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C# : Visual Studio で気軽に前回値の保存と復元を行う方法

Posted at

■目的

フォーム内で入力した値を保存して、再起動したときに値を復元させたい

■準備

適当なフォームを作ります(プロジェクト名:Hoge、フォーム名:Form1)

image

保存させるコントロール

  • txtHogeString という名前のTextBox(上段)
  • txtHogeInt という名前のTextBox(下段)

■入力した値を保存する変数を定義

ソリューションエクスプローラー > Hogeのプロパティ > 設定

名前 スコープ
HozonString string ユーザー
HozonInt int ユーザー 0

image

■クローズイベント(保存処理)の作成

Hoge.Form1.cs
private void Form1_FormClosing(object sender, FormClosingEventArgs e)
{
	Properties.Settings.Default.HozonString = this.txtHogeString.Text;
	Properties.Settings.Default.HozonInt = int.Parse(this.txtHogeInt.Text);
	Properties.Settings.Default.Save();
}

■ロードイベント(復元処理)の作成

Hoge.Form1.cs
private void Form1_Load(object sender, EventArgs e)
{
	this.txtHogeString.Text = Properties.Settings.Default.HozonString;
	this.txtHogeInt.Text = Properties.Settings.Default.HozonInt.ToString();
}

■完成

実行 > 適当な値を入力 > 閉じる > 実行 = (ヽ´ω`)

image

値はデフォならこの辺に保存されている↓

C:\Users\{User名}\AppData\Local\Hoge\...\1.0.0.0\user.config

■コード全体

Hoge.Form1.cs
using System;
using System.Windows.Forms;

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

		private void Form1_Load(object sender, EventArgs e)
		{
			this.txtHogeString.Text = Properties.Settings.Default.HozonString;
			this.txtHogeInt.Text = Properties.Settings.Default.HozonInt.ToString();
		}

		private void Form1_FormClosing(object sender, FormClosingEventArgs e)
		{
			Properties.Settings.Default.HozonString = this.txtHogeString.Text;
			Properties.Settings.Default.HozonInt = int.Parse(this.txtHogeInt.Text);
			Properties.Settings.Default.Save();
		}
	}
}
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