\u6280\u8853\u30e1\u30eb\u30de\u30ac\u306e\u30cd\u30bf<\/p>\n
\u9752\u6728\u300c\u6587\u25cb\u5217\u3068\u8a00\u3048\u3070\u3001\u306a\uff5e\u3093\u3060\uff1f\u300d
\n\u7530\u4e2d\u300c\u5148\u8f29…\u4f0f\u5b57\u306b\u3057\u3066\u3082\u3001\u6587\u5b57\u5217\u3068\u3057\u3066\u304b\u8aad\u3081\u306a\u3044\u3093\u3067\u3059\u3051\u3069\u300d
\n\u9752\u6728\u300c\u307e\u3042\u3041\u3001\u305d\u3046\u304b\u3082\u306a\u3002\u4f0f\u5b57\u306b\u3059\u308b\u3068\u3001\u30a2\u30ec\u3060\u304b\u3089\u3001\u6587\u2661\u5217\u300d\u3063\u3066\u3044\u3046\u306e\u306f\u3069\u3046\u3060\uff1f\u300d
\n\u7530\u4e2d\u300c\u5148\u8f29…\u4f0f\u5b57\u3068\u3044\u3046\u304b\u3001\u306a\u3093\u3068\u3044\u3046\u304b\u3001\u6587\u5b57\u5217\u3067\u3059\u3088\u306d\u3002\u3084\u3063\u3071\u308a\u300d
\n\u9752\u6728\u300c\u305d\u3046\u304b\u3041\u3001\u305d\u3046\u306a\u308b\u3068\u3001\u6587\u5b57\u5217\u2661 \u3063\u3066\u3044\u3046\u306e\u306f\u3001\u3069\u3046\u3060\uff1f\u300d
\n\u7530\u4e2d\u300c…\u300d
\n\u9752\u6728\u300c\u307b\u3089\u3001\u3042\u3060\u3061\u5145\u304c\u958b\u767a\u3057\u305f\u3001\u306a\u3093\u3067\u3082\u30e9\u30d6\u30b3\u30e1\u306b\u306a\u3063\u3066\u3057\u307e\u3046\u3068\u3044\u3046\u3001\u6280\u3092\u541b\u306f\u77e5\u3089\u306a\u3044\u306e\u304b\uff1f\u300d
\n\u7530\u4e2d\u300c…\u300d
\n\u9752\u6728\u300c\u30b3\u30db\u30f3…\u3042\u3042\u3001\u79cb\u7a7a\u3002\u7a7a\u304c\u9ad8\u3044\u306a\u3041\u300d
\n\u7530\u4e2d\u300c\u76c6\u306b\u306f\u65e9\u3044\u3067\u3059\u304c…\u300d<\/p>\n
\u3060\u3044\u305f\u3044\u3001\u3053\u308c\u3060\u3051\u899a\u3048\u3066\u304a\u3051\u3070\u5927\u4e08\u592b\u3088\u3001\u3063\u3066\u306a\u611f\u3058\u3067\u3059\u3002
\n\u500b\u4eba\u7684\u306b\u306f String.IsNllOrEmpty \u306f\u4f7f\u3044\u305f\u304f\u306a\u3044\u3093\u3067\u3059\u3051\u3069\u306d\u3002\u78ba\u304b\u306b String \u578b\u306f Nothing\/Null \u304c\u5165\u308b\u306e\u3067\u3001null \u3092\u4ee3\u5165\u3057\u305f\u3068\u304d\u306b Length \u30d7\u30ed\u30d1\u30c6\u30a3\u3067\u30c1\u30a7\u30c3\u30af\u3059\u308b\u3068\u4f8b\u5916\u304c\u767a\u751f\u3057\u3066\u3057\u307e\u3046\u8a33\u3067\u3059\u304c\u3001\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u3067\u306e NULL \u3092\u6271\u3046\u306a\u3089\u3070\u3001\u660e\u793a\u7684\u306b Nullable \u3092\u4f7f\u3046\u307b\u3046\u304c\u4ed6\u3068\u306e\u5bfe\u5fdc\uff08nullable(of integer)\u3068\u304b\uff09\u304c\u3088\u3044\u304b\u306a\u3041\u3068\u3002<\/p>\n
