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VB.netでの日時、ミリ秒、フォーマット変換、おまけで乱数

Last updated at 2019-01-22Posted at 2019-01-21

        Dim myRnd As String

        '--- 乱数初期化
        Randomize(Double.Parse(Format(Now(), "hhmmssfff")))　　'fffはミリ秒3桁

        '4桁の乱数を作成
        For x = 1 To 4
            '0～9の範囲の乱数を取得して文字列として結合
            myRnd = myRnd & CStr(Int((9 - 0 + 1) * Rnd() + 0))
        Next x
        Dim strRes As String = "ABC-" & Format(CType(Now, Date), "yyyyMMddHHmmssfff") & "-" & myRnd
         
        
        strRes →　ABC-20190121150037123-5678
                  a   b       c     d   e   
                
         -a → "ABC-"　　       固定値  
         -b → "20190121"　　　 日付
         -c → "150037"   　　　時刻
         -d → "123"      　　　ミリ秒
         -e → "5678"     　　　乱数

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