質問編集履歴
3
追記
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Microsoft .NET Framework
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Version 4.7.03190
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### サンプルプログラム（2019年10月31日13時43分追記）
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再現しないとご指摘があったため、List生成から呼び出しまでのサンプルプログラムを作成しました。
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渡しの環境では以下プログラムで同じエラーが発生します。
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```C#
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using System.Collections.Generic;
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using System.Linq;
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namespace ConsoleApp3
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{
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class Program
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{
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static void Main(string[] args)
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{
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List<string[]> data1 = new List<string[]>();
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List<string[]> data2 = new List<string[]>();
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List<dynamic> agg1 = new List<dynamic>();
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List<dynamic> agg2 = new List<dynamic>();
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data1.Add(new string[4] { "1", "2", "3", "4" });
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data1.Add(new string[4] { "2", "2", "3", "4" });
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data1.Add(new string[4] { "3", "2", "3", "4" });
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data2.Add(new string[4] { "1", "2", "3", "4" });
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data2.Add(new string[4] { "2", "2", "3", "4" });
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data2.Add(new string[4] { "3", "2", "3", "4" });
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data2.Add(new string[4] { "aaa", "2", "3", "4" });
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int item_count = 0;
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for (int j = 0; j < 2; j++)
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{
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agg1.Add(new
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{
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title = j.ToString(),
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result = data1.GroupBy(x => x[item_count])
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.Select(x => new { Choise = x.Key, Count = x.Count() })
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.OrderBy(x => x.Choise).ToList()
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});
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item_count++;
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}
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item_count = 0;
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for (int j = 0; j < 2; j++)
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{
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agg2.Add(new
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{
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title = j.ToString(),
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result = data2.GroupBy(x => x[item_count])
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.Select(x => new { Choise = x.Key, Count = x.Count() })
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.OrderBy(x => x.Choise).ToList()
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});
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item_count++;
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}
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agg1 = List_Comp(agg1, agg2);
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}
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private static List<dynamic> List_Comp(List<dynamic> target, List<dynamic> reference)
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{
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int list_count = 0;
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bool Contains_flg = false;
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foreach (dynamic dy in reference)
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{
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foreach (var item in dy.result)
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{
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Contains_flg = false;
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foreach (var it in target[list_count].result)
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{
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if (item.Choise == it.Choise)
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{
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Contains_flg = true;
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}
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}
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if (Contains_flg == false)
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{
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// 選択肢の追加
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// 実行時エラー
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target[list_count].result.Add(new { Choise = item.Choise, Count = 0 });
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}
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}
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list_count++;
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}
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return (target);
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}
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}
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}
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```
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2
コメントの修正
test
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test
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@@ -80,17 +80,17 @@
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// 選択肢の追加
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// 実行時エラー
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target[list_count].result.Add(new { Choise = item.Choise.ToString(), Count = 0 });
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//
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// 試したこと① 正常にListのresultにAddされた
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// target[list_count].result.Add(new { Choise = "aaa", Count = 0 });
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//
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// 試したこと② 正常にメッセージ"aaa"が表示された
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// MessageBox.Show(item.Choise);
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コードの修正
test
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@@ -78,13 +78,21 @@
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{
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// 選択肢の追加
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// ←実行時エラー
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target[list_count].result.Add(new { Choise = item.Choise.ToString(), Count = 0 });
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// ←試したこと① 正常にListのresultにAddされた
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// target[list_count].result.Add(new { Choise = "aaa", Count = 0 });
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//
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// ←試したこと② 正常にメッセージ"aaa"が表示された
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// MessageBox.Show(item.Choise);
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}
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