c# - 使用 TokenLookUpEdit 的 SelectedItems 填充 WPF Datagrid

Question

我在使用我在 TokenLookUpEdit 中选择的值来填充数据网格时遇到问题，其中发票号 = TokenLookUpEdit 选择的值

这是我的代码:

   using (MySqlConnection cn = new MySqlConnection() { ConnectionString = "DataSource='" + DoSomething.Server_Param + "';UserID='" + DoSomething.Uid_Param + "';Password='" + DoSomething.Password_Param + "';Database='" + DoSomething.Database_Param + "';PORT=3306;CHARSET=utf8" })
            {
                using (MySqlCommand cmd = new MySqlCommand()
                {
                    Connection = cn,
                    CommandText = "SELECT InvoiceNumber,ItemCode,ItemName,Items_QTY,Reservation_Date, " +
                    "EngName,UserName,Address,InvoiceStore,ContsrType,Place FROM Delta_Invoices_Grid where InvoiceNumber  ='"+ InvoicesNumbersCombo.Text + "'"
                })
                {
                    cn.Open();
                    MySqlDataReader dr = cmd.ExecuteReader();
                    DataTable dt = new DataTable();
                    dt.Load(dr);
                    InvoicesDetails_Grid.ItemsSource = dt.DefaultView;
                    cn.Close();



                }


                }

现在的问题是 datagrid 只使用 TokenLookUpEdit 中的一个值，而不是所有选定的值，我已经从昨天开始搜索但找不到解决方案

这是 TokenLookUpEdit 和 Datagrid 的 XAML 代码:

<GroupBox Header="أرقام الفواتير" Margin="76,10,592,439" FlowDirection="RightToLeft" FontFamily="Droid Arabic Kufi">
            <dxg:LookUpEdit x:Name="InvoicesNumbersCombo" Margin="16,12,16,16"
                                    ItemsSource="{Binding Delta_Invoices_Grid}"
                                    EditValue="{Binding InvoiceNumber, Mode=OneWay}" AutomationProperties.IsColumnHeader="True"
                                  >
                <dxg:LookUpEdit.StyleSettings>
                    <dxg:TokenLookUpEditStyleSettings />
                </dxg:LookUpEdit.StyleSettings>
            </dxg:LookUpEdit>

        </GroupBox>

        <DataGrid x:Name="InvoicesDetails_Grid" FlowDirection="RightToLeft" IsReadOnly="True" SelectionUnit="FullRow" AutoGenerateColumns="False" CanUserAddRows="True" ItemsSource="{Binding Dawam_Grid_ItemsBinding}" Margin="460,129,10,243">
            <DataGrid.Resources>
                <Style BasedOn="{StaticResource {x:Type DataGridColumnHeader}}" TargetType="{x:Type DataGridColumnHeader}">
                    <Setter Property="Background" Value="#464646" />
                    <Setter Property="Foreground" Value="#F0F0F0" />


                </Style>

                <Style TargetType="{x:Type DataGridRow}">
                    <Setter Property="Foreground" Value="#F88E1D"/>
                </Style>
                <Style TargetType="{x:Type ScrollBar}" >
                    <Setter Property="Background" Value="#FAFAFA" />

                </Style>



                <Style TargetType="{x:Type DataGridCell}">
                    <Style.Triggers>
                        <Trigger Property="IsSelected" Value="True">
                            <Setter Property="Background" Value="#360E05"/>
                        </Trigger>
                    </Style.Triggers>
                </Style>

            </DataGrid.Resources>
            <DataGrid.Background>
                <LinearGradientBrush EndPoint="0.5,1" StartPoint="0.5,0">
                    <GradientStop Color="#464646" Offset="0.221"/>
                    <GradientStop Color="#4E93CA" Offset="1"/>
                </LinearGradientBrush>
            </DataGrid.Background>
            <DataGrid.RowBackground >
                <LinearGradientBrush EndPoint="0.5,1" StartPoint="0.5,0">
                    <GradientStop Color="Transparent" Offset="0.221"/>
                    <GradientStop Color="Transparent" Offset="1"/>
                </LinearGradientBrush>
            </DataGrid.RowBackground>
            <DataGrid.Columns>
                <DataGridTextColumn Header="رقم الفاتورة" x:Name="InvoiceNumber" IsReadOnly="True" Binding="{Binding InvoiceNumber}" Foreground="#F0F0F0"/>
                <DataGridTextColumn Header="كود الصنف" x:Name="ItemCode" IsReadOnly="True" Binding="{Binding ItemCode}" Foreground="#F0F0F0"/>
                <DataGridTextColumn Header="إسم الصنف" x:Name="ItemName" Width="250"  IsReadOnly="True" Binding="{Binding ItemName}" Foreground="#F0F0F0"/>

