{"id":3346,"date":"2026-07-16T15:00:15","date_gmt":"2026-07-16T06:00:15","guid":{"rendered":"https:\/\/y42u.net\/tec001\/2026\/07\/16\/robust-csv-maui\/"},"modified":"2026-07-30T11:49:37","modified_gmt":"2026-07-30T02:49:37","slug":"robust-csv-maui","status":"publish","type":"post","link":"https:\/\/y42u.net\/tec001\/2026\/07\/16\/robust-csv-maui\/","title":{"rendered":"MAUI\u3067CSV\u5165\u51fa\u529b\u3092\u5805\u7262\u306b\u3059\u308b \u2014 \u6587\u5b57\u30b3\u30fc\u30c9\u30fbBOM\u30fb\u6539\u884c\u306e\u5b9f\u52d9"},"content":{"rendered":"<style>img.autopost-single-image{width:30%;max-width:100%;height:auto;display:block;}@media (max-width: 768px){img.autopost-single-image{width:50%;}}<\/style>\n<p><img decoding=\"async\" style=\"width:80%;max-width:100%;height:auto;display:block;margin:0 auto;\" src=\"https:\/\/y42u.net\/tec001\/wp-content\/uploads\/2026\/07\/gde-robust-csv-maui.jpg\" alt=\"MAUI\u3067CSV\u5165\u51fa\u529b\u3092\u5805\u7262\u306b\u3059\u308b \u2014 \u6587\u5b57\u30b3\u30fc\u30c9\u30fbBOM\u30fb\u6539\u884c\u306e\u5b9f\u52d9\"><\/p>\n<h1 id=\"mauicsv-bom\">MAUI\u3067CSV\u5165\u51fa\u529b\u3092\u5805\u7262\u306b\u3059\u308b \u2014 \u6587\u5b57\u30b3\u30fc\u30c9\u30fbBOM\u30fb\u6539\u884c\u306e\u5b9f\u52d9<\/h1>\n<p>GeoDiveExa\uff08GDE\uff09\u306f\u73fe\u5834\u3067\u8a08\u6e2c\u3057\u305f\u30c7\u30fc\u30bf\u3092CSV\u3067\u66f8\u304d\u51fa\u3057\u3001\u307e\u305f\u4ed6\u30b7\u30b9\u30c6\u30e0\u304b\u3089\u6e21\u3055\u308c\u305fCSV\u3092\u8aad\u307f\u8fbc\u3080\u5834\u9762\u304c\u3042\u308a\u307e\u3059\u3002\u5ea7\u6a19\u5909\u63db\u306e\u4e2d\u8eab\uff08\u6e2c\u5730\u7cfb\u30fb\u6295\u5f71\u6cd5\uff09\u306f<a href=\"https:\/\/y42u.net\/tec001\/2026\/07\/10\/geocore-dual-implementation\/\">GeoCoreJP<\/a>\u5074\u306e\u8a71\u3067\u3059\u304c\u3001\u305d\u306e\u624b\u524d\u306e\u300c\u30d5\u30a1\u30a4\u30eb\u3092\u3069\u3046\u8aad\u307f\u66f8\u304d\u3059\u308b\u304b\u300d\u3067\u3082\u5b9f\u52d9\u4e0a\u306e\u843d\u3068\u3057\u7a74\u304c\u591a\u304f\u3001\u5730\u5473\u306b\u6642\u9593\u3092\u53d6\u3089\u308c\u3066\u304d\u307e\u3057\u305f\u3002\u4eca\u56de\u306fC#\uff08.NET MAUI\uff09\u3067\u306eCSV\u5165\u51fa\u529b\u3092\u5805\u7262\u306b\u3059\u308b\u305f\u3081\u306b\u6c17\u3092\u4ed8\u3051\u3066\u3044\u308b\u3001\u6587\u5b57\u30b3\u30fc\u30c9\u30fbBOM\u30fb\u6539\u884c\u307e\u308f\u308a\u306e\u5b9f\u52d9\u3092\u307e\u3068\u3081\u307e\u3059\u3002<\/p>\n<hr \/>\n<h2 id=\"csv-shift-jiscrlf\">\u73fe\u5834\u306eCSV\u306f\u6c5a\u3044 \u2014 \u5217\u9806\u30d0\u30e9\u30d0\u30e9\u30fbShift-JIS\u30fbCRLF<\/h2>\n<p>\u6e2c\u91cf\u30fbGIS\u696d\u52d9\u3067\u3084\u308a\u53d6\u308a\u3055\u308c\u308bCSV\u306f\u3001\u5fc5\u305a\u3057\u3082\u300c\u304d\u308c\u3044\u306aUTF-8\u30fbLF\u30ab\u30f3\u30de\u533a\u5207\u308a\u300d\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u3002\u5b9f\u52d9\u3067\u3088\u304f\u906d\u9047\u3059\u308b\u306e\u306f\u6b21\u306e\u3088\u3046\u306a\u30d1\u30bf\u30fc\u30f3\u3067\u3059\u3002<\/p>\n<ul>\n<li><strong>\u6587\u5b57\u30b3\u30fc\u30c9\u304cShift-JIS\uff08\u307e\u305f\u306fCP932\uff09<\/strong>\uff1aExcel\u3067\u4f5c\u6210\u30fb\u4fdd\u5b58\u3055\u308c\u305fCSV\u306f\u3001\u3044\u307e\u3060\u306bShift-JIS\u306e\u3053\u3068\u304c\u73cd\u3057\u304f\u306a\u3044<\/li>\n<li><strong>\u5217\u9806\u304c\u73fe\u5834\u3054\u3068\u306b\u9055\u3046<\/strong>\uff1a\u540c\u3058\u300c\u7def\u5ea6\u30fb\u7d4c\u5ea6\u30fb\u6a19\u9ad8\u300d\u3067\u3082\u3001\u5217\u306e\u4e26\u3073\u3084\u5217\u540d\u306e\u8868\u8a18\uff08<code>lat<\/code>\/<code>\u7def\u5ea6<\/code>\/<code>Y\u5ea7\u6a19<\/code> \u306a\u3069\uff09\u304c\u30d5\u30a1\u30a4\u30eb\u306b\u3088\u3063\u3066\u30d0\u30e9\u30d0\u30e9<\/li>\n<li><strong>\u6539\u884c\u30b3\u30fc\u30c9\u304cCRLF<\/strong>\uff1aWindows\u7531\u6765\u306e\u30d5\u30a1\u30a4\u30eb\u306fCRLF\u3001Unix\u7cfb\u30c4\u30fc\u30eb\u304c\u5410\u3044\u305f\u30d5\u30a1\u30a4\u30eb\u306fLF\u3068\u6df7\u5728\u3059\u308b\u3053\u3068\u304c\u3042\u308b<\/li>\n<li><strong>\u672b\u5c3e\u30ab\u30f3\u30de\u3084\u7a7a\u884c\u304c\u6df7\u3056\u308b<\/strong>\uff1aExcel\u3067\u306e\u624b\u7de8\u96c6\u306e\u526f\u4f5c\u7528\u3067\u3001\u610f\u56f3\u3057\u306a\u3044\u672b\u5c3e\u30ab\u30f3\u30de\u3084\u7a7a\u884c\u304c\u5165\u3063\u3066\u3044\u308b\u3053\u3068\u304c\u3042\u308b<\/li>\n<\/ul>\n<p>\u300c\u307e\u305a\u5c4a\u3044\u305f\u30d5\u30a1\u30a4\u30eb\u3092\u305d\u306e\u307e\u307e\u4fe1\u7528\u3057\u306a\u3044\u300d\u3068\u3044\u3046\u524d\u63d0\u3067\u5165\u51fa\u529b\u30b3\u30fc\u30c9\u3092\u66f8\u304f\u5fc5\u8981\u304c\u3042\u308b\u3001\u3068\u3044\u3046\u306e\u304c\u5b9f\u611f\u3067\u3059\u3002<\/p>\n<hr \/>\n<h2 id=\"codepagesencodingprovider\">\u6587\u5b57\u30b3\u30fc\u30c9\u306e\u6307\u5b9a \u2014 CodePagesEncodingProvider\u304c\u5fc5\u9808<\/h2>\n<p>.NET\uff08.NET Core\u4ee5\u964d\uff09\u306f\u65e2\u5b9a\u3067Shift-JIS\u3084CP932\u306e\u3088\u3046\u306a\u53e4\u3044\u30b3\u30fc\u30c9\u30da\u30fc\u30b8\u306b\u5bfe\u5fdc\u3057\u3066\u3044\u307e\u305b\u3093\u3002\u305d\u306e\u307e\u307e\u3060\u3068<code>Encoding.GetEncoding(\"shift_jis\")<\/code>\u304c\u4f8b\u5916\u3092\u6295\u3052\u307e\u3059\u3002MAUI\u30a2\u30d7\u30ea\u3067CP932\u3092\u6271\u3046\u306b\u306f\u3001\u8d77\u52d5\u6642\u306b<code>CodePagesEncodingProvider<\/code>\u3092\u767b\u9332\u3057\u3066\u304a\u304f\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<pre><code