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26.4.1 会议登记 Web服务
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26.4.1 会议登记 Web服务
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2006-10-13 14:41:00
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<div style='float:left;width:49%'>·<a href='100165692.htm'>26.3.1 创建Web服务</a></div><div style='float:right;width:49%'>·<a href='100165693.htm'>26.3.2 使用Web服务</a></div><div style='float:left;width:49%'>·<a href='100165694.htm'>26.4 扩充会议登记示例</a></div><div style='float:right;width:49%'>·<a href='100165696.htm'>26.4.2 会议登记客户程序</a></div><div style='float:left;width:49%'>·<a href='100165697.htm'>26.5 使用SOAP标题交换数据</a></div><div style='float:right;width:49%'>·<a href='100165698.htm'>26.6 小结</a></div></div>
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<link href="css.css" rel="stylesheet" type="text/css" /><h3 style='margin-top:8.15pt;margin-right:0cm;FTEL:8.15pt;margin-left:
0cm'><a FTEL="_Toc507815262"><span lang=EN-US>26.4.1 </span></a><span
style='font-family:黑体'>会议登记</span><span lang=EN-US> Web</span><span
style='font-family:黑体'>服务</span></h3>
<p class=MsoNormal><span style='font-family:宋体'>在</span><span lang=EN-US>VS.NET</span><span
style='font-family:宋体'>中创建一个名称为</span><span lang=EN-US>PCSWebSrv2</span><span
style='font-family:宋体'>的新</span><span lang=EN-US>Web</span><span
style='font-family:宋体'>服务项目。首先，在</span><span lang=EN-US>global.asax</span><span
style='font-family:宋体'>的</span><span lang=EN-US>Application_Start()</span><span
style='font-family:宋体'>处理程序中给项目添加一些代码。把</span><span lang=EN-US>PCSWebApp3.mdb</span><span
style='font-family:宋体'>中的所有数据都载入到数据集中并且保存数据集，其中涉及的大部分代码前面已讨论过，因为前面已经把数据库载入到</span><span
lang=EN-US>DataSet</span><span style='font-family:宋体'>中。实际上，可以从第</span><span
lang=EN-US>25</span><span style='font-family:宋体'>章的</span><span lang=EN-US>PCSWebApp3</span><span
style='font-family:宋体'>的</span><span lang=EN-US>WebForm1.aspx.cs</span><span
style='font-family:宋体'>中复制需要的所有代码，其中包括</span><span lang=EN-US>InitializeComponent()</span><span
style='font-family:宋体'>中的数据库连接字符串</span><span lang=EN-US>(</span><span
style='font-family:宋体'>因为您使用的连接字符串有可能不相同，所以这里就不显示了</span><span lang=EN-US>)</span><span
style='font-family:宋体;letter-spacing:-1.0pt'>——</span><span style='letter-spacing:
-1.0pt'> </span><span style='font-family:宋体'>只有几处需要修改：</span></p>
<p class=2 style='margin-top:8.15pt;margin-right:0cm;FTEL:0cm;
margin-left:21.45pt;FTEL:.0001pt;FTEL:18.45pt'><span
lang=EN-US> protected void
Application_Start(Object sender, EventArgs e)</span></p>
<p class=2 style='margin-left:21.45pt;FTEL:18.45pt;line-height:13.0pt'><span
lang=EN-US> {</span></p>
<p class=2 style='margin-left:21.45pt;FTEL:18.45pt;line-height:13.0pt'><a
FTEL="OLE_LINK3"><span lang=EN-US>
System.Data.DataSet ds;</span></a></p>
<p class=2 style='margin-left:21.45pt;FTEL:18.45pt;line-height:13.0pt'><span
lang=EN-US>
System.Data.OleDb.OleDbConnection oleDbConnection1;</span></p>
<p class=2 style='margin-left:21.45pt;FTEL:18.45pt;line-height:13.0pt'><span
lang=EN-US>
System.Data.OleDb.OleDbDataAdapter daAttendees;</span></p>
<p class=2 style='margin-left:21.45pt;FTEL:18.45pt;line-height:13.0pt'><span
lang=EN-US>
System.Data.OleDb.OleDbDataAdapter daRooms;</span></p>
<p class=2 style='margin-left:21.45pt;FTEL:18.45pt;line-height:13.0pt'><span
lang=EN-US>
System.Data.OleDb.OleDbDataAdapter daEvents;</span></p>
<p class=2 style='margin-left:21.45pt;FTEL:18.45pt;line-height:13.0pt'><span
lang=EN-US> </span></p>
<p class=2 style='margin-left:21.45pt;FTEL:18.45pt;line-height:13.0pt'><span
