VB6.0 调用存储过程的例子(方法一)

王朝vb·作者佚名  2006-01-09
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VB6.0 调用存储过程的例子(方法一)

(说明:以下代码摘自微软的MSDN,经过测试没问题。使用该方法的前提条件是必须知道将要使用的参数化命令的详细情况。)

打开Form1窗体,Copy以下的代码到窗体中,该段代码将测试存储过程ADOTestRPE的返回值、输入参数及输出参数,测试的过程中,可能需要修改链接字符串。

Sub CreateParms()

Dim ADOCmd As New ADODB.Command

Dim ADOPrm As New ADODB.Parameter

Dim ADOCon As ADODB.Connection

Dim ADORs As ADODB.Recordset

Dim sParmName As String

Dim strConnect As String

Dim rStr As String

On Error GoTo ErrHandler

strConnect = "driver={SQL Server};server=(local);uid=sa;pwd=;database=pubs"

Set ADOCon = New ADODB.Connection

With ADOCon

.Provider = "MSDASQL"

.CursorLocation = adUseServer 'Must use Server side cursor.

.ConnectionString = strConnect

.Open

End With

Set ADOCmd.ActiveConnection = ADOCon

With ADOCmd

.CommandType = adCmdStoredProc

.CommandText = "ADOTestRPE"

End With

'Parameter 0 is the stored procedure Return code.

sParmName = "Return"

Set ADOPrm = ADOCmd.CreateParameter(sParmName, adInteger, _

adParamReturnValue, , 0)

ADOCmd.Parameters.Append ADOPrm

ADOCmd.Parameters(sParmName).Value = -1

'Parameter 1 is the setting for the stored procedure Output

' parameter.

sParmName = "Output"

Set ADOPrm = ADOCmd.CreateParameter(sParmName, adInteger, _

adParamOutput)

ADOCmd.Parameters.Append ADOPrm

ADOCmd.Parameters(sParmName).Value = 999

'Parameter 2

sParmName = "R1Num" 'Number of rows to return in Resultset 1.

Set ADOPrm = ADOCmd.CreateParameter(sParmName, adInteger, _

adParamInput)

ADOCmd.Parameters.Append ADOPrm

ADOCmd.Parameters(sParmName).Value = 1

'Parameter 3

sParmName = "P1Num" 'Number of PRINT statements in Resultset 1.

Set ADOPrm = ADOCmd.CreateParameter(sParmName, adInteger, _

adParamInput)

ADOCmd.Parameters.Append ADOPrm

ADOCmd.Parameters(sParmName).Value = 0

'Parameter 4

sParmName = "E1Num" 'Number of RAISERROR statements in Resultset

'1.

Set ADOPrm = ADOCmd.CreateParameter(sParmName, adInteger, _

adParamInput)

ADOCmd.Parameters.Append ADOPrm

ADOCmd.Parameters(sParmName).Value = 0

'Parameter 5

sParmName = "R2Num" 'Number of rows to return in Resultset 2.

Set ADOPrm = ADOCmd.CreateParameter(sParmName, adInteger, _

adParamInput)

ADOCmd.Parameters.Append ADOPrm

ADOCmd.Parameters(sParmName).Value = 2

'Parameter 6

sParmName = "P2Num" 'Number of PRINT statements in Resultset 2.

Set ADOPrm = ADOCmd.CreateParameter(sParmName, adInteger, _

adParamInput)

ADOCmd.Parameters.Append ADOPrm

ADOCmd.Parameters(sParmName).Value = 0

'Parameter 7

sParmName = "E2Num" 'Number of RAISERROR statements in Resultset

' 2.

Set ADOPrm = ADOCmd.CreateParameter(sParmName, adInteger, _

adParamInput)

ADOCmd.Parameters.Append ADOPrm

ADOCmd.Parameters(sParmName).Value = 0

Set ADORs = ADOCmd.Execute

Do While (Not ADORs Is Nothing)

If ADORs.State = adStateClosed Then Exit Do

While Not ADORs.EOF

For i = 0 To ADORs.Fields.Count - 1

rStr = rStr & " : " & ADORs(i)

Next i

Debug.Print Mid(rStr, 3, Len(rStr))

ADORs.MoveNext

rStr = ""

Wend

Debug.Print "----------------------"

Set ADORs = ADORs.NextRecordset

Loop

Debug.Print "Return: " & ADOCmd.Parameters("Return").Value

Debug.Print "Output: " & ADOCmd.Parameters("Output").Value

GoTo Shutdown

ErrHandler:

Call ErrHandler(ADOCon)

Resume Next

Shutdown:

Set ADOCmd = Nothing

Set ADOPrm = Nothing

Set ADORs = Nothing

Set ADOCon = Nothing

End Sub

Private Sub Command1_Click()

Call CreateParms

End Sub

Sub ErrHandler(objCon As Object)

Dim ADOErr As ADODB.Error

Dim strError As String

For Each ADOErr In objCon.Errors

strError = "Error #" & ADOErr.Number & vbCrLf & ADOErr.Description _

& vbCr & _

" (Source: " & ADOErr.Source & ")" & vbCr & _

" (SQL State: " & ADOErr.SQLState & ")" & vbCr & _

" (NativeError: " & ADOErr.NativeError & ")" & vbCr

If ADOErr.HelpFile = "" Then

strError = strError & " No Help file available" & vbCr & vbCr

Else

strError = strError & " (HelpFile: " & ADOErr.HelpFile & ")" _

& vbCr & " (HelpContext: " & ADOErr.HelpContext & ")" & _

vbCr & vbCr

End If

Debug.Print strError

Next

objCon.Errors.Clear

End Sub

 
 
 
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