class=\"language-csharp\">\/\/ \u30a2\u30d7\u30ea\u8d77\u52d5\u6642\uff08MauiProgram.cs \u306a\u3069\uff09\u306b\u4e00\u5ea6\u3060\u3051\u767b\u9332\nSystem.Text.Encoding.RegisterProvider(\n    System.Text.CodePagesEncodingProvider.Instance);\n\n\/\/ \u3053\u308c\u3067CP932\uff08Shift-JIS\uff09\u304c\u4f7f\u3048\u308b\u3088\u3046\u306b\u306a\u308b\nvar sjis = System.Text.Encoding.GetEncoding(&quot;shift_jis&quot;);\n<\/code><\/pre>\n<p><code>System.Text.Encoding.CodePages<\/code> \u30d1\u30c3\u30b1\u30fc\u30b8\u3078\u306e\u53c2\u7167\u304c\u5fc5\u8981\u306a\u70b9\u3082\u5fd8\u308c\u304c\u3061\u306a\u30dd\u30a4\u30f3\u30c8\u3067\u3059\u3002\u3053\u306e\u767b\u9332\u3092\u5fd8\u308c\u308b\u3068\u300c\u958b\u767a\u6a5f\u3067\u306f\u52d5\u3044\u305f\u306e\u306b\u914d\u5e03\u30d3\u30eb\u30c9\u3067\u4f8b\u5916\u300d\u3068\u3044\u3046\u5f62\u3067\u898b\u3064\u304b\u308b\u3053\u3068\u304c\u3042\u308a\u3001\u65e9\u3044\u6bb5\u968e\u3067\u30a2\u30d7\u30ea\u8d77\u52d5\u51e6\u7406\u306b\u7d44\u307f\u8fbc\u3093\u3067\u304a\u304f\u306e\u304c\u5b89\u5168\u3067\u3059\u3002<\/p>\n<p>\u8aad\u307f\u8fbc\u307f\u5074\u3067\u306f\u3001\u6587\u5b57\u30b3\u30fc\u30c9\u3092\u30d5\u30a1\u30a4\u30eb\u3054\u3068\u306b\u81ea\u52d5\u5224\u5b9a\u3059\u308b\u306e\u306f\u96e3\u3057\u3044\u305f\u3081\u3001GDE\u3067\u306f\u300cUTF-8\uff08BOM\u6709\u7121\u3069\u3061\u3089\u3082\uff09\u300d\u3068\u300cShift-JIS\u300d\u3092\u5019\u88dc\u306b\u3057\u3066\u3001\u660e\u3089\u304b\u306a\u6587\u5b57\u5316\u3051\uff08\u7f6e\u63db\u6587\u5b57\u306e\u51fa\u73fe\u306a\u3069\uff09\u3092\u691c\u51fa\u3057\u305f\u3089\u6b21\u306e\u5019\u88dc\u306b\u30d5\u30a9\u30fc\u30eb\u30d0\u30c3\u30af\u3059\u308b\u3001\u3068\u3044\u3046\u7c21\u6613\u7684\u306a\u5224\u5b9a\u3092\u884c\u3063\u3066\u3044\u307e\u3059\u3002\u5b8c\u5168\u306a\u81ea\u52d5\u5224\u5b9a\u306f\u96e3\u3057\u3044\u306e\u3067\u3001\u6700\u7d42\u7684\u306b\u306f\u30e6\u30fc\u30b6\u30fc\u304c\u6587\u5b57\u30b3\u30fc\u30c9\u3092\u9078\u3073\u76f4\u305b\u308bUI\u3082\u7528\u610f\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n<hr \/>\n<h2 id=\"bomexcel\">BOM\u6709\u7121\u3068Excel\u306e\u6319\u52d5<\/h2>\n<p>UTF-8\u3067\u66f8\u304d\u51fa\u3057\u305fCSV\u3092Excel\u3067\u958b\u3044\u305f\u3068\u304d\u306b\u6587\u5b57\u5316\u3051\u3059\u308b\u3001\u3068\u3044\u3046\u554f\u984c\u306fBOM\uff08Byte Order