vb6如何讀oracle,vb怎么念

vb6.0 連接oracle 數(shù)據(jù)庫(kù)

'Ctrl+t找Microsoft DataGrid Control....

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'菜單"工程"-"引用" 找 Microsoft ActiveX Data Object....

Dim cn As New ADODB.Connection

Dim rst As New ADODB.Recordset

Dim SqlStr As String

cn.Open "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=MyOracleDB;User Id=myUsername;Password=myPassword;Integrated Security=no;"

SqlStr = "Select * From 某個(gè)表"

rst.CursorLocation = adUseClient

rst.Open SqlStr, cn, adOpenDynamic, adLockOptimistic, adCmdText '打開(kāi)記錄集

Set DataGrid1.DataSource = rst '給DataGrid修改數(shù)據(jù)源

在VB6.0中如何連接Oracle數(shù)據(jù)庫(kù)表，請(qǐng)教大牛們了

老問(wèn)題了，隨便上網(wǎng)就找得到，

以下供參考,轉(zhuǎn)自ccid。

首先要安裝ORACLE客戶端或服務(wù)器端,建好DB以及SERVICE,連接成功后就可以開(kāi)始了,以下是VB訪問(wèn)ORACLE的代碼:

Option Explicit

'以下是一些變量以及參數(shù)的定義

'DB的名稱

Public Const strdbname = "DBNAME"

'用戶名

Public Const strusr = "BLUESKY35"

'密碼

Public Const strpwd = "PASSWORD"

'OraSession

Public OraSession As Object

'OraDatabase

Public OraDB As OraDatabase

'OraDynaset

Public OraDyn As OraDynaset

'連接ORACLE的函數(shù)

'連接成功:true 連接失敗:false

Public Function f_connect() As Boolean

On Error GoTo ierr

f_connect = False

Set OraSession = CreateObject("OracleInProcServer.XOraSession")

Set OraDB = OraSession.OpenDatabase(strdbname, strusr "/" strpwd, 0)

f_connect = True

Exit Function

ierr:

MsgBox Err.Description, vbOKOnly + vbCritical, "Error"

f_connect = False

End Function

'通過(guò)傳入SQL語(yǔ)句從數(shù)據(jù)庫(kù)的表里取得記錄

Public Function f_select(strsql As String) As OraDynaset

On Error GoTo ierr

Set OraDyn = OraDB.CreateDynaset(strsql, ORADYN_READONLY)

Set f_select = OraDyn

Exit Function

ierr:

MsgBox Err.Description, vbOKOnly + vbCritical, "Error"

Set f_select = Nothing

End Function

'執(zhí)行更新語(yǔ)句,返回受本次更新影響的記錄數(shù)

Public Function f_execute(strsql As String) As Boolean

On Error GoTo ierr

f_execute = False

OraDB.BeginTrans

f_execute = OraDB.ExecuteSQL(strsql)

Exit Function

ierr:

MsgBox Err.Description, vbOKOnly + vbCritical, "Error"

OraDB.Rollback

End Function

'斷開(kāi)連接

'斷開(kāi)成功:true 斷開(kāi)失敗:false

Public Function f_disconnect() As Boolean

On Error GoTo ierr

f_disconnect = False

If Not OraDyn Is Nothing Then

OraDyn.Close

End If

Set OraSession = Nothing

OraDB.Close

Set OraDB = Nothing

f_disconnect = True

Exit Function

ierr:

MsgBox Err.Description, vbOKOnly + vbCritical, "Error"

f_disconnect = False

End Function

將以上代碼放入模塊,直接調(diào)用即可.

win8專業(yè)版64位安裝vb6.0連接oracle10g數(shù)據(jù)庫(kù)的問(wèn)題

這個(gè)問(wèn)題，很多人反應(yīng)過(guò)，應(yīng)該是win8不支持vb6.

如果你的電腦很好的話，你可以裝個(gè)虛擬機(jī)vmare軟件，里面裝xp和vb6（相當(dāng)于一臺(tái)已啟動(dòng)的電腦）。現(xiàn)在很多人用虛擬機(jī)軟件，很好用。

VB6 怎么連接 Oracle10g 64位？？

把vb安裝后的文件，從C:\Program Files(x86)拷貝到C:\Program Files，

執(zhí)行C:\Program Files里的vb，這樣調(diào)試的時(shí)候能連接oracle。

ps：vb安裝在C:\Program Files(x86)，編譯后的程序能執(zhí)行，只是調(diào)試受影響，安裝vb時(shí)只能在Program Files(x86)里，不能修改。

oracle的CLOB字段，怎么用VB6來(lái)讀寫

Option Explicit

Public rn As ADODB.Connection

Public Function CreateDataSource(DataSource As String, UserID As String, Password As String) As Boolean

