从ADO中得到多个记录集以及怎么样在ADO中使用sql server 的存储过程
| DataType |
Value |
Length |
Data Length |
| BIGINT |
996857543543543 |
15 |
8 |
| INT |
543543 |
6 |
4 |
| SMALLINT |
32765 |
5 |
2 |
| TINYINT |
254 |
3 |
1 |
| BIT |
True |
1 |
1 |
| DECIMAL |
765.5432321 |
11 |
9 |
| NUMERIC |
432.6544 |
8 |
5 |
| MONEY |
543.1234 |
6 |
8 |
| SMALLMONEY |
543.1234 |
6 |
4 |
| FLOAT |
5.4E+54 |
8 |
8 |
| REAL |
2.43E+24 |
9 |
4 |
| DATETIME |
8/31/2003 11:55:25 PM |
19 |
8 |
| SMALLDATETIME |
8/31/2003 11:55:00 PM |
19 |
4 |
| CHAR |
QWE |
3 |
4 |
| VARCHAR |
Variable! |
9 |
9 |
| TEXT |
|
|
307 |
| NCHAR |
WIDE |
4 |
8 |
| NVARCHAR |
|
0 |
0 |
| NTEXT |
|
|
614 |
| GUID |
{58F94A80-B839-4B35-B73C-7F4B4D336C3C} |
36 |
16 | Return Value: 0 CREATE PROCEDURE "dbo"."DataTypeTester"
@myBigInt bigint
, @myInt int
, @mySmallint smallint
, @myTinyint tinyint
, @myBit bit
, @myDecimal decimal(10, 7)
, @myNumeric numeric(7, 4)
, @myMoney money
, @mySmallMoney smallmoney
, @myFloat float
, @myReal real
, @myDatetime datetime
, @mySmallDatetime smalldatetime
, @myChar char(4)
, @myVarchar varchar(10)
, @myText text
, @myNChar nchar(4)
, @myNVarchar nvarchar(10)
, @myNText ntext
, @myGuid uniqueidentifier
AS
SELECT 'BIGINT' "DataType", @myBigInt "Value" , LEN(@myBigInt) "Length" , DATALENGTH(@myBigInt) "Data Length"
SELECT 'INT' , @myInt , LEN(@myInt) , DATALENGTH(@myInt)
SELECT 'SMALLINT' , @mySmallint , LEN(@mySmallint) , DATALENGTH(@mySmallint)
SELECT 'TINYINT' , @myTinyint , LEN(@myTinyint) , DATALENGTH(@myTinyint)
SELECT 'BIT' , @myBit , LEN(@myBit) , DATALENGTH(@myBit)
SELECT 'DECIMAL' , @myDecimal , LEN(@myDecimal) , DATALENGTH(@myDecimal)
SELECT 'NUMERIC' , @myNumeric , LEN(@myNumeric) , DATALENGTH(@myNumeric)
SELECT 'MONEY' , @myMoney , LEN(CAST(@mySmallMoney as varchar)) , DATALENGTH(@myMoney)
SELECT 'SMALLMONEY' , @mySmallMoney , LEN(CAST(@mySmallMoney as varchar)) , DATALENGTH(@mySmallMoney)
SELECT 'FLOAT' , @myFloat , LEN(@myFloat) , DATALENGTH(@myFloat)
SELECT 'REAL' , @myReal , LEN(@myReal) , DATALENGTH(@myReal)
SELECT 'DATETIME' , @myDatetime , LEN(@myDatetime) , DATALENGTH(@myDatetime)
SELECT 'SMALLDATETIME' , @mySmallDatetime , LEN(@mySmallDatetime) , DATALENGTH(@mySmallDatetime)
SELECT 'CHAR' , @myChar , LEN(@myChar) , DATALENGTH(@myChar)
SELECT 'VARCHAR' , @myVarchar , LEN(@myVarchar) , DATALENGTH(@myVarchar)
SELECT 'TEXT' , '' , '' , DATALENGTH(@myText)
SELECT 'NCHAR' , @myNChar , LEN(@myNChar) , DATALENGTH(@myNChar)
SELECT 'NVARCHAR' , @myNVarchar , LEN(@myNVarchar) , DATALENGTH(@myNVarchar)
SELECT 'NTEXT' , '' , '' , DATALENGTH(@myNText)
SELECT 'GUID' , @myGuid , LEN(@myGuid) , DATALENGTH(@myGuid)
-- TODO: READTEXT should do this...