Mark\uff09\u306e\u6709\u7121\u304c\u539f\u56e0\u3067\u3042\u308b\u3053\u3068\u304c\u307b\u3068\u3093\u3069\u3067\u3059\u3002<\/p>\n<ul>\n<li><strong>BOM\u7121\u3057\u306eUTF-8<\/strong>\uff1aWindows\u7248Excel\u3067\u30c0\u30d6\u30eb\u30af\u30ea\u30c3\u30af\u3057\u3066\u958b\u304f\u3068\u3001\u65e5\u672c\u8a9e\u5217\u304c\u6587\u5b57\u5316\u3051\u3059\u308b\u3053\u3068\u304c\u3042\u308b<\/li>\n<li><strong>BOM\u4ed8\u304d\u306eUTF-8<\/strong>\uff1aExcel\u306f\u6b63\u3057\u304fUTF-8\u3068\u8a8d\u8b58\u3057\u3066\u958b\u3051\u308b<\/li>\n<li><strong>\u4e00\u65b9\u3067BOM\u4ed8\u304d\u30d5\u30a1\u30a4\u30eb\u3092\u4ed6\u306e\u30c4\u30fc\u30eb\uff08\u4e00\u90e8\u306eCSV\u30d1\u30fc\u30b5\u3084\u30b3\u30de\u30f3\u30c9\u30e9\u30a4\u30f3\u30c4\u30fc\u30eb\uff09\u306b\u6e21\u3059\u3068\u3001\u5148\u982d\u5217\u306e\u5217\u540d\u306bBOM\u306e\u30d0\u30a4\u30c8\u5217\u304c\u6df7\u5165\u3057\u3066\u4e00\u81f4\u6bd4\u8f03\u306b\u5931\u6557\u3059\u308b<\/strong>\u3053\u3068\u304c\u3042\u308b<\/li>\n<\/ul>\n<p>\u3053\u306e\u305f\u3081\u3001GDE\u306e\u66f8\u304d\u51fa\u3057\u51e6\u7406\u3067\u306f\u300cExcel\u3067\u306e\u624b\u8efd\u306a\u78ba\u8a8d\u3092\u512a\u5148\u3059\u308b\u51fa\u529b\u300d\u306fBOM\u4ed8\u304dUTF-8\u3001\u300c\u4ed6\u30b7\u30b9\u30c6\u30e0\u3078\u306e\u9023\u643a\u3092\u512a\u5148\u3059\u308b\u51fa\u529b\u300d\u306fBOM\u7121\u3057UTF-8\u3001\u3068\u7528\u9014\u5225\u306b\u9078\u3079\u308b\u3088\u3046\u306b\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n<pre><code class=\"language-csharp\">\/\/ BOM\u4ed8\u304dUTF-8\u3067\u66f8\u304d\u51fa\u3059\nvar utf8Bom = new System.Text.UTF8Encoding(encoderShouldEmitUTF8Identifier: true);\nusing var writer = new StreamWriter(path, false, utf8Bom);\n\n\/\/ BOM\u7121\u3057UTF-8\u3067\u66f8\u304d\u51fa\u3059\nvar utf8NoBom = new System.Text.UTF8Encoding(encoderShouldEmitUTF8Identifier: false);\nusing var writerNoBom = new StreamWriter(path, false, utf8NoBom);\n<\/code><\/pre>\n<p>\u8aad\u307f\u8fbc\u307f\u5074\u3067\u3082\u3001BOM\u304c\u3042\u3063\u3066\u3082\u306a\u304f\u3066\u3082\u5217\u540d\u306e\u6bd4\u8f03\u304c\u5931\u6557\u3057\u306a\u3044\u3088\u3046\u3001\u5148\u982d\u5217\u540d\u304b\u3089BOM\u6587\u5b57\uff08<code>\ufeff<\/code>\uff09\u3092\u660e\u793a\u7684\u306b\u53d6\u308a\u9664\u304f\u51e6\u7406\u3092\u5165\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\n<hr \/>\n<h2 id=\"_1\">\u6570\u5024\u306e\u6841\u30fb\u4e38\u3081\u3092\u58ca\u3055\u306a\u3044\u66f8\u304d\u51fa\u3057<\/h2>\n<p>\u5ea7\u6a19\u5024\u3092CSV\u306b\u66f8\u304d\u51fa\u3059\u969b\u3001<code>ToString()<\/code>\u306e\u65e2\u5b9a\u306e\u6841\u6570\u3084\u30ab\u30eb\u30c1\u30e3\u8a2d\u5b9a\u306b\u983c\u308b\u3068\u3001\u610f\u56f3\u3057\u306a\u3044\u4e38\u3081\u3084\u533a\u5207\u308a\u6587\u5b57\u306e\u6df7\u5165\u304c\u8d77\u304d\u307e\u3059\u3002<\/p>\n<ul>\n<li><strong>\u65e2\u5b9a\u306e\u30ab\u30eb\u30c1\u30e3\u306b\u4f9d\u5b58\u3057\u306a\u3044<\/strong>\uff1a\u7aef\u672b\u306e\u5730\u57df\u8a2d\u5b9a\u306b\u3088\u3063\u3066\u306f\u3001\u5c0f\u6