WPF 自定义结构，
若要绑定到附加属性，应在附加属性周围放置圆括号。例如，若要绑定到附加属性
DockPanel..::.Dock，则语法是 Path=(DockPanel.Dock)
1.WPF界面可引用的自定义结构
界面只能绑定公共属性，如果是引用其它应用程序的话要先用clr-namespace映射命名空间。
public class Product:INotifyPropertyChanged
{
//////////////// 这里缺少PropertyChanged相关的代码的话，在动态修改内存时，不会反应到界面上
public event PropertyChangedEventHandler PropertyChanged;
public void OnPropertyChanged(PropertyChangedEventArgs e)
{
if (PropertyChanged != null)
PropertyChanged(this, e);
}
////////////////////////////////////////////////////////
private string modelNumber;
public string ModelNumber
{
get { return modelNumber; }
set {
modelNumber = value;
OnPropertyChanged(new PropertyChangedEventArgs("ModelNumber"));
}
}
private string modelName;
public string ModelName
{
get { return modelName; }
set {
modelName = value;
OnPropertyChanged(new PropertyChangedEventArgs("ModelName"));
}
}
private decimal unitCost;
public decimal UnitCost
{
get { return unitCost; }
set {
unitCost = value;
OnPropertyChanged(new PropertyChangedEventArgs("UnitCost"));
}
}
private string description;
public string Description
{
get { return description; }
set {
description = value;
OnPropertyChanged(new PropertyChangedEventArgs("Description"));
}
}
public Product(string modelNumber, string modelName,
decimal unitCost, string description)
{
ModelNumber = modelNumber;
ModelName = modelName;
UnitCost = unitCost;
Description = description;
}
}
public class StoreDB
{
public Product GetProduct(int ID)
{
return new Product(ID.ToString(), ID.ToString(), 0, ID.ToString());
}
}
2，绑定数据源
非列表： Product dct; dct = this.StoreDB.GetProduct(1); userWnd.gridProductDetails.DataContext = dct; 列表： List<Product> ducts = new List<Product>(); for (int i = 0; i < 10; ++i ) ducts.Add(this.StoreDB.GetProduct(1)); userWnd.myListBox.ItemsSource = ducts;
若要想列表拥有更改通知控件的功能则需要用如下：
ObservableCollection BindingList 都实现了INotifyCollectionChanged接口，拥有通知控件更改功能。
ObservableCollection System.Collections.ObjectModel;
BindingList System.ComponentModel;
ObservableCollection<Product> ducts = new ObservableCollection<Product>();
BindingList<Product> ducts = new BindingList<Product>();
列表绑定：
当一个列表无素被绑定到容器上时，对于列表，可以显示所有项，对于单个对于支持绑定到列表上的元素(如 列表框,,会绑定整个列表。对于只支持绑定一个对象上的元素(如 文本框），只绑定当前项。容器会有一个当前元素的索引，IsSynchronizedWithCurrentItem可以同步当前索引元素从而达到其它绑定的无素也会变化。
<DockPanel x:Name="myGrid" DataContext="{StaticResource MyDataProvider}"> <ListBox DockPanel.Dock="Bottom" Grid.Row="0" ItemsSource="{Binding}" IsSynchronizedWithCurrentItem="True"></ListBox> <TextBox Text="{Binding ModelNumber}" Grid.Row="0" Margin="5"/> <TextBox Text="{Binding ModelName}" Grid.Row="1" /> <Grid> <Grid.RowDefinitions> <RowDefinition Height="Auto"/> <RowDefinition Height="Auto"/> </Grid.RowDefinitions> <TextBox Text="{Binding ModelNumber}" Grid.Row="0" Grid.Column="1" Margin="5" /> <TextBox Text="{Binding ModelName}" Grid.Row="1" Grid.Column="1" Margin="5" /> </Grid> </DockPanel>
//TreeView 树列表绑定实时更新方式 其它控件可参考这两种方式
<TreeView ItemsSource="{Binding Source={StaticResource myEmployeeData}, XPath=EmployeeInfo}" Name="myTreeView" SelectedValuePath="EmployeeNumber" /> <TextBlock Height ="25" Margin="10,0,0,0" Text="{Binding ElementName=myTreeView,Path=SelectedValue}"Foreground="Blue"/>
<TextBlock Height=" 30" Text="{Binding ElementName=treeView0,Path=SelectedValue.key}"/>
ObjectDataProvider 绑定：
<ObjectDataProvider x:Key="DATA_TreeViewList" ObjectType="{x:Type local:ListKeyFactory}" MethodName="GetKeys"/> <ObjectDataProvider x:Key="DATA_TreeViewList1" ObjectType="{x:Type local:ListLeagueList}"/>
WPF控件多对一的绑定 <Window.Resources> <local:HasSelectionNICAndProfileConverter x:Key="HasSelectionNICAndProfileConverter"/> </Window.Resources> <ListBox x:Name="ListBox1" ItemsSource="{Binding}"/> <TreeView x:Name="Tree1" ItemsSource="{Binding }" ItemTemplate="{StaticResource TemplateX}"/> <TextBox x:Name="ThyBox" > <TextBox.Text> <MultiBinding Converter="{StaticResource HasSelectionNICAndProfileConverter}" Mode="OneWay"> <Binding ElementName="ListBox1" Path="SelectedItem"/> <Binding ElementName="Tree1" Path="SelectedItem"/> </MultiBinding> </TextBox.Text> </TextBox> public class HasSelectionNICAndProfileConverter : IMultiValueConverter { public object Convert(object[] values, Type targetType, object parameter, System.Globalization.CultureInfo culture) { object NICSelection = values[0]; object ProfileSelection = values[1]; if (NICSelection != null && ProfileSelection != null) return "Selected"; else return "UNSelected"; } public object[] ConvertBack(object values, Type[] targetType, object parameter, System.Globalization.CultureInfo culture) { return null; } } 这里的代码实现了，只有当两个TreeView同时有项被选中时，TextBlock中才会显示Selected。
