VB.NET 数据库查询 [SQL字符串的生成]

---------SQL生成----------
任务是当用户以逗号来分隔查询的条件，的多条件查询，使用IN(x,y)，但是当在数据库(ACCESS)对应的字段是字符型是就会出现错误，那是当然的！如果是IN(@#x@#,@#y@#)就没有问题！
下面的代码就是对字符串的操作，返回 @#x@#,@#y@#。

@#-----接受要处理的字符串-------
Function Tool_disTest(ByVal TextBefore As String)
Dim TextAfter() As String
Dim intNum, intTextLen, k, i As Integer
intNum = 1
intTextLen = Len(TextBefore)
@#--------计算有多少的查询条件--------
For i = 1 To intTextLen
If Mid(TextBefore, i, 1) = "," Then
intNum = intNum + 1
End If
Next
@#-----------------------------------
ReDim TextAfter(intNum)
k = 1
@#--------把每个条件放到数组里---------
For i = 1 To intTextLen
If Mid(TextBefore, i, 1) = "," Then
k += 1
Else
TextAfter(k) = TextAfter(k) & Mid(TextBefore, i, 1)
End If
Next
@#----------------------
Dim strTemp As String
@#--------为每一个条件加上@#@#----------
For i = 1 To intNum
strTemp = TextAfter(i)
TextAfter(i) = "@#" & strTemp & "@#"
Next
@#----------------------
strTemp = ""
@#------添加分隔条件用的","------
For i = 1 To intNum
strTemp = strTemp & TextAfter(i) & ","
Next
@#------------------
@#------去除最后一个,------
strTemp = Mid(strTemp, 1, Len(strTemp) - 1)
@#-------------------
Return strTemp
End Function

最后在SQLServer中又试了试，发现SQLServer查询的时候用IN(x,y)来查询字符型是OK的,(SQLServer就是比ACCESS强点,呵呵)
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原文转自：http://www.ltesting.net