570\u70b9\u304c\u30ab\u30f3\u30de\u306b\u306a\u308b\uff08<code>,<\/code>\uff09\u30ab\u30eb\u30c1\u30e3\u3082\u3042\u308a\u3001CSV\u306e\u533a\u5207\u308a\u6587\u5b57\u3068\u885d\u7a81\u3059\u308b\u3002\u6570\u5024\u306e\u66f8\u5f0f\u6307\u5b9a\u306b\u306f\u5fc5\u305a<code>CultureInfo.InvariantCulture<\/code>\u3092\u4f7f\u3046<\/li>\n<li><strong>\u5fc5\u8981\u306a\u6841\u6570\u3092\u660e\u793a\u3059\u308b<\/strong>\uff1a\u7def\u5ea6\u7d4c\u5ea6\u306f\u5c0f\u6570\u70b9\u4ee5\u4e0b9\u6841\u524d\u5f8c\u3001\u5e73\u9762\u76f4\u89d2\u5ea7\u6a19\u306eXY\u30fb\u6a19\u9ad8\u306f\u30df\u30ea\u30e1\u30fc\u30c8\u30eb\u5358\u4f4d\u307e\u3067\u3001\u306a\u3069\u5ea7\u6a19\u7a2e\u5225\u3054\u3068\u306b\u66f8\u5f0f\u6587\u5b57\u5217\uff08<code>F9<\/code>\u30fb<code>F3<\/code>\u306a\u3069\uff09\u3092\u56fa\u5b9a\u3059\u308b<\/li>\n<li><strong>\u6307\u6570\u8868\u8a18\u3092\u907f\u3051\u308b<\/strong>\uff1a\u6975\u7aef\u306b\u5c0f\u3055\u3044\u5024\u30fb\u5927\u304d\u3044\u5024\u3067<code>ToString()<\/code>\u304c\u6307\u6570\u8868\u8a18\uff08<code>1.23E-05<\/code>\u306a\u3069\uff09\u3092\u8fd4\u3059\u3053\u3068\u304c\u3042\u308b\u305f\u3081\u3001\u66f8\u5f0f\u6307\u5b9a\u3067\u56fa\u5b9a\u5c0f\u6570\u8868\u8a18\u306b\u3059\u308b<\/li>\n<\/ul>\n<pre><code class=\"language-csharp\">double lat = 35.681236;\nstring s = lat.ToString(&quot;F9&quot;, System.Globalization.CultureInfo.InvariantCulture);\n\/\/ =&gt; &quot;35.681236000&quot;\uff08\u30ab\u30eb\u30c1\u30e3\u306b\u4f9d\u5b58\u305b\u305a\u3001\u5fc5\u305a\u30d4\u30ea\u30aa\u30c9\u533a\u5207\u308a\uff09\n<\/code><\/pre>\n<p>GeoConverterPro\uff08GCVP\uff09\u306eCSV\u5909\u63db\u6a5f\u80fd\u3067\u3082\u540c\u69d8\u306b\u3001<a href=\"https:\/\/gcpro.y42u.net\/2026\/05\/28\/csv-conversion-guide\/\">\u5165\u529bCSV\u306e\u5217\u540d\u30fb\u5ea7\u6a19\u5f62\u5f0f\u3092\u660e\u793a\u6307\u5b9a\u3059\u308b\u8a2d\u8a08<\/a>\u3092\u63a1\u3063\u3066\u3044\u307e\u3059\u304c\u3001GDE\u5074\u306f\u73fe\u5834\u3067\u306e\u8a08\u6e2c\u30ed\u30b0\u3068\u3044\u3046\u6027\u8cea\u4e0a\u3001\u6841\u6570\u306e\u56fa\u5b9a\u3068\u6307\u6570\u8868\u8a18\u306e\u56de\u907f\u3092\u7279\u306b\u610f\u8b58\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n<hr \/>\n<h2 id=\"_2\">\u30c6\u30b9\u30c8\u30c7\u30fc\u30bf\u306e\u4f5c\u308a\u65b9<\/h2>\n<p>\u6587\u5b57\u30b3\u30fc\u30c9\u30fbBOM\u30fb\u6539\u884c\u306e\u554f\u984c\u306f\u3001\u5b9f\u6a5f\u3067\u5076\u7136\u8e0f\u3080\u307e\u3067\u6c17\u3065\u304d\u306b\u304f\u3044\u30d0\u30b0\u3067\u3059\u3002GDE\u3067\u306f\u6b21\u306e\u3088\u3046\u306a\u30c6\u30b9\u30c8\u30c7\u30fc\u30bf\u3092\u3042\u3089\u304b\u3058\u3081\u7528\u610f\u3057\u3001\u5165\u51fa\u529b\u51e6\u7406\u306e\u5358\