3.数据转换
public class MyConvert : IValueConverter
{
#region IValueConverter 成员
public object Convert(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
{
if (value.GetType() == typeof(TextBox))
return ((decimal)value).ToString("C");
return null;
}
public object ConvertBack(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
{
string mypric = value.ToString();
decimal pri;
if (decimal.TryParse(mypric, System.Globalization.NumberStyles.Any, culture, out pri))
{
return pri;
}
return value;
}
#endregion
}
<local:MyConvert x:Key="DATA_TreeViewSelectItemConvert"></local:MyConvert>
<TextBlock Height=" 30" Text="{Binding Source=(treeView0.Item.TextBox), Converter={StaticResource DATA_TreeViewSelectItemConvert}}"/> //指定绑定转换器
<MultiBinding Converter="{StaticResource myNameConverter}" ConverterParameter="FormatLastFirst">
3.切换控件风格（可以定义不同外观的风格）
object var = FindResource("CtrlStyleComboBox"); if (var != null && var.GetType() == typeof(Style)) comboxxxxxx.Style = var as Style;
//获取控件默认风格
<Style x:Key="CtrlStyleComboBox1" TargetType="ComboBox" BasedOn="{StaticResource {x:Type ComboBox}}">
</Style>
3.XmlDataProvider定义
<XmlDataProvider x:Key="xmlProder" XPath="/Items/*"> <x:XData> <Items xmlns=""> //xmlns=""一定要加，上面XPath指定了导出Items下的所有集合，即一个列表 每个标签可以作为类型名直接XPath=Type引用，而属性则要用XPath=@Name <Item Name="000" ShortCut="aaa"> <combox Name="000"/> <combox Name="001"/> <combox Name="002"/> <combox Name="003"/> <combox Name="004"/> <combox Name="005"/> </Item> <Item Name="001" ShortCut="bbb"> <combox Name="000"/> <combox Name="001"/> <combox Name="002"/> <combox Name="003"/> <combox Name="004"/> <combox Name="005"/> </Item> <Item Name="002" ShortCut="ccc"> <combox Name="000"/> <combox Name="001"/> <combox Name="002"/> <combox Name="003"/> <combox Name="004"/> <combox Name="005"/> </Item> </Items> </x:XData> </XmlDataProvider>
4.ICommand接口的使用
C#方式 设计并不好，仅代表如何使用而已。 public RoutedCommand cmd; public MainWindow() { InitializeComponent(); cmd = new RoutedCommand(); CommandBinding bind = new CommandBinding(cmd); bind.Executed += Execute; bind.CanExecute += CanExecute; this.CommandBindings.Add(bind); _myButton.Command = cmd; } public void CanExecute(object parameter, CanExecuteRoutedEventArgs e) { if (_myBox.Text == null || _myBox.Text == "") { e.CanExecute = false; } else { e.CanExecute = true; } } private void Execute(object parameter, ExecutedRoutedEventArgs e) { string msg = "引发事件的类型：{0}，命令目标的类型：{1}，命令目标的Name：{2}"; System.Diagnostics.Debug.WriteLine( string.Format(msg, parameter.GetType().Name, e.Source.GetType().Name, (e.Source as FrameworkElement).Name )); MessageBox.Show(_myBox.Text); }
xaml方式：仅代表如何使用 public class CMDClass { public static RoutedCommand cmd; static CMDClass() { cmd = new RoutedCommand(); } public void CanExecute(object parameter, CanExecuteRoutedEventArgs e) { if (_myBox.Text == null || _myBox.Text == "") { e.CanExecute = false; } else { e.CanExecute = true; } } private void Execute(object parameter, ExecutedRoutedEventArgs e) { string msg = "引发事件的类型：{0}，命令目标的类型：{1}，命令目标的Name：{2}"; System.Diagnostics.Debug.WriteLine( string.Format(msg, parameter.GetType().Name, e.Source.GetType().Name, (e.Source as FrameworkElement).Name )); MessageBox.Show(_myBox.Text); } } <Window.CommandBindings> <CommandBinding Command="local:CMDClass.cmd" Executed="Execute" CanExecute="CanExecute"/> </Window.CommandBindings> <Grid> <Grid.RowDefinitions> <RowDefinition Height="*"/> <RowDefinition Height="*"/> <RowDefinition Height="*"/> </Grid.RowDefinitions> <TextBox Name="_myBox" Grid.Row="0" Text="我是个好学生！"/> <Button Name="_myButton" Grid.Row="1" Command="local:CMDClass.cmd"/> </Grid>
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