WPF datagrid 动态增加列

DataGrid动态增加列

 

<Window x:Class="WpfApplication1.MainWindow"

        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"

        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"

        Title="MainWindow" Height="350" Width="525">

    <Grid>

        <Grid.RowDefinitions>

            <RowDefinition Height="Auto"/>

            <RowDefinition Height="*"/>

        </Grid.RowDefinitions>

        <StackPanel Orientation="Horizontal">

            <Button Content="Add Column" Click="AddColumn_Click" Margin="5"/>

            <Button Content="Add Data" Click="AddData_Click" Margin="5"/>

        </StackPanel>

        <DataGrid x:Name="dataGrid" AutoGenerateColumns="True" Grid.Row="1"/>

    </Grid>

</Window>

 

using System;

using System.Collections.Generic;

using System.Collections.ObjectModel;

using System.Dynamic;

using System.Windows;

using System.Windows.Controls;

using System.Windows.Data;



namespace WpfApplication1

{

    /// <summary>

    /// MainWindow.xaml 的交互逻辑

    /// </summary>

    public partial class MainWindow : Window

    {

        ObservableCollection<ExpandoObject> items = new ObservableCollection<ExpandoObject>();

        public MainWindow()

        {

            InitializeComponent();

            for (int i = 0; i < 5; i++)

            {

                dynamic item = new ExpandoObject();

                item.A = "Property A value - " + i.ToString();

                item.B = "Property B value - " + i.ToString();

                items.Add(item);

            }



            dataGrid.Columns.Add(new DataGridTextColumn() { Header = "A", Binding = new Binding("A") });

            dataGrid.Columns.Add(new DataGridTextColumn() { Header = "B", Binding = new Binding("B") });

            dataGrid.ItemsSource = items;

        }



        private void AddData_Click(object sender, RoutedEventArgs e)

        {

            dynamic item = new ExpandoObject();

            item.A = "New Item - A";

            item.B = "New Item - B";

            items.Add(item);

        }



        int newColumnIndex = 1;

        private void AddColumn_Click(object sender, RoutedEventArgs e)

        {

            foreach (IDictionary<String, Object> item in items)

            {

                item.Add("NewColumn" + newColumnIndex, "New Column Value - " + newColumnIndex.ToString());

            }



            dataGrid.Columns.Add(new DataGridTextColumn() { Header = "New Column" + newColumnIndex, Binding = new Binding("NewColumn" + newColumnIndex) });



            newColumnIndex++;

        }

    }

}

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