Hierarchical XamDataGrid XamComboEditor Binding / DataContext Ancestor

Question

我认为这应该很简单，但我在将comss列上的itemssource值绑定时遇到了问题，该列是分层XamDataGrid的一部分。我的datacontext在包含数据网格的GRID上设置为集合。

hiererchy高级看起来像这样：

表（根）    - ＆GT; Field（此处定义的Combobox集合）       - ＆GT;映射（此处为Combobox列）

每个字段都可以有自己的映射，映射上的目标值对每个字段都是唯一的。

在后面的代码中，我构建了我的集合并将DataContext设置为Grid： DataGridTransformations.DataContext = MapColl;

这是一个帮助我更有意义的屏幕：

这是XAML：

<Grid x:Name="GridTransformations" Background="#FFFAFADB" DataContext="MSC_Conversion_Tools.Models.MapSourceColl">
                <Custom:XamDataGrid x:Name="DataGridTransformations" DataSource="{Binding TableEntities}" HorizontalAlignment="Left" Margin="10,10,0,0" VerticalAlignment="Top" Height="600" Width="966" Loaded="DataGridTransformations_Loaded">
                    <Custom:XamDataGrid.FieldLayouts>
                        <Custom:FieldLayout>
                            <Custom:FieldLayout.Fields>
                                <Custom:Field Name="TableEntities"/>
                            </Custom:FieldLayout.Fields>
                        </Custom:FieldLayout>

                        <Custom:FieldLayout Key="TableEntities">
                            <Custom:FieldLayout.Fields>
                                <Custom:Field Name="EntityName" Label="Table Name"></Custom:Field>
                                <Custom:Field Name="Fields"/>
                            </Custom:FieldLayout.Fields>



                        </Custom:FieldLayout>

                        <Custom:FieldLayout Key="Fields">
                            <Custom:FieldLayout.Fields>
                                <Custom:Field Name="FieldName" Label="Field"></Custom:Field>
                                <Custom:Field Name="DefaultValue" Label="Default Value"></Custom:Field>
                                <Custom:Field Name="DefaultOnlyNonNullValues" Label="Default: Include Null Fields?" Width="300"></Custom:Field>
                                <Custom:Field Name="FunctionWrapName" Label="Function"></Custom:Field>
                                <Custom:Field Name="Mappings"></Custom:Field>
                            </Custom:FieldLayout.Fields>
                        </Custom:FieldLayout>

                        <Custom:FieldLayout Key="Mappings">
                            <Custom:FieldLayout.Fields>
                                <Custom:Field Name="SourceValue" Label="Source Vaue"></Custom:Field>
                                <Custom:Field Name="TargetValue" Label="Target Value" >
                                    <Custom:Field.Settings>
                                        <Custom:FieldSettings EditorType="{x:Type igEditors:XamComboEditor}" AllowEdit="True">
                                            <Custom:FieldSettings.EditorStyle>
                                                <Style TargetType="{x:Type igEditors:XamComboEditor}">
                                                    <Setter Property="ItemsSource" Value="{Binding Path=DataContext.MappingTargetCmbValues, RelativeSource={RelativeSource FindAncestor, AncestorType={x:Type Custom:XamDataGrid}}}" />
                                                    <Setter Property="DisplayMemberPath" Value="Name"/>
                                                    <Setter Property="ValuePath" Value="Id" />
                                                </Style>
                                            </Custom:FieldSettings.EditorStyle>

                                        </Custom:FieldSettings>
                                    </Custom:Field.Settings>
                                </Custom:Field>

                            </Custom:FieldLayout.Fields>
                        </Custom:FieldLayout>


                    </Custom:XamDataGrid.FieldLayouts>
                </Custom:XamDataGrid>
            </Grid>

这里还有我的Field类，其中包含我的组合框值集合MappingTargetCmbValues（我可能也没有这样做）：

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Collections.ObjectModel;

namespace MSC_Conversion_Tools.Models
{
    class Field
    {
        public Field(string Name)
        {
            FieldName = Name;
            DefaultOnlyNonNullValues = false;
        }
        public string FieldName { get; set; }
        public string DefaultValue { get; set; }
        public Boolean DefaultOnlyNonNullValues { get; set; }
        public string FunctionWrapName { get; set; }
        public ObservableCollection<Mapping> Mappings { get; set; }
        public ObservableCollection<MappingTargetCmbValue> MappingTargetCmbValues;
    }
}

非常感谢任何帮助。谢谢！

Answer 1

我可能会弄错，但看起来 MappingTargetCmbValues 是一个字段而不是属性。 Btw绑定到Host.DataContext.MappingTargetCmbValues与RelativeSource为SelfS可能会比FindAncestor绑定更好。