wpf--------------datagrid全选反选 多选进行删除操作 前后台

前台绑定

<DataGrid.Columns>
                    <DataGridTemplateColumn >
                        <DataGridTemplateColumn.HeaderTemplate>
                            <DataTemplate>
                                <CheckBox Click="HeaderCellLoad" Content="全选"   IsChecked="False" Unchecked="UnChoice_Checked" Checked="Choice_Checked"></CheckBox>
                                </DataTemplate>
                        </DataGridTemplateColumn.HeaderTemplate>
                        <DataGridTemplateColumn.CellTemplate>
                            <DataTemplate>
                                <CheckBox Click="checkbox_checked" HorizontalAlignment="Center" x:Name="Choices"  IsChecked="{Binding CHOICE, Mode=TwoWay}" VerticalAlignment="Center" />
                            </DataTemplate>
                        </DataGridTemplateColumn.CellTemplate>
                    </DataGridTemplateColumn>
                    <DataGridTextColumn Header="商品条码" Binding="{Binding commodity_barcode}" Width="20*" HeaderStyle="{StaticResource ColumnHeaderStyle}"/>
                    <DataGridTextColumn Header="商品名称" Binding="{Binding commodity_name}" Width="18*" HeaderStyle="{StaticResource ColumnHeaderStyle}"/>
                    <DataGridTextColumn Header="单位" Binding="{Binding commodity_unit}" Width="10*" HeaderStyle="{StaticResource ColumnHeaderStyle}"/>
                    <DataGridTextColumn Header="规格" Binding="{Binding commodity_rule}" Width="10*" HeaderStyle="{StaticResource ColumnHeaderStyle}"/>
                    <DataGridTextColumn Header="售价" Binding="{Binding commodity_retailprice}" Width="10*" HeaderStyle="{StaticResource ColumnHeaderStyle}" />
                    <DataGridTextColumn Header="会员价" Binding="{Binding commodity_memberprice}" Width="10*" HeaderStyle="{StaticResource ColumnHeaderStyle}"/>
                 <DataGridTemplateColumn Header="操作" Width="10*">
                        <DataGridTemplateColumn.CellTemplate>
                            <DataTemplate>
                                <StackPanel Orientation="Horizontal">
                                    <Button Content="修改"  Click="Update_Click" Margin="15,0,5,0" >
                                        <Button.Template>
                                            <ControlTemplate TargetType="Button">
                                                <TextBlock TextDecorations="Underline" Name="btnInput" >
                                            <ContentPresenter />
                                                </TextBlock>
                                            </ControlTemplate>
                                        </Button.Template>
                                        <Button.Style>
                                            <Style TargetType="Button">
                                                <Setter Property="Foreground" Value="Blue" />
                                                <Style.Triggers>
                                                    <Trigger Property="IsMouseOver" Value="true">
                                                        <Setter Property="Foreground" Value="Red" />
                                                    </Trigger>
                                                </Style.Triggers>
                                            </Style>
                                        </Button.Style>
                                    </Button>
                                    <Button Content="删除" Click="Delete_Click" Margin="15,0,5,0">
                                        <Button.Template>
                                            <ControlTemplate TargetType="Button">
                                                <TextBlock TextDecorations="Underline" Name="btnCancel" >
                                    <ContentPresenter />
                                                </TextBlock>
                                            </ControlTemplate>
                                        </Button.Template>
                                        <Button.Style>
                                            <Style TargetType="Button">
                                                <Setter Property="Foreground" Value="Red" />
                                                <Style.Triggers>
                                                    <Trigger Property="IsMouseOver" Value="true">
                                                        <Setter Property="Foreground" Value="Red" />
                                                    </Trigger>
                                                </Style.Triggers>
                                            </Style>
                                        </Button.Style>
                                    </Button>
                                </StackPanel>
                            </DataTemplate>
                        </DataGridTemplateColumn.CellTemplate>
                    </DataGridTemplateColumn>
                </DataGrid.Columns> 

后台事件

    /// <summary>
        /// Checked UnChecked事件
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void Choice_Checked(object sender, RoutedEventArgs e)
        {
            DataTable dt = ((DataView)CommodityData.ItemsSource).Table;
            foreach (DataRow row in dt.Rows)
            {
                row["CHOICE"] = "";
                GetCount();
            }
        }
        private void UnChoice_Checked(object sender, RoutedEventArgs e)
        {
            DataTable dt = ((DataView)CommodityData.ItemsSource).Table;
            foreach (DataRow row in dt.Rows)
            {
                row["CHOICE"] = "";
                GetCount();
            }
        }
 
        private void checkbox_checked(object sender, RoutedEventArgs e)
        {
            //首先获取DataGridTemplateColumn所在列
            DataGridTemplateColumn tempColumn = this.CommodityData.Columns[] as DataGridTemplateColumn;
            //然后获取DataGridTemplateColumn单元格元素
            FrameworkElement element = this.CommodityData.Columns[].GetCellContent(this.CommodityData.Items[CommodityData.SelectedIndex]);
            if (element != null)
            {
                //把单元格元素转换为相应的控件，再从该控件中取值
                System.Windows.Controls.CheckBox ck = tempColumn.CellTemplate.FindName("Choices", element) as System.Windows.Controls.CheckBox;
                if (ck.IsChecked == true)
                {
                    DataRowView item = CommodityData.Items[CommodityData.SelectedIndex] as DataRowView;
                    DataRow dr = item.Row;
                    dr["CHOICE"] = "";
                    GetCount();
                }
                else if (ck.IsChecked == false)
                {
                    DataRowView item = CommodityData.Items[CommodityData.SelectedIndex] as DataRowView;
                    DataRow dr = item.Row;
                    dr["CHOICE"] = "";
                    GetCount();
                }
            }
        }

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