<Window x:Class="WpfApp5.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
        xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
        xmlns:local="clr-namespace:WpfApp5"
        mc:Ignorable="d"
        Title="MainWindow" Height="450" Width="800" Loaded="Window_Loaded">
    <Grid>
        <DataGrid Name="dataGrid" AutoGenerateColumns="True" Background="Transparent" Margin="5">

        </DataGrid>
    </Grid>
</Window>

using System.Data;
using System.Windows;


namespace WpfApp5
{
    /// <summary>
    /// MainWindow.xaml 的交互逻辑
    /// </summary>
    public partial class MainWindow : Window
    {
        public MainWindow()
        {
            InitializeComponent();
        }
        private void Window_Loaded(object sender, RoutedEventArgs e)
        {
        //顺序是新建对bai象-->新建列du-->新建行，示例代码如下：
            DataTable dt = new DataTable();            //新建对象
            dt.Columns.Add("姓名", typeof(string));   //新建第一du列
            dt.Columns.Add("年龄", typeof(int));      //新建第二列
            dt.Rows.Add("张三", 23);                 //新建第一行，并赋值
            dt.Rows.Add("李四", 25);                 //新建第二行，并赋值
            dataGrid.ItemsSource = dt.DefaultView;//将数据源显示到dataGrid控件上
        }
    }
}

 <DataGrid x:Name="DATA_GRID" ItemsSource="{Binding}" AutoGenerateColumns="False" Grid.Row="0" Grid.Column="1" Background="LightGray" Margin="10">
                    <DataGrid.Columns>
                    <DataGridTextColumn Header="姓名" Binding="{Binding 姓名}"/>
                    <DataGridTextColumn Header="年龄" Binding="{Binding 年龄}"/>
                </DataGrid.Columns>
            </DataGrid>