WPF 问题总结之 CheckBox 全选

最近在做WPF项目，遇到很多问题。

1，DataGrid 全选 Checkbox           

    <DataGrid Name="dgrdAverageWage" AutoGenerateColumns="True" Height="524" Margin="11,0,24,43"  VerticalAlignment="Bottom" SelectionMode="Extended" SelectionUnit="Cell"
                      RowDetailsVisibilityMode="VisibleWhenSelected"
                      EnableRowVirtualization="False"    //关闭虚拟行 要不 GetCellContent 方法会得到空值
                      Grid.Column="1" LoadingRow="dgrdAverageWage_LoadingRow">
                <DataGrid.Columns>       

                    <DataGridTemplateColumn Header="选择" CanUserReorder="False">
                        <DataGridTemplateColumn.CellTemplate>
                            <DataTemplate>
                                <CheckBox Name="cb"  IsChecked="{Binding IsChecked, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}" Cursor="Hand"/>
                            </DataTemplate>
                        </DataGridTemplateColumn.CellTemplate>
                    </DataGridTemplateColumn>
                </DataGrid.Columns>
            </DataGrid>

foreach (var item in dgrdAverageWage.Items)
{
DataGridTemplateColumn templeColumn = dgrdAverageWage.Columns[0] as DataGridTemplateColumn;
FrameworkElement fwElement = dgrdAverageWage.Columns[0].GetCellContent(item);
if (fwElement != null)
{
CheckBox cBox = templeColumn.CellTemplate.FindName("cb", fwElement) as CheckBox;
if (cBox != null)
{
cBox.IsChecked = _bSelect;
}
else
{
}
}
else
{
}
}
if (_bSelect)
{
btnSelect.Content = "全未选(&A)";
_bSelect = false;
//dgrdAverageWage.SelectAll();
}
else
{
btnSelect.Content = "全选(&A)";
_bSelect = true;
//dgrdAverageWage.UnselectAll();
}

最后

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