On Error GoTo DbConErr:

Set rn = New ADODB.Connection

With rn

.ConnectionString = "Provider=OraOLEDB.Oracle.1; password=TEST ;User ID = TEST;Data Source=DEV;Locale Identifier=2052"

.Open

End With

CreateDataSource = True

Exit Function

DbConErr:

CreateDataSource = False

End Function

Sub BlobToFile(fld As ADODB.Field, filename As String, Optional ChunkSize As Long = 8192)

Dim fnum As Integer, bytesleft As Long, bytes As Long

Dim tmp() As Byte

If (fld.Attributes And adFldLong) = 0 Then

Err.Raise 1001, , "field doesn't support the GetChunk method."

End If

If Dir$(filename) "" Then Kill filename

fnum = FreeFile

Open filename For Binary As fnum

bytesleft = fld.ActualSize

Do While bytesleft

bytes = bytesleft

If bytes ChunkSize Then bytes = ChunkSize

tmp = fld.GetChunk(bytes)

Put #fnum, , tmp

bytesleft = bytesleft - bytes

Loop

Close #fnum

End Sub

Sub FileToBlob(fld As ADODB.Field, filename As String, Optional ChunkSize As Long = 8192)

Dim fnum As Integer, bytesleft As Long, bytes As Long

Dim tmp() As Byte

If (fld.Attributes And adFldLong) = 0 Then

Err.Raise 1001, , "field doesn't support the GetChunk method."

End If

If Dir$(filename) = "" Then Err.Raise 53, , "File not found"

fnum = FreeFile

Open filename For Binary As fnum

bytesleft = LOF(fnum)

Do While bytesleft

bytes = bytesleft

If bytes ChunkSize Then bytes = ChunkSize

ReDim tmp(1 To bytes) As Byte

Get fnum, , tmp

fld.AppendChunk tmp

bytesleft = bytesleft - bytes

Loop

Close #fnum

End Sub

Private Sub cmdread_Click()

Dim rs As New ADODB.Recordset

rs.ActiveConnection = rn

rs.LockType = adLockOptimistic

rs.CursorLocation = adUseClient

rs.Source = "select * from t_demo"

rs.Open

comDlgDir.DialogTitle = "保存文件"

comDlgDir.Filter = "*.*"

comDlgDir.ShowSave

Call BlobToFile(rs.Fields("text"), comDlgDir.filename)

Set rs = Nothing

Exit Sub

Set rs = Nothing

End Sub

Private Sub cmdsave_Click()

Dim rs As New ADODB.Recordset

rs.ActiveConnection = rn

rs.LockType = adLockOptimistic

rs.CursorLocation = adUseClient

rs.Source = "select * from t_demo"

rs.Open

rs.AddNew

comDlgDir.DialogTitle = "選取文件"

comDlgDir.ShowOpen

rs.Fields("id").Value = 1

If comDlgDir.filename "" Then

Call FileToBlob(rs.Fields("text"), comDlgDir.filename)

rs.Update

End If

Set rs = Nothing

Exit Sub

Set rs = Nothing

End Sub

Private Sub Form_Load()

If Not CreateDataSource("DEV", "TEST", "TEST") Then

MsgBox "Connection failure!"

End If

End Sub

請(qǐng)教vb如何連接oracle數(shù)據(jù)庫(kù)

VB6.0可通過(guò)Adodc數(shù)據(jù)訪問(wèn)控件的屬性頁(yè)進(jìn)行連接Oracle數(shù)據(jù)庫(kù)。

1）建立數(shù)據(jù)工程，在窗體添加Adodc數(shù)據(jù)訪問(wèn)控件。鼠標(biāo)選中Adodc控件-右鍵-Adodc屬性-使用連接字符串-生成。

2）選Microsoft OLE DB Provider For Oracle，下一步。

3）根據(jù)數(shù)據(jù)鏈接屬性對(duì)話框填寫所需內(nèi)容，測(cè)試連接。點(diǎn)確定，最終在Adodc屬性頁(yè)獲得連接字符串，復(fù)制該字符串，即可作為Adodc數(shù)據(jù)訪問(wèn)控件直接使用，或在代碼中用于Adodc控件或ADO數(shù)據(jù)訪問(wèn)對(duì)象。

名稱欄目：vb6如何讀oracle,vb怎么念
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