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Windowsフォームアプリケーションの非同期処理

Posted at

別スレッドからフォームを更新するにはInvokeを使うらしい。Invokeとかラムダ式とか馴染みがなかったけど、今回サンプルを動かして感じが掴めたのでメモしとく。

サンプルソース

using System;
using System.Threading.Tasks;
using System.Windows.Forms;

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

        private Task t;
        private void Form1_Load(object sender, EventArgs e)
        {
            t = new Task(() =>
            {
                for (;;)
                {
                    Action a = () =>
                    {
                        label1.Text = DateTime.Now.Second.ToString();
                    };
                    Invoke(a);
                    System.Threading.Thread.Sleep(1000);
                }
            });
            t.Start();
        }
    }
}

参考文献

川俣晶著 C#ショートコードプログラミング http://goo.gl/EblJNn

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