我有一個使用RadDataFilter的Silverlight應用程序。此RadDataFilter使用自定義對象的列表作爲testComboBox的數據源。當用戶點擊「測試」按鈕時,過濾器值始終設置爲「未設置」。例如,如果我使用下面的代碼,我總是會看到「Priority IsEqualTo」。但是,如果我使用字符串值列表作爲testComboBox的數據源,則一切正常。這裏是我的代碼:在RadDataFilter中使用對象集合作爲過濾器
<UserControl.Resources>
<DataTemplate x:Key="priorityTemplate">
<telerik:RadComboBox x:Name="testComboBox" MinWidth="100" DisplayMemberPath="Title" SelectedValue="{Binding Path=Value, Mode=TwoWay, FallbackValue=null}" SelectionChanged="testComboBox_SelectionChanged">
<telerik:RadComboBox.ItemsPanel>
<ItemsPanelTemplate>
<VirtualizingStackPanel MinWidth="320" />
</ItemsPanelTemplate>
</telerik:RadComboBox.ItemsPanel>
</telerik:RadComboBox>
</DataTemplate>
<DataTemplate x:Key="locationTemplate"></DataTemplate>
<DataTemplate x:Key="typeTemplate"></DataTemplate>
<code:MyEditorTemplateSelector x:Key="myEditorTemplate">
<code:MyEditorTemplateSelector.EditorTemplateRules>
<code:MyEditorTemplateRule PropertyName="Priority" DataTemplate="{StaticResource priorityTemplate}" />
<code:MyEditorTemplateRule PropertyName="Location" DataTemplate="{StaticResource locationTemplate}" />
<code:MyEditorTemplateRule PropertyName="TypeName" DataTemplate="{StaticResource typeTemplate}" />
</code:MyEditorTemplateSelector.EditorTemplateRules>
</code:MyEditorTemplateSelector>
</UserControl.Resources>
<Grid x:Name="LayoutRoot" Background="White">
<Grid.RowDefinitions>
<RowDefinition Height="Auto" />
<RowDefinition />
</Grid.RowDefinitions>
<Button Content="Test" Height="30" Width="90" Margin="0,0,0,8" HorizontalAlignment="Left" Click="Button_Click" />
<telerik:RadDataFilter x:Name="filter" Grid.Row="1" EditorCreated="filter_EditorCreated" AutoGenerateItemPropertyDefinitions="False" EditorTemplateSelector="{StaticResource myEditorTemplate}" Loaded="filter_Loaded" />
</Grid>
以下是有關部分的我的代碼隱藏:
private void filter_Loaded(object sender, RoutedEventArgs e)
{
ItemPropertyDefinition priorityDefinition = new ItemPropertyDefinition("Priority", typeof(string), "Priority");
filter.ItemPropertyDefinitions.Add(priorityDefinition);
}
private void Button_Click(object sender, RoutedEventArgs e)
{
string rules = string.Empty;
foreach (FilterDescriptor description in filter.FilterDescriptors)
rules += description.ToString() + "\n";
MessageBox.Show(rules);
}
private void filter_EditorCreated(object sender, EditorCreatedEventArgs e)
{
switch (e.ItemPropertyDefinition.PropertyName)
{
case "Priority":
// This works
List<string> options = new List<string>() { "High", "Low" };
//(RadComboBox)(e.Editor)).ItemsSource = options;
// This doesn't
List<Priority> priorities = new List<Priority>();
priorities.Add(new Priority("High", true));
priorities.Add(new Priority("Low", false));
((RadComboBox)(e.Editor)).ItemsSource = priorities;
break;
}
}
這裏是Priority.cs定義:
public class Priority
{
public string Title { get; set; }
public bool Val { get; set; }
public Priority(string title, bool val)
{
this.Title = title;
this.Val = val;
}
}
最後,在這裏是模板選擇器代碼:
public class MyEditorTemplateSelector : DataTemplateSelector
{
private List<MyEditorTemplateRule> templateRules = new List<MyEditorTemplateRule>();
public List<MyEditorTemplateRule> EditorTemplateRules
{
get { return templateRules; }
}
public override DataTemplate SelectTemplate(object item, DependencyObject container)
{
ItemPropertyDefinition propertyDefinition = (ItemPropertyDefinition)item;
foreach (MyEditorTemplateRule rule in templateRules)
{
// Select the appropriate template for each property.
if (rule.PropertyName == propertyDefinition.PropertyName)
{
return rule.DataTemplate;
}
}
return base.SelectTemplate(item, container);
}
}
public class MyEditorTemplateRule
{
private string propertyName;
public string PropertyName
{
get
{
return this.propertyName;
}
set
{
this.propertyName = value;
}
}
private DataTemplate dataTemplate;
public DataTemplate DataTemplate
{
get
{
return this.dataTemplate;
}
set
{
this.dataTemplate = value;
}
}
}
如何在編輯器模板中使用自定義類型作爲過濾器選項?
謝謝!