封装|数据|数据库|组件封装
使用组件封装数据库操作(二)
前段日子发表的文章，数据库的连接代码可以直接在ASP文件中显示出来。这次又进行了一次封装。
打开vb，新建Activex控件，工程名称为WebDb，类模块名称为GetInfomation
引用”Microsoft Activex Data Object 2.6 Library ”
Private Conn As ADODB.Connection
Private Rs As ADODB.Recordset
‘作用:判断数据库是否正确连结
'自己可以更改连接串
Public Function GetConn()
Conn.Open "Provider=SQLOLEDB.1;Persist Security Info=False;User ID=sa;Initial Catalog=Northwind;Data Source=yang"
If Err.Number <> 0 Then
GetConn = False
Else
GetConn = True
End If
End Function
‘根据输入的雇员ID,得到雇员的名称
Public Function GetEmployeeName(strEmployeeID As Integer) As String
Dim strSql As String
Set rs = New ADODB.Recordset
strSql = "select LastName+firstname from employees where EmployeeID=" & strEmployeeID
rs.Open strSql, Conn, adOpenStatic, adLockOptimistic
If rs.EOF Then
GetEmployeeName = ""
Else
GetEmployeeName = rs.Fields(0)
End If
rs.Close
End Function
‘返回所有的雇员列表
Public Function GetEmployeeList() As ADODB.Recordset
Dim strSql As String
Set rs = New ADODB.Recordset
strSql = "select EmployeeID,LastName,FirstName,Title,TitleOfCourtesy,BirthDate,HireDate,Address,City from employees"
rs.CursorLocation = adUseClient
rs.Open strSql, Conn, adOpenStatic
Set GetEmployeeList = rs
'rs.Close
End Function
我们进行测试
新建ASP页面，”TestWebDb1.asp”。主要用来测试GetEmployeeList()方法
<HEAD>
<!- 测试页 ->
<!- 功能：测试组件 ->
<!- 作者：龙卷风.NET ->
<%
Dim strTopic
Dim strTitle
Dim strContents
Dim DataQuery
Dim Rs
Dim Myself
Myself=Request.ServerVariables("script_name")
Set DataQuery=Server.CreateObject("WebDb.GetInfomation")
Set Rs=Server.CreateObject("adodb.recordset")
%>
<TITLE>
数据组件测试页
</TITLE>
<H1><CENTER>欢迎使用数据组件(www.ourfly.com)</CENTER></H1>
<%
Dim Flag
Flag=DataQuery.GetConn()
If Flag=false then
ResPonse.Write "数据库没有连结,请检查"
ResPonse.End
End if
Set Rs=DataQuery.GetEmployeeList()
if rs.eof then
Response.write "没有数据,请查询"
Response.end
end if
Rs.PageSize =3
Page= CLng(Request.QueryString ("Page"))
If Page < 1 Then Page = 1
If Page > Rs.PageCount Then Page = Rs.PageCount
Response.Write "<CENTER><TABLE BORDER=1 cellspacing=0 cellpadding=2>"
Response.Write "<tr BGCOLOR=silver align=center>"
Response.Write "<td>EmployeeID</TD>"
Response.Write "<td>LastName</td>"
Response.Write "<td>FirstName</td>"
Response.Write "<td>Title</a></td>"
Response.Write "<td>TitleOfCourtesy</a></td>"
Response.Write "<td>BirthDate</td>"
Response.Write "<td>HireDate</td>"
Response.Write "<td>Address</td>"
Response.Write "<td>City</td>"
Response.Write "</tr>"
Rs.AbsolutePage = Page
For iPage = 1 To Rs.Pag