{"id":2780,"date":"2012-01-06T12:46:35","date_gmt":"2012-01-06T03:46:35","guid":{"rendered":"http:\/\/www.moonmile.net\/blog\/archives\/2780"},"modified":"2012-01-06T12:47:07","modified_gmt":"2012-01-06T03:47:07","slug":"%e3%82%ad%e3%83%a3%e3%83%83%e3%82%b7%e3%83%a5%e3%82%92%e4%bd%9c%e3%81%a3%e3%81%a6datatable%e3%81%ae%e3%82%a2%e3%82%af%e3%82%bb%e3%82%b9%e3%82%92%e9%ab%98%e9%80%9f%e3%81%ab%e3%81%99%e3%82%8b","status":"publish","type":"post","link":"http:\/\/www.moonmile.net\/blog\/archives\/2780","title":{"rendered":"\u30ad\u30e3\u30c3\u30b7\u30e5\u3092\u4f5c\u3063\u3066DataTable\u306e\u30a2\u30af\u30bb\u30b9\u3092\u9ad8\u901f\u306b\u3059\u308b"},"content":{"rendered":"

\n\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u30a2\u30af\u30bb\u30b9\u306e\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u30c1\u30e5\u30fc\u30cb\u30f3\u30b0\u4f8b | Moonmile Solutions Blog
\nhttp:\/\/www.moonmile.net\/blog\/archives\/2423<\/a>\n<\/p>\n

\n\u306e\u7d9a\u304d\u3092\u4f5c\u308d\u3046\u3068\u601d\u3063\u3066\u300c\uff13\u5206\u9593\u30af\u30c3\u30ad\u30f3\u30b0\u300d\u306a\u3089\u306c\u300c30\u5206\u9593\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u300d\u306b\u306a\u3063\u3066\u3057\u307e\u3044\u307e\u3057\u305f\u3002\u30c6\u30f3\u30d7\u30ec\u30fc\u30c8\u3092\u4f7f\u3063\u305f\u3082\u306e\u3068\u3001DataRow \u3092\u305d\u306e\u307e\u307e\u4f7f\u3063\u305f\u3082\u306e\u3068\u3092 2 \u3064\u4f5c\u3063\u3066\u3057\u307e\u3063\u305f\u304b\u3067\u3059\u306d\u3002DataTable \u3084 List<> \u306e\u5834\u5408\u306b\u306f\u3001Select \u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u3048\u308b\u306e\u3067\u306f\u306a\u3044\u304b\uff1f\u3068\u3044\u3046\u306e\u3082\u3042\u308a\u307e\u3059\u304c\u3001Dictionary \u3092\u4f7f\u3063\u3066\u3044\u308b\u306e\u3067\u901f\u5ea6\u7684\u306b\u306f\u65ad\u7136\u9ad8\u901f\u306a\u306f\u305a\u3067\u3059\u3002\u5c11\u306a\u304f\u3068\u3082\u300120\u4e07\u4ef6\u3050\u3089\u3044\u3067\u3082\u3001Dictionary \u306e\u5834\u5408\u306f\u3001\u4e00\u77ac\uff080.001\u79d2\u4ee5\u4e0b\uff09\u3067\u8fd4\u3063\u3066\u304d\u307e\u3059\u3002\n<\/p>\n

\n\u25a0\u5229\u7528\u306e\u4ed5\u65b9\n<\/p>\n

\nprivate string CNSTR = "";\nprivate AnkenCache cache = null;\n\nprivate void button1_Click(object sender, EventArgs e)\n{\n\tif (cache == null)\n\t{\n\t\tSqlConnection cn = new SqlConnection(CNSTR);\n\t\tSqlDataAdapter da = new SqlDataAdapter("SELECT * FROM ANKEN", cn);\n\t\tDataTable dt = new DataTable();\n\t\tda.Fill(dt);\n\t\t\/\/ \u30ad\u30e3\u30c3\u30b7\u30e5\u306b\u8a2d\u5b9a\n\t\tthis.cache.SetData(dt);\n\t}\n\tint id = int.Parse(textBox1.Text);\n\tDataRow row = cache.Get(id.ToString());\n\ttextBox2.Text = (string)row["name"];\n}\n<\/pre>\n
