三、WPF 全选，反选，以及获取选中行

页面代码

　　　　　　　<TextBlock>   
                <CheckBox Name="cbAllCreate" Click="CbAllCreate_Click">All</CheckBox> 
                <CheckBox Name="cbInverseCreate" Click="CbInverseCreate_Click">Inverse</CheckBox>
            </TextBlock>
            <DataGrid Name="dgCreateTable" AutoGenerateColumns="False" VerticalScrollBarVisibility="Visible" Height="210" EnableRowVirtualization="False">
                <DataGrid.Columns>
                    <DataGridCheckBoxColumn Header="Chose" ></DataGridCheckBoxColumn>
                    <DataGridTextColumn Header="Name"   Binding="{Binding}" IsReadOnly="True"></DataGridTextColumn>
                </DataGrid.Columns>
            </DataGrid>

注：如果不加 EnableRowVirtualization="False"  全选反选会有遗漏的情况，所以一定要加上。

代码　　

  　　　 /// <summary>
        /// 全选
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void CbAllCreate_Click(object sender, RoutedEventArgs e)
        {
            CbAll(dgCreateTable, cbAllCreate);

        }
        /// <summary>
        /// 反选
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void CbInverseCreate_Click(object sender, RoutedEventArgs e)
        {
            Inverse(dgCreateTable, cbInverseCreate);
        }
  　　　 /// <summary>
        /// 全选
        /// </summary>
        /// <param name="dg"></param>
        /// <param name="cb"></param>
        void CbAll(DataGrid dg, CheckBox cb)
        {
            dg.IsEnabled = cb.IsChecked != true;

            for (int i = 0; i < dg.Items.Count; i++)
            {
                DataGridRow neddrow = (DataGridRow)dg.ItemContainerGenerator.ContainerFromIndex(i);
                //获取该行的某列
                if (neddrow != null)
                {
                    FrameworkElement objElement = dg.Columns[0].GetCellContent(neddrow);
                    if (objElement != null)
                    {
                        CheckBox objChk = (CheckBox)objElement;
                        objChk.IsChecked = cb.IsChecked;
                    }
                }
            }
        }
        /// <summary>
        /// 反选
        /// </summary>
        /// <param name="dg"></param>
        /// <param name="cb"></param>
        void Inverse(DataGrid dg, CheckBox cb)
        {
            // cb.IsChecked = false;
            for (int i = 0; i < dg.Items.Count; i++)
            {
                DataGridRow neddrow = (DataGridRow)dg.ItemContainerGenerator.ContainerFromIndex(i);
                //获取该行的某列
                if (neddrow != null)
                {
                    FrameworkElement objElement = dg.Columns[0].GetCellContent(neddrow);
                    if (objElement != null)
                    {
                        CheckBox objChk = (CheckBox)objElement;
                        objChk.IsChecked = !objChk.IsChecked;
                    }
                }
            }
        }

获取datagrid中选中的行

 List<string> GetDataGridList(DataGrid dg)
        {
            List<string> list = new List<string>();
            for (int i = 0; i < dg.Items.Count; i++)
            {
                DataGridRow neddrow = (DataGridRow)dg.ItemContainerGenerator.ContainerFromIndex(i);
                //获取该行的某列
                if (neddrow == null)
                    continue;
                FrameworkElement objElement = dg.Columns[0].GetCellContent(neddrow);
                if (objElement == null)
                    continue;

                CheckBox objChk = (CheckBox)objElement;
                if (objChk.IsChecked != true)
                    continue;

                var obj = dg.Columns[1].GetCellContent(neddrow);
                if (obj == null)
                    continue;
                var tb = (TextBlock)obj;
                if (!string.IsNullOrEmpty(tb.Text))
                {
                    list.Add(tb.Text);
                }
            }
            return list;
        }