📄 mdmthmovex.htm
字号:
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2 Final//EN">
<HTML dir=ltr>
<HEAD>
<META HTTP-EQUIV="Content-Type" Content="text/html; charset=gb2312"><title>Move 方法范例</title>
<style>@import url(msdn_ie4.css);</style>
</HEAD>
<BODY>
<h3><a name="mdmthmovex"></a>Move 方法范例</h3>
<p>
该范例使用 Move 方法定位基于用户输入的记录指针。</p>
<pre>Public Sub MoveX() Dim rstAuthors As ADODB.Recordset
Dim strCnn As String
Dim varBookmark As Variant
Dim strCommand As String
Dim lngMove As Long ' 打开 Authors 表的记录集。
strCnn = "Provider=sqloledb;" & _
"Data Source=srv;Initial Catalog=pubs;User Id=sa;Password=; "
Set rstAuthors = New ADODB.Recordset
rstAuthors.CursorType = adOpenStatic
' 使用客户端游标以允许使用 AbsolutePosition 属性。
rstAuthors.CursorLocation = adUseClient
rstAuthors.Open "SELECT au_id, au_fname, au_lname, city, state " & _
"FROM Authors ORDER BY au_lname", strCnn, , , adCmdText
rstAuthors.MoveFirst Do While True
' 显示有关当前记录的信息并询问要移动的记录数。 strCommand = InputBox( _
"Record " & rstAuthors.AbsolutePosition & _
" of " & rstAuthors.RecordCount & vbCr & _
"Author: " & rstAuthors!au_fname & _
" " & rstAuthors!au_lname & vbCr & _
"Location: " & rstAuthors!City & _
", " & rstAuthors!State & vbCr & vbCr & _
"Enter number of records to Move " & _
"(positive or negative).") If strCommand = "" Then Exit Do ' 保存书签以防 Move 向前或向后移动太远。
varBookmark = rstAuthors.Bookmark ' Move 方法需要数据类型为长整型的参数。
lngMove = CLng(strCommand)
rstAuthors.<i>Move</i> lngMove ' 捕获 BOF 或 EOF。
If rstAuthors.BOF Then
MsgBox "Too far backward! " & _
"Returning to current record."
rstAuthors.Bookmark = varBookmark
End If
If rstAuthors.EOF Then
MsgBox "Too far forward! " & _
"Returning to current record."
rstAuthors.Bookmark = varBookmark
End If
Loop
rstAuthors.CloseEnd Sub
</pre>
<p class=label>
<b>VBScript 版本</b></p>
<p>
下面是使用 VBScript 编写、并用于 Active Server Page (ASP) 的相同范例。如需查看该完整功能范例，请使用与 IIS 一同安装并位于 C:\InetPub\ASPSamp\AdvWorks 的数据源 AdvWorks.mdb，来创建名为 AdvWorks 的系统“数据源名称”(DSN)。这是 Microsoft Access 数据库文件。请使用查找命令定位文件 Adovbs.inc，并将其放入计划使用的目录中。请将以下代码剪切并粘贴到记事本或其他文本编辑器中，另存为“Move.asp”。这样，便可在任何客户端浏览器中查看结果。</p>
<p>
请输入字母或非整数查看错误处理的运作。</p>
<pre><!-- #Include file="ADOVBS.INC" -->
<% Language = VBScript %>
<HTML><HEAD>
<TITLE>ADO Move Methods</TITLE></HEAD>
<BODY>
<FONT FACE="MS SANS SERIF" SIZE=2>
<Center>
<H3>ADO Move Methods</H3><%
' 创建并打开 Connection 对象。
Set OBJdbConnection = Server.CreateObject("ADODB.Connection")
OBJdbConnection.Open "AdvWorks"
' 创建并打开 Recordset 对象。
Set RsCustomerList = Server.CreateObject("ADODB.Recordset")
RsCustomerList.ActiveConnection = OBJdbConnection
RsCustomerList.CursorType = adOpenKeyset
RsCustomerList.LockType = adLockOptimistic
RsCustomerList.Source = "Customers"RsCustomerList.Open ' 检查该会话中用户移动的数目，以窗体中的数量作为增量。
Session("Clicks") = Session("Clicks") + Request.Form("MoveAmount")
Clicks = Session("Clicks")
' 移动到上次已知的记录集位置加上由 Form Post 方法传递的数量。
RsCustomerList.Move CInt(Clicks)' 出错处理。
If RsCustomerList.EOF Then
Session("Clicks") = RsCustomerList.RecordCount
