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<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>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; private void calendar</span><span
lang=EN-US style='font-family:"Baskerville BE Regular"'>_</span><span
lang=EN-US>SelectionChanged(object sender,</span></p>

<p class=a6 style='margin-left:21.45pt;FTEL:18.45pt'><span lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
System.EventArgs e)</span><span class=MsoCommentReference><span lang=EN-US
style='font-size:8.0pt;font-family:"Baskerville BE Regular";display:none;
letter-spacing:.2pt'> </span></span></p>

<p class=a6 style='margin-left:21.45pt;FTEL:18.45pt'><span lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
{</span></p>

<p class=2 style='margin-left:21.45pt;FTEL:18.45pt'><span lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
System.DateTime trialDate = calendar.SelectedDate;</span></p>

<p class=2 style='margin-left:21.45pt;FTEL:18.45pt'><span lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
calendar.SelectedDate = getFreeDate(trialDate);</span></p>

<p class=a6 style='margin-top:0cm;margin-right:0cm;FTEL:8.15pt;
margin-left:21.45pt;FTEL:18.45pt'><span lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
}</span></p>

<p class=MsoNormal><span style='font-family:宋体'>这段代码与</span><span lang=EN-US>Page_Load()</span><span
style='font-family:宋体'>相同。</span></p>

<p class=MsoNormal><span style='font-family:宋体'>执行这种检查的第三个地方是响应登记按钮的单击。后面会解释它，因为后面进行了许多改变。</span></p>

<p class=MsoNormal><span style='font-family:宋体'>接着把日历的日期单元格变为另一种颜色，以表示现存的会议。为此，需要给日期对象的</span><span
lang=EN-US>DayRender</span><span style='font-family:宋体'>事件添加一个事件处理程序。每次显示一个日期时，都会触发这个事件，并允许通过在处理程序中接收到的</span><span
lang=EN-US>DayRenderEventArgs</span><span style='font-family:宋体'>参数的</span><span
lang=EN-US>Cell </span><span style='font-family:宋体'>和</span><span lang=EN-US>
Date</span><span style='font-family:宋体'>属性，访问要显示的单元格对象和这个单元格的日期。我们需要比较要显示的单元格中的日期和</span><span
lang=EN-US>eventTable</span><span style='font-family:宋体'>对象中的日期，如果匹配，就可以使用</span><span
lang=EN-US>Cell.BackColor</span><span style='font-family:宋体'>属性为单元格着色：</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>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; protected void calendar</span><span
lang=EN-US style='font-family:"Baskerville BE Regular"'>_</span><span
lang=EN-US>DayRender(object sender,</span></p>

<p class=2 style='margin-left:21.45pt;FTEL:18.45pt'><span lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
System.Web.UI.WebControls.DayRenderEventArgs e)</span><span
class=MsoCommentReference><span lang=EN-US style='font-size:8.0pt;font-family:
"Baskerville BE Regular";display:none;letter-spacing:.2pt'> </span></span></p>

<p class=2 style='margin-left:21.45pt;FTEL:18.45pt'><span lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
{</span></p>

<p class=2 style='margin-left:21.45pt;FTEL:18.45pt'><span lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
if (eventTable.Rows.Count &gt; 0)</span></p>

<p class=2 style='margin-left:21.45pt;FTEL:18.45pt'><span lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
{</span></p>

<p class=2 style='margin-left:21.45pt;FTEL:18.45pt'><span lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
System.DateTime testDate;</span></p>

<p class=2 style='margin-left:21.45pt;FTEL:18.45pt'><span lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
foreach (System.Data.DataRow testRow in eventTable.Rows)</span></p>

<p class=2 style='margin-left:21.45pt;FTEL:18.45pt'><span lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
{</span></p>

<p class=2 style='margin-left:21.45pt;FTEL:18.45pt'><span lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
testDate = (System.DateTime)testRow[&quot;EventDate&quot;];</span></p>

<p class=2 style='margin-left:21.45pt;FTEL:18.45pt'><span lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
if (testDate.Date == e.Day.Date)</span></p>

<p class=2 style='margin-left:21.45pt;FTEL:18.45pt'><span lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
{</span></p>

<p class=2 style='margin-left:21.45pt;FTEL:18.45pt'><span lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
e.Cell.BackColor = Color.Red;</span></p>

<p class=2 style='margin-left:21.45pt;FTEL:18.45pt'><span lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
}</span></p>

<p class=2 style='margin-left:21.45pt;FTEL:18.45pt'><span lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
} </span></p>

<p class=2 style='margin-left:21.45pt;FTEL:18.45pt'><span lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
}</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>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
}</span></p>

<p class=MsoNormal><span style='font-family:宋体'>这里使用红色，得到屏幕图</span><span
lang=EN-US>25-6</span><span style='font-family:宋体'>。三月的</span><span lang=EN-US>15</span><span
style='font-family:宋体'>、</span><span lang=EN-US>27</span><span
style='font-family:宋体'>、</span><span lang=EN-US>28</span><span
style='font-family:宋体'>、</span><span lang=EN-US>29</span><span
style='font-family:宋体'>和</span><span lang=EN-US>30</span><span
style='font-family:宋体'>日都有会议，所以用户选择了</span><span lang=EN-US>17</span><span
style='font-family:宋体'>日。</span></p>

