VBS连接数据库操作

'转别人写的一份公共函数:) 

' DATABASE公用函数 

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Dim objConnection                          'CONNECTION对象实例 
Dim objRecordSet                                   'RECORDSET对象实例        
Dim objCommand                                '命令对象实例 
Dim strConnectionString                        '连接字符串 

' ******************************************************************** 
' 函数说明:连接数据库; 
' 参数说明:(1)strDBType(数据库类型:如ORACEL;DB2;SQL;ACCESS) 
'           (2)strDBAlias(数据库别名) 
'           (3)strUID(用户名) 
'           (4)strPWD(密码) 
'           (5)strIP(数据库IP地址:仅SQL SERVER 使用) 
'           (6)strLocalHostName(本地主机名:仅SQL SERVER 使用) 
'           (7)strDataSource(数据源:仅ACCESS使用;如d:\yysc.mdb) 
' 返回结果:无 
' 调用方法: ConnectDatabase(strDBType, strDBAlias, strUID, strPWD, strIP, strLocalHostName, strDataSource) 
' ******************************************************************** 
Sub ConnectDatabase(strDBType, strDBAlias, strUID, strPWD, strIP, strLocalHostName, strDataSource) 
    Set objConnection = CreateObject("ADODB.CONNECTION"                '1 - 建立CONNECTION对象的实例 
    
    Select Case UCase(Trim(strDBType)) 
        Case "ORACLE" 
            strConnectionString = "Driver={Microsoft ODBC for Oracle};Server=" & strDBAlias & ";Uid="_ 
                & strUID & ";Pwd=" & strPWD & ";"                                '2 - 建立连接字符串 
            objConnection.Open strConnectionString                                '3 - 用Open 方法建立与数据库连接 
        Case "DB2" 
            strConnectionString = "Driver={IBM DB2 ODBC DRIVER};DBALIAS=" & strDBAlias & ";Uid="_ 
                & strUID & ";Pwd=" & strPWD & ";"                                
            objConnection.Open strConnectionString                                
        Case "SQL" 
             strConnectionString = "DRIVER=SQL Server; SERVER=" & strIP & "; UID=" & strUID & "; PWD="_ 
                 & strPWD & "; APP=Microsoft Office 2003;WSID=" & strLocalHostName & "; DATABASE=" & strDBAlias & ";" 
            objConnection.Open strConnectionString                                            
        Case "ACCESS" 
            strConnectionString = "provider=microsoft.jet.oledb.4.0;data source=" & strDataSource &_ 
                ";Jet OLEDBatabase Password=" & strPWD & ";" 
            objConnection.Open strConnectionString                                                  
        Case Else 
            MsgBox "输入的数据库类型格式有误" & vbCrLf & "支持的数据库类型格式:ORACLE;DB2;SQL;ACCESS;EXCEL" 
    End Select 
    
    If (objConnection.State = 0) Then 
        MsgBox "连接数据库失败!" 
    End If 
    
End Sub 


' ******************************************************************** 
' 函数说明:查询数据库(查询单列); 
' 参数说明:  (1)strSql:SQL语句 
'           (2)strFieldName:字段名 
'           (3)str_Array_QueryResult:数组名(用来返回单列查询结果) 
' 返回结果:  intArrayLength:查询数据库返回的记录行数 
'           str_Array_QueryResult:数组名(用来返回单列查询结果) 
' 调用方法: intArrayLength = QueryDatabase(strSql, strFieldName, str_Array_QueryResult) 
' ******************************************************************** 
Function QueryDatabase(strSql, strFieldName, str_Array_QueryResult) 
    Dim intArrayLength                                                                                     '数组长度 
     Dim i 
    
    i = 0   
    str_Array_QueryResult = Array()                                '重新初始化数组为一个空数组 
    
