在后面的C#代码中设置网格列或网格行

using System.Windows;
using System.Windows.Controls;

namespace WpfApp
{
    public partial class MainWindow : Window
    {
        public MainWindow()
        {
            InitializeComponent();

            // 创建一个Grid控件
            Grid grid = new Grid();

            // 定义网格的列
            ColumnDefinition column1 = new ColumnDefinition();
            ColumnDefinition column2 = new ColumnDefinition();
            ColumnDefinition column3 = new ColumnDefinition();

            // 设置列的宽度
            column1.Width = new GridLength(100);
            column2.Width = new GridLength(200);
            column3.Width = new GridLength(150);

            // 将列添加到网格中
            grid.ColumnDefinitions.Add(column1);
            grid.ColumnDefinitions.Add(column2);
            grid.ColumnDefinitions.Add(column3);

            // 定义网格的行
            RowDefinition row1 = new RowDefinition();
            RowDefinition row2 = new RowDefinition();
            RowDefinition row3 = new RowDefinition();

            // 设置行的高度
            row1.Height = new GridLength(50);
            row2.Height = new GridLength(100);
            row3.Height = new GridLength(75);

            // 将行添加到网格中
            grid.RowDefinitions.Add(row1);
            grid.RowDefinitions.Add(row2);
            grid.RowDefinitions.Add(row3);

            // 将网格添加到窗口中
            Content = grid;
        }
    }
}