asp.net默认的编码为utf-8，当与其它平台交互处理的字符串中有中文时往往会出现乱码，这是由于其它平台多采取GB2312编码，要解决这一问题，可编写一个函数，对字符串先转换再处理就行了，下面是该函数的源代码：
Imports System.Math
Function URLEncoding(ByVal vstrIn As String)
Dim strReturn As String
strReturn = ""
Dim i As Integer
Dim ThisChr As String
Dim innerCode, Hight8, Low8 As Integer
For i = 1 To vstrIn.Length
ThisChr = Mid(vstrIn, i, 1)
If Abs(Asc(ThisChr)) < &HFF Then
strReturn = strReturn & ThisChr
Else
innerCode = Asc(ThisChr)
If innerCode < 0 Then
innerCode = innerCode + &H10000
End If
Hight8 = (innerCode And &HFF00) \ &HFF
Low8 = innerCode And &HFF
strReturn = strReturn & "%" & Hex(Hight8) & "%" & Hex(Low8)
End If
Next
URLEncoding = strReturn
End Function