/*
, @myText "text"
, @myNText "ntext"
*/
RETURN(0)
Code:<![CDATA[<!--#include virtual="/testsite/global_include.asp" -->
<%
Dim conn 'As ADODB.Connection
Dim cmd 'As ADODB.Command
Dim prm 'As ADODB.Parameter
Dim rs 'As ADODB.Recordset
Dim ret 'As Long
Dim proc 'As String
Dim allData() 'As Variant
Dim colNames() 'As Variant
Dim i 'As Long
Dim datetime 'As DateTime
Const StoredProcedure = "[dbo].[DataTypeTester]"
Const titleString = "<html><head><title>ADO Parameter Test 3 / Multiple Recordset Tester</title><link rel=""stylesheet"" href=""/Templates/style.css"" type=""text/css"" /></head><body><div align=""left""><h3>A example of how to retrieve multiple recordsets from ADO and how to set parameters in ADO for SQL Server Stored Procedures</h3>"
ReDim allData(0) ' initialize array dimension
datetime = Now()
Response.Write titleString
Set conn = Server.CreateObject("ADODB.Connection")
Set cmd = Server.CreateObject("ADODB.Command")
conn.Open Application("connectionString")
With cmd
Set .ActiveConnection = conn
.CommandText = StoredProcedure
' always use ADO constants
.CommandType = adCmdStoredProc
' Check into the NamedParameters property at some point
' It doesn't require the order to be enforced, but it is always a good idea to enforce it anyway (for the documentation aspect of coding)
' RETURN parameter needs to be first
.Parameters.Append cmd.CreateParameter("RETURN", adInteger, adParamReturnValue, 4)
.Parameters.Append .CreateParameter("@myBigInt", adBigInt, adParamInput, 8, 996857543543543)
.Parameters.Append .CreateParameter("@myInt", adInteger, adParamInput, 4, 543543)
.Parameters.Append .CreateParameter("@mySmallint", adSmallInt, adParamInput, 2, 32765)
.Parameters.Append .CreateParameter("@myTinyint", adTinyInt, adParamInput, 1, 254)
.Parameters.Append .CreateParameter("@myBit", adBoolean, adParamInput, 4, True)
' Only Decimal and Numeric needs Precision and NumericScale
.Parameters.Append .CreateParameter("@myDecimal", adDecimal, adParamInput, 9, 765.5432321)
With .Parameters.Item("@myDecimal")
.Precision = 10
.NumericScale = 7
End With
Set prm = .CreateParameter("@myNumeric", adNumeric, adParamInput, 5, 432.6544)
prm.Precision = 7
prm.NumericScale = 4
.Parameters.Append prm
Set prm = Nothing
.Parameters.Append .CreateParameter("@myMoney", adCurrency, adParamInput, 8, 543.1234)
.Parameters.Append .CreateParameter("@mySmallMoney", adCurrency, adParamInput, 4, 543.1234)
.Parameters.Append .CreateParameter("@myFloat", adDouble, adParamInput, 8, 5.4E+54)
.Parameters.Append .CreateParameter("@myReal", adSingle, adParamInput, 4, 2.43E+24)
.Parameters.Append .CreateParameter("@myDatetime", adDBTimeStamp, adParamInput, 8, datetime)
.Parameters.Append .CreateParameter("@mySmallDatetime", adDBTimeStamp, adParamInput, 4, datetime)
.Parameters.Append .CreateParameter("@myChar", adChar, adParamInput, 4, "QWE")
.Parameters.Append .CreateParameter("@myVarchar", adVarchar, adParamInput, 10, "Variable!")
.Parameters.Append .CreateParameter("@myText", adLongVarChar, adParamInput, Len(titleString))
.Parameters.Item("@myText").AppendChunk titleString
.Parameters.Append .CreateParameter("@myNChar", adWChar, adParamInput, 4, "WIDE")
.Parameters.Append .CreateParameter("@myNVarchar", adVarWchar, adParamInput, 10, "")
.Parameters.Append .CreateParameter("@myNText", adLongVarWChar, adParamInput, Len(titleString))
.Parameters.Item("@myNText").AppendChunk titleString
' note the difference in these - without the {} the string implicitly converts
' the adVarChar version is of course commented out
'.Parameters.Append .CreateParameter("@myGuid", adVarChar, adParamInput, 36, "58F94A80-B839-4B35-B73C-7F4B4D336C3C")
.Parameters.Append .CreateParameter("@myGuid", adGUID, adParamInput, 16, "{58F94A80-B839-4B35-B73C-7F4B4D336C3C}")
Set rs = .Execute
'get column names
ReDim colNames(rs.Fields.Count - 1)
For i = 0 to rs.Fields.Count - 1
colNames(i) = rs.Fields.Item(i).Name
Next
Do While Not (rs Is Nothing)
' get initial recordset
If Not rs.EOF Then
' for retrieving more than about 30 or so recordsets you would probably want to use a collection
allData(UBound(allData)) = rs.GetRows(adGetRowsRest)
End If
' this will be nothing if no recordset is returned
Set rs = rs.NextRecordset
' resize array if needed
If Not (rs Is Nothing) Then ReDim Preserve allData(UBound(allData) + 1)
Loop
' must release the recordset before retrieving output parameters and/or the return value
ReleaseObj rs, True, True
ret = CStr(.Parameters.Item("RETURN").Value)
End With
ReleaseObj cmd, False, True
ReleaseObj conn, True, True
' show stored procedure
proc = GetStoredProcedureDefinition(StoredProcedure)
With Response
outputNamedGetRowsArray allData, colNames
.Write "<br />"
.Write "Return Value: " & ret & "<br /><br />"
.Write "<pre>" & proc & "</pre>"
End With
displayAspFile Server.MapPath("adodb.command3.asp")
Response.Write "</div></body></html>"
%>]]> 
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