如何使用纯 MVVM 概念和依赖注入，将不同面板上可用的 XamDataGrids 与 WPF 页面上的不同集合绑定。
How to bind XamDataGrids available on different panels with different collections on a WPF page, using pure MVVM concepts & dependency injection.
我有一个 WPF XAML 页面，有 3 个部分，由 DockPanel 分隔。一个面板包含一个要与集合绑定的 INFRAGITICS XamDataGrid 控件。
- 我想以纯 MVVM 方式使用 DataContext/DataSource 属性 绑定 XamDataGrid 控件。
- 此外，很高兴了解绑定是否通过依赖项注入完成。
我尝试了不同的方法，但没有成功。我在下面粘贴了我的代码以供参考。请帮忙。
XAML 页数：
<Window x:Class="UserInterface.MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
xmlns:local="clr-namespace:UserInterface"
xmlns:igDP="clr-namespace:Infragistics.Windows.DataPresenter;assembly=InfragisticsWPF.DataPresenter"
xmlns:igEditors="clr-namespace:Infragistics.Windows.Editors;assembly=InfragisticsWPF.Editors"
xmlns:sys="clr-namespace:System;assembly=mscorlib"
xmlns:dc ="clr-namespace:UserInterface.ViewModel"
xmlns:diag="clr-namespace:System.Diagnostics;assembly=WindowsBase"
mc:Ignorable="d"
Title="MainWindow">
<Window.Resources>
<dc:GraphicViewModel x:Key="dataContext"/>
</Window.Resources>
<Grid>
<Grid.RowDefinitions>
<RowDefinition Height=".5*"/>
<RowDefinition Height=".5*"/>
</Grid.RowDefinitions>
<Grid.ColumnDefinitions>
<ColumnDefinition Width=".5*"/>
<ColumnDefinition Width=".5*"/>
</Grid.ColumnDefinitions>
<DockPanel Grid.Column="0" Grid.Row="0">
<Grid>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="Auto"/>
<ColumnDefinition Width="Auto"/>
<ColumnDefinition Width="Auto"/>
</Grid.ColumnDefinitions>
<Grid.RowDefinitions>
<RowDefinition Height="Auto"/>
<RowDefinition Height="Auto"/>
<RowDefinition Height="Auto"/>
<RowDefinition Height="Auto"/>
<RowDefinition Height="Auto"/>
</Grid.RowDefinitions>
</Grid>
<!--<StackPanel Orientation="Vertical" DockPanel.Dock="Top">
<StackPanel Orientation="Horizontal" Margin="5" Grid.Row="0">
<DockPanel>
<TextBlock Text="*.cfg File" Grid.Column="0" DockPanel.Dock="Left"/>
<Button Content="Browse..." Grid.Column="2" DockPanel.Dock="Right"/>
<TextBox FontStyle="Italic" FontWeight="Light" Text="Browse *.cfg file..." Grid.Column="1" DockPanel.Dock="Right"/>
</DockPanel>
</StackPanel>
<StackPanel Orientation="Horizontal" Margin="5" Grid.Row="1">
<TextBlock Text="*.ps File " Grid.Column="0"/>
<TextBox FontStyle="Italic" FontWeight="Light" Text="Browse *.ps file..." Grid.Column="1"/>
<Button Content="Browse..." Grid.Column="2"/>
</StackPanel>
<StackPanel Orientation="Horizontal" Margin="5" Grid.Row="2">
<TextBlock Text="*.pic File " Grid.Column="0"/>
<TextBox FontStyle="Italic" FontWeight="Light" Text="Browse *.pic file..." Grid.Column="1"/>
<Button Content="Browse..." Grid.Column="2"/>
</StackPanel>
<StackPanel Orientation="Horizontal" Margin="5" Grid.Row="3">
<TextBlock Text="*.xlsx File" Grid.Column="0"/>
<TextBox FontStyle="Italic" FontWeight="Light" Text="Browse *.xlsx file..." Grid.Column="1"/>
<Button Content="Browse..." Grid.Column="2"/>
</StackPanel>
<StackPanel Orientation="Horizontal" Margin="5" Grid.Row="4">
<TextBlock Text="*.xlsx File"/>
<TextBox FontStyle="Italic" FontWeight="Light" Text="Browse *.xlsx file..." Grid.Column="1"/>
<Button Content="Browse..." Grid.Column="2"/>
