回答編集履歴
2
コメント追加
answer
CHANGED
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@@ -226,10 +226,10 @@
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private void FormC_FormClosing(object sender, FormClosingEventArgs e)
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{
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if (e.CloseReason == CloseReason.UserClosing)
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if (e.CloseReason == CloseReason.UserClosing) // ユーザーが閉じようとしたら...
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{
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e.Cancel = true;
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e.Cancel = true; // 閉じるのを中止して
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Hide();
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Hide(); // 非表示にする
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}
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}
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}
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1
単一化サンプル追記
answer
CHANGED
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@@ -104,4 +104,135 @@
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そのため「スタートボタン」を押すたび、１ずつ・２ずつ・３ずつ...とカウントアップ数が増えていきます。
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こういった方法で都度newしなければ、そのあたりを気にしないで済むかもしれません。
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[フォームの×ボタンで閉じないで、Hide にする。 - SN工房](http://snfactory.blog54.fc2.com/blog-entry-30.html)
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[フォームの×ボタンで閉じないで、Hide にする。 - SN工房](http://snfactory.blog54.fc2.com/blog-entry-30.html)
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## 追記
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```cs:FormA.cs
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using System;
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using System.Windows.Forms;
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namespace Qcqonfgr3inq2r5
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{
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public partial class FormA : Form
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{
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public FormA()
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{
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InitializeComponent();
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// FormCは閉じずにHide作戦なので、newは１回だけ
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fmC = new FormC(this);
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timer2.Tick += fmC.Timer_Tick;
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}
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#region FormB
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private readonly Timer timer1 = new Timer { Interval = 500, };
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private FormB fmB; // 最初はnull
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private int value1;
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public void Value1() => value1++;
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public void ResultOutput1() => textBox1.Text = value1.ToString();
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private void ButtonStart1(object sender, EventArgs e)
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{
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// もしFormBがすでにnewされていたら、イベント解除＆閉じる
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if (fmB != null)
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{
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timer1.Tick -= fmB.Timer_Tick;
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fmB.Close();
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}
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// FormBを作ってイベント登録＆表示
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fmB = new FormB(this);
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timer1.Tick += fmB.Timer_Tick;
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fmB.Show();
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timer1.Start();
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}
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private void ButtonStop1(object sender, EventArgs e) => timer1.Stop();
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#endregion
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#region FormC
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private readonly Timer timer2 = new Timer { Interval = 500, };
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private readonly FormC fmC;
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private int value2;
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public void Value2() => value2++;
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public void ResultOutput2() => textBox2.Text = value2.ToString();
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private void ButtonStart2(object sender, EventArgs e)
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{
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fmC.Show();
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fmC.Activate(); // ほかのウィンドウに隠れていたら気が付かないのでアクティブ化
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fmC.WindowState = FormWindowState.Normal; // アイコン化してたら復帰
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timer2.Start();
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}
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private void ButtonStop2(object sender, EventArgs e) => timer2.Stop();
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#endregion
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}
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}
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```
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```cs:FormB.cs
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using System;
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using System.Windows.Forms;
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namespace Qcqonfgr3inq2r5
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{
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public partial class FormB : Form
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{
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private readonly FormA fmA;
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public FormB(FormA formA)
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{
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fmA = formA;
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InitializeComponent();
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}
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public void Timer_Tick(object sender, EventArgs e)
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{
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fmA.Value1();
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fmA.ResultOutput1();
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}
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}
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}
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```
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```cs:FormC.cs
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using System;
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using System.Windows.Forms;
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namespace Qcqonfgr3inq2r5
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{
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public partial class FormC : Form
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{
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private readonly FormA fmA;
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public FormC(FormA formA)
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{
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fmA = formA;
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InitializeComponent();
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FormClosing += FormC_FormClosing;
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}
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public void Timer_Tick(object sender, EventArgs e)
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{
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fmA.Value2();
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fmA.ResultOutput2();
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}
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private void FormC_FormClosing(object sender, FormClosingEventArgs e)
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228
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{
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229
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if (e.CloseReason == CloseReason.UserClosing)
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230
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{
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231
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e.Cancel = true;
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232
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Hide();
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233
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}
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234
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}
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235
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}
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}
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```
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