                <DataGridTextColumn Header="الكمية" x:Name="Items_QTY" IsReadOnly="True" Binding="{Binding Items_QTY}" Foreground="#F0F0F0"/>
                <DataGridTextColumn Header="تاريخ التركيب" x:Name="Reservation_Date" IsReadOnly="True" Binding="{Binding Reservation_Date, StringFormat=dd/MM/yyyy}" Foreground="#F0F0F0"/>
                <DataGridTextColumn Header="إسم المهندس" x:Name="EngName" Width="70" IsReadOnly="True" Binding="{Binding EngName}"  Foreground="#F0F0F0"/>
                <DataGridTextColumn Header="إسم البائع" x:Name="UserName" IsReadOnly="True" Binding="{Binding UserName}" Foreground="#F0F0F0"/>
                <DataGridTextColumn Header="العنوان" x:Name="Address" Width="70" IsReadOnly="True" Binding="{Binding Address}"  Foreground="#F0F0F0"/>
                <DataGridTextColumn Header="المعرض" x:Name="InvoiceStore" IsReadOnly="True" Binding="{Binding InvoiceStore}" Foreground="#F0F0F0"/>
                <DataGridTextColumn Header="نوع التركيب" x:Name="ContsrType" Width="70" IsReadOnly="True" Binding="{Binding ContsrType}"  Foreground="#F0F0F0"/>
                <DataGridTextColumn Header="مكان التركيب" x:Name="Place" Width="70" IsReadOnly="True" Binding="{Binding Place}"  Foreground="#F0F0F0"/>
                <DataGridTextColumn Header="الفني" x:Name="TechName" Width="70" IsReadOnly="False" Binding="{Binding TechName}"  Foreground="#F0F0F0"/>

            </DataGrid.Columns>
        </DataGrid>

这是 TokenLookUpEdit 填充代码:

InitializeComponent();
            using (MySqlConnection cn = new MySqlConnection() { ConnectionString = "DataSource='" + DoSomething.Server_Param + "';UserID='" + DoSomething.Uid_Param + "';Password='" + DoSomething.Password_Param + "';Database='" + DoSomething.Database_Param + "';PORT=3306;CHARSET=utf8" })
            {
                using (MySqlCommand cmd = new MySqlCommand() { Connection = cn, CommandText = "SELECT InvoiceNumber,CustomerName FROM Delta_Invoices_Grid " })
                {
                    cn.Open();
                    MySqlDataReader dr = cmd.ExecuteReader();
                    DataTable dt = new DataTable();
                    dt.Load(dr);

                    InvoicesNumbersCombo.ItemsSource = dt.DefaultView;
                    InvoicesNumbersCombo.ValueMember = "CustomerName";
                    InvoicesNumbersCombo.DisplayMember = "InvoiceNumber";


                }
            }

Answer 1

您需要做的第一件事是将 EditValue 绑定(bind)到一个集合，因为您将获得一个行列表并使用 CollectionConverter 并且您需要主要更改集合ObservableCollection 的事件，以便您将获得所选行的列表

Xaml

`EditValue="{Binding SelectedRows, Converter={local:CollectionConverter}}`

转换器

public class CollectionConverter : MarkupExtension, IValueConverter {
        public CollectionConverter() { }

        public override object ProvideValue(IServiceProvider serviceProvider) {
            return this;
        }

        public object Convert(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture) {
            return ((ObservableCollection<Object>)value).ToList<object>();
        }
        public object ConvertBack(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture) {
            return new ObservableCollection<Object>((List<object>)value);
        }

    }

支持

 public ObservableCollection<Order> Orders { get; private set; }
        ObservableCollection<Object> _SelectedRows;
        public ObservableCollection<Object> SelectedRows {
            get { return _SelectedRows; }
            set {
                _SelectedRows.CollectionChanged -= OnSelectedRowsCollectionChanged;
                _SelectedRows.Clear();
                foreach (var item in value)
                    _SelectedRows.Add(item);
                _SelectedRows.CollectionChanged += OnSelectedRowsCollectionChanged;
            }
        }

CTOR

 _SelectedRows = new ObservableCollection<object>();
            _SelectedRows.CollectionChanged += OnSelectedRowsCollectionChanged;

事件

 void OnSelectedRowsCollectionChanged(object sender, System.Collections.Specialized.NotifyCollectionChangedEventArgs e) {
            NotifyPropertyChanged("SelectedRows");