</StackPanel>
</StackPanel>-->
<StackPanel Orientation="Horizontal">
<StackPanel Orientation="Vertical" Margin="5" Grid.Row="0">
<TextBlock MinHeight="20.5" Text="*.cfg File" Grid.Column="0"/>
<TextBlock MinHeight="20.5" Text="*.ps File " Grid.Column="0"/>
<TextBlock MinHeight="20.5" Text="*.pic File " Grid.Column="0"/>
<TextBlock MinHeight="20.5" Text="*.xlsx File" Grid.Column="0"/>
<TextBlock MinHeight="20.5" Text="*.xlsx File" Grid.Column="0"/>
</StackPanel>
<StackPanel Orientation="Vertical" Margin="5" Grid.Row="1">
<TextBox FontStyle="Italic" FontWeight="Light" Text="Browse *.cfg file..." Grid.Column="1" MinHeight="20.5"/>
<TextBox FontStyle="Italic" FontWeight="Light" Text="Browse *.ps file..." Grid.Column="1" MinHeight="20.5"/>
<TextBox FontStyle="Italic" FontWeight="Light" Text="Browse *.pic file..." Grid.Column="1" MinHeight="20.5"/>
<TextBox FontStyle="Italic" FontWeight="Light" Text="Browse Model mapping file..." Grid.Column="1" MinHeight="20.5"/>
<TextBox FontStyle="Italic" FontWeight="Light" Text="Browse Parameter mapping file..." Grid.Column="1" MinHeight="20.5"/>
</StackPanel>
<StackPanel Orientation="Vertical" Margin="5" Grid.Row="2">
<Button Content="Browse..." Grid.Column="2"/>
<Button Content="Browse..." Grid.Column="2"/>
<Button Content="Browse..." Grid.Column="2"/>
<Button Content="Browse..." Grid.Column="2"/>
<Button Content="Browse..." Grid.Column="2"/>
</StackPanel>
</StackPanel>
</DockPanel>
<DockPanel Grid.Column="1" Grid.Row="0">
<igDP:XamDataGrid x:Name="ItemsSource" DataContext="{Binding Source={StaticResource dataContext}, Path=ItemsSource, Mode=TwoWay}" Grid.Row="0" Margin="10" AutoFit="true">
<igDP:XamDataGrid.ViewSettings>
<igDP:GridViewSettings/>
</igDP:XamDataGrid.ViewSettings>
<igDP:XamDataGrid.FieldSettings>
<igDP:FieldSettings LabelTextAlignment="Left" AllowRecordFiltering="true" FilterOperandUIType="ExcelStyle" FilterStringComparisonType="CaseInsensitive" FilterOperatorDefaultValue="Contains"
LabelClickAction="SortByOneFieldOnlyTriState" SortComparisonType="Default"/>
</igDP:XamDataGrid.FieldSettings>
<igDP:XamDataGrid.FieldLayoutSettings>
<igDP:FieldLayoutSettings DataErrorDisplayMode="ErrorIconAndHighlight" SupportDataErrorInfo="RecordsAndCells" SelectionTypeRecord ="Single"
AutoGenerateFields="False" FilterUIType="FilterRecord"/>
</igDP:XamDataGrid.FieldLayoutSettings>
<igDP:XamDataGrid.FieldLayouts>
<igDP:FieldLayout>
<igDP:FieldLayout.Fields>
<igDP:Field Name="IsSelected" Label="Select" HorizontalContentAlignment="Left" Width="Auto" VerticalContentAlignment="Center">
<igDP:Field.Settings>
<igDP:FieldSettings DataItemUpdateTrigger="OnCellValueChange">
<igDP:FieldSettings.LabelPresenterStyle>
<Style TargetType="{x:Type igDP:LabelPresenter}">
<Setter Property="ContentTemplate">
<Setter.Value>
<DataTemplate>
<CheckBox Checked="CheckBox_Checked" Unchecked="CheckBox_Unchecked" Content="" />
</DataTemplate>
</Setter.Value>
</Setter>
</Style>
</igDP:FieldSettings.LabelPresenterStyle>
</igDP:FieldSettings>
</igDP:Field.Settings>
</igDP:Field>
<igDP:Field Label="Name" Name="Name" AllowEdit="False" HorizontalContentAlignment="Left" Width="Auto">
