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ASP教程:ASP是不区分大小写
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众所周知：asp(VBS)是不区分大小写的，但是你要理解这句话的意思，请看下面实例
Test.asp
<%
Dim aName
If Request.QueryString("name") <> "" Then
aName = Trim(Request.QueryString("name"))
Select Case aName
Case "new"
Response.Write "New"
Response.End
Case "top"
Response.Write "Top"
Response.End
Case Else
Response.Write "Other"
Response.End
End Select
Else
Response.Write "No Value"
Response.End
End If
%>
Dim aName
If Request.QueryString("name") <> "" Then
aName = Trim(Request.QueryString("name"))
Select Case aName
Case "new"
Response.Write "New"
Response.End
Case "top"
Response.Write "Top"
Response.End
Case Else
Response.Write "Other"
Response.End
End Select
Else
Response.Write "No Value"
Response.End
End If
%>
如果你执行http://localhost/test.asp?name=new，它会输出：New
而如果执行http://localhost/test.asp?name=New，它却输出：Other
所以确保不出现意想不到的错误，在select Case中先将条件转成大/小写，这样
<%
Dim aName
If Request.QueryString("name") <> "" Then
aName = LCase(Request.QueryString("name"))
Select Case aName
Case "new"
Response.Write "New"
Response.End
Case "top"
Response.Write "Top"
Response.End
Case Else
Response.Write "Other"
Response.End
End Select
Else
Response.Write "No Value"
Response.End
End If
%>
Dim aName
If Request.QueryString("name") <> "" Then
aName = LCase(Request.QueryString("name"))
Select Case aName
Case "new"
Response.Write "New"
Response.End
Case "top"
Response.Write "Top"
Response.End
Case Else
Response.Write "Other"
Response.End
End Select
Else
Response.Write "No Value"
Response.End
End If
%>
总之，要理解VB不区分大小写的意思是什么...
对象名、属性名、变量名等本身构成的语法不区分大小写
然而属性值、变量值区分大小写，也就是说："A"="a"为false
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