回答編集履歴
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見直しキャンペーン中
answer
CHANGED
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@@ -1,31 +1,31 @@
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今の時間が何時でもいいように`.Date`してから引き算、`TimeSpan`の`.Days`が目的の数値です。
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1
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今の時間が何時でもいいように`.Date`してから引き算、`TimeSpan`の`.Days`が目的の数値です。
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2
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-
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2
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3
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```
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3
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```cs
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4
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private void button1_Click(object sender, EventArgs e)
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private void button1_Click(object sender, EventArgs e)
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{
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5
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{
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DateTime dateTime1 = DateTime.Now;
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DateTime dateTime1 = DateTime.Now;
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DateTime dateTime2 = new DateTime(2020, 4, 25);
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DateTime dateTime2 = new DateTime(2020, 4, 25);
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8
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9
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TimeSpan result = dateTime2.Date - dateTime1.Date;
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9
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TimeSpan result = dateTime2.Date - dateTime1.Date;
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int days = result.Days;
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10
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int days = result.Days;
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label1.Text = days.ToString(); // 6
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label1.Text = days.ToString(); // 6
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}
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}
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```
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```
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```
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```cs
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private void button1_Click(object sender, EventArgs e)
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private void button1_Click(object sender, EventArgs e)
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{
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{
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DateTimeOffset dateTimeOffset1 = DateTimeOffset.Now;
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DateTimeOffset dateTimeOffset1 = DateTimeOffset.Now;
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// どれも 2020/04/10 0:00:00 +09:00
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// どれも 2020/04/10 0:00:00 +09:00
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//DateTimeOffset dateTimeOffset2 = new DateTimeOffset(new DateTime(2020, 4, 10, 0, 0, 0), TimeSpan.FromHours(9));
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//DateTimeOffset dateTimeOffset2 = new DateTimeOffset(new DateTime(2020, 4, 10, 0, 0, 0), TimeSpan.FromHours(9));
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//DateTimeOffset dateTimeOffset2 = new DateTimeOffset(new DateTime(2020, 4, 10, 0, 0, 0, DateTimeKind.Local));
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//DateTimeOffset dateTimeOffset2 = new DateTimeOffset(new DateTime(2020, 4, 10, 0, 0, 0, DateTimeKind.Local));
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DateTimeOffset dateTimeOffset2 = new DateTimeOffset(new DateTime(2020, 4, 10, 0, 0, 0));
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DateTimeOffset dateTimeOffset2 = new DateTimeOffset(new DateTime(2020, 4, 10, 0, 0, 0));
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25
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TimeSpan result = dateTimeOffset2.Date - dateTimeOffset1.Date;
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TimeSpan result = dateTimeOffset2.Date - dateTimeOffset1.Date;
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int days = result.Days;
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int days = result.Days;
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label1.Text = days.ToString(); // -9
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label1.Text = days.ToString(); // -9
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}
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}
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```
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```
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31
31
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日本時間で計算するんですよね？
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