我正在尝试将包含多个数据的对象列表加载为网格,并且为它选择了ListBox,如您在此处看到的:
<ListBox ItemsSource="{Binding People, Mode=TwoWay}" SelectedItem="{Binding Person, Mode=TwoWay}" >
<ListBox.ItemContainerStyle>
<Style TargetType="ListBoxItem">
<Setter Property="HorizontalContentAlignment" Value="Stretch" />
</Style>
</ListBox.ItemContainerStyle>
<ListBox.ItemTemplate>
<DataTemplate>
<Grid>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="200"></ColumnDefinition>
<ColumnDefinition Width="50"></ColumnDefinition>
<ColumnDefinition Width="30"></ColumnDefinition>
<ColumnDefinition Width="50"></ColumnDefinition>
<ColumnDefinition Width="20"></ColumnDefinition>
</Grid.ColumnDefinitions>
<TextBlock VerticalAlignment="Center" Text="{Binding name}" Grid.Column="0" TextAlignment="Right"></TextBlock>
<TextBox Grid.Column="1" Margin="5,0,0,0" Height="Auto" VerticalAlignment="Center" HorizontalAlignment="Stretch" Text="{Binding age}"></TextBox>
<TextBlock Grid.Column="2" Text="yo" VerticalAlignment="Center" Margin="5,0,0,0"></TextBlock>
<TextBox Grid.Column="3" Margin="5,0,0,0" Height="Auto" VerticalAlignment="Center" HorizontalAlignment="Stretch" Text="{Binding baremo}"></TextBox>
<TextBlock Grid.Column="4" Text="€" VerticalAlignment="Center" Margin="5,0,0,0"></TextBlock>
</Grid>
</DataTemplate>
</ListBox.ItemTemplate>
当我将数据加载到People ObservableCollection中时,一切正常,并且显示完美.
第一次选择Person时,它可以工作,并且可以在VM中设置属性值.
问题是我第二次选择其他“人员”.该属性不会改变,并且…每次我选择一个不同的属性时,它花费的时间会稍长一些(10ó20之后为MULON LONGER).
这是我的ViewModel代码:
#region People
public const string PeoplePropertyName = "People";
private ObservableCollection<Player> _People;
public ObservableCollection<Player> People
{
get
{
return _People;
}
set
{
_People = value;
RaisePropertyChanged(People);
}
}
#endregion
#region Person
public const string PersonPropertyName = "Person";
private Player _Person;
public Player Person
{
get
{
return _Person;
}
set
{
_Person = value;
RaisePropertyChanged(PersonPropertyName);
}
}
#endregion
我正在像这样加载人员列表:
void LoadPeople(GetPlayersEventArgs e)
{
if (this.People == null) this.People = new ObservableCollection<Player>();
foreach (Player Person in e.Result)
{
Player newPerson = new Player();
...
this.People.Add(newPerson);
}
this.SetUnBusy();
}
我错过了什么吗?提前致谢.
在我每次尝试选择其他值时都看到过@Ryan问题之后,我得到了很多:
A first chance exception of type ‘System.InvalidCastException’
occurred in Solution
解决方法:
我建议打开在抛出CLR异常时将中断的功能.如果您使用的是Visual Studio 2010或2012,请转到调试->异常(或默认情况下为Ctrl-E,D)以及在“公共语言运行时异常”下,确保选中“抛出”.然后重新运行您的解决方案,看看是否有任何问题.
然后,您将在Person对象中看到问题;)
原文地址:https://codeday.me/bug/20191127/2076142.html
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