列表视图项的多重绑定问题
本文关键字:绑定 问题 视图 列表 | 更新日期: 2023-09-27 17:55:48
我有这块 XAML:
<Style x:Key="HideShowStyle" TargetType="{x:Type ListViewItem}">
<Style.Resources>
<localConverters:ShowHideConverter x:Key="showHideConverter" />
</Style.Resources>
<Style.Triggers>
<DataTrigger Value="true">
<DataTrigger.Binding>
<MultiBinding Converter="{StaticResource showHideConverter}">
<Binding Path="EndingDate" />
<Binding ElementName="cmbType" Path="SelectedValue" />
<Binding ElementName="searchBox" Path="Text" />
<Binding Path="Client" />
</MultiBinding>
</DataTrigger.Binding>
<Setter Property="Visibility" Value="Visible" />
</DataTrigger>
<DataTrigger Value="false">
(...)
</DataTrigger>
</Style.Triggers>
</Style>
我已经在 C# 代码中转换了:
var triggerStyle = new Style();
var trueTrigger = new DataTrigger();
var multiBinding = new MultiBinding();
var converter = new ShowHideConverter();
multiBinding.Converter = converter;
var binding1 = new Binding("SelectedItem");
binding1.Source = cmbType;
multiBinding.Bindings.Add(binding1);
var binding2 = new Binding("EndingDate");
binding2.Source = reportList.ItemsSource;
multiBinding.Bindings.Add(binding2);
var binding3 = new Binding("Text");
binding3.Source = searchBox;
multiBinding.Bindings.Add(binding3);
var binding4 = new Binding("Client");
binding4.Source = reportList.ItemsSource;
multiBinding.Bindings.Add(binding4);
trueTrigger.Value = true;
trueTrigger.Binding = multiBinding;
trueTrigger.Setters.Add(new Setter(VisibilityProperty, Visibility.Visible));
var falseTrigger = new DataTrigger();
falseTrigger.Value = false;
falseTrigger.Binding = multiBinding;
falseTrigger.Setters.Add(new Setter(VisibilityProperty, Visibility.Collapsed));
triggerStyle.Triggers.Add(trueTrigger);
triggerStyle.Triggers.Add(falseTrigger);
reportList.ItemContainerStyle = triggerStyle;
现在,执行代码,listview 将数据正确传递到转换器中,这会对其进行分析并根据条件返回 true 或 false。问题是,"Client"绑定不会滚动行,但它仍然停留在第一列的值上,而 XAML 硬编码样式工作正常。
我不知道该怎么做才能让它工作。
只需删除此行:
binding4.Source = reportList.ItemsSource;
绑定的源将是列表视图项(即每行的数据项)的数据上下文。