各位前辈，我在用ado方式和sql数据库联接的时候总是出现第一行：“=”附近有复发错误，请帮忙看一下谢谢啦。
下面这是我做的登陆模块，因为总是出现“=”附近有语法错误，一直没办法和数据库连上，请各位前辈高手帮忙解答，谢谢。
Private Sub cmdok_Click()
On Error GoTo errhandler
Dim gconn As New ADODB.Connection
gconn.Open "Provider=MSDASQL.1;Persist Security Info=False;User ID=sa;Data Source=zlt;Initial Catalog=ec "
Dim user As String, pwd As String
user = txtuser
pwd = txtpwd
gnusertype = cbousertype.ListIndex
gsusername = user
Dim strsql As String
strsql = "select * from userlist where 用户名= " '&user& " 'and 用户密码 " '&pwd& " 'and 用户类型= "&gnusertype
Dim a As New ADODB.Recordset
a.Open strsql, gconn, adOpenStatic
Static ntrycount As Integer
If r.EOF Then
MsgBox "次用户不存在或密码错误清重新输入！ ", vbCritical, "输入错误 "
txtuser.SetFocus
txtuser.SelStart = 0
txtuser.SelLength = Len(txtuser)
ntrycount = ntrycount + 1
If ntrycount > = 3 Then
MsgBox "输入错误次数过多无权访问本系统！ ", vbCritical, "错误 "
Unload Me
gconn.Close
End If
Else
Unload Me
frmmain.Show
End If
a.Close
Exit Sub
errhandler:
MsgBox Err.Description, vbCritical, "错误！ "
End Sub
[解决办法]
strsql = "select * from userlist where 用户名= ' " & user & " 'and 用户密码= ' "& pwd & " ' and 用户类型= "& gnusertype & " "
[解决办法]
strsql = "select * from userlist where 用户名= " '&user& " 'and 用户密码 " '&pwd& " 'and 用户类型= "&gnusertype 錯了
strsql = "select * from userlist where 用户名= " '& user & " 'and 用户密码= " '& pwd & " 'and 用户类型= "& gnusertype
[解决办法]
数据库中没有userlist这个表
