<td colspan="2">
<asp:TextBox ID="TextBox1" runat="server" onkeydown="return isNumeric(event.keyCode);" Text="220"></asp:TextBox></td>
</tr>
<tr>
<td align="right">开关</td>
<td colspan="2">
<asp:CheckBox ID="CheckBoxSwitch" runat="server" AutoPostBack="true" OnCheckedChanged="CheckBoxSwitch_CheckedChanged" /></td>
</tr>
<tr>
<td align="right">灯</td>
<td>
<fieldset style="width: 200px;">
<legend>Light 1
</legend>
<asp:Image ID="Image1" runat="server" ImageUrl="Images/Light_C.gif" Width="36" Height="55" /><br />
<asp:Label ID="Label1" runat="server" Text=""></asp:Label>
</fieldset>
</td>
<td>
<fieldset style="width: 250px;">
<legend>Light 2
</legend>
<asp:Image ID="Image2" runat="server" ImageUrl="Images/Light_C.gif" Width="36" Height="55" /><br />
<asp:Label ID="Label2" runat="server" Text=""></asp:Label>
</fieldset>
</td>
</tr>
</table>
</form>
</body>
</html>
接下来，看看开关的事开与关的事件，有详细的注解：
Default.aspx.cs
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using Insus.NET;
public partial class _Default : System.Web.UI.Page
{
string offLight = "~/Images/Light_C.gif";
string onLight = "~/Images/Light_O.gif";
protected void Page_Load(object sender, EventArgs e)
{
}
protected void CheckBoxSwitch_CheckedChanged(object sender, EventArgs e)
{
var cb = (CheckBox)sender;
//插座缺少电压为220伏
int input = Convert.ToInt32(string.IsNullOrEmpty(this.TextBox1.Text.Trim()) ? "220" : this.TextBox1.Text.Trim());
//开关打开
if (cb.Checked)
{
try
{
//实例一个电灯
Light light = new Light();
//插入插座，使用插座电压
light.InputVoltage = input;
//电灯被打开
this.Image1.ImageUrl = onLight;
//显示正常输出电压
this.Label1.Text = light.InputVoltage.ToString();
}
catch (Exception ex)
{
//如果电压不正常，电灯打不开或是被烧坏。
this.Image1.ImageUrl = offLight;
//显示异常信息。
this.Label1.Text = ex.Message;
}
try
{
Light light = new Light();
//使用电源适配器
PowerAdapter pa = new PowerAdapter(light);
pa.InputVoltage = input;
this.Image2.ImageUrl = onLight;
this.Label2.Text = pa.InputVoltage.ToString();
}
catch (Exception ex)
{
this.Image2.ImageUrl = offLight;
this.Label2.Text = ex.Message;
}
this.TextBox1.Enabled = false;
}
//开关关闭
else
{
this.TextBox1.Text = string.Empty;
this.TextBox1.Enabled = true;
this.Image1.ImageUrl = offLight;