</igDP:Field>
<igDP:Field Label="Type" Name="Type" AllowEdit="False" HorizontalContentAlignment="Left" Width="*"/>
<igDP:Field Label="Background" Name="Background" AllowEdit="False" HorizontalContentAlignment="Left" Width="Auto"/>
<igDP:Field Label="Width" Name="Width" AllowEdit="False" HorizontalContentAlignment="Right" Width="Auto"/>
<igDP:Field Label="Height" Name="Height" AllowEdit="False" HorizontalContentAlignment="Right" Width="Auto"/>
</igDP:FieldLayout.Fields>
</igDP:FieldLayout>
</igDP:XamDataGrid.FieldLayouts>
</igDP:XamDataGrid>
</DockPanel>
<DockPanel Grid.Column="0" Grid.Row="1" Grid.RowSpan="2">
<StackPanel Orientation="Vertical" DockPanel.Dock="Bottom">
<TextBox Text="Sample Text1"/>
<TextBox Text="Sample Text2"/>
<TextBox Text="Sample Text3"/>
<TextBox Text="Sample Text4"/>
</StackPanel>
</DockPanel>
<!--</StackPanel>-->
</Grid>
</Window>
Xaml后面的页面代码：
namespace UserInterface
{
/// <summary>
/// Interaction logic for MainWindow.xaml
/// </summary>
public partial class MainWindow : Window
{
public MainWindow()
{
InitializeComponent();
//GraphicViewModel obj = new GraphicViewModel();
//ItemsSource.DataSource = obj.ItemsSource;
}
#region INotifyPropertyChanged Members
public event PropertyChangedEventHandler PropertyChanged;
private void NotifyPropertyChanged(string info)
{
if (PropertyChanged != null)
{
PropertyChanged(this, new PropertyChangedEventArgs(info));
}
}
#endregion INotifyPropertyChanged Members
public GraphicViewModel GraphicViewModel
{
get { return this.DataContext as GraphicViewModel; }
set
{
this.DataContext = value;
if (this.DataContext != null)
NotifyPropertyChanged("GraphicViewModel");
}
}
private void CheckBox_Checked(object sender, RoutedEventArgs e)
{
}
private void CheckBox_Unchecked(object sender, RoutedEventArgs e)
{
}
}
}
型号Class:
namespace UserInterface.Model
{
public class GraphicsModel : INotifyPropertyChanged
{
public event PropertyChangedEventHandler PropertyChanged;
protected virtual void NotifyOfPropertyChange(string property)
{
if (PropertyChanged != null)
PropertyChanged(this, new PropertyChangedEventArgs(property));
}
private bool _isSelected;
public bool IsSelected
{
get { return _isSelected; }
set
{
if (_isSelected == value) return;
_isSelected = value;
NotifyOfPropertyChange("IsSelected");
}
}
private string _name = string.Empty;
public string Name
{
get { return _name; }
set
{
if (_name != value)
_name = value;
NotifyOfPropertyChange("Name");
}
}
private string _type = string.Empty;
public string Type
{
get { return _type; }
set
{
if (_type != value)
_type = value;
NotifyOfPropertyChange("Type");
}
}
private string _width = string.Empty;
public string Width
{
get { return _width; }
set
{
if (_width != value)
_width = value;
NotifyOfPropertyChange("Width");
}
}
private string _height = string.Empty;
public string Height
{
get { return _height; }
set
{
if (_height != value)
_height = value;
NotifyOfPropertyChange("Height");
}
}
}
}
ViewModel class:
namespace UserInterface.ViewModel
{
public class GraphicViewModel : INotifyPropertyChanged
{