u4f53\u30c6\u30b9\u30c8\u306b\u4f7f\u3063\u3066\u3044\u307e\u3059\u3002<\/p>\n<ul>\n<li>UTF-8\uff08BOM\u4ed8\u304d\uff09\u30fbUTF-8\uff08BOM\u7121\u3057\uff09\u30fbShift-JIS\u306e3\u7a2e\u985e\u3067\u5185\u5bb9\u304c\u540c\u3058CSV\u30d5\u30a1\u30a4\u30eb<\/li>\n<li>\u6539\u884c\u30b3\u30fc\u30c9\u304cCRLF\u306e\u30d5\u30a1\u30a4\u30eb\u3068LF\u306e\u30d5\u30a1\u30a4\u30eb<\/li>\n<li>\u5217\u540d\u306b\u65e5\u672c\u8a9e\uff08\u5168\u89d2\uff09\u3092\u542b\u3080\u30d5\u30a1\u30a4\u30eb\u3068\u3001\u82f1\u6570\u5b57\u306e\u307f\u306e\u30d5\u30a1\u30a4\u30eb<\/li>\n<li>\u672b\u5c3e\u306b\u7a7a\u884c\u304c\u3042\u308b\u30d5\u30a1\u30a4\u30eb\u30fb\u672b\u5c3e\u30ab\u30f3\u30de\u304c\u3042\u308b\u30d5\u30a1\u30a4\u30eb<\/li>\n<li>\u6975\u7aef\u306a\u6570\u5024\uff080\u3001\u8ca0\u306e\u5ea7\u6a19\u3001\u975e\u5e38\u306b\u5c0f\u3055\u3044\/\u5927\u304d\u3044\u5c0f\u6570\uff09\u3092\u542b\u3080\u884c<\/li>\n<\/ul>\n<p>\u3053\u308c\u3089\u3092\u30c6\u30b9\u30c8\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u306e\u30ea\u30bd\u30fc\u30b9\u3068\u3057\u3066\u56fa\u5b9a\u3057\u3001\u8aad\u307f\u8fbc\u307f\u7d50\u679c\u304c\u671f\u5f85\u3069\u304a\u308a\u306e\u5024\u306b\u306a\u308b\u304b\u3001\u66f8\u304d\u51fa\u3057\u305f\u30d5\u30a1\u30a4\u30eb\u3092\u518d\u8aad\u307f\u8fbc\u307f\u3057\u3066\u5143\u306e\u5024\u3068\u4e00\u81f4\u3059\u308b\u304b\uff08\u5f80\u5fa9\u30c6\u30b9\u30c8\uff09\u3092\u78ba\u8a8d\u3057\u3066\u3044\u307e\u3059\u3002<a href=\"https:\/\/y42u.net\/tec001\/2026\/07\/12\/verification-driven-tests\/\">C#\u3067\u6e2c\u5730\u8a08\u7b97\u306e\u5358\u4f53\u30c6\u30b9\u30c8\u3092\u66f8\u304f<\/a>\u3067\u7d39\u4ecb\u3057\u305f\u691c\u8a3c\u5024\u30c9\u30ea\u30d6\u30f3\u306e\u8003\u3048\u65b9\u3068\u540c\u3058\u304f\u3001\u300c\u5b9f\u969b\u306b\u8d77\u304d\u308b\u30d1\u30bf\u30fc\u30f3\u300d\u3092\u30c6\u30b9\u30c8\u30c7\u30fc\u30bf\u3068\u3057\u3066\u56fa\u5b9a\u3057\u3066\u304a\u304f\u3053\u3068\u304c\u3001\u30d5\u30a1\u30a4\u30ebI\/O\u5468\u308a\u306e\u56de\u5e30\u3092\u9632\u3050\u4e00\u756a\u52b9\u679c\u7684\u306a\u65b9\u6cd5\u3060\u3068\u611f\u3058\u3066\u3044\u307e\u3059\u3002<\/p>\n<hr \/>\n<h2 id=\"_3\">\u307e\u3068\u3081<\/h2>\n<ul>\n<li>\u73fe\u5834\u306eCSV\u306f\u6587\u5b57\u30b3\u30fc\u30c9\u30fb\u5217\u9806\u30fb\u6539\u884c\u30b3\u30fc\u30c9\u304c\u30d0\u30e9\u30d0\u30e9\u3068\u3044\u3046\u524d\u63d0\u3067\u30b3\u30fc\u30c9\u3092\u66f8\u304f\u5fc5\u8981\u304c\u3042\u308b<\/li>\n<li>.NET\u3067Shift-JIS\/CP932\u3092\u6271\u3046\u306b\u306f<code>CodePagesEncodingProvider<\/code>\u306e\u767b\u9332\u304c\u5fc5\u9808<\/li>\n<li>BOM\u4ed8\u304d\/\u7121\u3057\u306fExcel\u3067\u306e\u898b\u3048\u65b9\u3068\u4ed6\u30c4\u30fc\u30