c# - WPF如何创建选项卡项

Question

选项卡项目的数量不是预先确定的。我只想创建新的选项卡项，然后在当前项中添加新的矩形。
我正在生成新的选项卡项目(下面是代码)，但是如何在当前选项卡中添加矩形？

var _FloorName = (from fn in db.floors select fn.floorname).ToList();

if (_FloorName.Count > 0)
{
    for (int i = 0; i < _FloorName.Count; i++)
    {
        tabControl1.Items.Add(_FloorName[i]);
    }
}

Answer 1

这是您可以采取的一种方法:

添加 Grid (或其他容器)到每个 TabItem创建它们时

创建 Rectangle , 用你想要的画笔/尺寸

调用 tabControl1.SelectedContent , 将其转换为 Grid (或您的容器类型)

调用 grid.Children.Add(rectangle)

这是一个完整的代码示例(使用丰富的代码隐藏)。

MainWindow.xaml:

<Window x:Class="MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        Title="MainWindow" Height="350" Width="525">
    <StackPanel Margin="12">
        <TabControl Name="tabControl1" Height="250" />
        <Button Content="Add Rectangle" Click="Button_Click"
                Width="90" Height="25" Margin="5" />
    </StackPanel>
</Window>

MainWindow.xaml.cs:

using System;
using System.Collections.Generic;
using System.Linq;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Media;
using System.Windows.Shapes;

public class Floor
{
    public Floor(string name = null)
    {
        this.Name = name;
    }

    public string Name { get; set; }
}

public class FakeDb
{
    public IEnumerable<Floor> Floors
    {
        get
        {
            return new List<Floor>()
            {
                new Floor("floor1"),
                new Floor("floor2"),
                new Floor("floor3"),
            };
        }
    }
}

public partial class MainWindow : Window
{
    public MainWindow()
    {
        InitializeComponent();
        InitializeTabControl();
    }

    private void InitializeTabControl()
    {
        var db = new FakeDb();
        var floorNames = (from fn in db.Floors select fn.Name).ToList();

        foreach (string floorName in floorNames)
        {
            var item = new TabItem()
            {
                Header = floorName,
                Content = new Grid(),
            };
            tabControl1.Items.Add(item);
        }
    }

    private void Button_Click(object sender, RoutedEventArgs e)
    {
        var random = new Random();
        var rectangle = new Rectangle()
        {
            Stroke = Brushes.Black,
            Fill = Brushes.SkyBlue,
            Width = 50,
            Height = 75,
            Margin = new Thickness(
                left: random.NextDouble() * 300,
                top: random.NextDouble() * 150,
                right: 0,
                bottom: 0),
            HorizontalAlignment = HorizontalAlignment.Left,
            VerticalAlignment = VerticalAlignment.Top,
        };
        var grid = (Grid)tabControl1.SelectedContent;
        grid.Children.Add(rectangle);
    }
}