WPF Binding 基础

本文主要是介绍WPF Binding 基础，对大家解决编程问题具有一定的参考价值，需要的程序猿们随着小编来一起学习吧！

1. 绑定CLR对象属性

2.绑定控件属性

3.获取字符串指定字符的值

4.显示集合子元素的属性

5.绑定基本数据类型的值

6.没有指定Path，Binding会把控件的DataContext当做自己的Source

7.通过 ElementName指定source，也可以把控件本身赋给Source

8.可以绑定ListBox的selectedItem的属性

<Window x:Class="WpfDemo.BindData1"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        Title="BindData1" Height="505.639" Width="473.684"
        xmlns:sys="clr-namespace:System;assembly=mscorlib"
        xmlns:local="clr-namespace:WpfDemo"
        >
    <Grid>
        <StackPanel>
            <StackPanel.Resources>
                <sys:String x:Key="myString">
                    菩提本无树，明镜亦非台。
                    本来空一物，何处惹尘埃。
                </sys:String>
            </StackPanel.Resources>
            <StackPanel.DataContext>
                <local:Employee name="zhangsan" age="30"></local:Employee>
            </StackPanel.DataContext>
            <TextBox x:Name="textName" Height="35" TextWrapping="Wrap" Text="TextBox"/>
            <Button Content="Button" Height="31" Click="Button_Click"/>
            <Button Content="Button" Height="31" Click="Button_Click_1"/>
            <TextBox Height="31" Text="{Binding Path=Value, ElementName=slider, UpdateSourceTrigger=PropertyChanged}" TextWrapping="Wrap"/>
            <Slider Maximum="100" Minimum="0" x:Name="slider"/>
            <TextBox x:Name="txt1" Text="{Binding Path=Text[3],ElementName=txt2,Mode=OneWay}" Height="23" TextWrapping="Wrap"/>
            <TextBox x:Name="txt2" Height="23" TextWrapping="Wrap" />

            <TextBox x:Name="txt3" Height="23" TextWrapping="Wrap" />
            <TextBox x:Name="txt4" Height="23" TextWrapping="Wrap" />
            <TextBox x:Name="txt5" Height="23" TextWrapping="Wrap" />

            <TextBox x:Name="txt6" Text="{Binding Path=.,Source={StaticResource ResourceKey=myString}}" Height="48" TextWrapping="Wrap" />

            <TextBox Height="23" TextWrapping="Wrap" Text="{Binding name}"></TextBox>
            <TextBox Height="23" TextWrapping="Wrap" Text="{Binding age}"></TextBox>

            <TextBox x:Name="txt7" Height="23" TextWrapping="Wrap"></TextBox>
            <ListBox x:Name="listBox1" Height="50">
                <ListBox.ItemTemplate>
                    <DataTemplate>
                        <StackPanel Orientation="Horizontal">
                            <TextBlock Text="{Binding Path=name}" Width="150"></TextBlock>
                            <TextBlock Text="{Binding Path=age}" Width="150"></TextBlock>
                        </StackPanel>
                    </DataTemplate>
                </ListBox.ItemTemplate>
            </ListBox>
        </StackPanel>
    </Grid>
</Window>

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Shapes;

namespace WpfDemo
{
    /// <summary>
    /// BindData1.xaml 的交互逻辑
    /// </summary>
    public partial class BindData1 : Window
    {
        public Employee ee;
        public BindData1()
        {
            InitializeComponent();

            //Binding bind = new Binding();
            //bind.Source = ee;
            //bind.Path = new PropertyPath("name");

            //BindingOperations.SetBinding(this.textName,TextBox.TextProperty,bind);
            ee = new Employee();
            this.textName.SetBinding(TextBox.TextProperty,new Binding("name"){Source=ee});
            //this.textName.SetBinding(TextBox.TextProperty, new Binding("Value") { Source = this.slider });

            // 绑定 控件 属性      一般都是讲控件给source，而不是elementname
            //this.SetBinding(TextBox.TextProperty, new Binding("Value") { ElementName = "slider" });

            this.txt2.SetBinding(TextBox.TextProperty, new Binding("/") {Source=new string[]{"111","222","333"} });


            List<city> CityList1 = new List<city> { new city() { Name = "淮安" }, new city() { Name = "南京" } };
            Province p1 = new Province() {Name="江苏",CityList=CityList1 };

            List<city> CityList2 = new List<city> { new city() { Name = "马鞍山" }, new city() { Name = "合肥" } };
            Province p2 = new Province() { Name = "浙江", CityList = CityList2 };

            List<Province> provinceList = new List<Province> { p1,p2 };
            Country country = new Country() { Name = "中国", ProvinceList = provinceList };

            List<Country> countryList = new List<Country>() { country };
            this.txt3.SetBinding(TextBox.TextProperty, new Binding("/Name") { Source = countryList });
            this.txt4.SetBinding(TextBox.TextProperty, new Binding("/ProvinceList/Name") { Source = countryList });
            this.txt5.SetBinding(TextBox.TextProperty, new Binding("/ProvinceList/CityList/Name") { Source = countryList });




            List<Employee> eelist = new List<Employee>() {
                new Employee(){name="zhangsan",age=30},
                new Employee(){name="lisi",age=40},
                new Employee(){name="wangwu",age=50},
            };
            this.listBox1.ItemsSource = eelist;
            //this.listBox1.DisplayMemberPath = "name";  前端设定显示路径

            this.txt7.SetBinding(TextBox.TextProperty, new Binding("SelectedItem.age") { Source = this.listBox1 });
        }

        private void Button_Click(object sender, RoutedEventArgs e)
        {
            this.ee.name += "NAME:";
        }

        private void Button_Click_1(object sender, RoutedEventArgs e)
        {
            this.ee.name = "";
        }

        
    }
    class city
    {
        public string Name { get; set; }
    }
    class Province
    {
        public string Name { get; set; }
        public List<city> CityList { get; set; }
    }
    class Country
    {
        public string Name { get; set; }
        public List<Province> ProvinceList { get; set; }
    }

    public class Employee : INotifyPropertyChanged
    {
        private string _name;
        public string name
        {
            set
            {
                _name = value;
                if (this.PropertyChanged != null)
                {
                    this.PropertyChanged.Invoke(this, new PropertyChangedEventArgs("name"));
                }
            }
            get { return _name; }
        }
        public int age { set; get; }


        public event PropertyChangedEventHandler PropertyChanged;
    }

}

这篇关于WPF Binding 基础的文章就介绍到这儿，希望我们推荐的文章对大家有所帮助，也希望大家多多支持为之网！