eb\u3068\u306e\u9023\u643a\u306e\u3069\u3061\u3089\u3092\u512a\u5148\u3059\u308b\u304b\u3067\u4f7f\u3044\u5206\u3051\u308b<\/li>\n<li>\u6570\u5024\u306e\u66f8\u5f0f\u6307\u5b9a\u306f\u5fc5\u305a<code>InvariantCulture<\/code>\u3092\u4f7f\u3044\u3001\u6841\u6570\u3068\u6307\u6570\u8868\u8a18\u306e\u6709\u7121\u3092\u56fa\u5b9a\u3059\u308b<\/li>\n<li>\u6587\u5b57\u30b3\u30fc\u30c9\u30fb\u6539\u884c\u30fbBOM\u306e\u30d1\u30bf\u30fc\u30f3\u3092\u56fa\u5b9a\u3057\u305f\u30c6\u30b9\u30c8\u30c7\u30fc\u30bf\u3067\u5f80\u5fa9\u30c6\u30b9\u30c8\u3092\u884c\u3046\u3068\u3001\u5b9f\u6a5f\u3067\u3057\u304b\u8e0f\u307e\u306a\u3044\u30d0\u30b0\u3092\u4e8b\u524d\u306b\u691c\u51fa\u3057\u3084\u3059\u3044<\/li>\n<\/ul>\n<hr \/>\n<h3 id=\"_4\">\u95a2\u9023\u8a18\u4e8b<\/h3>\n<ul>\n<li><a href=\"https:\/\/gcpro.y42u.net\/2026\/05\/28\/csv-conversion-guide\/\">GeoConverterPro\u3067CSV\u30d5\u30a1\u30a4\u30eb\u306e\u5ea7\u6a19\u5909\u63db\u3092\u884c\u3046\u65b9\u6cd5\uff08GeoConverterPro\uff09<\/a><\/li>\n<li><a href=\"https:\/\/y42u.net\/tec001\/2026\/07\/10\/geocore-dual-implementation\/\">\u5ea7\u6a19\u5909\u63db\u30a8\u30f3\u30b8\u30f3\u3092Swift\u3068C#\u3067\u4e8c\u91cd\u5b9f\u88c5\u3059\u308b \u2014 \u7d50\u679c\u4e00\u81f4\u306e\u4fdd\u8a3c\uff08GeoDiveExa\uff09<\/a><\/li>\n<li><a href=\"https:\/\/y42u.net\/tec001\/2026\/07\/12\/verification-driven-tests\/\">C#\u3067\u6e2c\u5730\u8a08\u7b97\u306e\u5358\u4f53\u30c6\u30b9\u30c8\u3092\u66f8\u304f \u2014 \u691c\u8a3c\u5024\u30c9\u30ea\u30d6\u30f3\u958b\u767a\uff08GeoDiveExa\uff09<\/a><\/li>\n<li><a href=\"https:\/\/gmp.y42u.net\/2026\/07\/14\/canonical-file-for-ai\/\">\u6b63\u5178\u30d5\u30a1\u30a4\u30eb1\u679a\u3067AI\u306b\u6587\u8108\u3092\u6e21\u3059 \u2014 \u30ec\u30b8\u30b9\u30c8\u30ea\u65b9\u5f0f\u306e\u30c9\u30ad\u30e5\u30e1\u30f3\u30c8\u904b\u7528\uff08GeoPrism JP\uff09<\/a><\/li>\n<\/ul>\n<hr \/>\n<blockquote><p>\n<strong>\u958b\u767a\u8005\u3088\u308a<\/strong>: \u30a2\u30d7\u30ea\u30fbKindle\u672c\u30fb\u30aa\u30fc\u30d7\u30f3\u30bd\u30fc\u30b9\u306e\u4e00\u89a7\u306f <a href=\"https:\/\/github.com\/amru195704\">GitHub: amru195704<\/a> \u306b\u307e\u3068\u3081\u3066\u3044\u307e\u3059\u3002\n<\/p><\/blockquote>\n<hr \/>\n<blockquote><p>\n<strong>\u304a\u9858\u3044<\/strong><br \/>\n\u672c\u8a18\u4e8b\u306e\u60c5\u5831\u306f\u53c2\u8003\u76ee\u7684\u3067\u63b2\u8f09\u3057\u3066\u304a\u308a\u3001\u6b63\u78ba\u6027\u30fb\u5b8c\u5168\u6027\u3092\u4fdd\u8a3c\u3059\u308b\u3082\u306e\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u3002\u8aa4\u8a18\u30fb\u4e0d\u6b63\u78ba\u306a\u60c5\u5831\u304c\u3054\u3056\u3044\u307e\u3057\u305f\u3089\u3001\u30b3\u30e1\u30f3\u30c8\u6b04\u3088\u308a\u3054\u6307\u6458\u3044\u305f\u3060\u3051\u308c\u3070\u3001\u78ba\u8a8d\u306e\u3046\u3048\u4fee\u6b63\u3044\u305f\u3057\u307e\u3059\u3002\n<\/p><\/blockquote>\n","protected":false},"excerpt":{"rendered":"<p>MAUI\u3067CSV\u5165\u51fa\u529b\u3092\u5805\u7262\u306b\u3059\u308b \u2014 \u6587\u5b57\u30b3\u30fc\u30c9\u30fbBOM\u30fb\u6539\u884c\u306e\u5b9f\u52d9 GeoDiveExa\uff08GDE\uff09\u306f\u73fe\u5834\u3067\u8a08\u6e2c\u3057\u305f\u30c7\u30fc\u30bf\u3092CSV\u3067\u66f8\u304d\u51fa\u3057\u3001\u307e\u305f\u4ed6\u30b7\u30b9\u30c6\u30e0\u304b\u3089\u6e21\u3055\u308c\u305fCSV\u3092\u8aad\u307f\u8fbc\u3080\u5834\u9762\u304c\u3042\u308a\u307e\u3059\u3002\u5ea7\u6a19\u5909\u63db\u306e\u4e2d\u8eab\uff08\u6e2c [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":3345,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"sns_share_botton_hide":"","vkExUnit_sns_title":"","_vk_print_noindex":"","sitemap_hide":"","_veu_custom_css":"","veu_display_promotion_alert":"","vkexunit_cta_each_option":"","_jetpack_feature_clip_id":0,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2},"jetpack_post_was_ever_published":false},"categories":[1],"tags":[202,309,282,306,310,307,308],"class_list":["post-3346","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-uncategorized","tag-net-maui","tag-bom","tag-c","tag-csv","tag-excel","tag-shift-jis","tag-308"],"veu_head_title_object":{"title":"","add_site_title":""},"jetpack_publicize_connections":[],"jetpack_featured_media_url":"https:\/\/y42u.net\/tec001\/wp-content\/uploads\/2026\/07\/gde-robust-csv-maui.jpg","jetpack-related-posts":[],"jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/y42u.net\/tec001\/wp-json\/wp\/v2\/posts\/3346","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/y42u.net\/tec001\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/y42u.net\/tec001\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/y42u.net\/tec001\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/y42u.net\/tec001\/wp-json\/wp\/v2\/comments?post=3346"}],"version-history":[{"count":7,"href":"https:\/\/y42u.net\/tec001\/wp-json\/wp\/v2\/posts\/3346\/revisions"}],"predecessor-version":[{"id":3798,"href":"https:\/\/y42u.net\/tec001\/wp-json\/wp\/v2\/posts\/3346\/revisions\/3798"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/y42u.net\/tec001\/wp-json\/wp\/v2\/media\/3345"}],"wp:attachment":[{"href":"https:\/\/y42u.net\/tec001\/wp-json\/wp\/v2\/media?parent=3346"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/y42u.net\/tec001\/wp-json\/wp\/v2\/categories?post=3346"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/y42u.net\/tec001\/wp-json\/wp\/v2\/tags?post=3346"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}