public event PropertyChangedEventHandler PropertyChanged;
protected virtual void NotifyOfPropertyChange(string property)
{
if (PropertyChanged != null)
PropertyChanged(this, new PropertyChangedEventArgs(property));
}
private ObservableCollection<GraphicsModel> _itemsSource = new ObservableCollection<GraphicsModel>();
// MainWindow _view = null;
public ObservableCollection<GraphicsModel> ItemsSource
{
get { return _itemsSource; }
set
{
if (_itemsSource == value) return;
_itemsSource = value;
NotifyOfPropertyChange("ItemsSource");
}
}
public GraphicViewModel()
{
//_view = view;
_itemsSource = new ObservableCollection<GraphicsModel>() { new GraphicsModel() { Name = "sdasdad", Type = "Model", IsSelected = false, Height = "1000", Width = "1370" } ,
new GraphicsModel() { Name = "sdsa", Type = "Model", IsSelected = false, Height = "1000", Width = "1370" } ,new GraphicsModel() { Name = "sdasdad", Type = "Model", IsSelected = false, Height = "1000", Width = "1370" } ,new GraphicsModel() { Name = "asas", Type = "Model", IsSelected = false, Height = "1000", Width = "1370" } ,new GraphicsModel() { Name = "rewwe", Type = "Model", IsSelected = false, Height = "1000", Width = "1370" } ,};
//view.GraphicViewModel = this;
}
}
}
写的时候
<Window.Resources>
<dc:GraphicViewModel x:Key="dataContext"/>
</Window.Resources>
你说的是"create a property of type GraphicViewModel and name it dataContext"。这几乎与在代码隐藏中做这样的事情完全一样：
private GraphicViewModel dataContext = new GraphicViewModel();
当你写
<igDP:XamDataGrid DataContext="{Binding Source={StaticResource dataContext}, Path=ItemsSource, Mode=TwoWay}" .. />
你说的是"bind the igDP:XamDataGrid.DataContext property to dataContext.ItemsSource"。
现在，为什么网格无法加载，.DataContext 属性 实际上没有做任何事情。它只是位于控件后面的数据的持有者。所以如果你要写
<igDP:XamDataGrid ItemsSource="{Binding MyProperty}" />
就是告诉WPF"set XamDataGrid.ItemsSource property equal to XamDataGrid.DataContext.MyProperty"。
由于在上面的代码中您将 DataContext 设置为 dataContext.ItemsSource，它会尝试将值设置为 dataContext.ItemsSource.MyProperty（当然不存在）。
你真正需要的是
<igDP:XamDataGrid ItemsSource="{Binding Source={StaticResource dataContext}, Path=ItemsSource}" .. />
这会将网格的 .ItemsSource 属性（这是它构建数据行的 属性）绑定到在 <Window.Resources> 中创建的名为 "dataContext"，以及那个名为 ItemsSource.
的对象上的 属性
这里的第二个问题是您的代码中似乎有多个 ViewModel 副本。我个人建议永远不要像为 GraphicViewModel 那样在 XAML 中创建对象。相反，我会推荐这样的东西：
public MainWindow()
{
InitializeComponent();
this.DataContext = new GraphicViewModel();
}
现在应该注意，这会创建一个新的 GraphicViewModel 实例，但不会将其存储在任何地方。如果您想在其他代码隐藏中访问此对象而不将 this.DataContext 强制转换为 GraphicViewModel，那么您应该将值存储在某处。
设置 Window.DataContext 后，无需为绑定指定自定义 Source 属性 即可编写绑定。
<igDP:XamDataGrid ItemsSource="{Binding ItemsSource}" .. />
这将起作用，因为 WPF 控件默认情况下会从其父级查找 DataContext（如果未专门设置的话）。因此，在这种情况下，XamDataGrid 的 .DataContext 属性 为空，因此它将在可视化树中向上移动，寻找带有 DataContext 的内容，直到遇到您在GraphicViewModel 的新实例的构造函数。
对于希望了解 DataContext 属性 的人，我通常将他们发送到 this SO answer 以避免必须一直重新键入相同的内容。如果您仍在努力了解 DataContext 是什么或如何使用它，我建议您阅读它。
此外，依赖注入是不同的东西，根本不会在这里使用。
非常感谢@Rachel、@Daniel Filipov 和@quetzalcoatl，我的代码现在可以运行了。在以下文件中完成的更改：
MainWindow.xaml.cs
public MainWindow()
{
InitializeComponent();
ItemsSource.DataContext= new GraphicViewModel();
}
