WPF Datagrid如何取出某一列的所有值？

Question

 <DataGrid x:Name="dgTI" DockPanel.Dock="Top" AutoGenerateColumns="False">
                            <DataGrid.Columns>
                                <DataGridTextColumn Header="序号" Width="80"  CanUserSort="False" CanUserResize="False"/>
                                <DataGridTextColumn Header="TI" Width="100"  CanUserSort="False" CanUserResize="False"/>
                                <DataGridTextColumn Header="符号" Width="100" CanUserSort="False" CanUserResize="False"/>
                            </DataGrid.Columns>
</DataGrid>

1.如何在后台代码中向dgTI添加数据？

2.如何提取dgTI中第二列的所有数据？只能用for循环么？

Answer 1

Hi Shannon Zhou,

建议你对DataGridTextColumn上加上绑定，这样做更加方便

1.如何在后台代码中向dgTI添加数据？

直接对ItemSource赋值即可。

2.如何提取dgTI中第二列的所有数据？只能用for循环么？

暂时没有更好的方法。

我的代码：

XAML：

        <DataGrid x:Name="GridView" AutoGenerateColumns="False">
            <DataGrid.Columns>
                <DataGridTextColumn Header="Name" Width="80" Binding="{Binding Name}" CanUserSort="False" CanUserResize="False"/>
                <DataGridTextColumn Header="ID" Width="100" Binding="{Binding ID}" CanUserSort="False" CanUserResize="False"/>
                <DataGridTextColumn Header="Date" Width="100" Binding="{Binding Date}" CanUserSort="False" CanUserResize="False"/>
            </DataGrid.Columns>
        </DataGrid>

cs

        private void OnLoaded(object sender, RoutedEventArgs e)
        {
            var items = new List<Item>();
            items.Add(new Item() { Name = "Lee", ID = 0, Date = DateTime.Today });
            items.Add(new Item() { Name = "Glen", ID = 1, Date = DateTime.Today.AddDays(1) });
            items.Add(new Item() { Name = "Maxim", ID = 2, Date = DateTime.Today.AddDays(-1) });
            items.Add(new Item() { Name = "Yana", ID = 3, Date = DateTime.Today.AddDays(2) });
            GridView.ItemsSource = items;
        }

    public class Item
    {
        public string Name { get; set; }
        public int ID { get; set; }
        public DateTime Date { get; set; }
    }

Best wishes,
Lee

Answer 2

Hi,

>>1.如何在后台代码中向dgTI添加数据？

你应该绑定一个集合到DataGrid的ItemSource属性上，Lee的方案很好,但是你最好使用ObsercableCollection<T>，当ObservableCollection<T>添加一行时，会自动通知绑定该ObservableCollection<T>的控件并做相应修改。

>>2.如何提取dgTI中第二列的所有数据？只能用for循环么？

http://blog.csdn.net/honantic/article/details/49509641

 public  DataGridRow GetRow( DataGrid dataGrid, int rowIndex)
        {
            DataGridRow rowContainer = (DataGridRow)dataGrid.ItemContainerGenerator.ContainerFromIndex(rowIndex);
            if (rowContainer == null)
            {
                dataGrid.UpdateLayout();
                dataGrid.ScrollIntoView(dataGrid.Items[rowIndex]);
                rowContainer = (DataGridRow)dataGrid.ItemContainerGenerator.ContainerFromIndex(rowIndex);
            }
            return rowContainer;
        }

获取第二行对应的对象:

 Student stu = (Student)GetRow(dataGrid, 2)?.DataContext;

Best Regards,

Bob

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