\r\nImports System.Data.SqlClient\r\n\r\nPublic Class Form1\r\n\r\n '''\r\n ''' \u57fa\u672c\u7684\u306a\u3068\u3053\u308d\u3092\u3061\u3087\u308d\u3063\u3068\r\n '''\r\n ''' <param name="sender" \/>\r\n ''' <param name="e" \/>\r\n '''\r\n Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click\r\n\r\n Dim s1 As String = "\u666e\u901a\u306e\u521d\u671f\u5316"\r\n ' NULL \u3092\u5165\u308c\u308b\u3053\u3068\u304c\u3067\u304d\u308b\r\n Dim s2 As String = Nothing\r\n ' Empty \u3092\u5165\u308c\u308b\u3053\u3068\u304c\u3067\u304d\u308b\r\n Dim s3 As String = String.Empty\r\n#If False Then\r\n If s2.Length = 0 Then\r\n ' \u4f8b\u5916\u767a\u751f\r\n End If\r\n#End If\r\n If s3 = "" Then\r\n ' \u5b9f\u306f\u7a7a\u767d\u3068\u540c\u3058\r\n MessageBox.Show("\u5b9f\u306f\u7a7a\u767d\u3068\u540c\u3058")\r\n End If\r\n\r\n If String.IsNullOrEmpty(s2) = True Then\r\n MessageBox.Show("IsNullOrEmpty \u3092\u4f7f\u3046")\r\n End If\r\n\r\n ' \u76f4\u63a5\u6587\u5b57\u5217\u306b\u5bfe\u3057\u3066\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u3048\u308b\r\n Dim s4 As String = "tonny masuda".ToUpper\r\n MessageBox.Show(s4)\r\n\r\n End Sub\r\n\r\n '''\r\n ''' String \u306f\u5024\u578b\u6271\u3044\u306b\u306a\u308b\r\n '''\r\n ''' <param name="sender" \/>\r\n ''' <param name="e" \/>\r\n '''\r\n Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click\r\n Dim src As String = "tonny"\r\n Dim dest As String = ""\r\n ' \u6587\u5b57\u5217\u306f\u30b3\u30d4\u30fc\u3055\u308c\u308b\r\n dest = src\r\n ' \u30b3\u30d4\u30fc\u5143\u3092\u5909\u3048\u3066\u3082\u3001\u30b3\u30d4\u30fc\u5148\u306f\u5909\u308f\u3089\u306a\u3044\r\n src = "TONNY"\r\n MessageBox.Show( _\r\n String.Format("src is {0}. dest is {1}", src, dest))\r\n End Sub\r\n\r\n '''\r\n ''' ToString \u3092\u4f7f\u3063\u3066\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u3059\u308b\r\n '''\r\n ''' <param name="sender" \/>\r\n ''' <param name="e" \/>\r\n '''\r\n Private Sub Button3_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button3.Click\r\n ' \u65e5\u4ed8\u3092\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\r\n MessageBox.Show(Date.Now.ToString("yyyy\u5e74MM\u6708dd\u65e5"))\r\n ' \u6570\u5024\u3092\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\r\n Dim i As Integer = 1000\r\n MessageBox.Show(i.ToString("#,###\u5186"))\r\n ' \u30af\u30e9\u30b9\u540d\u306a\u3069\r\n Dim cn As New SqlConnection\r\n MessageBox.Show(cn.ToString)\r\n ' ToString \u3092 overrides \u3059\u308b\r\n Dim hello As New Hello\r\n hello.age = 40\r\n hello.name = "tonny masuda"\r\n MessageBox.Show(hello.ToString)\r\n End Sub\r\n\r\n '''\r\n ''' \u6587\u5b57\u5217\u306e\u9023\u7d50\u8af8\u3005\r\n '''\r\n ''' <param name="sender" \/>\r\n ''' <param name="e" \/>\r\n '''\r\n Private Sub Button4_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button4.Click\r\n\r\n ' + \u6f14\u7b97\u5b50\u3067\u9023\u7d50\r\n Dim s1 As String = "tonny" + " " + "masuda"\r\n ' & \u6f14\u7b97\u5b50\u3067\u9023\u7d50\r\n