lang=EN-US> oleDbConnection1 =
new System.Data.OleDb.OleDbConnection();</span></p>
<p class=2 style='margin-left:21.45pt;FTEL:18.45pt;line-height:13.0pt'><span
lang=EN-US>
oleDbConnection1.ConnectionString = @" ... ";</span></p>
<p class=2 style='margin-left:21.45pt;FTEL:18.45pt;line-height:13.0pt'><span
lang=EN-US>
oleDbConnection1.Open();</span></p>
<p class=2 style='margin-left:21.45pt;FTEL:18.45pt;line-height:13.0pt'><span
lang=EN-US> ds = new DataSet();</span></p>
<p class=2 style='margin-left:21.45pt;FTEL:18.45pt;line-height:13.0pt'><span
lang=EN-US> daAttendees = new
System.Data.OleDb.OleDbDataAdapter(</span></p>
<p class=2 style='margin-left:21.45pt;FTEL:18.45pt;line-height:13.0pt'><span
lang=EN-US>
"SELECT * FROM Attendees", oleDbConnection1);</span></p>
<p class=2 style='margin-left:21.45pt;FTEL:18.45pt;line-height:13.0pt'><span
lang=EN-US> daRooms = new
System.Data.OleDb.OleDbDataAdapter(</span></p>
<p class=2 style='margin-left:21.45pt;FTEL:18.45pt;line-height:13.0pt'><span
lang=EN-US>
"SELECT * FROM Rooms", oleDbConnection1);</span></p>
<p class=2 style='margin-left:21.45pt;FTEL:18.45pt;line-height:13.0pt'><span
lang=EN-US> daEvents = new
System.Data.OleDb.OleDbDataAdapter(</span></p>
<p class=2 style='margin-left:21.45pt;FTEL:18.45pt;line-height:13.0pt'><span
lang=EN-US>
"SELECT * FROM Events", oleDbConnection1);</span></p>
<p class=2 style='margin-left:21.45pt;FTEL:18.45pt;line-height:13.0pt'><span
lang=EN-US>
daAttendees.Fill(ds, "Attendees");</span></p>
<p class=2 style='margin-left:21.45pt;FTEL:18.45pt;line-height:13.0pt'><span
lang=EN-US> daRooms.Fill(ds,
"Rooms");</span></p>
<p class=2 style='margin-left:21.45pt;FTEL:18.45pt;line-height:13.0pt'><span
lang=EN-US> daEvents.Fill(ds,
"Events");</span></p>
<p class=2 style='margin-left:21.45pt;FTEL:18.45pt;line-height:13.0pt'><span
lang=EN-US>
oleDbConnection1.Close();</span></p>
<p class=2 style='margin-left:21.45pt;FTEL:18.45pt;line-height:13.0pt'><span
lang=EN-US> </span></p>
<p class=2 style='margin-left:21.45pt;FTEL:18.45pt;line-height:13.0pt'><span
lang=EN-US>
Application["ds"] = ds;</span></p>
<p class=2 style='margin-top:0cm;margin-right:0cm;FTEL:8.15pt;
margin-left:21.45pt;FTEL:18.45pt'><span lang=EN-US>
}</span></p>
<p class=MsoNormal><span style='font-family:宋体'>这里需要注意代码中的最后一行。通常，</span><span
lang=EN-US>Application(</span><span style='font-family:宋体'>以及</span><span
lang=EN-US>Session)</span><span style='font-family:宋体'>对象都有一个名</span><span
lang=EN-US>/</span><span style='font-family:宋体'>值对的集合，可以在该集合中保存数据。这里在</span><span
lang=EN-US>Application</span><span style='font-family:宋体'>存储中创建一个名称</span><span
lang=EN-US>ds</span><span style='font-family:宋体'>，它从数据库中提取数据集</span><span
lang=EN-US>ds</span><span style='font-family:宋体'>的串行化值，其中包含表</span><span
lang=EN-US>Attendees</span><span style='font-family:宋体'>、</span><span
lang=EN-US>Rooms</span><span style='font-family:宋体'>和</span><span lang=EN-US>Events</span><span
style='font-family:宋体'>。这样，</span><span lang=EN-US>Web</span><span
style='font-family:宋体'>服务对象的所有实例在任何时间都可以访问</span><span lang=EN-US>ds</span><span
style='font-family:宋体'>中保存的值。</span></p>
<p class=MsoNormal><span style='font-family:宋体'>为了能使上面的代码正常执行，也需要给</span><span
lang=EN-US>global.asax.cs</span><span style='font-family:宋体'>添加一个对</span><span
lang=EN-US>System.data</span><span style='font-family:宋体'>命名空间的引用：</span></p>
<p class=a6 style='margin-top:8.15pt;margin-right:0cm;FTEL:0cm;
margin-left:21.45pt;FTEL:.0001pt;FTEL:18.45pt'><span
lang=EN-US>...</span></p>
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