Question

ListView是创建表的正确选项，类似这样吗？

单元格内容仅限文本，但我需要能够在单元格触摸上显示类似下拉菜单的内容，其中包含少数最常见的选项和用于自定义输入的文本字段。最多将有80到100行数据，通常要少得多。

Answer 1

ListView确实是近似表的最佳方式。这是一个例子......

        <ListView x:Name="listViewm" ItemsSource="{Binding MyItems}">
            <ListView.Header>
                <Grid BackgroundColor="Black">
                    <Grid.ColumnDefinitions>
                        <ColumnDefinition Width="1*"></ColumnDefinition>
                        <ColumnDefinition Width="1*"></ColumnDefinition>
                        <ColumnDefinition Width="1*"></ColumnDefinition>
                        <ColumnDefinition Width="1*"></ColumnDefinition>
                    </Grid.ColumnDefinitions>
                    <Label Text="Switch" HorizontalOptions="Fill"  Grid.Column="0"   FontSize="Medium" FontAttributes="Bold" BackgroundColor="MediumBlue" TextColor="White" HorizontalTextAlignment="Center" Margin="1"/>
                    <Label Text="Addend 1" HorizontalOptions="Fill"  Grid.Column="1"  FontSize="Medium" FontAttributes="Bold" BackgroundColor="MediumBlue" TextColor="White" HorizontalTextAlignment="Center" Margin="1"/>
                    <Label Text="Addend 2" HorizontalOptions="Fill"  Grid.Column="2"  FontSize="Medium" FontAttributes="Bold" BackgroundColor="MediumBlue" TextColor="White" HorizontalTextAlignment="Center" Margin="1"/>
                    <Label Text="Result" HorizontalOptions="Fill"  Grid.Column="3"  FontSize="Medium" FontAttributes="Bold" BackgroundColor="MediumBlue" TextColor="White" HorizontalTextAlignment="Center" Margin="1"/>
                </Grid>
            </ListView.Header>

            <ListView.ItemTemplate>
                <DataTemplate>
                    <ViewCell>
                        <Grid BackgroundColor="Black">
                            <Grid.ColumnDefinitions>
                                <ColumnDefinition Width="1*"></ColumnDefinition>
                                <ColumnDefinition Width="1*"></ColumnDefinition>
                                <ColumnDefinition Width="1*"></ColumnDefinition>
                                <ColumnDefinition Width="1*"></ColumnDefinition>
                            </Grid.ColumnDefinitions>
                            <Label Grid.Column="0" Text ="{Binding Switch}" HorizontalOptions="Fill" BackgroundColor="LightBlue" HorizontalTextAlignment="Center" Margin="1"></Label>
                            <Label Grid.Column="1" Text ="{Binding Addend1}" HorizontalOptions="Fill" BackgroundColor="LightBlue" HorizontalTextAlignment="Center" Margin="1"></Label>
                            <Label Grid.Column="2" Text ="{Binding Addend2}" HorizontalOptions="Fill" BackgroundColor="LightBlue" HorizontalTextAlignment="Center" Margin="1"></Label>
                            <Label Grid.Column="3" Text ="{Binding Result}" HorizontalOptions="Fill" BackgroundColor="LightBlue" HorizontalTextAlignment="Center" Margin="1"></Label>
                        </Grid>
                    </ViewCell>
                </DataTemplate>
            </ListView.ItemTemplate>
        </ListView>

这是视图模型中的代码......

public class MyItem : INotifyPropertyChanged
{
    bool _switch = false;
    public bool Switch
    {
        get
        {
            return _switch;
        }
        set
        {
            if (_switch != value)
            {
                _switch = value;
                PropertyChanged?.Invoke(this, new PropertyChangedEventArgs("Switch"));
            }
        }

    }
    public int Addend1 { get; set; }
    public int Addend2 { get; set; }
    public int Result
    {
        get
        {
            return Addend1 + Addend2;
        }
    }
    public string Summary
    {
        get
        {
            return Addend1 + " + " + Addend2 + " = " + Result;
        }
    }
    public event PropertyChangedEventHandler PropertyChanged;
}

// ...

public MyItems ObservableCollection<MyItem> { get; set; }

// ...

        MyItems = new ObservableCollection<MyItem>();
        MyItems.Add(new MyItem() { Switch = true, Addend1 = 1, Addend2 = 2 });
        MyItems.Add(new MyItem() { Switch = false, Addend1 = 1, Addend2 = 2 });
        MyItems.Add(new MyItem() { Switch = true, Addend1 = 2, Addend2 = 3 });
        MyItems.Add(new MyItem() { Switch = false, Addend1 = 2, Addend2 = 3 });

这会产生一个看起来像这样的表......

不确定列之间的排水沟是如此之宽。

您可以在ViewCell.ContextActions上定义菜单项。

Xamarin.Forms多列表GUI

1 个答案: