{"id":8527,"date":"2019-01-26T10:08:25","date_gmt":"2019-01-26T01:08:25","guid":{"rendered":"https:\/\/elleneast.com\/?p=8527"},"modified":"2019-03-29T16:28:52","modified_gmt":"2019-03-29T07:28:52","slug":"%e3%80%90vb-net%e3%80%91%e9%96%a2%e6%95%b0%e3%81%ae%e5%bc%95%e6%95%b0%e3%81%a7-optional-%e3%81%ae-timespan-%e3%82%92%e4%bd%bf%e3%81%84%e3%81%9f%e3%81%84%e5%a0%b4%e5%90%88%e3%81%ae%e5%9b%9e%e9%81%bf","status":"publish","type":"post","link":"https:\/\/elleneast.com\/?p=8527","title":{"rendered":"\u3010VB.NET\u3011\u95a2\u6570\u306e\u5f15\u6570\u3067 Optional \u3092\u4f7f\u7528\u3059\u308b\u3068\u300c\u5b9a\u6570\u5f0f\u304c\u5fc5\u8981\u3067\u3059\u3002\u300d\u3068\u6012\u3089\u308c\u308b\u5834\u5408\u306e\u56de\u907f\u7b56"},"content":{"rendered":"

\u95a2\u6570\u306e\u5f15\u6570\u3067 TimeSpan \u3092 Optional \u3068\u3057\u3066\u4f7f\u3044\u305f\u3044\u5834\u9762\u304c\u3042\u3063\u305f\u3002\u3064\u307e\u308a\u4e0b\u8a18\u306e\u3088\u3046\u306b\u4f7f\u3044\u305f\u3044\u3002<\/p>\n

\n

Sub Test(Optional oTimeSpan As TimeSpan = New TimeSpan(0, 0, 0))<\/p>\n

\uff1a<\/p>\n

End Sub<\/p>\n<\/div>\n

\u3067\u3082\u4e0a\u8a18\u306e\u3088\u3046\u306a\u66f8\u304d\u65b9\u3092\u3059\u308b\u3068\u30fb\u30fb\u30fb<\/p>\n

\"\"<\/a><\/p>\n

\u300c\u5b9a\u6570\u5f0f\u304c\u5fc5\u8981\u3067\u3059\u3002\u300d\u3068\u6012\u3089\u308c\u3066\u3057\u307e\u3044\u307e\u3057\u305f\u3002<\/p>\n

\u3053\u306e\u5834\u9762\u3067\u521d\u671f\u5024\u3068\u3057\u3066\u3069\u3093\u306a\u5b9a\u6570\u5f0f\u304c\u4f7f\u3048\u308b\u304b\u8abf\u3079\u3066\u307f\u307e\u3057\u305f\u304c\u3001\u6307\u5b9a\u3067\u304d\u305d\u3046\u306a\u306e\u306f Nothing \u3057\u304b\u7121\u3055\u305d\u3046\u3067\u3057\u305f\u3002Nothing \u3092\u6307\u5b9a\u3059\u308b\u3068\u3001\u3068\u308a\u3042\u3048\u305a\u30a8\u30e9\u30fc\u306b\u306a\u308a\u307e\u305b\u3093\u3002<\/p>\n

\"\"<\/a><\/p>\n

\u3057\u304b\u3057\u3053\u306e\u307e\u307e\u5b9f\u884c\u3059\u308b\u3068\u3001\u5f53\u7136\u3001\u30a8\u30e9\u30fc\u306b\u306a\u308b\u306e\u3067\u3001Nothing \u3092\u51e6\u7406\u3059\u308b\u30b3\u30fc\u30c9\u3092\u52a0\u3048\u3066\u307f\u307e\u3059\u3002\u305d\u3046\u3059\u308b\u3068\u30fb\u30fb\u30fb<\/p>\n

