[英]changing selected value of Combobox in DataGrid wpf
亲爱的,我在Datagrid中有一个combobox列绑定到ViewModel中的可观察集合Markets,而DataGrid绑定到Collection ClientMarketCode集合,NewClient对象中是集合。 ClientMarketCode具有此属性Code,MarketCodeTypeID,MarketID。 所以我使用了绑定到市场的组合框,以防用户想要编辑显示所有市场的市场,并且用户选择了他想要的市场。我在选择任何其他市场时遇到问题,因为选择后行中的市场价值没有变化combobox的新市场。
例如:
可以说第一行有KSA市场,然后在单击USA后将其从baco更改为USA,然后将其从组合框更改为USA,我不知道。
这是我的视图模型:
public class MarketsViewModel : ObservableObject, IMarketsViewModel, INavigationAware, IConfirmNavigationRequest, IRegionMemberLifetime
{
#region MarketsViewModel
public MarketsViewModel()
{
this.GetMarkets();
}
public ObservableCollection<Market> Markets
{
get { return m_Market; }
set
{
m_Market = value;
RaisePropertyChanged("Markets");
}
}
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);
}
}
}
继承XAML:
<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="Code"/>-->
<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>
总结一下我的评论,您的绑定应该是:
<DataTemplate>
<ComboBox Name="cmbMarkets" DisplayMemberPath="NameA"
ItemsSource= "{Binding RelativeSource={RelativeSource FindAncestor,AncestorType=my:MarketsView},Path=DataContext.Markets}"
SelectedItem="{Binding MarketCodeType.Market, Mode=TwoWay}"/>
</DataTemplate>
或(对此不确定)
<DataTemplate>
<ComboBox Name="cmbMarkets" DisplayMemberPath="NameA"
ItemsSource= "{Binding RelativeSource={RelativeSource FindAncestor,AncestorType=my:MarketsView},Path=DataContext.Markets}"
SelectedValue="{Binding MarketCodeType.Market.MarketID, Mode=TwoWay}"
SelectedValuePath="MarketID"/>
</DataTemplate>
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