C# wpf DataGrid MVVM中的2个相关组合框
有人举过将2个相关ComboBox绑定到DataGrid的选定项的例子吗？我试过了，但似乎没能成功。我是MVVM的新手，所以我做错了什么 我有一个datagrid，它绑定到ViewModel中名为C# wpf DataGrid MVVM中的2个相关组合框,c#,wpf,mvvm,datagrid,C#,Wpf,Mvvm,Datagrid,有人举过将2个相关ComboBox绑定到DataGrid的选定项的例子吗？我试过了，但似乎没能成功。我是MVVM的新手，所以我做错了什么 我有一个datagrid，它绑定到ViewModel中名为NewClient的对象中的集合 clientmarketcode。 ClientMarketCodes具有名为MarketCodeTypes的导航属性，该属性具有市场导航属性。所以我想在数据网格中显示代码，MarketCodeTyeName，MarketName。 我已经成功地在DataGrid组合框
NewClientclientmarketcodeClientMarketCodesMarketCodeTypesMarketCodeTyeNameMarketNameMarketsMarketCodeTypesMarketsMaketCodeTypesMarketCodeTypesMarketsMarketCodeTypesMarketCodeTypesMarketCodeTypes市场public class MarketsViewModel : ObservableObject, IMarketsViewModel, INavigationAware, IConfirmNavigationRequest, IRegionMemberLifetime
{
#region MarketsViewModel
public MarketsViewModel()
{
//NewClient.ClientMarketCodes[0].MarketCodeType.MarketID
//MarketCodeTypes = new ObservableCollection<MarketCodeType>();
this.GetMarkets();
//this.GetMarketCodeTypes();
this.PropertyChanged += MarketssViewModel_PropertyChanged;
}
private void MarketssViewModel_PropertyChanged(object sender, System.ComponentModel.PropertyChangedEventArgs e)
{
switch (e.PropertyName)
{
case "selectedMarket":
{
if (selectedMarket != null)
{
GetMarketCodeTypes();
}
break;
}
}
}
#endregion
#region --Members--
private ObservableCollection<Market> m_Market;
private ObservableCollection<MarketCodeType> m_MarketCodeType;
private List<MarketCodeType> m_MarketCodeTypes;
public List<MarketCodeType> MarketCodeTypesList
{
get
{
if (m_MarketCodeTypes == null)
{
m_MarketCodeTypes = new List<MarketCodeType>();
}
return m_MarketCodeTypes;
}
set
{
m_MarketCodeTypes = value;
RaisePropertyChanged("MarketCodeTypesList");
RaisePropertyChanged("MarketCodeTypes");
}
}
public ObservableCollection<MarketCodeType> MarketCodeTypes
{
get
{
if (MarketCodeTypesList != null)
return new ObservableCollection<MarketCodeType>(MarketCodeTypesList);
else
return new ObservableCollection<MarketCodeType>();
}
}
#endregion
#region --Properties--
public ObservableCollection<Market> Markets
{
get { return m_Market; }
set
{
m_Market = value;
RaisePropertyChanged("Markets");
}
}
private Market _selectedMarket;
public Market selectedMarket
{
get { return _selectedMarket; }
set
{
if (_selectedMarket != value)
{
_selectedMarket = value;
RaisePropertyChanged("selectedMarket");
RaisePropertyChanged("MarketCodeTypes");
}
}
}
#endregion
private void GetMarkets()
{
try
{
Market[] MarketArr;
using (var client = new ClientServiceProxy())
{
MarketArr = client.GetAllMarkets();
}
if (MarketArr != null)
{
this.Markets = new ObservableCollection<Market>(MarketArr);
}
}
catch (Exception e)
{
MessageBox.Show(e.Message);
}
}
private void GetMarketCodeTypes()
{
try
{
MarketCodeType[] MarketCodeTypeArr;
using (var client = new ClientServiceProxy())
{
MarketCodeTypeArr = client.GetAllMarketCodeTypes().Where(c=>c.MarketID==selectedMarket.marketID).ToArray();
}
if (MarketCodeTypeArr != null)
{
MarketCodeTypesList = MarketCodeTypeArr.ToList();
}
else
{ MarketCodeTypesList = new List<MarketCodeType>(); }
}
catch (Exception e)
{
MessageBox.Show(e.Message);
}
}
}`
public类MarketsViewModel:observeObject、IMarketsViewModel、iAvigationAware、IConfirmNavigationRequest、IRegionMemberLifetime
{
#区域市场可视模型
公共市场可视模型（）
{
//NewClient.ClientMarketCodes[0]。MarketCodeType.MarketID
//MarketCodeTypes=新的ObservableCollection（）；
这个。GetMarkets（）；
//这个.GetMarketCodeTypes（）；
this.PropertyChanged+=MarketsViewModel\u PropertyChanged；
}
私有void MarketsViewModel\u PropertyChanged（对象发送方，System.ComponentModel.PropertyChangedEventArgs e）
{
开关（如PropertyName）
{
案例“selectedMarket”：