\"\"<\/a><\/p>\n

\u300c\u2019Is\u2019 \u6f14\u7b97\u5b50\u306f\u578b \u2018TimeSpan\u2019 \u306e\u30aa\u30da\u30e9\u30f3\u30c9\u3092\u53d7\u3051\u4ed8\u3051\u307e\u305b\u3093\u3002\u30aa\u30da\u30e9\u30f3\u30c9\u306f\u53c2\u7167\u578b\u307e\u305f\u306f Null \u8a31\u5bb9\u578b\u3067\u306a\u3051\u308c\u3070\u306a\u308a\u307e\u305b\u3093\u3002\u300d\u3068\u3044\u3046\u30a8\u30e9\u30fc\u304c\u51fa\u3066\u3057\u307e\u3044\u307e\u3057\u305f\u3002<\/p>\n

TimeSpan \u306e\u578b\u306f\u6c7a\u3081\u3089\u308c\u3066\u3044\u308b\u306e\u3067\u3001\u305d\u308c\u3092\u53c2\u7167\u578b\u306b\u3059\u308b\u3053\u3068\u306f\u3067\u304d\u307e\u305b\u3093\uff08\u53c2\u7167\u6e21\u3057\u306e\u5f15\u6570\u3068\u6df7\u540c\u3057\u306a\u3044\u3088\u3046\u306b\uff09\u3002\u3068\u3044\u3046\u3053\u3068\u3067 TimeSpan \u3092\u300cNull \u8a31\u5bb9\u578b\u300d\u306b\u3057\u3066\u307f\u307e\u3057\u3087\u3046\u3002<\/p>\n

\u300cNull \u8a31\u5bb9\u578b\u300d\uff08\u300c Nothing \u8a31\u5bb9\u578b\u300d\u3068\u8a00\u3046\u3079\u304d\u304b\uff09\u306b\u3059\u308b\u306b\u306f\u3001\u4e0b\u56f3\u306e\u3088\u3046\u306b\u3001\u578b\u5ba3\u8a00\u306e\u672b\u5c3e\u306b\u30af\u30a8\u30b9\u30b7\u30e7\u30f3\u30de\u30fc\u30af \u201c?\u201d \u3092\u4ed8\u3051\u3066 As TimeSpan? \u3068\u66f8\u304d\u307e\u3059\u3002\uff08\u307e\u305f\u306f  As Nullable(Of TimeSpan) \u3068\u66f8\u3044\u3066\u3082\u540c\u3058\uff09<\/p>\n

\"\"<\/a><\/p>\n

\u3057\u304b\u3057\u4eca\u5ea6\u306f\u5225\u306e\u3068\u3053\u308d\u3067\u300c\u2019TotalSeconds\u2019 \u306f \u2018TimeSpan?\u2019 \u306e\u30e1\u30f3\u30d0\u30fc\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u3002\u300d\u3068\u8a00\u308f\u308c\u3066\u3057\u307e\u3044\u307e\u3057\u305f\u3002\u300cNull \u8a31\u5bb9\u578b\u300d\u306b\u3057\u305f TimeSpan \u306e\u30e1\u30f3\u30d0\u3092\u53c2\u7167\u3059\u308b\u306b\u306f\u3001\u30c9\u30c3\u30c8 \u201c.\u201d \u3067\u306f\u306a\u304f\u3001\u30af\u30a8\u30b9\u30b7\u30e7\u30f3\u30de\u30fc\u30af\u3068\u30c9\u30c3\u30c8 \u201c?.\u201d \u3092\u4f7f\u3046\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n

\u201coTimeSpan.<\/span><\/strong>TotalSeconds\u201d \u3092 \u201coTimeSpan?.<\/span><\/strong>TotalSeconds\u201d \u306b\u66f8\u304d\u76f4\u3057\u3066\u307f\u308b\u3068\u3001\u30a8\u30e9\u30fc\u304c\u51fa\u306a\u304f\u306a\u308a\u307e\u3057\u305f\u3002\uff08\u52d5\u4f5c\u30c6\u30b9\u30c8\u3082\u554f\u984c\u3042\u308a\u307e\u305b\u3093\u3067\u3057\u305f\uff09<\/p>\n

