回答編集履歴
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指摘していただいたデッドロックを回避する例を追記
test
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@@ -65,3 +65,103 @@
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```
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ご指摘いただいた通りデッドロックしたため、Windowsフォーム版の例を追記しておきます。
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```C#
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using System;
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using System.Collections.Generic;
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using System.ComponentModel;
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using System.Data;
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using System.Drawing;
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using System.Linq;
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using System.Text;
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using System.Threading;
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using System.Threading.Tasks;
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using System.Windows.Forms;
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namespace MultiTaskIncrement {
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public partial class Form1 : Form {
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public Form1() {
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InitializeComponent();
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}
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int num = 0;
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int max = 0;
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public async Task<int> ConvertFile(string in_path, string out_path) {
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return await Task.Run(() => {
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var r = new Random();
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var t = r.Next(500, 1000);
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System.Threading.Thread.Sleep(t);
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this.Invoke((MethodInvoker)delegate() {
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listBox1.Items.Add("[" + (Interlocked.Increment(ref num)) + "/" + max + "] " + in_path + " " + out_path + " " + t);
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});
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return 1;
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});
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}
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private async void button1_Click(object sender, EventArgs e) {
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num = 0;
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max = 300;
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List<Task<int>> tasklist = new List<Task<int>>();
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for (int i = 0; i < max; i++) {
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tasklist.Add(ConvertFile("aaa" + i, "bbb"));
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}
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await Task.Run(() => {
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Task.WaitAll(tasklist.ToArray());
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});
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MessageBox.Show("owari");
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}
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}
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}
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```
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