Wpf 与项目模板的组合框数据绑定
我正在尝试创建一个包含魔兽世界物品列表的wpf组合框。我正在为组合框使用项目模板，以便在组合框下拉列表中显示项目图标和项目名称。它按原样工作，我可以开始键入项目名称，弹出窗口中的项目列表将自动过滤 问题是，当我单击某个项目时，我希望该项目的名称显示在组合框文本区域中。相反，我得到的是一个非常简短的ItemDisplayModel.ToString（），然后是一个空字符串 ItemDisplayModel.ToString（）是我从列表中选择的ItemDisplayModel类型。这是有意义的，因为combobox控件ItemsSource属性包含ItemDisplayModel类型的数组 但在我的AuctionHouseFilterItemModel.Value属性中，我正在检测值是否已更改，如果已更改，则重建要显示在组合框中的项目列表。因此，因为当我单击弹出列表中的项目时，组合框中的文本被更改为ItemDisplayModel.ToString（），所以它再次重建项目列表，但这次没有匹配，因为ItemDisplayModel.ToString（）与任何已知的项目名称都不匹配 我所要做的只是在单击弹出列表中的项目时，我希望ItemDisplayModel.Name映射到AuctionHouseFilterItemModel.Value属性，并使combobox文本区域显示AuctionHouseFilterItemModel.Value 这有意义吗？我尝试了许多不同的方法，但我不知所措。环顾网络也没有给我答案。我相信这是一个简单的解决办法，但我无法找到解决办法 这是我的XAML控件Wpf 与项目模板的组合框数据绑定,wpf,combobox,Wpf,Combobox,我正在尝试创建一个包含魔兽世界物品列表的wpf组合框。我正在为组合框使用项目模板，以便在组合框下拉列表中显示项目图标和项目名称。它按原样工作，我可以开始键入项目名称，弹出窗口中的项目列表将自动过滤 问题是，当我单击某个项目时，我希望该项目的名称显示在组合框文本区域中。相反，我得到的是一个非常简短的ItemDisplayModel.ToString（），然后是一个空字符串 ItemDisplayModel.ToString（）是我从列表中选择的ItemDisplayModel类型。这是有意义的，因
<UserControl
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:AuctionHouseSearchFilters="clr-namespace:Codefarts.WowTracks.DataMinerWPF.Models.AuctionHouseSearchFilters"
xmlns:Models="clr-namespace:Codefarts.WowTracks.DataMinerAppCore.Models;assembly=Codefarts.WowTracks.DataMinerAppCore"
xmlns:DataMinerAppCore="clr-namespace:Codefarts.WowTracks.DataMinerAppCore;assembly=Codefarts.WowTracks.DataMinerAppCore"
xmlns:dataMinerWpf="clr-namespace:Codefarts.WowTracks.DataMinerWPF"
x:Name="userControl"
x:Class="Codefarts.WowTracks.DataMinerWPF.Controls.AuctionHouseSearchFilters.AuctionHouseItemNameControl"
mc:Ignorable="d"
d:DesignHeight="51" d:DesignWidth="283">
<UserControl.Resources>
<dataMinerWpf:UriToBitmapImageConverter x:Key="UriToImageConverter" />
<BitmapImage x:Key='defaultImage' UriSource='/Resources\118.png' />
<DataTemplate x:Key="ItemTemplate" DataType="Models:ItemDisplayModel" >
<StackPanel Orientation="Horizontal" Margin="0 5 0 5">
<Image Width="50" Height="50" Stretch="Fill" Source="{Binding IconUrl, Converter={StaticResource UriToImageConverter}, TargetNullValue={StaticResource defaultImage}}" VerticalAlignment="Center" HorizontalAlignment="Center"/>
<Label Content="{Binding Name}" VerticalAlignment="Center" HorizontalAlignment="Center"/>
</StackPanel>
</DataTemplate>
</UserControl.Resources>
<UserControl.DataContext>
<AuctionHouseSearchFilters:AuctionHouseFilterItemNameModel/>
</UserControl.DataContext>
<Grid>
<Grid.RowDefinitions>
<RowDefinition Height="20"/>
</Grid.RowDefinitions>
<ComboBox x:Name="ItemList" MaxDropDownHeight="592" Grid.Row="0" ItemsSource="{Binding ItemDisplayModels}" ItemTemplate="{StaticResource ItemTemplate}" IsEditable="True" IsTextSearchEnabled="True" IsTextSearchCaseSensitive="False" Text="{Binding Value}" >
</ComboBox>
</Grid>
</UserControl>
[Export(typeof(IAuctionHouseSearchFilter))]
public class AuctionHouseFilterItemNameModel : IAuctionHouseSearchFilter, INotifyPropertyChanged
{
private string value;
private bool connected;
private Application app;
private ItemDisplayModel[] displayItems;
private CancellationTokenSource backgroundCancel;
private bool buildingDisplayItems;
private readonly object lockObject = new object();
private ItemDisplayModel displayValue;
// private bool Handled { get; set; }
public ItemDisplayModel DisplayValue
{
get
{
return this.displayValue;
}
set
{
