我正在创建一个界面,用户可以在其中使用excel来无缝更改SQL数据库。我可以很好地检索数据,但是在更新记录时,我得到的是“无效的参数类型”。
仅将值连接到查询中就可以正常工作,但是为了防止SQL注入,我需要一个参数化查询。我尝试用ADO数据类型替换该值,但是这并没有改变任何内容。我尝试了未命名的参数,这些参数始终向数据库提交值16而不是所需的字符串值
Private Sub Worksheet_Change(ByVal Target As Range)
ID = Cells(Target.Row, 1).Value
Dim locValue As String
locValue = Cells(Target.Row, 2).Value
Dim Cm As ADODB.Command
Set Cm = New ADODB.Command
Cm.NamedParameters = True
Cm.CommandText = "UPDATE issues SET " _
& "location = @location " _
& "WHERE id = " & ID
Dim locationParameter As ADODB.Parameter
Set locationParameter = Cm.CreateParameter("@location", adVarChar, adParamInput, 255)
Cm.Parameters.Append locationParameter
locationParameter.Value = locValue
SqlConnection(Cm)
End Sub
(我知道ID尚未参数化,问题出在位置)
Public Function SqlConnection(Cm As ADODB.Command) As ADODB.Recordset
Dim Cn As ADODB.Connection
Dim Server_Name As String
Dim Database_Name As String
Dim User_ID As String
Dim Password As String
Dim SQLStr As String
Server_Name = "127.0.0.1" ' Enter your server name here
Database_Name = "issues_and_outages" ' Enter your database name here
User_ID = "root" ' enter your user ID here
Password = "password" ' Enter your password here
Set Cn = New ADODB.Connection
Cn.Open "Driver={MySQL ODBC 8.0 ANSI Driver};Server=" & Server_Name & ";Database=" & Database_Name & _
";Uid=" & User_ID & ";Pwd=" & Password & ";"
Cm.CommandType = adCmdText
Cm.ActiveConnection = Cn
Set SqlConnection = Cm.Execute
End Function
该服务器是具有issue_and_outages表的MySQL,其列包含:
id(整数,无符号,密钥,自动递增)
位置(varchar(255),可为空)
更新单元格时,应该更新位置列,错误为
“运行时错误'-2147217887(80040e21)”: [MySQL] [ODBC 8.0(a)驱动程序] [mysqld-8.0.16]无效的参数类型“
给出,在Cm.Execute行上有错误。但是,数据库具有一列类型为varchar的大小为255的列,该列应为adVarChar,因此我不希望出现错误。
答案 0 :(得分:0)
正如对此SO answer进行的常规讨论和总结一样,大多数提供程序/驱动程序的ADO API不支持非存储过程SQL语句的命名参数。而是使用qmark位置参数样式。
Set Cm = New ADODB.Command
With Cm
.ActiveConnection = Cn
.CommandType = adCmdText
.CommandText = "UPDATE issues SET location = ? WHERE id = ?"
.Parameters.Append .CreateParameter("loc_param", adVarChar, adParamInput, 255, locValue)
.Parameters.Append .CreateParameter("id_param", adInteger, adParamInput,, ID)
.Execute
End With