MainWindow.xaml:
<igDP:XamDataGrid x:Name="ItemsSource" DataSource="{Binding ItemsSource, Mode=TwoWay}" .../>
我有一个 WPF XAML 页面，有 3 个部分，由 DockPanel 分隔。一个面板包含一个要与集合绑定的 INFRAGITICS XamDataGrid 控件。
- 我想以纯 MVVM 方式使用 DataContext/DataSource 属性 绑定 XamDataGrid 控件。
- 此外，很高兴了解绑定是否通过依赖项注入完成。
我尝试了不同的方法，但没有成功。我在下面粘贴了我的代码以供参考。请帮忙。
XAML 页数：
<Window x:Class="UserInterface.MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
xmlns:local="clr-namespace:UserInterface"
xmlns:igDP="clr-namespace:Infragistics.Windows.DataPresenter;assembly=InfragisticsWPF.DataPresenter"
xmlns:igEditors="clr-namespace:Infragistics.Windows.Editors;assembly=InfragisticsWPF.Editors"
xmlns:sys="clr-namespace:System;assembly=mscorlib"
xmlns:dc ="clr-namespace:UserInterface.ViewModel"
xmlns:diag="clr-namespace:System.Diagnostics;assembly=WindowsBase"
mc:Ignorable="d"
Title="MainWindow">
<Window.Resources>
<dc:GraphicViewModel x:Key="dataContext"/>
</Window.Resources>
<Grid>
<Grid.RowDefinitions>
<RowDefinition Height=".5*"/>
<RowDefinition Height=".5*"/>
</Grid.RowDefinitions>
<Grid.ColumnDefinitions>
<ColumnDefinition Width=".5*"/>
<ColumnDefinition Width=".5*"/>
</Grid.ColumnDefinitions>
<DockPanel Grid.Column="0" Grid.Row="0">
<Grid>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="Auto"/>
<ColumnDefinition Width="Auto"/>
<ColumnDefinition Width="Auto"/>
</Grid.ColumnDefinitions>
<Grid.RowDefinitions>
<RowDefinition Height="Auto"/>
<RowDefinition Height="Auto"/>
<RowDefinition Height="Auto"/>
<RowDefinition Height="Auto"/>
<RowDefinition Height="Auto"/>
</Grid.RowDefinitions>
</Grid>
<!--<StackPanel Orientation="Vertical" DockPanel.Dock="Top">
<StackPanel Orientation="Horizontal" Margin="5" Grid.Row="0">
<DockPanel>
<TextBlock Text="*.cfg File" Grid.Column="0" DockPanel.Dock="Left"/>
<Button Content="Browse..." Grid.Column="2" DockPanel.Dock="Right"/>
<TextBox FontStyle="Italic" FontWeight="Light" Text="Browse *.cfg file..." Grid.Column="1" DockPanel.Dock="Right"/>
</DockPanel>
</StackPanel>
<StackPanel Orientation="Horizontal" Margin="5" Grid.Row="1">
<TextBlock Text="*.ps File " Grid.Column="0"/>
<TextBox FontStyle="Italic" FontWeight="Light" Text="Browse *.ps file..." Grid.Column="1"/>
<Button Content="Browse..." Grid.Column="2"/>
</StackPanel>
<StackPanel Orientation="Horizontal" Margin="5" Grid.Row="2">
<TextBlock Text="*.pic File " Grid.Column="0"/>
<TextBox FontStyle="Italic" FontWeight="Light" Text="Browse *.pic file..." Grid.Column="1"/>
<Button Content="Browse..." Grid.Column="2"/>
</StackPanel>
<StackPanel Orientation="Horizontal" Margin="5" Grid.Row="3">
<TextBlock Text="*.xlsx File" Grid.Column="0"/>
<TextBox FontStyle="Italic" FontWeight="Light" Text="Browse *.xlsx file..." Grid.Column="1"/>
<Button Content="Browse..." Grid.Column="2"/>
</StackPanel>
<StackPanel Orientation="Horizontal" Margin="5" Grid.Row="4">
<TextBlock Text="*.xlsx File"/>
<TextBox FontStyle="Italic" FontWeight="Light" Text="Browse *.xlsx file..." Grid.Column="1"/>
<Button Content="Browse..." Grid.Column="2"/>
</StackPanel>
</StackPanel>-->
<StackPanel Orientation="Horizontal">