if (value == null)
{
return;
}
this.Value = value.Name;
this.displayValue = value;
this.OnPropertyChanged();
}
}
public string Value
{
get
{
return this.value;
}
set
{
//if (this.Handled)
//{
// return;
//}
if (value == this.value)
{
return;
}
this.value = value;
// this.Handled = true;
this.OnPropertyChanged();
var cancellationTokenSource = this.backgroundCancel;
if (cancellationTokenSource != null)
{
cancellationTokenSource.Cancel();
}
this.BuildDisplayItems();
// this.Handled = false;
}
}
public IEnumerable<AuctionDataModel> Filter(MainFilterModel model, IEnumerable<AuctionDataModel> items)
{
if (!this.connected)
{
return items;
}
// get item id from it's name
var list = this.app.ItemNames[model.SelectedRegion];
var id = list.FirstOrDefault(x => x.Name.ToLowerInvariant().Contains(this.value.Trim().ToLowerInvariant()));
return items.Where(x => id != null && x.ItemId == id.Id);
}
public IEnumerable<ItemDisplayModel> ItemDisplayModels
{
get
{
return this.displayItems;
}
}
public async void BuildDisplayItems()
{
if (this.buildingDisplayItems)
{
return;
}
if (!this.connected)
{
this.displayItems = null;
}
// return this.GetDisplayItems();
this.buildingDisplayItems = true;
this.backgroundCancel = new CancellationTokenSource();
this.OnPropertyChanged("ItemDisplayModels");
await Task.Factory.StartNew(
() =>
{
var originalItems = this.displayItems;
this.displayItems = new[] { new ItemDisplayModel() { Name = "Rebuilding list..." } };
var correctedSearchValue = this.value.Trim().ToLowerInvariant();
//lock (this.lockObject)
//{
this.displayItems = (string.IsNullOrWhiteSpace(this.value) ?
this.app.DisplayItemModels :
this.app.DisplayItemModels.Where(x => x.Name.ToLowerInvariant().Contains(correctedSearchValue))).Take(100).AsParallel().ToArray();
this.buildingDisplayItems = false;
this.OnPropertyChanged("ItemDisplayModels");
},
this.backgroundCancel.Token);
}
public string Name
{
get
{
return "Item Name";
}
}
public Type Control
{
get
{
return typeof(AuctionHouseItemNameControl);
}
}
public virtual IAuctionHouseSearchFilter Clone()
{
return new AuctionHouseFilterItemNameModel()
{
Value = this.Value
};
}
public void Connect(Application app)
{
if (this.connected)
{
return;
}
this.app = app;
this.connected = true;
}
public void Disconnect()
{
if (!this.connected)
{
return;
}
this.app = null;
this.connected = false;
}
public event PropertyChangedEventHandler PropertyChanged;
[NotifyPropertyChangedInvocator]
protected virtual void OnPropertyChanged([CallerMemberName] string propertyName = null)
{
var handler = this.PropertyChanged;
if (handler != null)
{
handler(this, new PropertyChangedEventArgs(propertyName));
}
}
}
public class ItemDisplayModel : INotifyPropertyChanged
{
private string iconUrl;
private string region;
private string name;
private int itemId;
public int ItemId
{
get
{
return this.itemId;
}
set
{
if (value == this.itemId)
{
return;
}
this.itemId = value;
this.OnPropertyChanged();
}
}
public string Name
{
get
{
return this.name;
}
set
{
if (value == this.name)
{
return;
}
this.name = value;
this.OnPropertyChanged();
}
}
public string Region
{
get
{
return this.region;
}
set
{
if (value == this.region)
{
return;
}
this.region = value;
this.OnPropertyChanged();
}
}
public string IconUrl
{
get
{
return this.iconUrl;
}
set
{
if (value == this.iconUrl)
{
return;
}
this.iconUrl = value;
this.OnPropertyChanged();
}
}