\n\u3053\u3093\u306a\u98a8\u306b\u30ad\u30e3\u30c3\u30b7\u30e5\u5229\u7528\u3057\u307e\u3059\u3002\uff11\u5ea6\u76ee\u306f\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u304b\u3089\u691c\u7d22\u3059\u308b\u3051\u3069\u3001\uff12\u5ea6\u76ee\u4ee5\u964d\u306f\u30ad\u30e3\u30c3\u30b7\u30e5\u3092\u4f7f\u3046\u3063\u3066\u3053\u3068\u3067\u3002
\n\u30ad\u30fc\u60c5\u5831\u306f\u3001string \u578b\u306a\u306e\u3067\u3001\u9069\u5f53\u306a MakeKey \u306a\u308b\u95a2\u6570\u3092\u4f5c\u3063\u3066\u304a\u304f\u3068\u4fbf\u5229\u3067\u3059\u3002\n<\/p>\n
\n\u25a0\u5185\u90e8\u30b3\u30fc\u30c9\n<\/p>\n
\nDataTable \u3092\u6e21\u3057\u3066 DataRow \u306e\u4e2d\u8eab\u3092 Dictionary \u306b\u30ad\u30e3\u30c3\u30b7\u30e5\u3057\u3066\u3044\u308b\u3060\u3051\u3067\u3059\u3002\u67d0\u6848\u4ef6\u3067\u306f\u3001\u3053\u308c\u306b\u4f3c\u305f\u3053\u3068\u3092\u3084\u308a\u307e\u3057\u305f\u304c\u3001\u3053\u3063\u3061\u306e\u307b\u3046\u304c\u6d17\u7df4\u3055\u308c\u3066\u3044\u308b…\u3068\u601d\u3046\u3002\n<\/p>\n
\npublic abstract class SelectCacheTableRow\n{\n\tprotected Dictionary<string, DataRow> _dic;\n\tpublic DataRow Empty { get; set; }\n\n\tpublic SelectCacheTableRow()\n\t{\n\t\t_dic = new Dictionary<string, DataRow>();\n\t\tthis.Empty = new DataTable().NewRow(); \/\/ \u7a7a\u3092\u8a2d\u5b9a\n\t}\n\tpublic void Set(string key, DataRow value)\n\t{\n\t\tif (_dic.ContainsKey(key) == true)\n\t\t{\n\t\t\t_dic[key] = value;\n\t\t}\n\t\telse\n\t\t{\n\t\t\t_dic.Add(key, value);\n\t\t}\n\t}\n\tpublic DataRow Get(string key)\n\t{\n\t\tif (_dic.ContainsKey(key) == true)\n\t\t{\n\t\t\treturn _dic[key];\n\t\t}\n\t\telse\n\t\t{\n\t\t\treturn this.Empty;\n\t\t}\n\t}\n\t\/\/\/ <summary>\n\t\/\/\/ \u30ad\u30fc\u60c5\u5831\u3092\u4f5c\u6210\n\t\/\/\/ <\/summary>\n\t\/\/\/ <param name=&quot;t&quot;><\/param>\n\t\/\/\/ <returns><\/returns>\n\tpublic abstract string MakeKey(DataRow it);\n\t\/\/\/ <summary>\n\t\/\/\/ \u30c7\u30fc\u30bf\u3092\u8a2d\u5b9a\n\t\/\/\/ <\/summary>\n\t\/\/\/ <param name=&quot;table&quot;><\/param>\n\tpublic void SetData(DataTable table)\n\t{\n\t\tforeach (DataRow it in table.Rows)\n\t\t{\n\t\t\tthis.Set(MakeKey(it), it);\n\t\t}\n\t}\n}\n\npublic class AnkenCache : SelectCacheTableRow\n{\n\t\/\/\/ <summary>\n\t\/\/\/ \u30ad\u30fc\u60c5\u5831\u3092\u4f5c\u6210\n\t\/\/\/ <\/summary>\n\t\/\/\/ <param name=&quot;t&quot;><\/param>\n\t\/\/\/ <returns><\/returns>\n\tpublic override string MakeKey(DataRow row)\n\t{\n\t\treturn row[&quot;id&quot;].ToString();\n\t}\n}\n<\/pre>\n
\n\u25a0\u30c6\u30f3\u30d7\u30ec\u30fc\u30c8\u3092\u4f7f\u3046\n<\/p>\n
