Option Explicit
'==================================== 声明属性 =================================
Private Con As ADODB.Connection' ====================================声明事件===================================
'==================================== 初始化 类 ===================================Private Sub Class_Initialize() Set Con = New ADODB.Connection Con.CursorLocation = adUseClient '设置此项才可获取 recordset.RecordCount Con.ConnectionString = "Driver={MySQL ODBC 5.2 ANSI Driver};" + _ "Server=sc;" + _ "DB=oa;" + _ "UID=UID;" + _ "PWD=PWD;" + _ "OPTION=3;" + _ "Stmt=Set Names 'UTF-8';"End Sub'=================================== 以“属性”的形式对 私有变量 读取、赋值 ====================================
'=================================== 公有方法 ====================================
'关闭连接Public Sub closeConnection() Con.Close Set Con = NothingEnd Sub'检测是否连接成功
Public Sub checkConnection() Con.Open If Con.State = adStateOpen Then MsgBox "链接状态:" & Con.State & vbCrLf & "ADO版本:" & Con.Version, vbInformation, "" End If closeConnection '关闭连接End Sub'将查询得到的记录显示到指定 单元格
Public Sub recordToCell(sqlStr As String, wBook, wSheet, firstCell As String) Dim thisRec As ADODB.Recordset '查询记录 Set thisRec = selectRecord(sqlStr) '写入到指定 单元格 Workbooks(wBook).Sheets(wSheet).Range(firstCell).CopyFromRecordset thisRec closeConnection '关闭连接End Sub '============= 数据库 “插、查、改、删” =============='“删除”用“更改”[标记删除]实现)'①“插入”一条记录(返回值:1成功,-1已有相同值,0失败)
'db 数据库名'fieldArray 字段名 数组'valueArray 字段值 数组'checkField 用于检查是否已有相同记录的 字段名(field1,field2,……)Public Function inertRecord(db As String, fieldArray, valueArray, checkField As String) As Integer '检查是否已有相应记录 Dim insertRow As Integer Dim rec As ADODB.Recordset Dim checkFV, fieldValue, insertSql As String ' MsgBox TypeName(fieldArray) checkFV = Join(fieldAndValue(fieldArray, valueArray, checkField), " AND ") fieldValue = Join(fieldAndValue(fieldArray, valueArray), ",") Set rec = selectRecord(db, "id", checkFV) If rec.RecordCount < 1 Then insertSql = "INSERT INTO `" & db & "` SET " & fieldValue Con.Execute insertSql, insertRow, adCmdText inertRecord = IIf(insertRow = 1, 1, 0) Else inertRecord = -1 End If Set rec = NothingEnd Function'②按条件“查询”记录(返回值:ADODB.Recordset对象)
'db 数据库名'fields 要查询的字段名(field1,field2,……)'where 查询条件(`field1`='value1' AND|OR `field2`='value2' AND|OR ……)'sortFields 排序工序(field1,field2[DESC],……)'limit 要查询的记录数(100 或 20,100)Public Function selectRecord(db As String, Optional fields = "*", _ Optional where = "", Optional sortFields = "", Optional limit = "") As ADODB.Recordset Dim sqlStr As String sqlStr = "SELECT " & fields & " FROM `" & db & "`" If where <> "" Then sqlStr = sqlStr & " WHERE " & where If sortFields <> "" Then sqlStr = sqlStr & " ORDER BY '" & sortFields & "'" If limit <> "" Then sqlStr = sqlStr & " LIMIT " & limit ' MsgBox sqlStr Set selectRecord = allSql(sqlStr) '总查询 (执行sql语句方法)End Function'③“更改”符合指定条件的记录的指定字段(返回受影响的行数)
'db 数据库名'fieldArray 字段名 数组'valueArray 字段值 数组'where 条件(`field1`='value1' AND|OR `field2`='value2' AND|OR ……)Public Function updateRecord(db As String, fieldArray, valueArray, where As String) As Integer Dim updateRows As Integer Dim updateSql, fieldValue As String fieldValue = Join(fieldAndValue(fieldArray, valueArray), ",") If fieldValue <> "" Then updateSql = "UPDATE `" & db & "` SET " & fieldValue & " WHERE " & where Con.Open Con.Execute updateSql, updateRows, adCmdText updateRecord = IIf(updateRows <> 0, updateRows, 0) End IfEnd Function'总查询 (执行sql语句方法)Public Function allSql(sqlStr) As ADODB.Recordset Dim iRowscount As Long
Con.Open
Set allSql = Con.Execute(sqlStr, iRowscount, adCmdText)End Function'=================================== 私有方法 ====================================
'将 fieldArray、valueArray 连接成 `field`='value'(Array)并返回 “数组”'(若 onlyField 不为空,则只连接包含其内元素的 field)Private Function fieldAndValue(fieldArray, valueArray, Optional onlyField = "") Dim i, s As Integer Dim fj_onlyField(), fvArray() ' MsgBox fieldArray(0) For i = 0 To UBound(fieldArray) If fieldArray(i) <> "" Then If onlyField = "" Then ReDim Preserve fvArray(i) fvArray(i) = "`" & fieldArray(i) & "`='" & valueArray(i) & "'" Else If InStr(onlyField, ",") > 0 Then fj_onlyField = Split(onlyField, ",") If checkArrayValue(fj_onlyField, fieldArray(i)) = True Then ReDim Preserve fvArray(s) fvArray(s) = "`" & fieldArray(i) & "`='" & valueArray(i) & "'" s = s + 1 End If Else If onlyField = fieldArray(i) Then ReDim Preserve fvArray(0) fvArray(0) = "`" & fieldArray(i) & "`='" & valueArray(i) & "'" Exit For End If End If End If End If Next i fieldAndValue = fvArray End Function'检测数组中是否包含有=指定值的元素
Private Function checkArrayValue(arr, theValue) As Boolean Dim i As Integer checkArrayValue = False For i = 0 To UBound(arr) If arr(i) = theValue Then checkArrayValue = True Exit For End If Next iEnd Function'将 html实体 转换成正常字符(可用)
Private Function htmlDecodes(str As String) As String If str = "" Then htmlDecodes = "" Else str = Replace(str, "<", "<") str = Replace(str, ">", ">") str = Replace(str, "&", "&") str = Replace(str, """, Chr(34)) str = Replace(str, ">", Chr(39)) htmlDecodes = str End IfEnd Function