WPF DataGrid使用 自动显示行号、全选、三级联动、拖拽

1.DataGrid的使用自动显示行号(修复删除行时行号显示不正确) dgTool.LoadingRow += new EventHandlerDataGridRowEventArgs (dgTool_LoadingRow); dgTool.UnloadingRow += new EventHandlerDataGridRowEventArgs (dgTool_UnloadingRow); void dgTool_LoadingRow( object sender, DataGridRowEventArg

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　　1.DataGrid的使用自动显示行号(修复删除行时行号显示不正确)

 dgTool.LoadingRow += new EventHandler<DataGridRowEventArgs>(dgTool_LoadingRow);        dgTool.UnloadingRow +=new EventHandler<DataGridRowEventArgs>(dgTool_UnloadingRow);        void dgTool_LoadingRow(object sender, DataGridRowEventArgs e)        {            e.Row.Header = e.Row.GetIndex() + 1;        }        void dgTool_UnloadingRow(object sender, DataGridRowEventArgs e)        {            dgTool_LoadingRow(sender, e);            if (dgTool.Items != null)            {                for (int i = 0; i < dgTool.Items.Count; i++)                {                    try                    {                        DataGridRow row = dgTool.ItemContainerGenerator.ContainerFromIndex(i) as DataGridRow;                        if (row != null)                        {                            row.Header = (i + 1).ToString();                        }                    }                    catch { }                }            }        }

　　2.DataGrid新建一行，并为需要的单元格提供默认值

dgTool.InitializingNewItem += new InitializingNewItemEventHandler(dgTool_InitializingNewItem); dgTool.RowEditEnding += new EventHandler<DataGridRowEditEndingEventArgs>(dgTool_RowEditEnding); private void dgTool_InitializingNewItem(object sender, InitializingNewItemEventArgs e)        {            //这里的实体为你绑定数据源中的实体类型            EntityType newItem = e.NewItem as EntityType;            newItem.ID = dgTool.Items.Count - 2;        }        //这里是为了解决添加完成一行数据之后,行号显示不正确（当然还可以做其他操作)        void dgTool_RowEditEnding(object sender, DataGridRowEditEndingEventArgs e)        {            if (dgTool.Items != null)            {                for (int i = 0; i < dgTool.Items.Count; i++)                {                    try                    {                        DataGridRow row = dgTool.ItemContainerGenerator.ContainerFromIndex(i) as DataGridRow;                        if (row != null)                        {                            row.Header = (i + 1).ToString();                        }                    }                    catch { }                }            }        }

　　3.DataGrid实现全选和单选

　　1)DataGrid绑定数据实体类Entity

public class Entity : INotifyPropertyChanged    {        //标记是否删除        private bool isChecked = false;        public bool IsChecked        {            get            {                return isChecked;            }            set            {                isChecked = value;                NotifyPropertyChanged("IsChecked");            }        }        //序号        private int id = 0;        public int ID        {            get { return id; }            set            {                id = value;                NotifyPropertyChanged("ID");            }        }        public event PropertyChangedEventHandler PropertyChanged;        public void NotifyPropertyChanged(string propertyName)        {            PropertyChangedEventHandler handler = PropertyChanged;            if (handler != null)            {                handler(this, new PropertyChangedEventArgs(propertyName));            }        }    }

　　2)前台界面XAML

 <DataGrid x:Name="dgTool" Grid.Row="2"  SelectionChanged="dgTool_SelectionChanged"  RowHeaderWidth="50" FontFamily="Microsoft YaHei" FontSize="16" FontWeight="Normal" SelectionMode="Single"  AutoGenerateColumns="False" CanUserAddRows="True" CanUserDeleteRows="True" IsReadOnly="False" CanUserSortColumns="False"  AlternatingRowBackground="LightGray">            <DataGrid.ColumnHeaderStyle>                <Style TargetType="DataGridColumnHeader">                    <Setter Property="HorizontalContentAlignment" Value="Center">                    </Setter>                </Style>            </DataGrid.ColumnHeaderStyle>            <DataGrid.Columns>                <DataGridTemplateColumn>                    <DataGridTemplateColumn.Header>                        <CheckBox Name="selectAll_checkBox" Content="全选" IsThreeState="True"   HorizontalAlignment="Center" Click="selectAll_checkBox_Click" />                    </DataGridTemplateColumn.Header>                    <DataGridTemplateColumn.CellTemplate>                        <DataTemplate>                            <CheckBox Name="select_checkBox"  IsChecked="{Binding Path=IsChecked}"  Click="select_checkBox_Click"/>                        </DataTemplate>                    </DataGridTemplateColumn.CellTemplate>                </DataGridTemplateColumn>                <DataGridTextColumn Header="ID" Width="*" Binding="{Binding Path=ID}"/>            </DataGrid.Columns>        </DataGrid>