使用vb6 ODBC驱动程序从数据mysql计数表的行

Question

如何使用Visual Basic 6的ODBC DRIVER 3:51 MYSQL功能计算表中的行数？

Answer 1

Dim strDataBaseName As String
Dim strDBCursorType As String
Dim strDBLockType As String
Dim strDBOptions As String
Dim rs As ADODB.Recordset
Dim cn As ADODB.Connection

Private Sub Command1_Click()

Dim b as Long
strDBCursorType = adOpenDynamic  'CursorType
strDBLockType = adLockOptimistic   'LockType
strDBOptions = adCmdText         'Options

Set cn = New ADODB.Connection


cn.Open ConnectString()

    With cn
        .CommandTimeout = 0
        .CursorLocation = adUseClient
    End With

    Set rs = New ADODB.Recordset       'Creates record set

    strSQL = "select COUNT(id) from item"

    rs.Open strSQL, cn, strDBCursorType, strDBLockType, strDBOptions


if rs.Eof then
   Goto ExitSub    
else
   <Traverse your recordset here>
end if

ExitSub:

rs.Close
Set rs = Nothing
cn.Close
Set cn = Nothing

On Error GoTo 0
Exit Sub



Private Function ConnectString() As String
Dim strServerName as String
Dim strDatabaseName as string
Dim strUserName as string
Dim strPassword as string


strServerName = "localhost" 
strDatabaseName = "DatabaseName"
strUserName = "UserName"
strPassword ="Password"

ConnectString = "DRIVER={MySQL ODBC 3.51 Driver};" & _
                "SERVER=" & strServerName & _
                ";DATABASE=" & strDatabaseName & ";" & _
                "USER=" & strUserName & _
                ";PASSWORD=" & strPassword  & _
                ";OPTION=3;"

End Function

Try it.