我在列表视图中绑定组合框的数据时遇到了一个问题。我有两个类:
该事务具有衬底的属性,并且该事务被保存在数据库中。在程序开始时,我希望将所有事务加载为列表,并在ListView中显示它们。每种基材的可能性都应显示在选择实际基材的组合框中。
我试过像这样的XAML
<ListView.View>
<GridView>
<GridViewColumn Header="Menge">
<GridViewColumn.CellTemplate>
<DataTemplate>
<TextBox Text="{Binding Path=Amount}" />
</DataTemplate>
</GridViewColumn.CellTemplate>
</GridViewColumn>
<GridViewColumn Header="Substrate">
<GridViewColumn.CellTemplate>
<DataTemplate>
<ComboBox
ItemsSource="{Binding ElementName=InternTransaction, Path=SubstrateList}"
DisplayMemberPath="Description"
SelectedValuePath="SubstrateID"
SelectedItem="{Binding Path=Substrate.SubstrateID}">
</ComboBox>
</DataTemplate>
</GridViewColumn.CellTemplate>
</GridViewColumn>
</GridView>
</ListView.View>
代码隐藏
public partial class UCInternTransaction : UserControl
{
#region Attribute
private BsCBTTransactionController mTransactionController;
private ObservableCollection<BsCBTSubstrate> mSubstrateList;
#endregion
public UCInternTransaction()
{
InitializeComponent();
//Load Transactions
this.mTransactionController = WpfBioGas.Core.BsCAppFactory.getInstance().getCBTTransactionController();
this.mTransactionController.loadTransactions();
this.DataContext = this.mTransactionController.TransactionList;
loadData();
}
private void loadData()
{
//Load Substrate and bind to CBSubstrate
this.mSubstrateList = new ObservableCollection<BsCBTSubstrate>();
foreach (BsCBTSubstrate sub in WpfBioGas.Core.BsCAppFactory.getInstance().getBTFacade().BsBTSubstrate.loadAll())
{
this.mSubstrateList.Add(sub);
}
}
public ObservableCollection<BsCBTSubstrate> SubstrateList
{
get { return this.mSubstrateList; }
}
}
问题是列表的所有条目都显示在列表视图中,并且对于每一行,基底的所有可能性都在组合框中。但仅对于Listview的第一行,选择实际的衬底。
发布于 2010-02-09 03:05:10
您的ComboBox应该在SelectedValue而不是SelectedItem上使用绑定。
仅仅基于您在帖子中显示的代码片段提供修复有点困难,但这里有一个使用两个内联-ready数据源的kaxaml-ready示例:
<Page
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">
<Page.Resources>
<XmlDataProvider x:Key="CharacterData">
<x:XData>
<Data xmlns="">
<Character First="Bart" Last="Simpson" Gender="M"/>
<Character First="Homer" Last="Simpson" Gender="M"/>
<Character First="Lisa" Last="Simpson" Gender="F"/>
<Character First="Maggie" Last="Simpson" Gender="F"/>
<Character First="Marge" Last="Simpson" Gender="F"/>
</Data>
</x:XData>
</XmlDataProvider>
<XmlDataProvider x:Key="GenderData">
<x:XData>
<Data xmlns="">
<Gender ID="F" Description="Female" />
<Gender ID="M" Description="Male" />
</Data>
</x:XData>
</XmlDataProvider>
</Page.Resources>
<ListView ItemsSource="{Binding Source={StaticResource CharacterData}, XPath=Data/Character}">
<ListView.View>
<GridView>
<GridViewColumn Header="Last Name"
DisplayMemberBinding="{Binding XPath=@First}" />
<GridViewColumn Header="Gender">
<GridViewColumn.CellTemplate>
<DataTemplate>
<ComboBox Width="75" SelectedValue="{Binding XPath=@Gender}"
DisplayMemberPath="@Description" SelectedValuePath="@ID"
ItemsSource="{Binding Source={StaticResource GenderData}, XPath=Data/Gender}" />
</DataTemplate>
</GridViewColumn.CellTemplate>
</GridViewColumn>
</GridView>
</ListView.View>
</ListView>
</Page>
https://stackoverflow.com/questions/2221745
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