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リスト内の検索を使ったデータ更新
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using System; | |
using System.Collections.Generic; | |
using System.Linq; | |
using System.Text; | |
using System.Threading.Tasks; | |
namespace リスト内の検索を使ったデータ更新 | |
{ | |
class Program | |
{ | |
static void Main(string[] args) | |
{ | |
// リストデータを定義 | |
List<string> list = new List<string>(); | |
// データを追加 | |
list.Add("香川"); | |
list.Add("愛媛"); | |
list.Add("北海道"); | |
list.Add("高知"); | |
// 更新前のデータを表示 | |
foreach (string x in list) | |
{ | |
Console.WriteLine(x); | |
} | |
// データを更新 | |
int index = list.IndexOf("北海道"); // 「北海道」の添え字番号を取得 | |
list.RemoveAt(index); // 削除(1) | |
list.Insert(index, "徳島"); // 削除した位置に挿入(2) | |
// (1)(2)の手順の代わりに | |
// list[index] = "徳島"; でも同じ | |
// 更新後のデータを表示 | |
Console.WriteLine("\n-----------更新後-------------"); | |
foreach (string x in list) | |
{ | |
Console.WriteLine(x); | |
} | |
} | |
} | |
} |
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