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vb.net轉(zhuǎn)換ass,vb60轉(zhuǎn)net

VB.NET中怎么將16進(jìn)制數(shù)換成對應(yīng)的ASCII,比如說&H1000,怎么把他換成31H,30H,30H,30H

Public Function dec_to_hex(dec As Long) As String

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Dim a As String

dec_to_hex = ""

Do While dec 0

a = CStr(dec Mod 16)

Select Case a

Case "0": a = "30H"

Case "1": a = "31H"

Case "2": a = "32H"

Case "3": a = "33H"

Case "4": a = "34H"

Case "5": a = "35H"

Case "6": a = "36H"

Case "7": a = "37H"

Case "8": a = "38H"

Case "9": a = "30H"

Case "10": a = "65H"

Case "11": a = "66H"

Case "12": a = "67H"

Case "13": a = "68H"

Case "14": a = "69H"

Case "15": a = "70H"

End Select

dec_to_hex = a " " dec_to_hex

dec = dec \ 16

Loop

End Function

vb.net字符串 替換

x="a[11dsfsf]b"

b=x.lastindexof("]")

a=x.indexof("[")

x=x.substring(0,a) "0" x.substring(b)

vb.net,強(qiáng)類型轉(zhuǎn)換

這屬于裝箱拆箱。我舉個(gè)例子你就明白了:

Dim x As Integer = 5

Dim o As Object = x '裝箱

Dim y As Integer = CType(o, Integer) '拆箱(在Option Strict Off的情況下,直接用o給y賦值,會(huì)發(fā)生自動(dòng)轉(zhuǎn)換,也就是說在這種情況下,你不必顯式調(diào)用CType函數(shù))

另外:VB.NET支持后期綁定,所以你也可以不進(jìn)行拆箱,直接在Object類型下就可以調(diào)用它的屬性和方法

比如,下面的語句在Option Strict Off是是合法的

Dim s As String = 886

Dim i As Integer = "53"

Dim f As Object = New Form()

f.Show() '注意,f是Object類型的

總之,VB.NET的語法要比C#靈活得多

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