问题:如何在C#中使用ItemsWrapGrid布局制作网格?
上下文
> UWP
> Visual Studio 2015
> Windows 10
> C#
背景
我知道如何在XAML中制作它.在Visual Studio 2015中创建新的UWP应用程序后,XAML是:
<Page
x:Class="WrapGridTest001.MainPage"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:local="using:WrapGridTest001"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
mc:Ignorable="d"
MinWidth="10"
MinHeight="10"
>
<Grid x:Name="thisGrid">
<GridView x:Name="thisGridView" IsItemClickEnabled="True">
<GridView.ItemsPanel>
<ItemsPanelTemplate>
<ItemsWrapGrid
x:Name="thisItemsWrapGrid"
Orientation="Horizontal"
MaximumRowsOrColumns="5"
/>
</ItemsPanelTemplate>
</GridView.ItemsPanel>
<TextBlock Text="#1"/>
<TextBlock Text="#2"/>
<TextBlock Text="#3"/>
</GridView>
</Grid>
</Page>
为了以编程方式进行编程,我已将其从XAML中取出:
<Page
x:Class="WrapGridTest001.MainPage"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:local="using:WrapGridTest001"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
mc:Ignorable="d"
MinWidth="10"
MinHeight="10"
>
</Page>
并尝试在Page的构造函数中重现它:
public MainPage()
{
this.InitializeComponent();
// Make the Grid and set it to be the Page's .Content:
Grid grid = new Grid();
this.Content = grid;
// Make the GridView for the Grid, then set it:
GridView gridView = new GridView();
grid.Children.Add(gridView);
// Make the ItemsPanelTemplate; necessary?
ItemsPanelTemplate itemsPanelTemplate = new ItemsPanelTemplate();
gridView.ItemsPanel = itemsPanelTemplate;
// Make the ItemsWrapGrid. Can't figure out how to set this.
ItemsWrapGrid itemsWrapGrid = new ItemsWrapGrid();
// When I traced the XAML version, its ItemsWrapGrid was apparently under
// gridView.ItemsPanelRoot
// , but that's a get-only property. I can't find a place to set it.
// Add the TextBlock's with "#1", "#2", and "#3":
for (int i = 1; i <= 3; ++i)
{
TextBlock textBlock = new TextBlock();
textBlock.Text = "#" + i.ToString();
gridView.Items.Add(textBlock);
}
// All done. However, this Grid will show contents with a vertical alignment
// rather than a horizontal one.
}
我需要添加哪些附加代码来在C#中设置ItemsWrapGrid,因为它是在XAML中设置的?目前C#代码创建了ItemsWrapGrid,但ItemsWrapGrid实际上并未在任何地方设置,因为到目前为止每次尝试使用它都会导致某种类型的错误.
解决方法:
你需要的是XamlReader
string template =
"<ItemsPanelTemplate xmlns=\"http://schemas.microsoft.com/winfx/2006/xaml/presentation\" xmlns:x=\"http://schemas.microsoft.com/winfx/2006/xaml\"><ItemsWrapGrid VerticalAlignment = \"Top\" "
+ " ItemWidth = \""
+ itemWidth
+ "\" Orientation = \"Horizontal\"/></ItemsPanelTemplate> ";
yourgridview.ItemsPanel = (ItemsPanelTemplate)XamlReader.Load(template);