【WinForms】DataGridView自动调整列宽度以及最后一列宽度填充

直接上代码。

using System;
using System.Data;
using System.Linq;
using System.Reflection;
using System.Windows.Forms;

namespace DataGridViewTest
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void Form1_Load(object sender, EventArgs e)
        {
            // 数据量很大时，开启双缓冲绘制可以明显提高表格绘制速度，减少拖动滚动条时卡顿
            typeof(DataGridView).InvokeMember("DoubleBuffered", BindingFlags.NonPublic | BindingFlags.Instance | BindingFlags.SetProperty, null, dataGridView1, new object[] { true });

            // 禁止添加行
            dataGridView1.AllowUserToAddRows = false;
            // 禁止删除行
            dataGridView1.AllowUserToDeleteRows = false;
            // 禁止排序列
            dataGridView1.AllowUserToOrderColumns = false;
            // 禁止调整列宽
            dataGridView1.AllowUserToResizeColumns = false;
            // 禁止调整行高
            dataGridView1.AllowUserToResizeRows = false;
            // 隐藏行头
            dataGridView1.RowHeadersVisible = false;
            // 整行选择
            dataGridView1.SelectionMode = DataGridViewSelectionMode.FullRowSelect;
            // 禁止编辑
            dataGridView1.ReadOnly = true;
            // 自动调整列宽
            dataGridView1.AutoSizeColumnsMode = DataGridViewAutoSizeColumnsMode.DisplayedCells;
            // 当DataSource赋值时自动生成对应的列(此属性默认为True)
            dataGridView1.AutoGenerateColumns = true;
        }

        private static readonly Random _random = new Random();

        private static Record MakeRecord(int index)
        {
            return new Record
            {
                Id = index,
                InputVoltage = (float)_random.Next(490, 510) / 100,
                InputCurrent = (float)_random.Next(990, 1190) / 1000,
                OutputVoltage = (float)_random.Next(490, 510) / 100,
                OutputCurrent = (float)_random.Next(990, 1190) / 1000,
                Efficiency = (float)_random.Next(8000, 9000) / 100,
                Step = 1,
                Time = DateTime.Now
            };
        }

        private void button1_Click(object sender, EventArgs e)
        {
            // 生成50000条数据
            Record[] data = Enumerable.Range(1, 50000).Select(MakeRecord).ToArray();

            // 赋值数据源，根据设置，自动生成所有对应的列
            dataGridView1.DataSource = data;

            // 设置最后一列宽度填满控件
            DataGridViewColumn column = dataGridView1.Columns.GetLastColumn(DataGridViewElementStates.Visible, DataGridViewElementStates.None);
            if (column != null)
            {
                column.AutoSizeMode = DataGridViewAutoSizeColumnMode.Fill;
            }
        }
    }

    class Record
    {
        public int Id { get; set; }
        public float InputVoltage { get; set; }
        public float InputCurrent { get; set; }
        public float OutputVoltage { get; set; }
        public float OutputCurrent { get; set; }
        public float Efficiency { get; set; }
        public int Step { get; set; }
        public DateTime Time { get; set; }
    }
}