vb點虐 大小寫字母轉(zhuǎn)換

Private Sub Button6_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button6.Click

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Dim s As String = "0Ff0ajkh04624F"

Dim i As Integer = 0

Dim sTemp As String = ""

Dim ss As String = ""

For i = 1 To Strings.Len(s)

sTemp = Mid(s, i, 1)

If Asc(sTemp) = 65 And Asc(sTemp) = 90 Then

sTemp = LCase(sTemp)

ElseIf Asc(sTemp) = 95 And Asc(sTemp) = 122 Then

sTemp = UCase(sTemp)

Else

sTemp = sTemp

End If

ss = ss sTemp

Next

MsgBox(ss)

End Sub

VB.NET代碼不區(qū)分字母的大小寫是什么意思??？

就是你在寫代碼是用大寫字母和小寫字母vb點虐 認(rèn)為都一樣，沒區(qū)別。你定義變量時Abc

使用時 用abc 它自動會把 abc改成Abc。

VB點虐 2008 為何正則表達(dá)式的忽略大小寫的功能失效？

Dim?Regex?As?System.Text.RegularExpressions.Regex??'這個是常量對象，參數(shù)要在構(gòu)造函數(shù)中設(shè)定，以后就不能更改，就是下面這句

Regex?=?New?System.Text.RegularExpressions.Regex("you",?System.Text.RegularExpressions.RegexOptions.Singleline?Or?System.Text.RegularExpressions.RegexOptions.IgnoreCase)??'創(chuàng)建正則表達(dá)式實例，匹配模式是you

Dim?Matchs?As?System.Text.RegularExpressions.MatchCollection

Dim?Match?As?System.Text.RegularExpressions.Match

'Dim?Ops?As?RegexOptions?=?RegexOptions.IgnoreCase?+?RegexOptions.Singleline?,什么情況，這與Regex對象不搭邊，當(dāng)然起不了作用了

Dim?IsMatch?As?Boolean?=?Regex.IsMatch("?1?You??you?yOU?yoU")

Matchs?=?Regex.Matches(("?1?You??you?yOU?yoU"))

Dim?a?As?Integer?=?Matchs.Count

MsgBox(a)

Dim?sItems?As?String?=?""

For?Each?Match?In?Matchs

sItems?+=?Match.Value??vbCrLf

Next

MsgBox(sItems)

Dim?s?=?Regex.Replace("?1?You??you?yOU?yoU",?"me",?1)?'后一個參數(shù)是替換次數(shù)

MsgBox(s)