Wpf的comboBox怎么绑定数据？

Posted 2023-03-24

Wpf的comboBox怎么绑定数据？数据是从数据库读取出来的，显示的是类别的名称，点击提交时提交的是类别的ID，这要怎么做？

WPF中提供了数据绑定的功能，操作起来很方便，集合类的控件几乎都可以用数据源来进行数据的绑定，下面操作一下下拉列表框控件ComboBox控件的数据绑定操作。
要绑定到ComboBox控件的自定义类:
public class LocationRoad

public int ID set; get;
public string Code set; get;
public string Info set; get;

建立数据源，就将此数据集合当作数据源绑定到ComboBox:
///
/// 当ComboBox选中项更改时发生
///
private LocationRoad _selectLocation;
public LocationRoad SelectLocation

get

return this._selectLocation;

set

this._selectLocation = value;
if (this.PropertyChanged != null)
PropertyChanged(this, new PropertyChangedEventArgs("SelectLocation"));



private ObservableCollection _locationRoad = null;

public ObservableCollection LocationSource

get

if (this._locationRoad == null)

this._locationRoad = new ObservableCollection()
new LocationRoad() ID = 1, Code = "NGQ", Info = "南岗区" ,
new LocationRoad() ID = 2, Code = "DLQ", Info = "道里区" ,
new LocationRoad() ID = 3, Code = "DWQ", Info = "道外区" ,
new LocationRoad() ID = 4, Code = "PFQ", Info = "平房区" ,
new LocationRoad() ID = 5, Code = "XFQ", Info = "香坊区" ,
;


return this._locationRoad;

set

this._locationRoad = value;
if (this.PropertyChanged != null)
PropertyChanged(this, new PropertyChangedEventArgs("LocationSource"));

参考技术A 把要帮定的值先从数据库里读出来，再放到集合里 循环读取就可以了
求采纳为满意回答。 参考技术B <ComboBox Name="fooBarComboBox" 
          ItemsSource="Binding Path=ExampleEnumsWithCaptions" 
          DisplayMemberPath="Value" 
          SelectedValuePath="Key"
          SelectedValue="Binding Path=ExampleProperty, Mode=TwoWay" >

WPF Combobox数据绑定Binding

combobox数据绑定List链表集合区分显示值与选择的值

整体效果：

根据combobox选择情况分别打印选取值与显示值

代码：

Windows窗体：

 1 <Window x:Class="ComboxBinding.MainWindow"
 2         xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
 3         xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
 4         Title="ComBox绑定" Height="192.857" Width="385" WindowStartupLocation="CenterScreen" Loaded="Window_Loaded">
 5     <Grid>
 6         <ComboBox Name="comBox1" HorizontalAlignment="Left" Margin="74,10,0,0" Width="209" Height="22" VerticalAlignment="Top"/>
 7         <TextBlock Name="txtSelectedValue" Width="200" Text="{Binding ElementName=comBox1, Path=SelectedValue}" HorizontalAlignment="Left" Margin="115,58,0,0" TextWrapping="Wrap" VerticalAlignment="Top" Background="#FFE7FBFA"/>
 8         <TextBlock Name="txtSelectedText" Width="200" Text="{Binding ElementName=comBox1, Path=Text}" HorizontalAlignment="Left" Margin="114,88,0,0" TextWrapping="Wrap" VerticalAlignment="Top" Background="#FFE7FBFA"/>
 9         <Label Content="selectedValue" HorizontalAlignment="Left" Margin="2,58,0,0" VerticalAlignment="Top"/>
10         <Label Content="selectedText" HorizontalAlignment="Left" Margin="10,86,0,0" VerticalAlignment="Top"/>
11 
12     </Grid>
13 </Window>

Xaml

窗体cs代码

 1 using System.Collections.Generic;
 2 using System.Windows;
 3 
 4 namespace ComboxBinding
 5 {
 6     /// <summary>
 7     /// MainWindow.xaml 的交互逻辑
 8     /// </summary>
 9     public partial class MainWindow : Window
10     {
11         public MainWindow()
12         {
13             InitializeComponent();
14         }
15 
16         private void Window_Loaded(object sender, RoutedEventArgs e)
17         {
18             List<ComboxBind> lstCmbBind = new List<ComboxBind>();//用于绑定数据源
19 
20             //初始化数据源
21             ComboxBind cbb = new ComboxBind("显示值1", "选取值1");
22             lstCmbBind.Add(cbb);
23             cbb = new ComboxBind("显示值2", "选取值2");
24             lstCmbBind.Add(cbb);
25             cbb = new ComboxBind("显示值3", "选取值3");
26             lstCmbBind.Add(cbb);
27 
28             this.comBox1.ItemsSource = lstCmbBind;
29             comBox1.DisplayMemberPath = "CmbText";//类ComboxBind中的属性
30             comBox1.SelectedValuePath = "CmbValue";//类ComboxBind中的属性
31         }
32     }
33 }

View Code

 用于绑定combobox的类

 1 namespace ComboxBinding
 2 {
 3     /// <summary>
 4     /// 用于Combox数据绑定
 5     /// </summary>
 6     class ComboxBind
 7     {
 8         //构造函数
 9         public ComboxBind(string _cmbText, string _cmbValue)
10         {
11             this.cmbText = _cmbText;
12             this.cmbValue = _cmbValue;
13         }
14 
15         //用于显示值
16         private string cmbText;
17         public string CmbText
18         {
19             get { return cmbText; }
20             set { cmbText = value; }
21         }
22 
23         //用于实际选取的值
24         private string cmbValue;
25         public string CmbValue
26         {
27             get { return cmbValue; }
28             set { cmbValue = value; }
29         }
30     }
31 }

C#