<StackPanel Orientation="Vertical" Margin="5" Grid.Row="0">
<TextBlock MinHeight="20.5" Text="*.cfg File" Grid.Column="0"/>
<TextBlock MinHeight="20.5" Text="*.ps File " Grid.Column="0"/>
<TextBlock MinHeight="20.5" Text="*.pic File " Grid.Column="0"/>
<TextBlock MinHeight="20.5" Text="*.xlsx File" Grid.Column="0"/>
<TextBlock MinHeight="20.5" Text="*.xlsx File" Grid.Column="0"/>
</StackPanel>
<StackPanel Orientation="Vertical" Margin="5" Grid.Row="1">
<TextBox FontStyle="Italic" FontWeight="Light" Text="Browse *.cfg file..." Grid.Column="1" MinHeight="20.5"/>
<TextBox FontStyle="Italic" FontWeight="Light" Text="Browse *.ps file..." Grid.Column="1" MinHeight="20.5"/>
<TextBox FontStyle="Italic" FontWeight="Light" Text="Browse *.pic file..." Grid.Column="1" MinHeight="20.5"/>
<TextBox FontStyle="Italic" FontWeight="Light" Text="Browse Model mapping file..." Grid.Column="1" MinHeight="20.5"/>
<TextBox FontStyle="Italic" FontWeight="Light" Text="Browse Parameter mapping file..." Grid.Column="1" MinHeight="20.5"/>
</StackPanel>
<StackPanel Orientation="Vertical" Margin="5" Grid.Row="2">
<Button Content="Browse..." Grid.Column="2"/>
<Button Content="Browse..." Grid.Column="2"/>
<Button Content="Browse..." Grid.Column="2"/>
<Button Content="Browse..." Grid.Column="2"/>
<Button Content="Browse..." Grid.Column="2"/>
</StackPanel>
</StackPanel>
</DockPanel>
<DockPanel Grid.Column="1" Grid.Row="0">
<igDP:XamDataGrid x:Name="ItemsSource" DataContext="{Binding Source={StaticResource dataContext}, Path=ItemsSource, Mode=TwoWay}" Grid.Row="0" Margin="10" AutoFit="true">
<igDP:XamDataGrid.ViewSettings>
<igDP:GridViewSettings/>
</igDP:XamDataGrid.ViewSettings>
<igDP:XamDataGrid.FieldSettings>
<igDP:FieldSettings LabelTextAlignment="Left" AllowRecordFiltering="true" FilterOperandUIType="ExcelStyle" FilterStringComparisonType="CaseInsensitive" FilterOperatorDefaultValue="Contains"
LabelClickAction="SortByOneFieldOnlyTriState" SortComparisonType="Default"/>
</igDP:XamDataGrid.FieldSettings>
<igDP:XamDataGrid.FieldLayoutSettings>
<igDP:FieldLayoutSettings DataErrorDisplayMode="ErrorIconAndHighlight" SupportDataErrorInfo="RecordsAndCells" SelectionTypeRecord ="Single"
AutoGenerateFields="False" FilterUIType="FilterRecord"/>
</igDP:XamDataGrid.FieldLayoutSettings>
<igDP:XamDataGrid.FieldLayouts>
<igDP:FieldLayout>
<igDP:FieldLayout.Fields>
<igDP:Field Name="IsSelected" Label="Select" HorizontalContentAlignment="Left" Width="Auto" VerticalContentAlignment="Center">
<igDP:Field.Settings>
<igDP:FieldSettings DataItemUpdateTrigger="OnCellValueChange">
<igDP:FieldSettings.LabelPresenterStyle>
<Style TargetType="{x:Type igDP:LabelPresenter}">
<Setter Property="ContentTemplate">
<Setter.Value>
<DataTemplate>
<CheckBox Checked="CheckBox_Checked" Unchecked="CheckBox_Unchecked" Content="" />
</DataTemplate>
</Setter.Value>
</Setter>
</Style>
</igDP:FieldSettings.LabelPresenterStyle>
</igDP:FieldSettings>
</igDP:Field.Settings>
</igDP:Field>
<igDP:Field Label="Name" Name="Name" AllowEdit="False" HorizontalContentAlignment="Left" Width="Auto">
</igDP:Field>
