我＆＃39;我在Xamarin表单应用程序中工作，我目前正在实现一个表单包含两部分，一部分是数据输入部分，另一部分是列表视图Afetr i输入数据并保存它应该出现在列表视图中，在调试中我检查了ListViewUsers。 ItemsSource count不是0，它有值，但listView没有显示在表单中。
<ContentPage.Content>
<StackLayout>
<Grid>
<Grid.RowDefinitions>
<RowDefinition Height="500"/>
<RowDefinition Height="*"/>
</Grid.RowDefinitions>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="*"/>
</Grid.ColumnDefinitions>
<StackLayout Grid.Row="0" Grid.Column="0">
<Grid x:Name="grid">
<Grid.RowDefinitions>
<RowDefinition Height="*"/>
<RowDefinition Height="*"/>
<RowDefinition Height="*"/>
<RowDefinition Height="*"/>
<RowDefinition Height="*"/>
<RowDefinition Height="*"/>
<RowDefinition Height="*"/>
</Grid.RowDefinitions>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="*"/>
<ColumnDefinition Width="*"/>
</Grid.ColumnDefinitions>
<Label x:Name="labelName" Grid.Row="0" Grid.Column="0" Margin="10" FontSize="6" VerticalOptions="CenterAndExpand" HorizontalTextAlignment="Start" Text="Name"/>
<Entry x:Name="textName" Grid.Row="0" Grid.Column="1" WidthRequest="100" FontSize="6" VerticalOptions="CenterAndExpand" HorizontalOptions="Start" HorizontalTextAlignment="Start" Text="{Binding Name}" />
<Label x:Name="labelAge" Grid.Row="1" Grid.Column="0" Margin="10" FontSize="6" Text="Age" VerticalOptions="CenterAndExpand" HorizontalTextAlignment="Start" />
<Entry x:Name="textAge" Grid.Row="1" Grid.Column="1" WidthRequest="100" FontSize="6" VerticalOptions="CenterAndExpand" HorizontalOptions="Start" HorizontalTextAlignment="Start" Text="{Binding Age}" />
<Label x:Name="labelAddress" Grid.Row="2" Grid.Column="0" Margin="10" FontSize="6" Text="Address" VerticalOptions="CenterAndExpand" HorizontalTextAlignment="Start" />
<Entry x:Name="textAddress" Grid.Row="2" Grid.Column="1" WidthRequest="100" FontSize="6" VerticalOptions="CenterAndExpand" HorizontalOptions="Start" HorizontalTextAlignment="Start" Text="{Binding Address}" />
<Label x:Name="labelNICNumber" Grid.Row="3" Grid.Column="0" Margin="10" FontSize="6" Text="NIC" VerticalOptions="CenterAndExpand" HorizontalTextAlignment="Start" />
<Entry x:Name="textNIC" Grid.Row="3" Grid.Column="1" WidthRequest="100" FontSize="6" VerticalOptions="CenterAndExpand" HorizontalOptions="Start" HorizontalTextAlignment="Start" Text="{Binding NIC}" />
<Button Grid.Row="4" Grid.Column="1" HeightRequest = "30" VerticalOptions="CenterAndExpand" HorizontalOptions="Start" FontSize="6" Text="Save" Clicked="UserSaveClick" />
</Grid>
</StackLayout>
<StackLayout Grid.Row="1" Grid.Column="0">
<Label x:Name="labelNICNumber2" Grid.Row="3" Grid.Column="0" Margin="10" FontSize="6" Text="NIC" VerticalOptions="CenterAndExpand" HorizontalTextAlignment="Start" />
<ListView x:Name="ListViewUsers" SeparatorColor="Transparent" HasUnevenRows="True" IsVisible="True" IsEnabled="True">
<ListView.ItemTemplate>
<DataTemplate>
<ViewCell>
<Grid>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="1*" />
<ColumnDefinition Width="2*" />
<ColumnDefinition Width="3*" />
<ColumnDefinition Width="4*" />
</Grid.ColumnDefinitions>
<Label
WidthRequest="20"
HeightRequest="15"
TextColor="Black"
FontFamily="Open Sans"
FontSize="6"
Text="{Binding Name}"
VerticalOptions="Center"
HorizontalOptions="Start"
Grid.Column="1"/>
<Label
WidthRequest="20"
HeightRequest="15"
TextColor="Black"
FontFamily="Open Sans"
FontSize="10"
Text="{Binding Age}"
VerticalOptions="Center"
HorizontalOptions="Start"
Grid.Column="2" />
<Label
WidthRequest="20"
HeightRequest="15"
TextColor="Black"
FontFamily="Open Sans"
FontSize="10"
Text="{Binding Address}"
VerticalOptions="Center"
HorizontalOptions="Start"
Grid.Column="3" />
<Label
WidthRequest="20"
HeightRequest="15"
TextColor="Black"
FontFamily="Open Sans"
FontSize="10"
Text="{Binding NIC}"
VerticalOptions="Center"
HorizontalOptions="Start"