\"\"<\/a><\/p>\n

\u30c6\u30ad\u30b9\u30c8\u306e\u30b3\u30fc\u30c9\u3082\u4e0b\u8a18\u306b\u8f09\u305b\u3066\u304a\u304d\u307e\u3059\u3002<\/p>\n

Private Sub Test(Optional oTimeSpan As TimeSpan? = Nothing)\n\nIf oTimeSpan Is Nothing Then\n    oTimeSpan = New TimeSpan(0, 0, 0)\nEnd If\n\nConsole.WriteLine(oTimeSpan?.TotalSeconds.ToString)\n\nEnd Sub<\/pre>\n
\u4ee5\u4e0a\u304c\u3001\u95a2\u6570\u306e\u5f15\u6570\u3067 TimeSpan \u3092 Optional \u3068\u3057\u3066\u4f7f\u3044\u305f\u3044\u5834\u5408\u306e\u56de\u907f\u7b56\u3067\u3059\u3002<\/p>\n
TimeSpan \u3060\u3051\u3067\u306a\u304f\u3001Optional \u3092\u4f7f\u7528\u3059\u308b\u3068\u300c\u5b9a\u6570\u5f0f\u304c\u5fc5\u8981\u3067\u3059\u3002\u300d\u3068\u6012\u3089\u308c\u308b\u5834\u5408\u306b\u306f\u4f7f\u3048\u305d\u3046\u306a\u30c6\u30af\u30cb\u30c3\u30af\u3067\u3059\u306d\u3002<\/p>\n
\n
 MEMO<\/div>\n
\u4f59\u8ac7\u3067\u3059\u304c\u3001\u306a\u306b\u3052\u306a\u304f\u4e0b\u8a18\u306e\u3088\u3046\u306b\u66f8\u3044\u305f\u3068\u3053\u308d\u3001\u30a8\u30e9\u30fc\u304c\u51fa\u305a\u306b\u6b63\u5e38\u306b\u52d5\u4f5c\u3057\u3066\u3044\u308b\u3088\u3046\u3067\u3057\u305f\u3002\uff08TimeSpan \u578b\u306e\u5909\u6570\u304c Nothing \u304b\u3069\u3046\u304b\u3092\u30a4\u30b3\u30fc\u30eb\u8a18\u53f7 \u201c=\u201d \u3067\u8abf\u3079\u3066\u3044\u307e\u3059\uff09<\/p>\n
\"\"<\/a><\/p>\n
\u53c2\u7167\u578b\u306e\u5909\u6570\u306e\u5834\u5408\u3001Nothing \u304b\u3069\u3046\u304b\u3092\u8abf\u3079\u308b\u306b\u306f Is Nothing \u307e\u305f\u306f IsNot Nothing \u3092\u4f7f\u3046\u306e\u304c\u666e\u901a\u3067\u3059\u304c\u3001\u5024\u578b\u306e\u5909\u6570\u306e\u5834\u5408\u3001\u201d=\u201d \u3084 \u201c<>\u201d \u3092\u4f7f\u3046\u3053\u3068\u304c\u3067\u304d\u308b\u3068\u306e\u3053\u3068\u3067\u3059\u3002<\/p>\n
\u305f\u3060\u3057\u3001\u3053\u306e\u5834\u5408\u3001\u5b9f\u969b\u306b\u306f\u305d\u306e\u5909\u6570\u304c\u300cNothing \u304b\u3069\u3046\u304b\u300d\u3092\u8abf\u3079\u3066\u3044\u308b\u306e\u3067\u306f\u306a\u304f\u3001\u305d\u306e\u5909\u6570\u304c\u300c\u521d\u671f\u5024\u306e\u72b6\u614b\u304b\u300d\u3092\u8abf\u3079\u3066\u3044\u308b\u3053\u3068\u306b\u306a\u308a\u3001\u6df7\u4e71\u3092\u5f15\u304d\u8d77\u3053\u3059\u539f\u56e0\u306b\u306a\u308a\u5f97\u308b\u306e\u3067\u3001\u3053\u306e\u3088\u3046\u306a\u66f8\u304d\u65b9\u306f\u907f\u3051\u305f\u307b\u3046\u304c\u826f\u3044\u3088\u3046\u3067\u3059\u3002<\/p>\n<\/div>\n
\n
 MEMO<\/div>\n
Visual Studio 2017 \u307e\u3067\u306f\u3001\u53c2\u7167\u578b\u3092\u300cNull \u8a31\u5bb9\u578b\u300d\u306b\u3059\u308b\u3053\u3068\u306f\u3067\u304d\u307e\u305b\u3093\u3067\u3057\u305f\u304c\u3001C# 8.0\uff08Visual Studio 2018\uff1f\uff09\u304b\u3089\u306f\u53c2\u7167\u578b\u3082\u300cNull \u8a31\u5bb9\u578b\u300d\u306b\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u308b\u3088\u3046\u3067\u3059\u3002<\/p>\n