<igDP:Field Label="Type" Name="Type" AllowEdit="False" HorizontalContentAlignment="Left" Width="*"/>
<igDP:Field Label="Background" Name="Background" AllowEdit="False" HorizontalContentAlignment="Left" Width="Auto"/>
<igDP:Field Label="Width" Name="Width" AllowEdit="False" HorizontalContentAlignment="Right" Width="Auto"/>
<igDP:Field Label="Height" Name="Height" AllowEdit="False" HorizontalContentAlignment="Right" Width="Auto"/>
</igDP:FieldLayout.Fields>
</igDP:FieldLayout>
</igDP:XamDataGrid.FieldLayouts>
</igDP:XamDataGrid>
</DockPanel>
<DockPanel Grid.Column="0" Grid.Row="1" Grid.RowSpan="2">
<StackPanel Orientation="Vertical" DockPanel.Dock="Bottom">
<TextBox Text="Sample Text1"/>
<TextBox Text="Sample Text2"/>
<TextBox Text="Sample Text3"/>
<TextBox Text="Sample Text4"/>
</StackPanel>
</DockPanel>
<!--</StackPanel>-->
</Grid>
</Window>
Xaml后面的页面代码：
namespace UserInterface
{
/// <summary>
/// Interaction logic for MainWindow.xaml
/// </summary>
public partial class MainWindow : Window
{
public MainWindow()
{
InitializeComponent();
//GraphicViewModel obj = new GraphicViewModel();
//ItemsSource.DataSource = obj.ItemsSource;
}
#region INotifyPropertyChanged Members
public event PropertyChangedEventHandler PropertyChanged;
private void NotifyPropertyChanged(string info)
{
if (PropertyChanged != null)
{
PropertyChanged(this, new PropertyChangedEventArgs(info));
}
}
#endregion INotifyPropertyChanged Members
public GraphicViewModel GraphicViewModel
{
get { return this.DataContext as GraphicViewModel; }
set
{
this.DataContext = value;
if (this.DataContext != null)
NotifyPropertyChanged("GraphicViewModel");
}
}
private void CheckBox_Checked(object sender, RoutedEventArgs e)
{
}
private void CheckBox_Unchecked(object sender, RoutedEventArgs e)
{
}
}
}
型号Class:
namespace UserInterface.Model
{
public class GraphicsModel : INotifyPropertyChanged
{
public event PropertyChangedEventHandler PropertyChanged;
protected virtual void NotifyOfPropertyChange(string property)
{
if (PropertyChanged != null)
PropertyChanged(this, new PropertyChangedEventArgs(property));
}
private bool _isSelected;
public bool IsSelected
{
get { return _isSelected; }
set
{
if (_isSelected == value) return;
_isSelected = value;
NotifyOfPropertyChange("IsSelected");
}
}
private string _name = string.Empty;
public string Name
{
get { return _name; }
set
{
if (_name != value)
_name = value;
NotifyOfPropertyChange("Name");
}
}
private string _type = string.Empty;
public string Type
{
get { return _type; }
set
{
if (_type != value)
_type = value;
NotifyOfPropertyChange("Type");
}
}
private string _width = string.Empty;
public string Width
{
get { return _width; }
set
{
if (_width != value)
_width = value;
NotifyOfPropertyChange("Width");
}
}
private string _height = string.Empty;
public string Height
{
get { return _height; }
set
{
if (_height != value)
_height = value;
NotifyOfPropertyChange("Height");
}
}
}
}
ViewModel class:
namespace UserInterface.ViewModel
{
public class GraphicViewModel : INotifyPropertyChanged
{
public event PropertyChangedEventHandler PropertyChanged;
protected virtual void NotifyOfPropertyChange(string property)
