C# 动态选项卡页上DataGrid的绑定属性(宽度/排序)
我创建了一个小wpf测试项目来演示我的问题。此项目包含一个wpf窗口。此窗口仅包含一个C# 动态选项卡页上DataGrid的绑定属性(宽度/排序),c#,wpf,xaml,datagrid,tabcontrol,C#,Wpf,Xaml,Datagrid,Tabcontrol,我创建了一个小wpf测试项目来演示我的问题。此项目包含一个wpf窗口。此窗口仅包含一个选项卡控件。此TabControl的页面是从绑定的ItemSource动态创建的 我的XAML: <Window x:Name="window" x:Class="TestWpf.MainWindow" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.micr
选项卡控件
。此TabControl
的页面是从绑定的ItemSource
动态创建的
我的XAML:
<Window x:Name="window" x:Class="TestWpf.MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:vm="clr-namespace:TestWpf"
Title="MainWindow" Height="350" Width="525">
<TabControl x:Name="tabControl" BorderThickness="0" ItemsSource ="{Binding MediaLists, ElementName=window, NotifyOnSourceUpdated=True}">
<TabControl.ItemTemplate>
<DataTemplate DataType="{x:Type vm:MediaList}">
<TextBlock Padding="2" Text="{Binding MediaTypeName}" HorizontalAlignment="Center" VerticalAlignment="Center"/>
</DataTemplate>
</TabControl.ItemTemplate>
<TabControl.ContentTemplate>
<DataTemplate x:Name="contentTemplate" DataType="{x:Type vm:MediaList}">
<DataGrid x:Name="dgMediaList" ItemsSource="{Binding Medias, BindsDirectlyToSource=True}" DockPanel.Dock="Top" AutoGenerateColumns="False" HorizontalGridLinesBrush="{DynamicResource {x:Static SystemColors.ActiveBorderBrushKey}}" VerticalGridLinesBrush="{DynamicResource {x:Static SystemColors.ActiveBorderBrushKey}}">
<DataGrid.Columns>
<DataGridTextColumn x:Name="clmAuthor" Header="Author" Binding="{Binding Author}" IsReadOnly="True" CanUserReorder="False" />
<DataGridTextColumn x:Name="clmTitle" Header="Title" Binding="{Binding Title}" IsReadOnly="True" CanUserReorder="False" />
</DataGrid.Columns>
</DataGrid>
</DataTemplate>
</TabControl.ContentTemplate>
</TabControl>
</Window>
和媒体
如下:
public partial class MainWindow : Window
{
private readonly ObservableCollection<MediaList> m_MediaLists = new ObservableCollection<MediaList>();
public ObservableCollection<MediaList> MediaLists { get { return m_MediaLists; } }
public MainWindow()
{
InitializeComponent();
MediaList cdList = new MediaList("CDs");
cdList.Medias.Add(new Media("AuthorCdA", "TitleCdA1"));
cdList.Medias.Add(new Media("AuthorCdA", "TitleCdA2"));
cdList.Medias.Add(new Media("AuthorCdB", "TitleCdB1"));
cdList.Medias.Add(new Media("AuthorCdB", "TitleCdB2"));
MediaList bookList = new MediaList("Books");
bookList.Medias.Add(new Media("AuthorBookA", "TitleBookA1"));
bookList.Medias.Add(new Media("AuthorBookA", "TitleBookA2"));
bookList.Medias.Add(new Media("AuthorBookB", "TitleBookB1"));
bookList.Medias.Add(new Media("AuthorBookB", "TitleBookB2"));
m_MediaLists.Add(cdList);
m_MediaLists.Add(bookList);
}
}
public class Media
{
public string Author { get; private set; }
public string Title { get; private set; }
public Media(string author, string title)
{
Author = author;
Title = title;
}
}
这一切都很好,正如你在这里看到的:
现在的问题是:如何为每个TabPage
保存DataGrid
的布局?当我在TabPage
之间切换时,所有页面的列宽保持不变,但排序总是完全丢失
我想绑定DataGrid
的列宽以及多列排序设置,这些设置由用户在MediaList
实例的成员中更改
因此,为了简短地回答这个问题,让我们集中讨论列宽。我将成员添加到MediaList
类中:
private DataGridLength m_WidthAuthor = DataGridLength.SizeToCells;
private DataGridLength m_WidthTitle = DataGridLength.SizeToCells;
public DataGridLength WidthAuthor
{
get { return m_WidthAuthor; }
set
{
if (value == m_WidthAuthor) return;
m_WidthAuthor = value;
