wpf mvvm 下DataGrid内容DataGridComboBoxColumn下拉框怎么绑定数据源？

2021-05-03 05:01:48 3.8k 阅读 AI 写同款 · GEO 优化AI 选题数据监测一键分发 ›

WPF DataGrid中ComboBox数据绑定与联动实战指南在WPF桌面应用开发中，数据绑定是实现视图与模型分离的核心机制，它通过INotifyPropertyChanged接口和ObservableCollection等组件，建立起数据与UI的动态响应关系。其技术价值在于提升代码可维护性、实现数据驱动界面更新，并支持复杂的用户交互逻辑。这一原理在数据密集型表单场景中尤为重要，例如在DataGrid表格内集成可交互的下拉选择控件。本文将深入探讨如何在DataGrid中实现ComboBox列的深度数据绑定、默认值显示以及跨列动态联动，通过DataGridTemplat 阅读详情

<DataGrid  IsReadOnly="False"  AutoGenerateColumns="False" Background="white"

                  CanUserResizeColumns="False" CanUserResizeRows="False"  SelectionMode="Single" 

                  CanUserReorderColumns="False" AlternationCount="2"  RowHeaderWidth="0" CanUserAddRows="False" ItemsSource="{Binding StaffVos,Mode=TwoWay}" SelectedItem="{Binding SelectStaffEntity}" >

                    <!--设置列-->

                    <DataGrid.Columns>

                        <DataGridCheckBoxColumn Header="选择" Binding="{Binding IsSelected}" x:Name="select" Width="1*"/>

                        <DataGridTextColumn Header="货品ID"  Visibility="Collapsed" Binding="{Binding ProductInformationID}"  Width="10" />

                        <DataGridTextColumn Header="货品编码" Binding="{Binding ProductCoding}" Width="1*"/>

                        <DataGridTextColumn Header="货品名称" Binding="{Binding ProductName}" Width="2*"/>

                        <DataGridTextColumn Header="批  次" Binding="{Binding Batch,Mode=TwoWay,UpdateSourceTrigger=PropertyChanged}" Width="1*"/>

                        <DataGridComboBoxColumn Header="质  量" Width="*"  ItemsSource="{Binding QualityGauge}"  DisplayMemberPath="{Binding QualityGaugeName}" SelectedValuePath="{Binding QualityGaugeID}" 

                                   TextBinding="{Binding QualityGauge}"  SelectedValueBinding="{Binding QualityGauge}"  />

                        <DataGridTextColumn Header="数量" Binding="{Binding Quantity,Mode=TwoWay,UpdateSourceTrigger=PropertyChanged}" Width="1*"/>

                        <DataGridTextColumn Header="备注" Binding="{Binding Remark,Mode=TwoWay,UpdateSourceTrigger=PropertyChanged}" Width="2*"/>

                        <DataGridTemplateColumn Header="单位" Width="1*">

                            <DataGridTemplateColumn.CellTemplate>

                                <DataTemplate DataType="models:MyModelDescription">

                                    <ComboBox ItemsSource="{Binding UnitSheet}" DisplayMemberPath="UnitSheetName" SelectedValuePath="UnitSheetID" SelectedItem="{Binding UnitSheetID, NotifyOnTargetUpdated=True, UpdateSourceTrigger=PropertyChanged}"></ComboBox>

                                </DataTemplate>

                            </DataGridTemplateColumn.CellTemplate>

                        </DataGridTemplateColumn>

                    </DataGrid.Columns>

                </DataGrid>

这是xaml的DataGrid 我需要把质量这个列的下拉框绑定数据源；

<DataGridComboBoxColumn Header="质  量" Width="*"  ItemsSource="{Binding QualityGauge}"  DisplayMemberPath="{Binding QualityGaugeName}" SelectedValuePath="{Binding QualityGaugeID}" 

                                   TextBinding="{Binding QualityGauge}"  SelectedValueBinding="{Binding QualityGauge}"  />

单位那里我用了ComboBox 绑定下拉项，但是两种我都试了一些方法，都绑定不上去。

 /// <summary>

        /// 单位

        /// </summary>

        private List<D_UnitSheet> _UnitSheet;

        public List<D_UnitSheet> UnitSheet

        {

            get { return _UnitSheet; }

            set

            {

                if (_UnitSheet != value)

                {

                    _UnitSheet = value;

                    RaisePropertyChanged(() => UnitSheet);

                }

            }

        }



        /// <summary>

        /// 质量

        /// </summary>

        private List<D_QualityGauge> _QualityGauge;

        public List<D_QualityGauge> QualityGauge

        {

            get { return _QualityGauge; }

            set

            {

                if (_QualityGauge != value)

                {

                    _QualityGauge = value;

                    RaisePropertyChanged(() => QualityGauge);

                }

            }

        }

这里是和下拉框ItemsSource关联的那个。

//单位

        private List<D_UnitSheet> DanWei()

        {

            List<D_UnitSheet> UnitSheet = (from tbUnitSheet in myModel.D_UnitSheet select tbUnitSheet).ToList();

           

            return UnitSheet;

        }



        //质量

        private List<D_QualityGauge> ZhiLiang()

        {

            List<D_QualityGauge> QualityGauge = (from tbQualityGauge in myModel.D_QualityGauge select tbQualityGauge).ToList();

            return QualityGauge;

        }





//绑定就是在需要的地方直接给下拉框的ItemsSource赋值查询出来的数据，

//页面上的下拉框就是这样绑定的但是表格里的不行。我也尝试了其他方法最终还是失败了。

////单位

      UnitSheet = DanWei();

            

    ////质量

      QualityGauge = ZhiLiang();