public event PropertyChangedEventHandler PropertyChanged;
[NotifyPropertyChangedInvocator]
protected virtual void OnPropertyChanged([CallerMemberName] string propertyName = null)
{
var handler = this.PropertyChanged;
if (handler != null)
{
handler(this, new PropertyChangedEventArgs(propertyName));
}
}
}
[导出（类型（IAuctionHouseSearchFilter））]
公共类AuctionHouseFilterItemName模型：IAuctionHouseSearchFilter，INotifyPropertyChanged
{
私有字符串值；
私人楼宇联网；
私人应用程序；
私有ItemDisplayModel[]显示项；
私有取消令牌源背景取消；
私人楼宇显示项目；
私有只读对象lockObject=新对象（）；
私有项显示模型显示值；
//私有布尔处理{get；set；}
公共项显示模型显示值
{
得到
{
返回此.displayValue；
}
设置
{
如果（值==null）
{
返回；
}
this.Value=Value.Name；
this.displayValue=值；
this.OnPropertyChanged（）；
}
}
公共字符串值
{
得到
{
返回此.value；
}
设置
{
//如果（此项已处理）
//{
//返回；
//}
如果（值==此.value）
{
返回；
}
这个值=值；
//这个.Handled=true；
this.OnPropertyChanged（）；
var cancellationTokenSource=this.backgroundCancel；
if（cancellationTokenSource！=null）
{
cancellationTokenSource.Cancel（）；
}
this.BuildDisplayItems（）；
//这个.Handled=false；
}
}
公共IEnumerable筛选器（主筛选器模型，IEnumerable项）
{
如果（！this.connected）
{
退货项目；
}
//从其名称获取项目id
var list=this.app.ItemNames[model.SelectedRegion]；
var id=list.FirstOrDefault（x=>x.Name.ToLowerInvariant（）.Contains（this.value.Trim（）.ToLowerInvariant（））；
返回项目。其中（x=>id！=null&&x.ItemId==id.id）；
}
公共IEnumerable ItemDisplayModels
{
得到
{
返回此项。显示项目；
}
}
公共异步void BuildDisplayItems（）
{
if（this.buildingDisplayItems）
{
返回；
}
如果（！this.connected）
{
this.displayItems=null；
}
//返回此.GetDisplayItems（）；
this.buildingDisplayItems=true；
this.backgroundCancel=新的CancellationTokenSource（）；
此.OnPropertyChanged（“ItemDisplayModels”）；
等待Task.Factory.StartNew(
() =>
{
var originalItems=this.displayItems；
this.displayItems=new[]{new ItemDisplayModel（）{Name=“Rebuilding list…”}；
var correctedSearchValue=this.value.Trim（）.ToLowerInvariant（）；
//lock（this.lockObject）
//{
this.displayItems=（string.IsNullOrWhiteSpace（this.value））？
this.app.DisplayItemModels：
this.app.DisplayItemModels.Where（x=>x.Name.ToLowerInvariant（）.Contains（correctedSearchValue））.Take（100.aspallel（）.ToArray（）；
this.buildingDisplayItems=false；
此.OnPropertyChanged（“ItemDisplayModels”）；
},
此.backgroundCancel.Token）；
}
公共字符串名
{
得到
{
返回“项目名称”；
}
}
公共类型控制
{
得到
{
返回类型（AuctionHouseItemNameControl）；
}
}
公共虚拟IAuctionHouseSearchFilter克隆（）
{
返回新的AuctionHouseFilterIt
[Export(typeof(IAuctionHouseSearchFilter))]
public class AuctionHouseFilterItemNameModel : IAuctionHouseSearchFilter, INotifyPropertyChanged
{
private string value;
private bool connected;
private Application app;
private ItemDisplayModel[] displayItems;
private CancellationTokenSource backgroundCancel;
private bool buildingDisplayItems;
private readonly object lockObject = new object();
private ItemDisplayModel displayValue;
// private bool Handled { get; set; }
public ItemDisplayModel DisplayValue
{
get
{
return this.displayValue;
}
set
{
if (value == null)
{
return;
}
this.Value = value.Name;
this.displayValue = value;
this.OnPropertyChanged();
}
}
public string Value
{
get
{
return this.value;
}
set
{
//if (this.Handled)
//{
// return;
//}
if (value == this.value)
{
return;
}
this.value = value;
// this.Handled = true;
this.OnPropertyChanged();
var cancellationTokenSource = this.backgroundCancel;
if (cancellationTokenSource != null)
{
cancellationTokenSource.Cancel();
}
this.BuildDisplayItems();
// this.Handled = false;
}
}
public IEnumerable<AuctionDataModel> Filter(MainFilterModel model, IEnumerable<AuctionDataModel> items)
