在启用分组的 WPF 数据网格编辑中出现问题

Question

Datagrid xaml 代码：

  <controls:DataGrid Name="dataGrid" AutoGenerateColumns="False" >
    <controls:DataGrid.GroupStyle>
        <GroupStyle>
            <GroupStyle.HeaderTemplate>
                <DataTemplate>
                    <StackPanel>
                        <TextBlock Text="{Binding Path=Name}" />
                     </StackPanel>
                </DataTemplate>
            </GroupStyle.HeaderTemplate>
        </GroupStyle>
    </controls:DataGrid.GroupStyle>

        <controls:DataGrid.Columns>
            <controls:DataGridTextColumn Header="Student ID"  Width="90*" MinWidth="120" Binding="{Binding StudentId}"/>
            <controls:DataGridTextColumn Header="Student Name" Width="90*" MinWidth="120" Binding="{Binding Name}"/>
            <controls:DataGridTextColumn Header="Score" Width="100*" MinWidth="150" Binding="{Binding Score}"/>
        </controls:DataGrid.Columns>
    </controls:DataGrid>

这里是背后的代码：

    void LoadDatagrid()
    {
        List<Student> _studentList = new List<Student>();

        _studentList.Add(new Student()
        {
            StudentId = 1,
            Name = "Paul Henriot",
            Department = "IT",
            Score = 540
        });

        _studentList.Add(new Student()
        {
            StudentId = 2,
            Name = "John Doe",
            Department = "IT",
            Score = 620
        });

        _studentList.Add(new Student()
        {
            StudentId = 3,
            Name = "Aria Cruz",
            Department = "ME",
            Score = 840
        });


        _studentList.Add(new Student()
        {
            StudentId = 4,
            Name = "Yoshi Latimer",
            Department = "ME",
            Score = 450
        });



        CollectionViewSource viewSource = new CollectionViewSource();
        viewSource.GroupDescriptions.Add(new PropertyGroupDescription("Department"));
        viewSource.Source = _studentList; ;
        dataGrid.ItemsSource = viewSource.View;
    }

  public class Student
    {
        public int StudentId{ get; set; }
        public string Name { get; set; }
        public string Department { get; set; }
        public int Score { get; set; }
    }

当我尝试编辑第一个部门中的分数或名称时，编辑该行后跳到下。

在这方面需要帮助。

Answer 1

我认为你的代码是错误的，GroupStyle的绑定路径应该是“Department”，而不是“Name”。

将您的代码从： 更改

        <GroupStyle>
            <GroupStyle.HeaderTemplate>
                <DataTemplate>
                    <StackPanel>
                        <TextBlock Text="{Binding Path=Name}" />
                    </StackPanel>
                </DataTemplate>
            </GroupStyle.HeaderTemplate>
        </GroupStyle>

为：

        <GroupStyle>
            <GroupStyle.HeaderTemplate>
                <DataTemplate>
                    <StackPanel>
                        <TextBlock Text="{Binding Path=Department}" />
                    </StackPanel>
                </DataTemplate>
            </GroupStyle.HeaderTemplate>
        </GroupStyle>

它应该可以正常工作。

Answer 2

这解决了我的问题，我已将 SortDescription 添加到 CollectionViewSource 中。

        CollectionViewSource viewSource = new CollectionViewSource();
        viewSource.GroupDescriptions.Add(new PropertyGroupDescription("Department"));
        viewSource.SortDescriptions.Add(new System.ComponentModel.SortDescription("Department", System.ComponentModel.ListSortDirection.Ascending));
        viewSource.SortDescriptions.Add(new System.ComponentModel.SortDescription("StudentId", System.ComponentModel.ListSortDirection.Ascending));
        viewSource.Source = _studentList; ;
        dataGrid.ItemsSource = viewSource.View;