OnPropertyChanged("WidthAuthor");
}
}
public DataGridLength WidthTitle
{
get { return m_WidthTitle; }
set
{
if (value == m_WidthTitle) return;
m_WidthTitle = value;
OnPropertyChanged("WidthTitle");
}
}
并尝试在xaml中设置绑定:
<DataGridTextColumn x:Name="clmAuthor" ... Width="{Binding WidthAuthor, Mode=TwoWay, NotifyOnSourceUpdated=True, UpdateSourceTrigger=PropertyChanged}" />
<DataGridTextColumn x:Name="clmTitle" ... Width="{Binding WidthTitle, Mode=TwoWay, NotifyOnSourceUpdated=True, UpdateSourceTrigger=PropertyChanged}" />
因此,如果有人能告诉我如何为每个TabPage
保存那些DataGrid
属性,我将非常高兴。这个问题的焦点是宽度。排序可能是一个新问题的主题(请注意,绑定列的SortDirection
可能不适用于多列排序)
EDIT:我已将diag:PresentationTraceSources.TraceLevel=High
添加到Binding
表达式的一列Width
中,并在调试输出中找到以下消息:
System.Windows.Data Warning: 62 : BindingExpression (hash=18270086): Attach to System.Windows.Controls.DataGridTextColumn.Width (hash=37671782)
System.Windows.Data Warning: 64 : BindingExpression (hash=18270086): Use Framework mentor <null>
System.Windows.Data Warning: 67 : BindingExpression (hash=18270086): Resolving source
System.Windows.Data Warning: 69 : BindingExpression (hash=18270086): Framework mentor not found
System.Windows.Data Warning: 65 : BindingExpression (hash=18270086): Resolve source deferred
System.Windows.Data警告:62:BindingExpression(hash=18270086):附加到System.Windows.Controls.DataGridTextColumn.Width(hash=37671782)
System.Windows.Data警告:64:BindingExpression(哈希=18270086):使用Framework mentor
System.Windows.Data警告:67:BindingExpression(哈希=18270086):正在解析源
System.Windows.Data警告:69:BindingExpression(哈希=18270086):找不到Framework mentor
System.Windows.Data警告:65:BindingExpression(哈希=18270086):解析源已延迟
我对wpf太陌生了,无法理解什么是
框架导师
,如果这真的应该是null
,我在的帮助下解决了它。不幸的是,我对wpf的了解仍然很低,以至于我无法解释(以及上述文章的作者)幕后发生了什么,以及这是否真的是一个好的解决方案
以下是我所做的:
实现从“Freezable”继承的“BindingProxy”`
问题之一是,DataContext
没有继承到DataGridTextColumn
。因此,目的是将其存储在代理中
public class BindingProxy : Freezable
{
protected override Freezable CreateInstanceCore()
{
return new BindingProxy();
}
public object Data
{
get { return GetValue(DATA_PROPERTY); }
set { SetValue(DATA_PROPERTY, value); }
}
// Using a DependencyProperty as the backing store for Data. This enables animation, styling, binding, etc...
public static readonly DependencyProperty DATA_PROPERTY =
DependencyProperty.Register("Data", typeof(object), typeof(BindingProxy), new UIPropertyMetadata(null));
}
将“BindingProxy”的实例声明为“DataGrid”中的本地资源`
我在xaml中将此本地资源添加到我的DataGrid
:
<DataGrid.Resources>
<vm:BindingProxy x:Key="proxy" Data="{Binding}" />
</DataGrid.Resources>
瞧,它真管用
我将继续研究如何对多列排序执行此操作。如果我找不到解决办法,我会提出一个新问题。如果在接下来的几天里没有人提出解决方案,我会接受我自己的答案
更新:我解决了多列排序问题
public class BindingProxy : Freezable
{
protected override Freezable CreateInstanceCore()
{
return new BindingProxy();
}
public object Data
{
get { return GetValue(DATA_PROPERTY); }
set { SetValue(DATA_PROPERTY, value); }
}
// Using a DependencyProperty as the backing store for Data. This enables animation, styling, binding, etc...
public static readonly DependencyProperty DATA_PROPERTY =
DependencyProperty.Register("Data", typeof(object), typeof(BindingProxy), new UIPropertyMetadata(null));
}
<DataGrid.Resources>
<vm:BindingProxy x:Key="proxy" Data="{Binding}" />
</DataGrid.Resources>
Width="{Binding Data.WidthAuthor, Source={StaticResource proxy}....