VB.Net学习笔记（面向对象的基本数据类型）

这些基本类型也象类一样拥有各自的方法和属性，熟练运用它们能让你的程序更优雅和更有面向对象的味道。



基本类型的重要方法和属性举例

Dim i As Int32

Dim s As String

Dim ss() As String

Dim by As Byte

Dim d As Double

Dim b As Boolean

Dim da As Date

Dim c As Char

Dim cc() As Char



@#整数操作

i = Int32.Parse("￥123", Globalization.NumberStyles.AllowCurrencySymbol) @#123

i = Int32.MaxValue @#2147483647

i = Int32.MinValue @#-2147483648

by = Byte.Parse("1") @#1

@#浮点数操作

d = Double.PositiveInfinity @#正无穷大

d = Double.Epsilon @#4.94065645841247E-324

@#布尔操作

s = Boolean.TrueString @#True

@#日期操作

da = Date.MaxValue @#9999-12-31 23:59:59

da = Date.MinValue @#0:00:00

da = Date.Now @#2004-5-7 13:17:35

b = Date.IsLeapYear(2004) @#True

i = Date.DaysInMonth(2004, 5) @#31

@#以下方法用于判断字符的特性

Char.IsControl(c)

Char.IsDigit(c)

Char.IsLetter(c)

Char.IsLetterOrDigit(c)

Char.IsLower(c)

Char.IsNumber(c)

Char.IsPunctuation(c)

Char.IsSeparator(c)

Char.IsSurrogate(c)

Char.IsSymbol(c)

Char.IsWhiteSpace(c)

Char.IsUpper(c)

@#Char转换

Char.ToLower(c)

Char.ToUpper(c)

@#字符串操作

cc = s.ToCharArray()

ss = s.Split(",")

s = s.Substring(5, 3)

s = s.Trim()

原文转自：http://www.ltesting.net