\u305d\u308c\u306b\u4f34\u3063\u3066\u3001\u53c2\u7167\u578b\u3082\u5024\u578b\u3082\u30c7\u30d5\u30a9\u30eb\u30c8\u3067\u306f Null \u3092\u8a31\u5bb9\u3057\u306a\u304f\u306a\u308a\u3001\u300cNull \u8a31\u5bb9\u578b\u300d\u306e\u6307\u5b9a\u3092\u3057\u305f\u5834\u5408\u306b\u9650\u308a Null \u3092\u4f7f\u3048\u308b\u3088\u3046\u306b\u7d71\u4e00\u3055\u308c\u308b\u3068\u304b\u3002\u3067\u3082\u3044\u304d\u306a\u308a\u5909\u66f4\u3059\u308b\u3068\u6df7\u4e71\u304c\u8d77\u304d\u308b\u306e\u3067\u3001\u5f53\u9762\u306f\u3001\u904e\u53bb\u306e\u30b3\u30fc\u30c9\u3082\u6b63\u5e38\u306b\u52d5\u304f\u3088\u3046\u306b\u3001\u30aa\u30d7\u30b7\u30e7\u30f3\u3068\u3057\u3066\u5b9f\u88c5\u3055\u308c\u308b\u3088\u3046\u3067\u3059\u3002<\/p>\n
\uff08\u53c2\u8003\uff09Essential .NET \u2013 C# 8.0 \u3068 Null \u8a31\u5bb9\u53c2\u7167\u578b<\/a><\/p>\n<\/div>\n
 <\/p>\n","protected":false},"excerpt":{"rendered":"
\u95a2\u6570\u306e\u5f15\u6570\u3067 TimeSpan \u3092 Optional \u3068\u3057\u3066\u4f7f\u3044\u305f\u3044\u5834\u9762\u304c\u3042\u3063\u305f\u3002\u3064\u307e\u308a\u4e0b\u8a18\u306e\u3088\u3046\u306b\u4f7f\u3044\u305f\u3044\u3002 Sub Test(Optional oTimeSpan As TimeSpan = New TimeSpan … <\/p>\n","protected":false},"author":1,"featured_media":2656,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"footnotes":""},"categories":[57],"tags":[60],"class_list":{"0":"post-8527","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-57","8":"tag-vb-net"},"_links":{"self":[{"href":"https:\/\/elleneast.com\/index.php?rest_route=\/wp\/v2\/posts\/8527","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/elleneast.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/elleneast.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/elleneast.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/elleneast.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=8527"}],"version-history":[{"count":3,"href":"https:\/\/elleneast.com\/index.php?rest_route=\/wp\/v2\/posts\/8527\/revisions"}],"predecessor-version":[{"id":9619,"href":"https:\/\/elleneast.com\/index.php?rest_route=\/wp\/v2\/posts\/8527\/revisions\/9619"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/elleneast.com\/index.php?rest_route=\/wp\/v2\/media\/2656"}],"wp:attachment":[{"href":"https:\/\/elleneast.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=8527"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/elleneast.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=8527"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/elleneast.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=8527"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}