Execute, Requery, and Clear Methods Example (VBScript)

Άρθρο
11/18/2022

This example demonstrates the Execute method when run from both a Command object and a Connection object. It also uses the Requery method to retrieve current data in a recordset, and the Clear method to clear the contents of the Errors collection. The ExecuteCommand and PrintOutput procedures are required for this procedure to run.

Use the following example in an Active Server Page (ASP). To view this fully functional example, you must either have the data source AdvWorks.mdb (installed with the SDK samples) located at C:\Program Files\Microsoft Platform SDK\Samples\DataAccess\Rds\RDSTest\advworks.mdb or edit the path in the example code to reflect the actual location of this file. This is a Microsoft Access database file.

Use Find to locate the file Adovbs.inc and place it in the directory you plan to use. Cut and paste the following code into Notepad or another text editor, and save it as ExecuteVBS.asp. You can view the result in any client browser.

<!-- BeginExecuteVBS -->  
<%@ Language=VBScript %>  
<% ' use this meta tag instead of ADOVBS.inc%>  
<!-- METADATA TYPE="typelib" uuid="00000205-0000-0010-8000-00AA006D2EA4"  -->  
<HTML>  
<HEAD>  
<META name="VI60_DefaultClientScript"  content=VBScript>  
<META NAME="GENERATOR" Content="Microsoft Visual Studio 6.0">  
<title>ADO Execute Method</title>  
<STYLE>  
<!--  
BODY {  
   font-family: 'Verdana','Arial','Helvetica',sans-serif;  
   BACKGROUND-COLOR:white;  
   COLOR:black;  
    }  
.thead {  
   background-color: #008080;   
   font-family: 'Verdana','Arial','Helvetica',sans-serif;   
   font-size: x-small;  
   color: white;  
   }  
.thead2 {  
   background-color: #800000;   
   font-family: 'Verdana','Arial','Helvetica',sans-serif;   
   font-size: x-small;  
   color: white;  
   }  
.tbody {   
   text-align: center;  
   background-color: #f7efde;  
   font-family: 'Verdana','Arial','Helvetica',sans-serif;   
   font-size: x-small;  
    }  
-->  
</STYLE>  
</HEAD>  
  
<BODY>  
<H3>ADO Execute Method</H3>  
<HR>  
<H4>Recordset Retrieved Using Connection Object</H4>  
<!--- Recordsets retrieved using Execute method of Connection and Command Objects-->  
<%   
     ' connection, command and recordset variables  
    Dim Cnxn, strCnxn  
    Dim rsCustomers, strSQLCustomers  
    Dim Cmd   
    Dim rsProducts, strSQLProducts  
  
    ' create and open connection  
    Set Cnxn = Server.CreateObject("ADODB.Connection")   
    strCnxn="Provider='sqloledb';Data Source=" & _  
            Request.ServerVariables("SERVER_NAME") & ";" & _  
            "Integrated Security='SSPI';Initial Catalog='Northwind';"  
    Cnxn.Open  strCnxn  
    ' create and open recordset  
    Set rsCustomers = Server.CreateObject("ADODB.Recordset")  
    strSQLCustomers = "Customers"  
    rsCustomers.Open strSQLCustomers, Cnxn, adOpenKeyset, adLockOptimistic, adCmdTable  
  
    '1st Recordset using Connection - Execute  
    Set rsCustomers = Cnxn.Execute(strSQLCustomers)   
  
    Set Cmd = Server.CreateObject("ADODB.Command")  
    Cmd.ActiveConnection = Cnxn  
    strSQLProducts = "SELECT * From Products"  
    Cmd.CommandText = strSQLProducts  
  
    '2nd Recordset Cmd - execute   
    Set rsProducts = Cmd.Execute  
    %>  
    <TABLE COLSPAN=8 CELLPADDING=5 BORDER=0 ALIGN=CENTER>  
    <!-- BEGIN column header row for Customer Table-->  
    <TR CLASS=thead>  
      <TH>Company Name</TH>  
      <TH>Contact Name</TH>  
      <TH>City</TH>  
    </TR>  
  
    <!--Display ADO Data from Customer Table-->  
    <%   
    Do While Not rsCustomers.EOF %>  
      <TR CLASS=tbody>  
        <TD>   
        <%= rsCustomers("CompanyName")%>   
        </TD>  
        <TD>  
        <%= rsCustomers("ContactName") %>   
        </TD>  
        <TD>   
        <%= rsCustomers("City")%>   
        </TD>  
      </TR>   
      <%   
    rsCustomers.MoveNext   
    Loop   
    %>  
</TABLE>  
  
<HR>  
<H4>Recordset Retrieved Using Command Object</H4>  
  
<TABLE CELLPADDING=5 BORDER=0 ALIGN=CENTER WIDTH="80%">  
  
<!-- BEGIN column header row for Product List Table-->  
<TR CLASS=thead2>  
  <TH>Product Name</TH>  
  <TH>Unit Price</TH>  
</TR>  
  
<!-- Display ADO Data Product List-->  
<% Do Until rsProducts.EOF %>  
  <TR CLASS=tbody>  
    <TD>  
    <%= rsProducts("ProductName")%>    
    </TD>  
    <TD>   
    <%= rsProducts("UnitPrice")%>   
    </TD>  
<%   
    rsProducts.MoveNext   
    Loop  
  
    ' clean up  
    If rsCustomers.State = adStateOpen then  
        rsCustomers.Close  
    End If  
    If rsProducts.State = adStateOpen then  
        rsProducts.Close  
    End If  
    If Cnxn.State = adStateOpen then  
        Cnxn.Close  
    End If  
    Set Cmd = Nothing  
    Set rsCustomers = Nothing  
    Set rsProducts = Nothing  
    Set Cnxn = Nothing  
%>  
</TABLE>  
  
</BODY>  
</HTML>  
<!-- EndExecuteVBS -->

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Execute, Requery, and Clear Methods Example (VBScript)

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