{
如果（selectedMarket！=null）
{
GetMarketCodeTypes（）；
}
打破
}
}
}
#端区
#地区——成员--
私人可观测集市；
私有可观察收集m_MarketCodeType；
私有列表m_MarketCodeType；
公共列表MarketCodeTypesList
{
得到
{
if（m_MarketCodeTypes==null）
{
m_MarketCodeTypes=新列表（）；
}
返回m_MarketCodeType；
}
设置
{
m_MarketCodeTypes=值；
RaisePropertyChanged（“MarketCodeTypesList”）；
RaisePropertyChanged（“MarketCodeType”）；
}
}
公共可观察收集MarketCodeType
{
得到
{
if（MarketCodeTypesList！=null）
返回新的ObservableCollection（MarketCodeTypesList）；
其他的
返回新的ObservableCollection（）；
}
}
#端区
#区域--属性--
公开募捐市场
{
获取{返回m_市场；}
设置
{
m_市场=价值；
融资产权变更（“市场”）；
}
}
私人市场(选择市场);；
公开市场选择市场
{
获取{return\u selectedMarket；}
设置
{
如果（_selectedMarket！=值）
{
_selectedMarket=值；
RaisePropertyChanged（“selectedMarket”）；
RaisePropertyChanged（“MarketCodeType”）；
}
}
}
#端区
私人市场（）
{
尝试
{
市场【】市场arr；
使用（var client=new ClientServiceProxy（））
{
MarketArr=client.GetAllMarkets（）；
}
if（MarketArr！=null）
{
此。市场=新的可观察集合（MarketArr）；
}
}
捕获（例外e）
{
MessageBox.Show（e.Message）；
}
}
私有void GetMarketCodeTypes（）
{
尝试
{
MarketCodeType[]MarketCodeTypeArr；
使用（var client=new ClientServiceProxy（））
{
MarketCodeTypeArr=client.GetAllMarketCodeTypes（）。其中（c=>c.MarketID==selectedMarket.MarketID.ToArray（）；
}
如果（MarketCodeTypeArr！=null）
{
MarketCodeTypesList=MarketCodeTypeArr.ToList（）；
}
其他的
{MarketCodeTypesList=新列表（）；}
}
捕获（例外e）
{
MessageBox.Show（e.Message）；
}
}
}`
<Grid x:Name="grid2" RenderTransformOrigin="0.5,0.5">
<Custom:C1DataGrid x:Name="c1DataGrid"
AutoGenerateColumns="False"
Height="490"
ItemsSource="{Binding Path=NewClient.ClientMarketCodes,Mode=TwoWay,UpdateSourceTrigger=LostFocus,ValidatesOnDataErrors=True,ValidatesOnExceptions=True}">
<LinearGradientBrush EndPoint="0.5,1" StartPoint="0.5,0">
<GradientStop Color="#FFBEBE00" Offset="0.5"/>
<GradientStop Color="#FFEDED9A" Offset="0.496"/>
</LinearGradientBrush>
</Custom:C1DataGrid.HeaderBackground>
<Custom:C1DataGrid.Columns>
<!--<Custom:DataGridCheckBoxColumn Header="???? ?????"/>-->
<Custom:DataGridTextColumn Header="Code" Binding="{Binding Code,Mode=TwoWay}" IsReadOnly="False" />
<Custom:DataGridTemplateColumn Header="MarketCodeType" >
<Custom:DataGridTemplateColumn.CellTemplate>
<DataTemplate>
<TextBlock Text="{Binding MarketCodeType.NameA}"/>
</DataTemplate>
</Custom:DataGridTemplateColumn.CellTemplate>
<Custom:DataGridTemplateColumn.CellEditingTemplate>
<DataTemplate>
<ComboBox Name="cmbMarketCodeTypes"
ItemsSource="{Binding RelativeSource={RelativeSource FindAncestor,AncestorType=my:MarketsView},Path=DataContext.MarketCodeTypes}"
DisplayMemberPath="NameA"
SelectedValue="{Binding Path=MarketCodeTypeID,Mode=TwoWay,ValidatesOnDataErrors=True}"
/>
</DataTemplate>
</Custom:DataGridTemplateColumn.CellEditingTemplate>
</Custom:DataGridTemplateColumn>
<Custom:DataGridTemplateColumn Header="Markets">
<Custom:DataGridTemplateColumn.CellTemplate>
<DataTemplate>
<TextBlock Text="{Binding MarketCodeType.Market.NameA}"/>
</DataTemplate>
</Custom:DataGridTemplateColumn.CellTemplate>
<Custom:DataGridTemplateColumn.CellEditingTemplate>
<DataTemplate>
<ComboBox Name="cmbMarkets" ItemsSource= "{Binding RelativeSource={RelativeSource FindAncestor,AncestorType=my:MarketsView},Path=DataContext.Markets,Mode=TwoWay}"
DisplayMemberPath="NameA" SelectedValue="{Binding Path=MarketCodeType.Market.MarketID,Mode=TwoWay}"
SelectedValuePath="MarketCodeType.MarketID"
SelectedItem="{Binding RelativeSource={RelativeSource FindAncestor,AncestorType=my:MarketsView},Path=DataContext.selectedMarket,Mode=TwoWay}" />
</DataTemplate>
</Custom:DataGridTemplateColumn.CellEditingTemplate>
</Custom:DataGridTemplateColumn>
</Custom:DataGridTemplateColumn>
</Custom:C1DataGrid.Columns>
</Custom:C1DataGrid>