Question

我有一个包含三个值的列表框。我需要为ListBox的所有项获取FEstado值并求它们。但是，此ListBox没有已定义的项目，用户从另一个ListBox中选择项目。

我的列表框：

<ListBox Name="List2" HorizontalContentAlignment="Stretch" Grid.ColumnSpan="3" Margin="0,43,-66,0">
    <ListBox.ItemTemplate>
        <DataTemplate>
            <StackPanel Margin="0,0,0,17" Width="432" Height="95" Hold="holdListRmv">
                <TextBlock Grid.Column="0" Text="{Binding FNome}" TextWrapping="Wrap" Style="{StaticResource PhoneTextExtraLargeStyle}"/>
                <TextBlock Grid.Column="1" Text="{Binding FEstado}" TextWrapping="Wrap" Margin="12,-6,12,0" Style="{StaticResource PhoneTextSubtleStyle}"/>
                <TextBlock Grid.Column="2" Text="{Binding Quantity}" TextWrapping="Wrap" Margin="12,-6,12,0" Style="{StaticResource PhoneTextNormalStyle}"/>
            </StackPanel>
        </DataTemplate>
    </ListBox.ItemTemplate>
</ListBox>

Answer 1

假设您通过将模型项添加到ListBox的{{1}}属性（如your previous question所示）来填充ListBox，那么您可以获取所有内容来自同一Items属性的项目。假设ListBox.Items是一个数字，你可以这样做：

FEstado

Answer 2

你可以这样做，试试这个：

XAML：

<Grid x:Name="ContentPanel" Grid.Row="1" Margin="0">
    <StackPanel>
        <ListBox Name="List2" HorizontalContentAlignment="Stretch" Grid.ColumnSpan="3" Margin="0,43,-66,0">
            <ListBox.ItemTemplate>
                <DataTemplate>
                    <StackPanel Margin="0,0,0,17" Width="432" Height="95" >
                        <TextBlock Grid.Column="0" Text="{Binding FNome}" TextWrapping="Wrap" Style="{StaticResource PhoneTextExtraLargeStyle}"/>
                        <TextBlock Grid.Column="1" Text="{Binding FEstado}" TextWrapping="Wrap" Margin="12,-6,12,0" Style="{StaticResource PhoneTextSubtleStyle}"/>
                        <TextBlock Grid.Column="2" Text="{Binding Quantity}" TextWrapping="Wrap" Margin="12,-6,12,0" Style="{StaticResource PhoneTextNormalStyle}"/>
                    </StackPanel>
                </DataTemplate>
            </ListBox.ItemTemplate>
        </ListBox>
        <Button Content="sum" Click="Button_Click_1"></Button>
    </StackPanel>
</Grid>

CS：

protected override void OnNavigatedTo(NavigationEventArgs e)
{
    base.OnNavigatedTo(e);
    ObservableCollection<DataClass> obj = new ObservableCollection<DataClass>();
    obj.Add(new DataClass("AA", "10", "10"));
    obj.Add(new DataClass("BB", "10", "10"));
    List2.ItemsSource = obj;
}

private void Button_Click_1(object sender, RoutedEventArgs e)
{
    int sum = 0;
    for (int i = 0; i < List2.Items.Count; i++)
    {
        DataClass obj = (DataClass)List2.Items[i];
        sum += int.Parse(obj.FEstado.ToString());
    }
    MessageBox.Show(sum.ToString());
}

public class DataClass
{
    public string FNome { get; set; }
    public string FEstado { get; set; }
    public string Quantity { get; set; }
    public DataClass() { }

    public DataClass(string FNome, string FEstado, string Quantity)
    {
        this.FNome = FNome;
        this.FEstado = FEstado;
        this.Quantity = Quantity;
    }
}

如何对列表框项进行求和

2 个答案: