📅  最后修改于: 2023-12-03 14:48:37.059000             🧑  作者: Mango
在Xamarin中,当我们需要以编程方式设置表单元素的网格行属性时,我们可以使用Grid.RowProperty附加属性。在这里,我们将介绍如何使用C#代码将表单元素的行属性设置为Grid。
以下是设置行属性的步骤:
在Xamarin.Forms项目中创建一个新页面。
在XAML文件中添加一个Grid控件,设置行数和列数。
<Grid x:Name="grid">
<Grid.RowDefinitions>
<RowDefinition Height="Auto" />
<RowDefinition Height="Auto" />
<RowDefinition Height="Auto" />
</Grid.RowDefinitions>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="*" />
<ColumnDefinition Width="*" />
</Grid.ColumnDefinitions>
</Grid>
Label label1 = new Label { Text = "Label 1" };
Label label2 = new Label { Text = "Label 2" };
Label label3 = new Label { Text = "Label 3" };
Entry entry1 = new Entry { Placeholder = "Entry 1" };
Entry entry2 = new Entry { Placeholder = "Entry 2" };
Entry entry3 = new Entry { Placeholder = "Entry 3" };
grid.Children.Add(label1, 0, 0);
grid.Children.Add(entry1, 1, 0);
Grid.SetRow(label1, 0);
Grid.SetRow(entry1, 0);
grid.Children.Add(label2, 0, 1);
grid.Children.Add(entry2, 1, 1);
Grid.SetRow(label2, 1);
Grid.SetRow(entry2, 1);
grid.Children.Add(label3, 0, 2);
grid.Children.Add(entry3, 1, 2);
Grid.SetRow(label3, 2);
Grid.SetRow(entry3, 2);
以上代码将创建三个标签和三个输入框,并将它们全部添加到Grid中。之后,我们通过Grid.SetRow方法将它们每一项设置为对应的行。
在Xamarin.Forms中,我们可以轻松地使用C#将表单元素的行属性设置为Grid。这样,我们就可以让表单在网格中以最佳方式布局了。
完整代码可以在下面获得:
<ContentPage xmlns="http://xamarin.com/schemas/2014/forms"
xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
x:Class="GridDemo.MainPage">
<Grid x:Name="grid">
<Grid.RowDefinitions>
<RowDefinition Height="Auto" />
<RowDefinition Height="Auto" />
<RowDefinition Height="Auto" />
</Grid.RowDefinitions>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="*" />
<ColumnDefinition Width="*" />
</Grid.ColumnDefinitions>
</Grid>
</ContentPage>
using System;
using Xamarin.Forms;
namespace GridDemo
{
public partial class MainPage : ContentPage
{
public MainPage()
{
InitializeComponent();
Label label1 = new Label { Text = "Label 1" };
Label label2 = new Label { Text = "Label 2" };
Label label3 = new Label { Text = "Label 3" };
Entry entry1 = new Entry { Placeholder = "Entry 1" };
Entry entry2 = new Entry { Placeholder = "Entry 2" };
Entry entry3 = new Entry { Placeholder = "Entry 3" };
grid.Children.Add(label1, 0, 0);
grid.Children.Add(entry1, 1, 0);
Grid.SetRow(label1, 0);
Grid.SetRow(entry1, 0);
grid.Children.Add(label2, 0, 1);
grid.Children.Add(entry2, 1, 1);
Grid.SetRow(label2, 1);
Grid.SetRow(entry2, 1);
grid.Children.Add(label3, 0, 2);
grid.Children.Add(entry3, 1, 2);
Grid.SetRow(label3, 2);
Grid.SetRow(entry3, 2);
}
}
}