Dim s2 As String = "tonny" & " " & "masuda"\r\n ' \u6570\u5024\u304b\u3089\u6697\u9ed9\u306e\u5909\u63db\r\n Dim s3 As String = 1234\r\n ' \u6570\u5024\u3078\u6697\u9ed9\u306e\u5909\u63db\r\n Dim i4 As Integer = "1234"\r\n End Sub\r\n\r\n '''\r\n ''' \u3088\u304f\u4f7f\u308f\u308c\u308b String \u306e\u30e1\u30bd\u30c3\u30c9\r\n '''\r\n ''' <param name="sender" \/>\r\n ''' <param name="e" \/>\r\n '''\r\n Private Sub Button5_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button5.Click\r\n Dim s1 As String = "tonny masuda"\r\n\r\n ' \u6587\u5b57\u5217\u306e\u9577\u3055\r\n Dim i2 As Integer = s1.Length\r\n ' \u5148\u982d\u306e\u6587\u5b57\r\n Dim s3 As String = s1.Substring(0, 1)\r\n Dim s4 As String = s1(0)\r\n ' \u6700\u5f8c\u306e\u6587\u5b57\r\n Dim s5 As String = s1.Substring(s1.Length - 1, 1)\r\n Dim s6 As String = s1(s1.Length - 1)\r\n ' \u5927\u6587\u5b57\/\u5c0f\u6587\u5b57\r\n Dim s7 As String = s1.ToUpper\r\n Dim s8 As String = s1.ToLower\r\n ' \u524d\u5f8c\u306e\u7a7a\u767d\u3092\u524a\u9664\r\n Dim s9 As String = s1.Trim\r\n ' \u7f6e\u304d\u63db\u3048\r\n Dim s10 As String = s1.Replace("masuda", "\u5897\u7530")\r\n ' \u6307\u5b9a\u6587\u5b57\u5217\u3092\u524a\u9664\r\n Dim s11 As String = s1.Replace("\u7981\u5247\u4e8b\u9805\u3067\u3059\u30c3!!!", "")\r\n ' \u5148\u982d\u306e5\u6587\u5b57\u3060\u3051\u6b8b\u3059\r\n Dim s12 As String = s1.Substring(0, 5)\r\n Dim s13 As String = s1.Remove(5)\r\n ' \u5de6\u5bc4\u305b\/\u53f3\u5bc4\u305b\r\n Dim s14 As String = s1.PadRight(20)\r\n Dim s15 As String = s1.PadLeft(20, "\u25cb")\r\n MessageBox.Show(s15)\r\n\r\n End Sub\r\nEnd Class\r\n\r\n'''\r\n''' ToString \u3092 overrides \u3057\u305f\u30af\u30e9\u30b9\r\n'''\r\n'''\r\nPublic Class Hello\r\n Public age As Integer\r\n Public name As String\r\n\r\n Public Overrides Function ToString() As String\r\n Return String.Format("\u30aa\u30e9 {0}. \u5e74\u9f62 {1} \u6b73\u3060\u3051\u3069\u3001\u3088\u308d\u3057\u304f\u306a\u30c3!!!", name, age)\r\n End Function\r\nEnd Class\r\n\r\n<\/pre>\n","protected":false},"excerpt":{"rendered":"\u6280\u8853\u30e1\u30eb\u30de\u30ac\u306e\u30cd\u30bf \u9752\u6728\u300c\u6587\u25cb\u5217\u3068\u8a00\u3048\u3070\u3001\u306a\uff5e\u3093\u3060\uff1f\u300d \u7530\u4e2d\u300c\u5148\u8f29…\u4f0f\u5b57\u306b\u3057\u3066\u3082\u3001\u6587\u5b57\u5217\u3068\u3057\u3066\u304b\u8aad\u3081\u306a\u3044\u3093\u3067\u3059\u3051\u3069\u300d \u9752\u6728\u300c\u307e\u3042\u3041\u3001\u305d\u3046\u304b\u3082\u306a\u3002\u4f0f\u5b57\u306b\u3059\u308b\u3068\u3001\u30a2\u30ec\u3060\u304b\u3089\u3001\u6587\u2661\u5217\u300d\u3063\u3066\u3044\u3046\u306e\u306f\u3069\u3046\u3060\uff1f\u300d \u7530\u4e2d\u300c … \u7d9a\u304d\u3092\u8aad\u3080