\n\u4e0a\u8a18\u306e\u4f8b\u3060\u3068\u3001DataRow \u3057\u304b\u6271\u3048\u306a\u3044\u306e\u3067\u3001\u5358\u7d14\u306a\u30c7\u30fc\u30bf\u30af\u30e9\u30b9\u3092\u4f7f\u3044\u305f\u3044\u5834\u5408\uff08\u3053\u3063\u3061\u306e\u307b\u3046\u304c\u304a\u52e7\u3081\u306a\u3093\u3060\u304c\uff09\u3001\u30c6\u30f3\u30d7\u30ec\u30fc\u30c8\uff08\u6b63\u78ba\u306b\u306f\u30b8\u30a7\u30cd\u30ea\u30c3\u30af\uff09\u7248\u3092\u4f7f\u3044\u307e\u3059\u3002\u300cProject\u300d\u3068\u3044\u3046\u30d7\u30ed\u30d1\u30c6\u30a3\u3060\u3051\u306e\u30af\u30e9\u30b9\u3092\u4f5c\u3063\u3066\u304a\u3044\u3066\u3001\u30d7\u30ed\u30d1\u30c6\u30a3\u540d\u3067\u30a2\u30af\u30bb\u30b9\u3067\u304d\u308b\u3088\u3046\u306b\u3057\u307e\u3059\u3002DataRow \u304b\u3089\u30c7\u30fc\u30bf\u30af\u30e9\u30b9\u3078\u306e\u30b3\u30f3\u30d0\u30fc\u30c8\u306f\u3001\u30ea\u30d5\u30ec\u30af\u30b7\u30e7\u30f3\u3092\u4f7f\u3063\u305f\u30d0\u30fc\u30b8\u30e7\u30f3\u3092\u7528\u610f\u3057\u3066\u304a\u304f\u3068\uff08\u578b\u306a\u3057DataTable\u304b\u3089\u578b\u4ed8\u304dDataTable\u306b\u30b3\u30d4\u30fc\u3059\u308b\u65b9\u6cd5 | Moonmile Solutions Blog<\/a> \u53c2\u7167\uff09\u3044\u3044\u3067\u3057\u3087\u3046\u3002\n<\/p>\n
\npublic abstract class SelectCache<T> where T: new()\n{\n\tprotected Dictionary<string, T> _dic;\n\tpublic T Empty { get; set; }\n\n\tpublic SelectCache()\n\t{\n\t\t_dic = new Dictionary<string, T>();\n\t\tthis.Empty = new T(); \/\/ \u7a7a\u3092\u8a2d\u5b9a\n\t}\n\tpublic void Set(string key, T value)\n\t{\n\t\tif (_dic.ContainsKey(key) == true)\n\t\t{\n\t\t\t_dic[key] = value;\n\t\t}\n\t\telse\n\t\t{\n\t\t\t_dic.Add(key, value);\n\t\t}\n\t}\n\tpublic T Get(string key)\n\t{\n\t\tif (_dic.ContainsKey(key) == true)\n\t\t{\n\t\t\treturn _dic[key];\n\t\t}\n\t\telse\n\t\t{\n\t\t\treturn this.Empty;\n\t\t}\n\t}\n\t\/\/\/ <summary>\n\t\/\/\/ \u30ad\u30fc\u60c5\u5831\u3092\u4f5c\u6210\n\t\/\/\/ <\/summary>\n\t\/\/\/ <param name=&quot;t&quot;><\/param>\n\t\/\/\/ <returns><\/returns>\n\tpublic abstract string MakeKey(T it);\n\t\/\/\/ <summary>\n\t\/\/\/ \u30c7\u30fc\u30bf\u3092\u8a2d\u5b9a\n\t\/\/\/ <\/summary>\n\t\/\/\/ <param name=&quot;table&quot;><\/param>\n\tpublic void SetData(List<T> items)\n\t{\n\t\tforeach (T it in items)\n\t\t{\n\t\t\tthis.Set(MakeKey(it) , it);\n\t\t}\n\t}\n}\npublic class Project\n{\n\tpublic int id { get; set; }\n\tpublic int projnum { get; set; }\n\tpublic string name { get; set; }\n\tpublic int parent_id { get; set; }\n\tpublic string desc { get; set; }\n\tpublic DateTime updatedate { get; set; }\n}\npublic class ProjectCache : SelectCache<Project>\n{\n\t\/\/ \u30ad\u30fc\u60c5\u5831\u3092\u4f5c\u6210\n\tpublic override string MakeKey(Project it)\n\t{\n\t\treturn it.id.ToString() + &quot;_&quot; + it.projnum.ToString();\n\t}\n}\n<\/pre>\n
