如何在列表视图的项目中引用控件或视图

本文介绍了如何在列表视图的项目中引用控件或视图-Xamarin Forms的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！ 问题描述

我有一种情况，例如，在ListView中，每个项目中都有两个Label和一个自定义的水平列表.

I have a scenario like, in a ListView I have two Labels and a custom made horizontal List in each item.

水平列表-滚动视图中水平方向的标签堆栈.

Horizontal List - stack of Labels in a ScrollView with orientation horizontal.

我需要的是，我想引用一个位于ListView特定项目的水平列表"内的标签，然后将水平列表"中的选定标签设置为粗体.有没有办法引用ListView项目的控件?

What I need is, I want to refer a Label which is inside the Horizontal List of a particular item of the ListView and make the selected Label from the Horizontal List to Bold. Is there a way to refer a control of ListView item?

下面是填充我的ListView的代码

Below is the code for filling my ListView

myListView = new ListView { // Source of data items. ItemsSource = itemsource, HasUnevenRows = true, RowHeight = -1, ItemTemplate = new DataTemplate(() => { Label label1 = new Label() { TextColor = Color.Black, HorizontalTextAlignment = TextAlignment.Start, FontSize = Device.GetNamedSize(NamedSize.Small, new Label()) }; label1.SetBinding<LVItem>(Label.TextProperty, indexer => indexer.Name); Label label2 = new Label() { TextColor = Color.Black, HorizontalTextAlignment = TextAlignment.Start, FontSize = Device.GetNamedSize(NamedSize.Small, new Label()) }; label2.SetBinding<LVItem>(Label.TextProperty, indexer => indexer.SelectedNum); //horizontal list StackLayout sLayout = new StackLayout() { Orientation = StackOrientation.Horizontal, }; for (int i = 0; i<itemLst.Count; i++) { Label label3 = new Label() { HorizontalTextAlignment = TextAlignment.Center, TextColor = Color.Black, FontSize = Device.GetNamedSize(NamedSize.Medium, new Label()) }; label3.Text = itemLst[i]; gestureRecognizer = new TapGestureRecognizer { Command = new Command(TapL_Tapped), CommandParameter = label3, }; label3.GestureRecognizers.Add(gestureRecognizer); sLayout.Children.Add(label3); } ScrollView scroll = new ScrollView { Orientation = ScrollOrientation.Horizontal, Content = new StackLayout { Children = { sLayout } } }; AbsoluteLayout layout = new AbsoluteLayout(); AbsoluteLayout.SetLayoutFlags(label1, AbsoluteLayoutFlags.All); AbsoluteLayout.SetLayoutBounds(label1, new Rectangle(0.2, 0.2, 0.8, 0.25)); AbsoluteLayout.SetLayoutFlags(scroll, AbsoluteLayoutFlags.All); AbsoluteLayout.SetLayoutBounds(scroll, new Rectangle(0.3, 0.6, 0.8, 0.2)); AbsoluteLayout.SetLayoutFlags(label2, AbsoluteLayoutFlags.All); AbsoluteLayout.SetLayoutBounds(label2, new Rectangle(1.1, 0.3, 0.5, 0.2)); layout.Children.Add(label1); layout.Children.Add(scroll); layout.Children.Add(label2); return new ViewCell { View = new StackLayout { Children = { layout, } } }; } )};

推荐答案

您可以使用ItemTapped查找正在点击列表视图中的哪个项目.要使文本加粗，应在字体上使用绑定.然后在您的代码隐藏中，您可以切换该绑定的值，因此字体也会更改. 让我知道这是否对您有用！

You can use the ItemTapped to find which item of your listview is getting tapped. To get the text bold you should use a binding on your font. then in your codebehind you can switch the value of that binding and so will your font change. Let me know if this worked for you!