Grid.Column="4"/>
</Grid>
</ViewCell>
</DataTemplate>
</ListView.ItemTemplate>
</ListView>
</StackLayout>
</Grid>
</StackLayout>
答案 0 :(得分：1)
很难看到这里发生了什么，但是
*，只是为了确保注意：如果这不起作用，请删除除ListView之外的所有内容，就像进行完整性检查一样
<强>的Xaml
<Grid>
<Grid.RowDefinitions>
<RowDefinition Height="*" />
<RowDefinition Height="*" />
</Grid.RowDefinitions>
<Grid x:Name="grid" Grid.Row="0">
<Grid.RowDefinitions>
<RowDefinition Height="*" />
<RowDefinition Height="*" />
<RowDefinition Height="*" />
<RowDefinition Height="*" />
<RowDefinition Height="*" />
<RowDefinition Height="*" />
<RowDefinition Height="*" />
</Grid.RowDefinitions>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="*" />
<ColumnDefinition Width="*" />
</Grid.ColumnDefinitions>
<Label
x:Name="labelName"
Grid.Row="0"
Grid.Column="0"
Margin="10"
FontSize="6"
HorizontalTextAlignment="Start"
Text="Name"
VerticalOptions="CenterAndExpand" />
<Entry
x:Name="textName"
Grid.Row="0"
Grid.Column="1"
FontSize="6"
HorizontalOptions="Start"
HorizontalTextAlignment="Start"
Text="{Binding Name}"
VerticalOptions="CenterAndExpand"
WidthRequest="100" />
<Label
x:Name="labelAge"
Grid.Row="1"
Grid.Column="0"
Margin="10"
FontSize="6"
HorizontalTextAlignment="Start"
Text="Age"
VerticalOptions="CenterAndExpand" />
<Entry
x:Name="textAge"
Grid.Row="1"
Grid.Column="1"
FontSize="6"
HorizontalOptions="Start"
HorizontalTextAlignment="Start"
Text="{Binding Age}"
VerticalOptions="CenterAndExpand"
WidthRequest="100" />
<Label
x:Name="labelAddress"
Grid.Row="2"
Grid.Column="0"
Margin="10"
FontSize="6"
HorizontalTextAlignment="Start"
Text="Address"
VerticalOptions="CenterAndExpand" />
<Entry
x:Name="textAddress"
Grid.Row="2"
Grid.Column="1"
FontSize="6"
HorizontalOptions="Start"
HorizontalTextAlignment="Start"
Text="{Binding Address}"
VerticalOptions="CenterAndExpand"
WidthRequest="100" />
<Label
x:Name="labelNICNumber"
Grid.Row="3"
Grid.Column="0"
Margin="10"
FontSize="6"
HorizontalTextAlignment="Start"
Text="NIC"
VerticalOptions="CenterAndExpand" />
<Entry
x:Name="textNIC"
Grid.Row="3"
Grid.Column="1"
FontSize="6"
HorizontalOptions="Start"
HorizontalTextAlignment="Start"
Text="{Binding NIC}"
VerticalOptions="CenterAndExpand"
WidthRequest="100" />
<Button
Grid.Row="4"
Grid.Column="1"
Clicked="UserSaveClick"
FontSize="6"
HeightRequest="30"
HorizontalOptions="Start"
Text="Save"
VerticalOptions="CenterAndExpand" />
</Grid>
<StackLayout Grid.Row="1">
<Label
x:Name="labelNICNumber2"
Grid.Row="3"
Grid.Column="0"
Margin="10"
FontSize="6"
HorizontalTextAlignment="Start"
Text="NIC"
VerticalOptions="CenterAndExpand" />
<ListView
x:Name="ListViewUsers"
HasUnevenRows="True"
IsEnabled="True"
IsVisible="True"
SeparatorColor="Transparent">
<ListView.ItemTemplate>
<DataTemplate>
<ViewCell>
<Grid>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="1*" />
<ColumnDefinition Width="2*" />
<ColumnDefinition Width="3*" />
<ColumnDefinition Width="4*" />
</Grid.ColumnDefinitions>
<Label
Grid.Column="1"
FontFamily="Open Sans"
FontSize="6"
HeightRequest="15"
HorizontalOptions="Start"
Text="{Binding Name}"
TextColor="Black"
VerticalOptions="Center"
WidthRequest="20" />
<Label
Grid.Column="2"
FontFamily="Open Sans"
FontSize="10"
HeightRequest="15"
HorizontalOptions="Start"
Text="{Binding Age}"
TextColor="Black"
VerticalOptions="Center"
WidthRequest="20" />
<Label
Grid.Column="3"
FontFamily="Open Sans"
FontSize="10"
HeightRequest="15"
HorizontalOptions="Start"
Text="{Binding Address}"
TextColor="Black"
VerticalOptions="Center"
WidthRequest="20" />
<Label
Grid.Column="4"
FontFamily="Open Sans"
FontSize="10"
HeightRequest="15"
HorizontalOptions="Start"
Text="{Binding NIC}"
TextColor="Black"
VerticalOptions="Center"
WidthRequest="20" />
</Grid>
</ViewCell>
</DataTemplate>
</ListView.ItemTemplate>
</ListView>
</StackLayout>
</Grid>