\nEmpty \u30d7\u30ed\u30d1\u30c6\u30a3\u3092 null \u306b\u3057\u306a\u3044\u306e\u306f\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u66f8\u304d\u65b9\u3067\u3082\u30a8\u30e9\u30fc\u306b\u306a\u3089\u306a\u3044\u3088\u3046\u306b\u3059\u308b\u305f\u3081\u3067\u3059\u3002DataRow \u306e\u5834\u5408\u306f\u540d\u524d\u304c\u30de\u30c3\u30c1\u30f3\u30b0\u3057\u306a\u3044\u3068\u4f8b\u5916\u3092\u767a\u751f\u3057\u307e\u3059\u304c\u3001\u3053\u3061\u3089\u306e\u5834\u5408\u306f1\u884c\u3067\u66f8\u3051\u308b\u304b\u3089\u4fbf\u5229\u304b\u3068\u3002if\u6587\u3067\u3044\u3061\u3044\u3061\u30c1\u30a7\u30c3\u30af\u3057\u306a\u304f\u3066\u3088\u3044\u306e\u3067\u3002\n<\/p>\n
\nstring name = cache.Get( key ).name ;\n<\/pre>\n
\n\u6562\u3048\u3066\u7a7a\u3092\u8abf\u3079\u305f\u3044\u3068\u304d\u306f\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u66f8\u304d\u307e\u3059\u3002\n<\/p>\n
\nstring name = "";\nif ( cache.Get(key) != cache.Empty ) {\n  name = cache.Get( key ).name ;\n}\n<\/pre>\n","protected":false},"excerpt":{"rendered":"
\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u30a2\u30af\u30bb\u30b9\u306e\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u30c1\u30e5\u30fc\u30cb\u30f3\u30b0\u4f8b | Moonmile Solutions Blog http:\/\/www.moonmile.net\/blog\/archives\/2423 \u306e\u7d9a\u304d\u3092\u4f5c\u308d\u3046\u3068\u601d\u3063\u3066\u300c\uff13\u5206\u9593 … \u7d9a\u304d\u3092\u8aad\u3080 →<\/span><\/a><\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[23],"tags":[],"class_list":["post-2780","post","type-post","status-publish","format-standard","hentry","category-csharp"],"jetpack_featured_media_url":"","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"http:\/\/www.moonmile.net\/blog\/wp-json\/wp\/v2\/posts\/2780","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/www.moonmile.net\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/www.moonmile.net\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/www.moonmile.net\/blog\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"http:\/\/www.moonmile.net\/blog\/wp-json\/wp\/v2\/comments?post=2780"}],"version-history":[{"count":1,"href":"http:\/\/www.moonmile.net\/blog\/wp-json\/wp\/v2\/posts\/2780\/revisions"}],"predecessor-version":[{"id":2781,"href":"http:\/\/www.moonmile.net\/blog\/wp-json\/wp\/v2\/posts\/2780\/revisions\/2781"}],"wp:attachment":[{"href":"http:\/\/www.moonmile.net\/blog\/wp-json\/wp\/v2\/media?parent=2780"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.moonmile.net\/blog\/wp-json\/wp\/v2\/categories?post=2780"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.moonmile.net\/blog\/wp-json\/wp\/v2\/tags?post=2780"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}