Question

即使我设置了SelectionMode="Extended"和SelectionUnit="FullRow"，当我调试SelectionChanged事件时，SelectedItems中始终只有一个选定的项目}。

这是我的DataGrid：

<DataGrid Grid.Row="0" AutoGenerateColumns="False" Margin="5,5,5,0"
        Name="dgrMembersClub1" ItemsSource="{Binding .}" CanUserAddRows="False"
        SelectionMode="Extended" SelectionUnit="FullRow" SelectionChanged="Grid_SelectionChanged">
    <DataGrid.Columns>
        <DataGridTemplateColumn Header="Joining" >
            <DataGridTemplateColumn.CellTemplate>
                <DataTemplate>
                    <CheckBox IsChecked="{Binding IsSelected}"/>
                </DataTemplate>
            </DataGridTemplateColumn.CellTemplate>
        </DataGridTemplateColumn>
        <DataGridTextColumn IsReadOnly="True" Header="Surname" Binding="{Binding Surname}" />
        <DataGridTextColumn IsReadOnly="True" Header="Name" Binding="{Binding Name}" />
        <DataGridTextColumn IsReadOnly="True" Header="Club" Binding="{Binding Club_Id, Converter={StaticResource ClubName}}" />
        <DataGridTextColumn IsReadOnly="True" Header="City" Binding="{Binding City}" />
    </DataGrid.Columns>
</DataGrid>

我的Grid_SelectionChanged事件：

private void Grid_SelectionChanged(object sender, SelectionChangedEventArgs e)
{
    DataGrid grid = (DataGrid)sender;
    var test = grid.SelectedItems; //Count == 1 (always)
}

我确实设置了触发器（在App.xaml中），用于更改选定行和交替行的背景和前景画笔。如果相关，请告诉我，我会添加代码。

*编辑*

虽然您正在使用它，但我可以使用一些帮助来获取单元格模板中的复选框。非常好请:)）

Answer 1

DataGrid的SelectedItems属性包含一系列精选的项目......

private void DataGrid_SelectionChanged(object sender,
    SelectionChangedEventArgs e)
{
    // ... Get SelectedItems from DataGrid.
    var grid = sender as DataGrid;
    var selected = grid.SelectedItems;

    foreach (var item in selected)
    {
        var dog = item as Dog;
    }
}

这个指示性事件处理程序获取SelectedItems并循环遍历它。

然而，有一点需要注意：

“如果SelectionMode属性设置为Single，则为SelectedItems list将只包含SelectedItem属性值。“

来源：http://msdn.microsoft.com/en-us/library/system.windows.controls.datagrid.selecteditems(v=vs.95).aspx

SelectedItems属性继承自IList，因此可以对其进行强制转换并对其执行LINQ操作。它也适用于非连续选择。

http://www.dotnetperls.com/datagrid

的更多提示

Answer 2

private IEnumerable<DataGridRow> GetDataGridRows(DataGrid grid)
{
    var itemsSource = grid.ItemsSource as IEnumerable;
    if (null == itemsSource) yield return null;
    foreach (var item in itemsSource)
    {
        var row = grid.ItemContainerGenerator.ContainerFromItem(item) as DataGridRow;
        if (null != row & row.IsSelected) yield return row;
    }
}

private void Button_Click(object sender, RoutedEventArgs e)
{
    var rows = GetDataGridRows(dgv_Students);
    string id; //Sample =>"85-999888-2"
    foreach (DataGridRow dr in rows)
    {
        id = (dr.Item as tbl_student).code_meli;
        MessageBox.Show(id);
    }
}

无法在WPF DataGrid中选择多个行

2 个答案: