Xamarin.Forms multi column table GUI

问题

Is ListView the right option to create table, something like this ?

Cell content is text only, but I need to be able to show something like drop down menu on cell touch with few most common options and text field for custom entry. There will be at max 80 to 100 lines data, usually much less.

回答1:

ListView is indeed the best way to approximate a table. Here is an example...

        <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>

This is the code in the view model...

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 });

This results in a table that looks like this...

Not sure why gutters between columns are so wide.

You can define menu items on ViewCell.ContextActions.

来源：https://stackoverflow.com/questions/45870535/xamarin-forms-multi-column-table-gui

标签

listview

xamarin.forms

multiple-columns