C# 如何在Xamarin.Forms中制作方形按钮网格？

我正在尝试创建一个类似于我为Android创建的活动的Xamarin.Forms内容页：

所以基本上我想要一个正方形按钮的网格，我可以通过添加更多的行来轻松地扩展它。我的内容页看起来是这样的（到目前为止只有1行）：

我就快到了，但是按钮会根据它们的文本长度调整大小，这是我想要阻止的——所有按钮的大小都应该相同。怎么做？

既然你已经设置了

<ColumnDefinition Width="*" />

当您有3列时，每列的宽度将设置为屏幕宽度的1/3

<ScrollView>
        <Grid x:Name="MainGrid">
            <Grid.RowDefinitions>
                <RowDefinition Height="auto" />
                <RowDefinition Height="auto" />
            </Grid.RowDefinitions>
            <Grid.ColumnDefinitions>
                <ColumnDefinition Width="0.33*" />
                <ColumnDefinition Width="0.33*" />
                <ColumnDefinition Width="0.33*" />
            </Grid.ColumnDefinitions>
            <Button Text="aaaaaaaaaaaaaaaaaa"
            x:Name="btn1"
            VerticalOptions="CenterAndExpand"
            HorizontalOptions="Center"
            HeightRequest="{Binding Width, Source={x:Reference btn1}}"
            Grid.Row="0"
            Grid.Column="0"/>

            <Button Text="Text2..."
            x:Name="btn2"
            VerticalOptions="CenterAndExpand"
            HorizontalOptions="Center"
            WidthRequest="{Binding Width, Source={x:Reference btn1}}"
            HeightRequest="{Binding Width, Source={x:Reference btn2}}"
            Grid.Row="0"
            Grid.Column="1"/>

            <Button Text="Text3..."
             x:Name="btn3"
            VerticalOptions="CenterAndExpand"
            HorizontalOptions="Center"
            WidthRequest="{Binding Width, Source={x:Reference btn1}}"
            HeightRequest="{Binding Width, Source={x:Reference btn3}}"
            Grid.Row="0"
            Grid.Column="2"/>

            <Button Text="aaaaaaaaaaaaaaaaa"
            x:Name="btn4"
            VerticalOptions="CenterAndExpand"
            HorizontalOptions="Center"
                    WidthRequest="{Binding Width, Source={x:Reference btn1}}"
            HeightRequest="{Binding Width, Source={x:Reference btn4}}"
            Grid.Row="1"
            Grid.Column="0"/>

            <Button Text="Text5..."
            x:Name="btn5"
            VerticalOptions="CenterAndExpand"
            HorizontalOptions="Center"
                    WidthRequest="{Binding Width, Source={x:Reference btn1}}"
            HeightRequest="{Binding Width, Source={x:Reference btn5}}"
            Grid.Row="1"
            Grid.Column="1"/>

            <Button Text="Text6..."
             x:Name="btn6"
            VerticalOptions="CenterAndExpand"
            HorizontalOptions="Center"
                    WidthRequest="{Binding Width, Source={x:Reference btn1}}"
            HeightRequest="{Binding Width, Source={x:Reference btn6}}"
            Grid.Row="1"
            Grid.Column="2"/>

        </Grid>
    </ScrollView>

---

我最终成功了，解决方案是更改按钮的水平选项以填充：

<?xml version="1.0" encoding="utf-8" ?>
<ContentPage xmlns="http://xamarin.com/schemas/2014/forms"
             xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
             x:Class="TravelGuide.MainPage">
    <ContentPage.Content>
        <ScrollView Padding="5">
            <Grid x:Name="MainGrid">
                <Grid.RowDefinitions>
                    <RowDefinition Height="auto" />
                    <RowDefinition Height="auto" />
                </Grid.RowDefinitions>
                <Grid.ColumnDefinitions>
                    <ColumnDefinition Width="*" />
                    <ColumnDefinition Width="*" />
                    <ColumnDefinition Width="*" />
                </Grid.ColumnDefinitions>
                <Button Text="Text..."
                x:Name="btn1"
                VerticalOptions="CenterAndExpand"
                HorizontalOptions="Fill"
                HeightRequest="{Binding Width, Source={x:Reference btn1}}"
                Grid.Row="0"
                Grid.Column="0"/>

                <Button Text="Text2..."
                x:Name="btn2"
                VerticalOptions="CenterAndExpand"
                HorizontalOptions="Fill"
                HeightRequest="{Binding Width, Source={x:Reference btn2}}"
                Grid.Row="0"
                Grid.Column="1"/>

                <Button Text="Text3..."
                 x:Name="btn3"
                VerticalOptions="CenterAndExpand"
                HorizontalOptions="Fill"
                HeightRequest="{Binding Width, Source={x:Reference btn3}}"
                Grid.Row="0"
                Grid.Column="2"/>

                <Button Text="Text3222222..."
                 x:Name="btn4"
                VerticalOptions="CenterAndExpand"
                HorizontalOptions="Fill"
                HeightRequest="{Binding Width, Source={x:Reference btn3}}"
                Grid.Row="1"
                Grid.Column="0"/>
            </Grid>
        </ScrollView>
    </ContentPage.Content>
</ContentPage>

---

另一种方法是按照上面的@Lucas Zhang-MSFT说明进行操作。

现在可以使用了吗？

<?xml version="1.0" encoding="utf-8" ?>
<ContentPage xmlns="http://xamarin.com/schemas/2014/forms"
             xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
             x:Class="TravelGuide.MainPage">
    <ContentPage.Content>
        <ScrollView Padding="5">
            <Grid x:Name="MainGrid">
                <Grid.RowDefinitions>
                    <RowDefinition Height="auto" />
                    <RowDefinition Height="auto" />
                </Grid.RowDefinitions>
                <Grid.ColumnDefinitions>
                    <ColumnDefinition Width="*" />
                    <ColumnDefinition Width="*" />
                    <ColumnDefinition Width="*" />
                </Grid.ColumnDefinitions>
                <Button Text="Text..."
                x:Name="btn1"
                VerticalOptions="CenterAndExpand"
                HorizontalOptions="Fill"
                HeightRequest="{Binding Width, Source={x:Reference btn1}}"
                Grid.Row="0"
                Grid.Column="0"/>

                <Button Text="Text2..."
                x:Name="btn2"
                VerticalOptions="CenterAndExpand"
                HorizontalOptions="Fill"
                HeightRequest="{Binding Width, Source={x:Reference btn2}}"
                Grid.Row="0"
                Grid.Column="1"/>

                <Button Text="Text3..."
                 x:Name="btn3"
                VerticalOptions="CenterAndExpand"
                HorizontalOptions="Fill"
                HeightRequest="{Binding Width, Source={x:Reference btn3}}"
                Grid.Row="0"
                Grid.Column="2"/>

                <Button Text="Text3222222..."
                 x:Name="btn4"
                VerticalOptions="CenterAndExpand"
                HorizontalOptions="Fill"
                HeightRequest="{Binding Width, Source={x:Reference btn3}}"
                Grid.Row="1"
                Grid.Column="0"/>
            </Grid>
        </ScrollView>
    </ContentPage.Content>
</ContentPage>