Response.Write "This is the Last Record"
RsCustomerList.MoveLast
Else If RsCustomerList.BOF Then
Session("Clicks") = 1
RsCustomerList.MoveFirst
Response.Write "This is the First Record"
End If
End If%><H3>Current Record Number is <BR>
<% If Session("Clicks") = 0 Then
Session("Clicks") = 1
End If
Response.Write(Session("Clicks") )%> of <%=RsCustomerList.RecordCount%></H3>
<HR>
<Center><TABLE COLSPAN=8 CELLPADDING=5 BORDER=0><!-- Customer 表的 BEGIN 列标头行 --><TR><TD ALIGN=CENTER BGCOLOR="#008080">
<FONT STYLE="ARIAL NARROW" COLOR="#ffffff" SIZE=1>Company Name</FONT>
</TD>
<TD ALIGN=CENTER BGCOLOR="#008080">
<FONT STYLE="ARIAL NARROW" COLOR="#ffffff" SIZE=1>Contact Name</FONT>
</TD>
<TD ALIGN=CENTER WIDTH=150 BGCOLOR="#008080">
<FONT STYLE="ARIAL NARROW" COLOR="#ffffff" SIZE=1>Phone Number</FONT>
</TD>
<TD ALIGN=CENTER BGCOLOR="#008080">
<FONT STYLE="ARIAL NARROW" COLOR="#ffffff" SIZE=1>City</FONT>
</TD>
<TD ALIGN=CENTER BGCOLOR="#008080">
<FONT STYLE="ARIAL NARROW" COLOR="#ffffff" SIZE=1>State/Province</FONT>
</TD></TR><!-- 显示 Customer 表的 ADO 数据 --> <TR>
<TD BGCOLOR="f7efde" ALIGN=CENTER>
<FONT STYLE="ARIAL NARROW" SIZE=1>
<%= RSCustomerList("CompanyName")%>
</FONT></TD>
<TD BGCOLOR="f7efde" ALIGN=CENTER>
<FONT STYLE="ARIAL NARROW" SIZE=1>
<%= RScustomerList("ContactLastName") & ", " %>
<%= RScustomerList("ContactFirstName") %>
</FONT></TD>
<TD BGCOLOR="f7efde" ALIGN=CENTER>
<FONT STYLE="ARIAL NARROW" SIZE=1>
<%= RScustomerList("PhoneNumber")%>
</FONT></TD>
<TD BGCOLOR="f7efde" ALIGN=CENTER>
<FONT STYLE="ARIAL NARROW" SIZE=1>
<%= RScustomerList("City")%>
</FONT></TD>
<TD BGCOLOR="f7efde" ALIGN=CENTER>
<FONT STYLE="ARIAL NARROW" SIZE=1>
<%= RScustomerList("StateOrProvince")%>
</FONT></TD>
</TR> </Table></FONT>
<HR>
<Input Type = Button Name = cmdDown Value = "< ">
<Input Type = Button Name = cmdUp Value = " >">
<H5>Click Direction Arrows for Previous or Next Record
<BR> Click Move Amount to use Move Method
Enter Number of Records to Move + or - </H5><Table><Form Method = Post Action="Move.asp" Name=Form><TR><TD><Input Type="Button" Name = Move Value="Move Amount "></TD><TD></TD><TD>
<Input Type="Text" Size="4" Name="MoveAmount" Value = 0></TD><TR>
</Form></Table></Center></BODY><Script Language = "VBScript">Sub Move_OnClick
' 确认输入的移动值为整型。
If IsNumeric(Document.Form.MoveAmount.Value)Then
Document.Form.MoveAmount.Value = CInt(Document.Form.MoveAmount.Value)
Document.Form.Submit
Else
MsgBox "You Must Enter a Number", ,"ADO-ASP Example"
Document.Form.MoveAmount.Value = 0
End IfEnd SubSub cmdDown_OnClickDocument.Form.MoveAmount.Value = -1
Document.Form.SubmitEnd SubSub cmdUp_OnClickDocument.Form.MoveAmount.Value = 1
Document.Form.SubmitEnd Sub</Script>
</HTML>
</pre>
<center> <A HREF="http://www.51windows.Net">www.51windows.Net</A></center>
<SCRIPT LANGUAGE="JavaScript" src="/log/sitelog2.asp"></SCRIPT>
<script src="script.js"></script></BODY>
</HTML>
⌨️ 快捷键说明
复制代码
Ctrl + C
搜索代码
Ctrl + F
全屏模式
F11
切换主题
Ctrl + Shift + D
显示快捷键
?
增大字号
Ctrl + =
减小字号
Ctrl + -