Refresh 方法范例 (VBScript)
内容
Refresh 方法范例 (VBScript)
以下范例举例说明如何在运行时设置必要的 RDS.DataControl 参数。使用 Refresh 方法检索 Recordset 的方式取决于 ExecuteOptions 和 FetchOptions 属性的设置。如要测试该范例，请剪切该代码并粘贴至规范的 HTML 文本的 <Body></Body> 标记之间，并将其命名为“ADCapi2.asp”。ASP 脚本将标识服务器。
<HTML>
<HEAD>
<TITLE>Refresh / ExecuteOptions</TITLE>
</HEAD>
<BODY>
<Center><H2>RDS API Code Examples </H2>
<HR>
<Object CLASSID="clsid:AC05DC80-7DF1-11d0-839E-00A024A94B3A"
CODEBASE="http://<%=Request.ServerVariables("SERVER_NAME")%>/MSADC/Samples/Sheridan.cab"
ID=GRID1
datasrc=#ADC
HEIGHT=125
WIDTH=495>
<PARAM NAME="AllowAddNew" VALUE="TRUE">
<PARAM NAME="AllowDelete" VALUE="TRUE">
<PARAM NAME="AllowUpdate" VALUE="TRUE">
<PARAM NAME="Caption" VALUE="Remote Data Service Run Time">
</OBJECT>
<!-- 在设计时设置的不带参数的 RDS.DataControl -->
<OBJECT classid="clsid:BD96C556-65A3-11D0-983A-00C04FC29E33"
ID=ADC>
</OBJECT>
<HR>
<Input Size=70 Name="txtServer" Value="http://<%=Request.ServerVariables("SERVER_NAME")%>"><BR>
<Input Size=70 Name="txtConnect" Value = "dsn=ADCDemo;UID=ADCDemo;PWD=ADCDemo;"><BR>
<Input Size=70 Name="txtSQL" Value="Select * from Employee">
<BR>
Choose if you want the Recordset brought back Synchronously on the current calling thread or Asynchronously on another thread
<Input Type="Radio" Name="optExecuteOptions" Checked OnClick="SetExO('adcExecSync')">
<Input Type="Radio" Name="optExecuteOptions" OnClick="SetExO('adcExecAsync')"><BR>
Fetch Up Front, Background Fetch with Blocking or Background Fetch without Blocking
<Input Type="Radio" Name="optFetchOptions" OnClick="SetFO('adcFetchUpFront')">
<Input Type="Radio" Name="optFetchOptions" Checked OnClick="SetFO('adcFetchBackground')">
<Input Type="Radio" Name="optFetchOptions" OnClick="SetFO('adcFetchAsync')">
<HR>
<INPUT TYPE=BUTTON NAME="Run" VALUE="Run"><BR>
<H4>Fill Grid with these values or change them to see data from another ODBC data source on your server</H4>
</Center>
<Script Language="VBScript">
<!--
Dim EO 'ExecuteOptions
Dim FO 'FetchOptions
EO = "adcExecSync" ' 默认值
FO = "adcFetchBackground" ' 默认值
Sub SetExO(NewEO)
EO = NewEO
End Sub
Sub SetFO(NewFO)
FO = NewFO
End Sub
' 在运行时设置 RDS.DataControl 参数。
Sub Run_OnClick
ADC.Server = txtServer.Value
ADC.SQL = txtSQL.Value
ADC.Connect = txtConnect.Value
If EO = "adcExecSync" Then ' 选择 ExecuteOption
ADC.ExecuteOptions = adcExecSync
MsgBox "Recordset brought in on current calling thread Syncronously"
Else
ADC.ExecuteOptions = adcExecAsync
MsgBox "Recordset brought in on another thread Asyncronously"
End If
If FO = "adcFetchBackground" Then ' 选择 FetchOption
ADC.FetchOptions = adcFetchBackground
MsgBox "Control goes back to user after first batch of records returned"
ElseIf FO = " adcFetchUpFront" Then
ADC.FetchOptions = adcFetchUpFront
MsgBox "All records returned before control goes back to user"
Else
ADC.FetchOptions = adcFetchAsync
MsgBox "Control goes back to user immediately"
End If
ADC.Refresh
End Sub
-->
</Script>
</BODY>
</HTML>