{
if (PropertyChanged != null)
PropertyChanged(this, new PropertyChangedEventArgs(property));
}
private ObservableCollection<GraphicsModel> _itemsSource = new ObservableCollection<GraphicsModel>();
// MainWindow _view = null;
public ObservableCollection<GraphicsModel> ItemsSource
{
get { return _itemsSource; }
set
{
if (_itemsSource == value) return;
_itemsSource = value;
NotifyOfPropertyChange("ItemsSource");
}
}
public GraphicViewModel()
{
//_view = view;
_itemsSource = new ObservableCollection<GraphicsModel>() { new GraphicsModel() { Name = "sdasdad", Type = "Model", IsSelected = false, Height = "1000", Width = "1370" } ,
new GraphicsModel() { Name = "sdsa", Type = "Model", IsSelected = false, Height = "1000", Width = "1370" } ,new GraphicsModel() { Name = "sdasdad", Type = "Model", IsSelected = false, Height = "1000", Width = "1370" } ,new GraphicsModel() { Name = "asas", Type = "Model", IsSelected = false, Height = "1000", Width = "1370" } ,new GraphicsModel() { Name = "rewwe", Type = "Model", IsSelected = false, Height = "1000", Width = "1370" } ,};
//view.GraphicViewModel = this;
}
}
}
写的时候
<Window.Resources>
<dc:GraphicViewModel x:Key="dataContext"/>
</Window.Resources>
你说的是"create a property of type GraphicViewModel and name it dataContext"。这几乎与在代码隐藏中做这样的事情完全一样：
private GraphicViewModel dataContext = new GraphicViewModel();
当你写
<igDP:XamDataGrid DataContext="{Binding Source={StaticResource dataContext}, Path=ItemsSource, Mode=TwoWay}" .. />
你说的是"bind the igDP:XamDataGrid.DataContext property to dataContext.ItemsSource"。
现在，为什么网格无法加载，.DataContext 属性 实际上没有做任何事情。它只是位于控件后面的数据的持有者。所以如果你要写
<igDP:XamDataGrid ItemsSource="{Binding MyProperty}" />
就是告诉WPF"set XamDataGrid.ItemsSource property equal to XamDataGrid.DataContext.MyProperty"。
由于在上面的代码中您将 DataContext 设置为 dataContext.ItemsSource，它会尝试将值设置为 dataContext.ItemsSource.MyProperty（当然不存在）。
你真正需要的是
<igDP:XamDataGrid ItemsSource="{Binding Source={StaticResource dataContext}, Path=ItemsSource}" .. />
这会将网格的 .ItemsSource 属性（这是它构建数据行的 属性）绑定到在 <Window.Resources> 中创建的名为 "dataContext"，以及那个名为 ItemsSource.
这里的第二个问题是您的代码中似乎有多个 ViewModel 副本。我个人建议永远不要像为 GraphicViewModel 那样在 XAML 中创建对象。相反，我会推荐这样的东西：
public MainWindow()
{
InitializeComponent();
this.DataContext = new GraphicViewModel();
}
现在应该注意，这会创建一个新的 GraphicViewModel 实例，但不会将其存储在任何地方。如果您想在其他代码隐藏中访问此对象而不将 this.DataContext 强制转换为 GraphicViewModel，那么您应该将值存储在某处。
设置 Window.DataContext 后，无需为绑定指定自定义 Source 属性 即可编写绑定。
<igDP:XamDataGrid ItemsSource="{Binding ItemsSource}" .. />
这将起作用，因为 WPF 控件默认情况下会从其父级查找 DataContext（如果未专门设置的话）。因此，在这种情况下，XamDataGrid 的 .DataContext 属性 为空，因此它将在可视化树中向上移动，寻找带有 DataContext 的内容，直到遇到您在GraphicViewModel 的新实例的构造函数。
对于希望了解 DataContext 属性 的人，我通常将他们发送到 this SO answer 以避免必须一直重新键入相同的内容。如果您仍在努力了解 DataContext 是什么或如何使用它，我建议您阅读它。
此外，依赖注入是不同的东西，根本不会在这里使用。
非常感谢@Rachel、@Daniel Filipov 和@quetzalcoatl，我的代码现在可以运行了。在以下文件中完成的更改：
MainWindow.xaml.cs
public MainWindow()
{
InitializeComponent();
ItemsSource.DataContext= new GraphicViewModel();
}
MainWindow.xaml:
<igDP:XamDataGrid x:Name="ItemsSource" DataSource="{Binding ItemsSource, Mode=TwoWay}" .../>