哥哥姐姐求助！无效使用 Null: 'CStr'

[丁丁棒]

Microsoft VBScript 运行时错误 错误 '800a005e'

无效使用 Null: 'CStr'

/index.asp，行 41

相关代码如下：If Not MM_rsUser.EOF Or Not MM_rsUser.BOF Then
' username and password match - this is a valid user
Session("MM_Username") = MM_valUsername
If (MM_fldUserAuthorization <> "") Then
Session("MM_UserAuthorization") = CStr(MM_rsUser.Fields.Item(MM_fldUserAuthorization).Value)
Else
Session("MM_UserAuthorization") = ""
End If
if CStr(Request.QueryString("accessdenied")) <> "" And false Then
MM_redirectLoginSuccess = Request.QueryString("accessdenied")
End If
MM_rsUser.Close
Response.Redirect(MM_redirectLoginSuccess)
End If
MM_rsUser.Close
Response.Redirect(MM_redirectLoginFailed)
End If

我不知道CStr怎么了。

[slwsss]

CStr(Request.QueryString("accessdenied")) 这个不需要CStr CStr(MM_rsUser.Fields.Item(MM_fldUserAuthorization).Value) 先判断下null

[hookee]

CStr都没有必要 s = MM_rsUser.Fields.Item(MM_fldUserAuthorization).Value If Not IsNUll(s) Then Session("MM_UserAuthorization") = CStr(s) 也可以直接用Trim