datagridview-enter-key-move-next ソースコード全文

<Solution>
  <Project Path="DataGridView_EnterRightClick/DataGridView_EnterRightClick.csproj" />
</Solution>

<Project Sdk="Microsoft.NET.Sdk">

  <PropertyGroup>
    <OutputType>WinExe</OutputType>
    <TargetFramework>net10.0-windows</TargetFramework>
    <Nullable>enable</Nullable>
    <UseWindowsForms>true</UseWindowsForms>
    <ImplicitUsings>enable</ImplicitUsings>
  </PropertyGroup>

</Project>

<?xml version="1.0" encoding="utf-8"?>
<Project ToolsVersion="Current" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
    <ItemGroup>
        <Compile Update="Form1.cs">
            <SubType>Form</SubType>
        </Compile>
    </ItemGroup>
</Project>

using System.Data;

namespace DataGridView_EnterRightClick;

public partial class Form1 : Form
{
    private DataTable _dataTable = new DataTable();

    public Form1()
    {
        InitializeComponent();
        InitializeData();
        InitializeDataGridView();
    }

    private void InitializeData()
    {
        // テストデータの準備（ID、商品名、価格）
        _dataTable.Columns.Add("ID", typeof(string));
        _dataTable.Columns.Add("Name", typeof(string));
        _dataTable.Columns.Add("Price", typeof(int));

        _dataTable.Rows.Add("P001", "ノートパソコン", 120000);
        _dataTable.Rows.Add("P002", "USBメモリ", 2500);
        _dataTable.Rows.Add("P003", "液晶モニター", 35000);
    }

    private void InitializeDataGridView()
    {
        dataGridView1.DataSource = _dataTable;
        dataGridView1.AutoSizeColumnsMode = DataGridViewAutoSizeColumnsMode.Fill;
    }

    /// <summary>
    /// フォーム全体のコマンドキー入力を先行して受け取るメソッド
    /// </summary>
    protected override bool ProcessCmdKey(ref Message msg, Keys keyData)
    {
        // 1. 押されたキーが「Enter キー」であるかチェック
        if ((keyData & Keys.KeyCode) == Keys.Enter)
        {
            // 2. 現在 DataGridView を入力中（フォーカスがある）かチェック
            if (dataGridView1.Focused || dataGridView1.IsCurrentCellInEditMode)
            {
                // 3. Enter の代わりに、Tab キー（横移動）の入力をシステムに送る
                SendKeys.Send("{TAB}");

                // 4. true を返すことで、本来の「下へ移動する挙動」をキャンセルする
                return true;
            }
        }

        // Enter キー以外、または DataGridView 以外の場所での入力は標準の動きに任せる
        return base.ProcessCmdKey(ref msg, keyData);
    }
}

namespace DataGridView_EnterRightClick
{
    partial class Form1
    {
        /// <summary>
        ///  Required designer variable.
        /// </summary>
        private System.ComponentModel.IContainer components = null;

        /// <summary>
        ///  Clean up any resources being used.
        /// </summary>
        /// <param name="disposing">true if managed resources should be disposed; otherwise, false.</param>
        protected override void Dispose(bool disposing)
        {
            if (disposing && (components != null))
            {
                components.Dispose();
            }
            base.Dispose(disposing);
        }

        #region Windows Form Designer generated code

        /// <summary>
        ///  Required method for Designer support - do not modify
        ///  the contents of this method with the code editor.
        /// </summary>
        private void InitializeComponent()
        {
            dataGridView1 = new DataGridView();
            ((System.ComponentModel.ISupportInitialize)dataGridView1).BeginInit();
            SuspendLayout();
            //
            // dataGridView1
            //
            dataGridView1.ColumnHeadersHeightSizeMode = DataGridViewColumnHeadersHeightSizeMode.AutoSize;
            dataGridView1.Dock = DockStyle.Fill;
            dataGridView1.Location = new Point(0, 0);
            dataGridView1.Name = "dataGridView1";
            dataGridView1.RowHeadersWidth = 62;
            dataGridView1.Size = new Size(800, 450);
            dataGridView1.TabIndex = 0;
            //
            // Form1
            //
            AutoScaleDimensions = new SizeF(10F, 25F);
            AutoScaleMode = AutoScaleMode.Font;
            ClientSize = new Size(800, 450);
            Controls.Add(dataGridView1);
            Name = "Form1";
            Text = "Form1";
            ((System.ComponentModel.ISupportInitialize)dataGridView1).EndInit();
            ResumeLayout(false);
        }

        #endregion

        private DataGridView dataGridView1;
    }
}

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namespace DataGridView_EnterRightClick
{
    internal static class Program
    {
        /// <summary>
        ///  The main entry point for the application.
        /// </summary>
        [STAThread]
        static void Main()
        {
            // To customize application configuration such as set high DPI settings or default font,
            // see https://aka.ms/applicationconfiguration.
            ApplicationConfiguration.Initialize();
            Application.Run(new Form1());
        }
    }
}