<p align=center><span lang=EN-US><img width=119 height=115
src="25/image007.jpg"></span></p>

<p align=center style='FTEL:8.15pt'><span style='font-family:宋体'>图</span><span
lang=EN-US>&nbsp; 25-6</span></p>

<p class=MsoNormal><span style='font-family:宋体'>添加了日期选择逻辑后，就不可能选择显示为红色的一天，如果要选择这样的日期，就会选择该日期后面的某一天。例如，在图</span><span
lang=EN-US>25-6</span><span style='font-family:宋体'>的日历中单击</span><span
lang=EN-US>3</span><span style='font-family:宋体'>月</span><span lang=EN-US>28</span><span
style='font-family:宋体'>日，就会选择</span><span lang=EN-US>31</span><span
style='font-family:宋体'>日。</span></p>

<h4 style='FTEL:21.45pt'><span lang=EN-US>4. </span><span
style='font-family:黑体'>给数据库添加会议数据</span></h4>

<p class=MsoNormal><a FTEL=database2></a><span
lang=EN-US>submitButton_Click()</span><span style='font-family:宋体'>事件处理程序目前从会议特性中组合了一个字符串，并在</span><span
lang=EN-US> reulstLabel</span><span style='font-family:宋体'>控件中显示它。要给数据库添加一个会议，需要把创建出来的字符串重新格式化到一个</span><span
lang=EN-US>SQL INSERT</span><span style='font-family:宋体'>查询中，并执行它。</span></p>

<p class=a3 style='margin-top:8.15pt;FTEL:21.45pt'><span
style='font-family:黑体'>注意：</span></p>

<p class=a1 style='FTEL:8.15pt;FTEL:21.45pt'><span
style='font-family:楷体_GB2312'>为了把数据写入</span><span lang=EN-US>Access</span><span
style='font-family:楷体_GB2312'>数据库，</span><span lang=EN-US>ASPNET</span><span
style='font-family:楷体_GB2312'>用户</span><span lang=EN-US>(</span><span
style='font-family:楷体_GB2312'>在默认情况下运行</span><span lang=EN-US>ASP.NET</span><span
style='font-family:楷体_GB2312'>进程的账户</span><span lang=EN-US>)</span><span
style='font-family:楷体_GB2312'>必须明确地拥有文件的写入许可。这可以使用</span><span lang=EN-US>Windows</span><span
style='font-family:楷体_GB2312'>资源管理器来赋予。在比较高级的场合下，可以使用其他账户访问资源，例如域账户用于访问网络上其他地方的</span><span
lang=EN-US>SQL Server</span><span style='font-family:楷体_GB2312'>实例。在</span><span
lang=EN-US>ASP.NET</span><span style='font-family:楷体_GB2312'>中有这个功能</span><span
lang=EN-US>(</span><span style='font-family:楷体_GB2312'>通过模拟、</span><span
lang=EN-US>COM+</span><span style='font-family:楷体_GB2312'>服务或其他方式实现</span><span
lang=EN-US>)</span><span style='font-family:楷体_GB2312'>，但它超出了本书的范围。</span></p>

<p class=MsoNormal><span style='font-family:宋体'>下面的许多代码都是很熟悉的：</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>&nbsp;&nbsp;&nbsp;&nbsp; protected void submitButton</span><span
lang=EN-US style='font-family:"Baskerville BE Regular"'>_</span><span
lang=EN-US>Click(object sender, System.EventArgs e)</span></p>

<p class=a6 style='margin-left:21.45pt;FTEL:18.45pt'><span lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;
{</span></p>

<p class=a6 style='margin-left:21.45pt;FTEL:18.45pt'><span lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
if (this.IsValid)</span></p>

<p class=a6 style='margin-left:21.45pt;FTEL:18.45pt'><span lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
{</span></p>

<p class=2 style='margin-left:21.45pt;FTEL:18.45pt'><span lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
String attendees = &quot;&quot;;</span></p>

<p class=2 style='margin-left:21.45pt;FTEL:18.45pt'><span lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
foreach (ListItem attendee in attendeeList.Items)</span></p>

<p class=2 style='margin-left:21.45pt;FTEL:18.45pt'><span lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
{</span></p>

<p class=2 style='margin-left:21.45pt;FTEL:18.45pt'><span lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
if (attendee.Selected)</span></p>

<p class=2 style='margin-left:21.45pt;FTEL:18.45pt'><span lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
{</span></p>

<p class=2 style='margin-left:21.45pt;FTEL:18.45pt'><span lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
attendees += attendee.Text + &quot; (&quot; + attendee.Value + &quot;), &quot;;</span></p>

<p class=2 style='margin-left:21.45pt;FTEL:18.45pt'><span lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
}</span></p>

<p class=2 style='margin-left:21.45pt;FTEL:18.45pt'><span lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
}</span></p>