上一个DataGrid结合我有我使用双向在WPF
var allLines = from Lines in ctx.InvoiceLines join PerPs in ctx.ProductsViews on Lines.ProductCode equals PerPs.ProductCode
where (Lines.BranchNo == BrNo) && (Lines.Docket == Docket)
select new { Lines.ProductCode, Lines.Description, Lines.Inv_Quantity, Lines.Grn_Quantity,
Lines.Inv_Price,Lines.Grn_Price,Lines.Inv_Total, Lines.Grn_Total, Lines.AnalCode,
Lines.Vat_Rate, Lines.GrnNo,Lines.Comment , PerPs.OuterUnits};
dgGrid.ItemsSource = allLines;
我想用双向绑定更新数据库时的任何值被改变或者新的行填充一个WPF的DataGrid被添加。那可能吗?
我的XAML代码是
<DataGrid Grid.Row="3" x:Name="dgGrid" DataContext="{Binding}" FontSize="16" HorizontalScrollBarVisibility="Visible"
VerticalScrollBarVisibility="Visible" SelectionUnit="FullRow" SelectionMode="Extended" AutoGenerateColumns="False"
SelectionChanged="dgGrid_SelectionChanged" >
<DataGrid.Columns>
<DataGridTextColumn Width="Auto" Header="ProductCode" Binding="{Binding ProductCode, Mode=TwoWay, Path=IsSelected, UpdateSourceTrigger=PropertyChanged}"/>
<DataGridTextColumn Width="250" Header="Description" Binding="{Binding Description, Mode=TwoWay, Path=IsSelected, UpdateSourceTrigger=PropertyChanged}" FontSize="14"/>
<DataGridTextColumn Width="61" Header="Inv_Quantity" Binding="{Binding Inv_Quantity, Mode=TwoWay, Path=IsSelected, UpdateSourceTrigger=PropertyChanged}"/>
<DataGridTextColumn Width="63" Header="Grn_Quantity" Binding="{Binding Grn_Quantity, Mode=TwoWay, Path=IsSelected, UpdateSourceTrigger=PropertyChanged}"/>
<DataGridTextColumn Width="59" Header="Inv_Price" Binding="{Binding Inv_Price, Mode=TwoWay, Path=IsSelected, UpdateSourceTrigger=PropertyChanged}"/>
<DataGridTextColumn Width="61" Header="Ord_Price" Binding="{Binding Grn_Price, Mode=TwoWay, Path=IsSelected, UpdateSourceTrigger=PropertyChanged}"/>
<DataGridTextColumn Width="72" Header="Inv_Total" Binding="{Binding Inv_Total, Converter={StaticResource Currency}, Mode=TwoWay, Path=IsSelected, UpdateSourceTrigger=PropertyChanged}"/>
<DataGridTextColumn Width="74" Header="Grn_Total" Binding="{Binding Grn_Total, Converter={StaticResource Currency}, Mode=TwoWay, Path=IsSelected, UpdateSourceTrigger=PropertyChanged}"/>
<DataGridTextColumn Width="58" Header="AnalCode" Binding="{Binding AnalCode, Mode=TwoWay, Path=IsSelected, UpdateSourceTrigger=PropertyChanged}"/>
<DataGridTextColumn Width="40" Header="Vat_Rate" Binding="{Binding Vat_Rate, Mode=TwoWay, Path=IsSelected, UpdateSourceTrigger=PropertyChanged}"/>
<DataGridTextColumn Width="Auto" Header="GrnNo" Binding="{Binding GrnNo, Mode=TwoWay, Path=IsSelected, UpdateSourceTrigger=PropertyChanged}"/>
<DataGridTextColumn Width="Auto" Header="Comment" Binding="{Binding Comment, Mode=TwoWay, Path=IsSelected, UpdateSourceTrigger=PropertyChanged}"/>
<DataGridTextColumn Width="Auto" Header="PerP" Binding="{Binding OuterUnits}" IsReadOnly="True"/>
</DataGrid.Columns>
<DataGrid.Resources>
<SolidColorBrush x:Key="{x:Static SystemColors.HighlightBrushKey}" Color="LightSteelBlue"/>
</DataGrid.Resources>
</DataGrid>
当我运行这段代码所有,但PERP栏是空的。
我很迷茫,如何做到最好的方式,所以任何帮助将非常感激。
是否有另一种方法可以支持更新的双向绑定? – Noelle
是的,通过绑定到你想要更新的实际对象的实例,在你的情况下这将是由实体框架跟踪的实体。我假设你最终想要将更改保存回数据库,因此更新会影响正在进行更改跟踪的EF实体,这样以后所有更改都可以刷新到数据库。 –
你有链接到任何网站,可以显示如何做到这一点? – Noelle