    Set objRecordSet = CreateObject("ADODB.RECORDSET"                '4 - 建立RECORDSET对象实例 
    Set objCommand = CreateObject("ADODB.COMMAND"              '5 - 建立COMMAND对象实例 
    objCommand.ActiveConnection = objConnection 
    objCommand.CommandText = strSql 
        objRecordSet.CursorLocation = 3 
        objRecordSet.Open objCommand                            '6 - 执行SQL语句,将结果保存在RECORDSET对象实例中 
    
    intArrayLength = objRecordSet.RecordCount                  '将查询结果的行数作为数组的长度 
    
    If intArrayLength > 0 Then 
                ReDim str_Array_QueryResult(intArrayLength-1) 
                
                Do While NOT objRecordSet.EOF                                                '将数据库查询的列值赋值给数组             
                    str_Array_QueryResult(i) = objRecordSet(strFieldName) 
                        'Debug.WriteLine str_Array_QueryResult(i) 
                        objRecordSet.MoveNext 
                        i = i + 1 
                Loop 
'        Else 
                'ReDim str_Array_QueryResult(0)       
                'str_Array_QueryResult(0) = ""     
    End If 
    
    QueryDatabase = intArrayLength 
End Function 

' ******************************************************************** 
' 函数说明:更新数据库;包括INSERT、DELETE 和 UPDATE操作 
' 参数说明:(1)strSql:SQL语句 
' 返回结果:无 
' 调用方法: UpdateDatabase(strSql) 
' ******************************************************************** 
Sub UpdateDatabase(strSql) 
        Dim objCommand 
        Dim objField        
        
        Set objCommand = CreateObject("ADODB.COMMAND") 
        Set objRecordSet = CreateObject("ADODB.RECORDSET") 
        objCommand.CommandText = strSql 
        objCommand.ActiveConnection = objConnection 
        Set objRecordSet = objCommand.Execute 
        
'        Do Until objRecordSet.EOF 
        
'                For Each objField In objRecordSet.Fields 
'                        Debug.Write objField.Name & ": " & objField.Value & "   " 
'                Next 
                
'                objRecordSet.MoveNext 
'                Debug.WriteLine 
'        Loop        
        
        Set objCommand = Nothing 
        Set objRecordSet = Nothing 
                
End Sub 





' ******************************************************************** 
' 函数说明:返回符合查询结果的列的长度 
' 参数说明:(1)strSql:SQL语句 
' 返回结果:返回符合查询结果的列的长度 
' 调用方法: MaxLength = GetLenOfField(strSql) 
' ******************************************************************** 
Function GetLenOfField(strSql) 
    '如果SQL语句为空,则默认返回的列长度为0,结束函数;否则返回列的实际长度 
    If strSql = "" Then 
        GetLenOfField  = 0 
                Exit Function 
    Else 
            Set objRecordSet = CreateObject("ADODB.RECORDSET")                        '4 - 建立RECORDSET对象实例 
            Set objCommand = CreateObject("ADODB.COMMAND")              '5 - 建立COMMAND对象实例 
            objCommand.ActiveConnection = objConnection 
            objCommand.CommandText = strSql 
                objRecordSet.CursorLocation = 3 
                objRecordSet.Open objCommand                                '6 - 执行SQL语句,将结果保存在RECORDSET对象实例中 
            
            GetLenOfField = objRecordSet.RecordCount                              '返回符合查询结果的列的长度 
        
                Set objCommand = Nothing        
                Set objRecordSet = Nothing 
        End If 
End Function 


' ******************************************************************** 
' 函数说明:关闭数据库连接; 
' 参数说明:无 
' 返回结果:无 
' 调用方法: CloseDatabase() 
' ******************************************************************** 
Sub CloseDatabase() 
    objRecordSet.Close 
    objConnection.Close 
    
    Set objCommand = Nothing 
    Set objRecordSet = Nothing 
    Set objConnection = Nothing 
End Sub 
posted @ 2011-05-23 13:43  净沙  阅读(16571)  评论(0编辑  收藏  举报