{
if (!this.connected)
{
return items;
}
// get item id from it's name
var list = this.app.ItemNames[model.SelectedRegion];
var id = list.FirstOrDefault(x => x.Name.ToLowerInvariant().Contains(this.value.Trim().ToLowerInvariant()));
return items.Where(x => id != null && x.ItemId == id.Id);
}
public IEnumerable<ItemDisplayModel> ItemDisplayModels
{
get
{
return this.displayItems;
}
}
public async void BuildDisplayItems()
{
if (this.buildingDisplayItems)
{
return;
}
if (!this.connected)
{
this.displayItems = null;
}
// return this.GetDisplayItems();
this.buildingDisplayItems = true;
this.backgroundCancel = new CancellationTokenSource();
this.OnPropertyChanged("ItemDisplayModels");
await Task.Factory.StartNew(
() =>
{
var originalItems = this.displayItems;
this.displayItems = new[] { new ItemDisplayModel() { Name = "Rebuilding list..." } };
var correctedSearchValue = this.value.Trim().ToLowerInvariant();
//lock (this.lockObject)
//{
this.displayItems = (string.IsNullOrWhiteSpace(this.value) ?
this.app.DisplayItemModels :
this.app.DisplayItemModels.Where(x => x.Name.ToLowerInvariant().Contains(correctedSearchValue))).Take(100).AsParallel().ToArray();
this.buildingDisplayItems = false;
this.OnPropertyChanged("ItemDisplayModels");
},
this.backgroundCancel.Token);
}
public string Name
{
get
{
return "Item Name";
}
}
public Type Control
{
get
{
return typeof(AuctionHouseItemNameControl);
}
}
public virtual IAuctionHouseSearchFilter Clone()
{
return new AuctionHouseFilterItemNameModel()
{
Value = this.Value
};
}
public void Connect(Application app)
{
if (this.connected)
{
return;
}
this.app = app;
this.connected = true;
}
public void Disconnect()
{
if (!this.connected)
{
return;
}
this.app = null;
this.connected = false;
}
public event PropertyChangedEventHandler PropertyChanged;
[NotifyPropertyChangedInvocator]
protected virtual void OnPropertyChanged([CallerMemberName] string propertyName = null)
{
var handler = this.PropertyChanged;
if (handler != null)
{
handler(this, new PropertyChangedEventArgs(propertyName));
}
}
}
public class ItemDisplayModel : INotifyPropertyChanged
{
private string iconUrl;
private string region;
private string name;
private int itemId;
public int ItemId
{
get
{
return this.itemId;
}
set
{
if (value == this.itemId)
{
return;
}
this.itemId = value;
this.OnPropertyChanged();
}
}
public string Name
{
get
{
return this.name;
}
set
{
if (value == this.name)
{
return;
}
this.name = value;
this.OnPropertyChanged();
}
}
public string Region
{
get
{
return this.region;
}
set
{
if (value == this.region)
{
return;
}
this.region = value;
this.OnPropertyChanged();
}
}
public string IconUrl
{
get
{
return this.iconUrl;
}
set
{
if (value == this.iconUrl)
{
return;
}
this.iconUrl = value;
this.OnPropertyChanged();
}
}
public event PropertyChangedEventHandler PropertyChanged;
[NotifyPropertyChangedInvocator]
protected virtual void OnPropertyChanged([CallerMemberName] string propertyName = null)
{
var handler = this.PropertyChanged;
if (handler != null)
{
handler(this, new PropertyChangedEventArgs(propertyName));
}
}
}
<ComboBox x:Name="ItemList"
Grid.Row="0"
IsEditable="True"
IsTextSearchCaseSensitive="False"
IsTextSearchEnabled="True"
ItemTemplate="{StaticResource ItemTemplate}"
ItemsSource="{Binding ItemDisplayModels}"
MaxDropDownHeight="592"
TextSearch.TextPath="Name" />