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Grid Layout

The Grid is used to display views in rows and columns. The Grid rows and columns supports spacing. The Grid is a powerful control. The control is not ideal for displaying tabular data, for that you should use the ListView or the TableView control.

The Grid uses the RowDefinitions property to define the number of rows in the Grid. It uses the ColumnDefinitions to define the number of columns in the Grid.

Rows and Columns

Row and column information is stored in Grid's RowDefinitions & ColumnDefinitions properties. RowDefinition has a single property, Height, and ColumnDefinition has a single property, Width. The options for height and width are as follows:

  • Auto – automatically sizes to fit content in the row or column. Specified as in XAML.
  • Proportional(*) – sizes columns and rows as a proportion of the remaining space. Specified as a valu and as #* in XAML, with # being your desired value. Specifying one row/column with * will cause it to fill the available space.
  • Absolute – sizes columns and rows with specific, fixed height and width values. Specified as a value and as # in XAML, with # being your desired value.

The Grid uses attached properties. This means, views created inside the Grid will have Grid properties but those properties are not defined on those View.

Spacing

Grid has properties to control spacing between rows and columns. The following properties are available for customizing the Grid:

  • ColumnSpacing – the amount of space between columns.
  • RowSpacing – the amount of space between rows.

The following XAML specifies a Grid with two columns, one row, and 5 px of spacing between columns:

<Grid ColumnSpacing="5">
  <Grid.ColumnDefinitions>
    <ColumnDefinitions Width="*" />
    <ColumnDefinitions Width="*" />
  </Grid.ColumnDefinitions>
</Grid>

Spans

We can use the ColumnSpan and RowSpan to enable views to span over multiple columns or rows.

The following spans the Button over two columns.

<Button Text = "0" Grid.Row="0" Grid.Column="0" Grid.ColumnSpan="2" />
A Simple Grid
<Grid>
  <Grid.RowDefinitions>
    <RowDefinition Height="2*" />
    <RowDefinition Height="*" />
    <RowDefinition Height="200" />
  </Grid.RowDefinitions>
  <Grid.ColumnDefinitions>
    <ColumnDefinition Width="Auto" />
    <ColumnDefinition Width="*" />
  </Grid.ColumnDefinitions>
</Grid>

We can use the Grid to create complex layouts. The XAML below creates a calculator UI using the Grid layout :

<?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="Demo.CalculatorPage"
Title = "Calculator - XAML"
BackgroundColor="#404040">
    <ContentPage.Content>
        <Grid x:Name="controlGrid" RowSpacing="1" ColumnSpacing="1">
            <Grid.RowDefinitions>
                <RowDefinition Height="150" />
                <RowDefinition Height="*" />
                <RowDefinition Height="*" />
                <RowDefinition Height="*" />
                <RowDefinition Height="*" />
                <RowDefinition Height="*" />
            </Grid.RowDefinitions>
            <Grid.ColumnDefinitions>
                <ColumnDefinition Width="*" />
                <ColumnDefinition Width="*" />
                <ColumnDefinition Width="*" />
                <ColumnDefinition Width="*" />
            </Grid.ColumnDefinitions>
            <Label Text="0" Grid.Row="0" HorizontalTextAlignment="End" VerticalTextAlignment="End" TextColor="White"
        FontSize="60" Grid.ColumnSpan="4" />
            <Button Text = "C" Grid.Row="1" Grid.Column="0"
        BackgroundColor="#ddd" TextColor="Black" BorderRadius="0" FontSize="40" />
            <Button Text = "+/-" Grid.Row="1" Grid.Column="1"
        BackgroundColor="#ddd" TextColor="Black" BorderRadius="0" FontSize="40" />
            <Button Text = "%" Grid.Row="1" Grid.Column="2"
        BackgroundColor="#ddd" TextColor="Black" BorderRadius="0" FontSize="40" />
            <Button Text = "div" Grid.Row="1" Grid.Column="3"
        BackgroundColor="#E8AD00" TextColor="White" BorderRadius="0" FontSize="40" />
            <Button Text = "7" Grid.Row="2" Grid.Column="0" BackgroundColor="#eee" BorderRadius="0" TextColor="Black" FontSize="40" />
            <Button Text = "8" Grid.Row="2" Grid.Column="1"
        BackgroundColor="#eee" BorderRadius="0" TextColor="Black" FontSize="40" />
            <Button Text = "9" Grid.Row="2" Grid.Column="2"
        BackgroundColor="#eee" BorderRadius="0" TextColor="Black" FontSize="40" />
            <Button Text = "X" Grid.Row="2" Grid.Column="3"
        BackgroundColor="#E8AD00" TextColor="White" BorderRadius="0" FontSize="40"  />
            <Button Text = "4" Grid.Row="3" Grid.Column="0"
        BackgroundColor="#eee" BorderRadius="0" TextColor="Black" FontSize="40" />
            <Button Text = "5" Grid.Row="3" Grid.Column="1"
        BackgroundColor="#eee" BorderRadius="0" TextColor="Black" FontSize="40" />
            <Button Text = "6" Grid.Row="3" Grid.Column="2"
        BackgroundColor="#eee" BorderRadius="0" TextColor="Black" FontSize="40" />
            <Button Text = "-" Grid.Row="3" Grid.Column="3"
        BackgroundColor="#E8AD00" TextColor="White" BorderRadius="0" FontSize="40"  />
            <Button Text = "1" Grid.Row="4" Grid.Column="0"
        BackgroundColor="#eee" BorderRadius="0" TextColor="Black" FontSize="40"/>
            <Button Text = "2" Grid.Row="4" Grid.Column="1"
        BackgroundColor="#eee" BorderRadius="0" TextColor="Black" FontSize="40" />
            <Button Text = "3" Grid.Row="4" Grid.Column="2"
        BackgroundColor="#eee" BorderRadius="0" TextColor="Black" FontSize="40" />
            <Button Text = "+" Grid.Row="4" Grid.Column="3"
        BackgroundColor="#E8AD00" TextColor="White" BorderRadius="0" FontSize="40"  />
            <Button Text = "0" Grid.ColumnSpan="2"
        Grid.Row="5" Grid.Column="0" BackgroundColor="#eee" BorderRadius="0" TextColor="Black" FontSize="40" />
            <Button Text = "." Grid.Row="5" Grid.Column="2"
        BackgroundColor="#eee" BorderRadius="0" TextColor="Black" FontSize="40" />
            <Button Text = "=" Grid.Row="5" Grid.Column="3"
        BackgroundColor="#E8AD00" TextColor="White" BorderRadius="0" FontSize="40"  />
        </Grid>
    </ContentPage.Content>
</ContentPage>