin="0">
<Grid.RowDefinitions>
<RowDefinition Height="Auto" />
<RowDefinition Height="1" />
</Grid.RowDefinitions>
<Grid RowSpacing="0" Padding="8,0,8,10">
<Grid.RowDefinitions>
<RowDefinition Height="auto" />
</Grid.RowDefinitions>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="Auto" />
<ColumnDefinition Width="Auto" />
</Grid.ColumnDefinitions>
<Image Source="{Binding Path=BandImage}"
Grid.Column="0"
Grid.Row="0"
HeightRequest="80"
WidthRequest="70"
HorizontalOptions="Start"
VerticalOptions="Start"
/>
<StackLayout Orientation="Vertical"
Padding="5,-5,0,0"
VerticalOptions="Start"
Grid.Row="0"
Grid.Column="1">
<Label Text="{Binding Path=BandName}"
FontAttributes="Bold"
FontSize="16"
BackgroundColor="Green"
TextColor="#000000" />
<Label Text="{Binding Path=BandDescription}"
Opacity="0.54"
BackgroundColor="Olive"
TextColor="#000000"
FontSize="13" />
</StackLayout>
</Grid>
<BoxView Grid.Row="1"
HeightRequest="1"
Opacity="0.75"
BackgroundColor="#CECECE" />
</Grid>
</DataTemplate>
</syncfusion:SfListView.ItemTemplate>
</syncfusion:SfListView>
以防万一,我就是这样填写这个集合的(bandinformepository.cs):
公共类BandInformationLocatory
{
私有可观察收集bandInfo;
公共可观测收集波段信息
{
获取{return bandInfo;}
设置{this.bandInfo=value;}
}
公共信息库()
{
GenerateBookInfo();
}
内部void GenerateBookInfo()
{
字符串[]BandNames=新字符串[]{
“涅盘”,
“Metallica”,
“弗兰克·西纳特拉”
};
字符串[]BandDescriptions=新字符串[]{
“说明”,
“说明”,
“说明”
};
bandInfo=新的ObservableCollection();
对于(int i=0;i
我希望你们能帮我解决这个问题,因为我已经被困了一段时间了。提前感谢。看起来您无意中绑定了两次
ItemTemplate
,而没有绑定任何内容
ItemsSource
甚至有一次。我们查看了您的代码片段,发现您已将基础集合绑定到itemsTemplate属性,而不是ItemsSource属性。要进一步绑定基础集合,必须将ViewModel(即BandInformationPository)设置为ContentPage的BindingContext。请参考以下代码片段,了解如何为页面设置BindingContext,以及如何将基础集合绑定到ItemsSource属性中
代码示例:[XAML]
<ContentPage>
<ContentPage.BindingContext>
<local:BandInfoRepository/>
</ContentPage.BindingContext>
<ContentPage.Content>
<listView:SfListView x:Name="listView" ItemSize="70" ItemsSource="{Binding BandInfo}" >
<listView:SfListView.ItemTemplate>
<DataTemplate>
<ViewCell>
<ViewCell.View>
<Grid x:Name="grid" RowSpacing="1">
<Grid.RowDefinitions>
<RowDefinition Height="*" />
<RowDefinition Height="1" />
</Grid.RowDefinitions>
<Grid RowSpacing="1">
<Grid.ColumnDefinitions>
<ColumnDefinition Width="50" />
<ColumnDefinition Width="*" />
</Grid.ColumnDefinitions>
<Image Source="{Binding BandImage}"
VerticalOptions="Center"
HorizontalOptions="Center"
HeightRequest="50" Aspect="AspectFit"/>
<Grid Grid.Column="1"
RowSpacing="1"
Padding="10,0,0,0"
VerticalOptions="Center">
<Label Text="{Binding ContactName}"/>
</Grid>
</Grid>
<StackLayout Grid.Row="1" BackgroundColor="Gray" HeightRequest="1"/>
</Grid>
</ViewCell.View>
</ViewCell>
</DataTemplate>
</listView:SfListView.ItemTemplate>
</listView:SfListView>
</ContentPage.Content>
</ContentPage>
为了您的帮助,我们附上了下面的工作示例链接
示例链接:为什么ItemTemplate绑定到回购协议?@Jason这是一个类,我只是举了个例子并重命名了类,以便为我的项目提供更多“合适”的名称。我将添加整个.cs以便您可以看到它。看看下面Ivan的回答,他指出了我已经尝试过的同一个问题,我将“ItemTemplate”更改为“ItemSource”现在显示了部分数据,但我仍然无法将BandImage用于workLet me检查,我也是OOP新手,Xamarin也会尝试修复它的外观,就像它现在部分工作一样,但是BandImage绑定仍然不工作,还有一些其他属性,知道吗?
public class BandInfoRepository
{
private ObservableCollection<BandInfo> bandInfo;
public ObservableCollection<BandInfo> BandInfo
{
get { return bandInfo; }
set { this.bandInfo = value; }
}
public BandInfoRepository()
{
GenerateBookInfo();
}
internal void GenerateBookInfo()
{
string[] BandNames = new string[] {
"Nirvana",
"Metallica",
"Frank Sinatra"
};
string[] BandDescriptions = new string[] {
"Description",
"Description",
"Description"
};
bandInfo = new ObservableCollection<BandInfo>();
for (int i = 0; i < BandNames.Count(); i++)
{
var band = new BandInfo()
{
BandName = BandNames[i],
BandDescription = BandDescriptions[i],
BandImage = ImageSource.FromResource("Lim.Images.Image" + i + ".png")
};
bandInfo.Add(band);
}
}
}
<ContentPage>
<ContentPage.BindingContext>
<local:BandInfoRepository/>
</ContentPage.BindingContext>
<ContentPage.Content>
<listView:SfListView x:Name="listView" ItemSize="70" ItemsSource="{Binding BandInfo}" >
<listView:SfListView.ItemTemplate>
<DataTemplate>
<ViewCell>
<ViewCell.View>
<Grid x:Name="grid" RowSpacing="1">
<Grid.RowDefinitions>
<RowDefinition Height="*" />
<RowDefinition Height="1" />
</Grid.RowDefinitions>
<Grid RowSpacing="1">
<Grid.ColumnDefinitions>
<ColumnDefinition Width="50" />
<ColumnDefinition Width="*" />
</Grid.ColumnDefinitions>
<Image Source="{Binding BandImage}"
VerticalOptions="Center"
HorizontalOptions="Center"
HeightRequest="50" Aspect="AspectFit"/>
<Grid Grid.Column="1"
RowSpacing="1"
Padding="10,0,0,0"
VerticalOptions="Center">
<Label Text="{Binding ContactName}"/>
</Grid>
</Grid>
<StackLayout Grid.Row="1" BackgroundColor="Gray" HeightRequest="1"/>
</Grid>
</ViewCell.View>
</ViewCell>
</DataTemplate>
</listView:SfListView.ItemTemplate>
</listView:SfListView>
</ContentPage.Content>
</ContentPage>