上一篇简单的讲了从WebControl继承的控件(好象我讲的都是简单的,嘿嘿).本次讲的更简单,主题是是属性,只当分享经验,希望对大家有帮助
我们根据属性的不同表现形式,把其区分为简单属性和复杂属性
下面来看下属性的表现形式
简单属性表现形式如下,大家都很熟悉
<asp:TextBox ID="TextBox1" Text="textbox控件" runat="server"></asp:TextBox>
属性中含有子属性,称之为复杂对象,如Font属性
复杂属性的表现形式如下,
(1)连字符的表现形式
<asp:TextBox ID="TextBox1" Text="textbox控件" runat="server" Font-Bold="True"></asp:TextBox>
(2)内镶属性的表现形式,如定义样式
<asp:DataList ID="DataList1" runat="server">
<SelectedItemStyle />
<EditItemStyle />
</asp:DataList>
(3)内镶集合属性的表现形式,如DropDownList (先不介绍,大家可看MSDN)
<asp:DropDownList ID="DropDownList1" runat="server">
<asp:ListItem>x</asp:ListItem>
<asp:ListItem>xx</asp:ListItem>
<asp:ListItem>xxx</asp:ListItem>
</asp:DropDownList>
下面得好好看
1,复杂属性基本使用方法
请看我是怎么做的,关于下面看到了一些元数据,如果你不熟悉,请参考MSDN.
下面一段代码记录一个custom的信息.
1.1 定义枚举
using System;
![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
namespace CustomComponents
{
/// <summary>
/// 职业
/// </summary>
public enum Metier
{
教师,程序员,作家
}
}
1.2定义复杂属性
using System;
using System.ComponentModel;
![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
namespace CustomComponents
{
![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
/// <summary>
/// 地址集合
/// </summary>
public class Address
{
private String street = null;
private String city = null;
private String state = null;
private String zip = null;
![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
public String Street
{
get
{
return street;
}
set
{
street = value;
}
}
![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
public String City
{
get
{
return city;
}
set
{
city = value;
}
}
![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
public String State
{
get
{
return state;
}
set
{
state = value;
}
}
![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
public String Zip
{
get
{
return zip;
}
set
{
zip = value;
}
}
}
}
1.3 呈现控件
![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedBlockStart.gif)
using System;
using System.ComponentModel;
using System.Web;
using System.Web.UI;
![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
namespace CustomComponents
{
public class Custom: Control
{
private String name = null;
Address address = new Address();
private Metier metier;
private int age = 0;
![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
属性
![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
protected override void Render(HtmlTextWriter output)
{
output.Write("姓名: " + Name + "<br>");
output.Write("年龄: " + Age + "<br>");
output.Write("职业: " + CustomMetier + "<br>");
output.Write("具体地址: " + CustomAddress.Street + "<br> 城市: "
+ CustomAddress.City + "<br> 国籍: " +
CustomAddress.State + "<br> 邮编: " + CustomAddress.Zip + "<br>");
}
}
}
1.4 在asp.net页面定义控件,
发现问题:属性不是有效属性,如下图
![](https://www.cnblogs.com/images/cnblogs_com/clingingboy/ServerControl/ch5/ch1.jpg)
打开后台代码,输入如下代码检查属性,发现属性是存在的,如下图,再打开视图,发现控件能显示属性,唯一的就是不能认识属性为有效属性,在源视图也无法找到这几个属性.
![](https://www.cnblogs.com/images/cnblogs_com/clingingboy/ServerControl/ch5/ch2.jpg)
1.5 解决1.4无法显示有效属性的问题,(其实以上的测试已经实现复杂属性了).
解决方法:请在Custom类中的CustomAddress中加入一个元数据(元数据的解释请参考MSDN),如下
[Description("地址集合")]
[DesignerSerializationVisibility(DesignerSerializationVisibility.Content)]
public Address CustomAddress
{
get
{
return address;
}
}
再次打开源视图,发现编辑器已经支持此属性了,如下图,这样有点意思吧,呵呵
![](https://www.cnblogs.com/images/cnblogs_com/clingingboy/ServerControl/ch5/ch3.jpg)
虽 然源视图上已经支持这个复杂属性了,打开属性面板,发现属性面板并不支持这个复杂属性(因为我们比较懒,不喜欢在源视图里编辑属性,想直接在属性面板编辑 属性,下面就称复杂属性是CustomAddress),我们想要达到的效果,是让CustomAddress属性跟Font属性一样(可以折叠)显示在面板上,如下图
![](https://www.cnblogs.com/images/cnblogs_com/clingingboy/ServerControl/ch5/ch4.jpg)
发现问题:属性面板并不支持这个复杂属性
1.6 实现CustomAddress属性折叠效果
解决方法:给Address类添加一个元数据,如下
[TypeConverter(typeof(ExpandableObjectConverter))]
public class Address
{
. }
编译后,再次打开属性面板,发现CustomAddress属性已经支持折叠效果,如下图
![](https://www.cnblogs.com/images/cnblogs_com/clingingboy/ServerControl/ch5/ch5.jpg)
试着在属性面板编辑CustomAddress的子属性,修改好子属性以后然后运行页面,发现子属性修改数据后无效
发现问题:在属性面板编辑复杂属性的子属性无效
1.7 解决属性面板编辑复杂属性的子属性无效的问题
解决方法:为Address类的每个属性加上一个元数据,如下
[NotifyParentProperty(true)]
public String Street
{
get
{
return street;
}
set
{
street = value;
}
}
编译后,回到原asp.net的页面,再次在属性面板里修改子属性,再次运行页面.发现修改后的数据生效了.
好了,以上代码就是连字符形式的复杂属性的实现,我们接着继续,我们希望把CustomAddress属性做为内镶属性使用,即如下代码的形式
<custom:custom id="Custom1" runat="server" name="Clingingboy" CustomMetier="教师" Age="21">
<CustomAddress City="杭州" Street="不告诉你" State="中国" Zip="310000" />
</custom:custom>
发现问题:无法使用内镶属性
1.8 实现内镶属性
解决方法:在Custom类中给CustomAddress再加入一个元数据(第三个),如下
[Description("地址集合")]
[DesignerSerializationVisibility(DesignerSerializationVisibility.Content)]
[PersistenceMode(PersistenceMode.InnerProperty)]
public Address CustomAddress
{
get
{
return address;
}
}
打开源视图(请不要把原来的连字符属性去掉),在控件内部加入如下代码(编辑器已经支持此属性了)
<custom:custom
CustomAddress-Zip="3100001" CustomAddress-City="杭州1"
CustomAddress-State="中国1" CustomAddress-Street="不告诉你1"
id="Custom1" runat="server" name="Clingingboy" CustomMetier="教师" Age="21">
<CustomAddress City="杭州" Street="不告诉你" State="中国" Zip="310000" />
</custom:custom>
发现问题:查看属性面板,再次修改CustomAddress子属性,然后运行,发现修改后无效果,而且显示的数据仍然是连字符属性的数据(非内镶属性的)
1.9 让控件支持内镶属性
解决方法:给Custom类添加元数据,如下代码
[ParseChildren(true)]
public class Custom: Control
{
}
编译后,再次测试发现属性显示的优先级发生了变化,在内镶属性存在的时候,显示内镶属性,若其中有子属性不存在,则显示连字符属性,大家可以适当更改内镶属性和连字符属性测试变化.
发现问题:在属性面板改变属性时,仍然无法使修改后的数据生效,且修改后,数据退回初始的数据,并且导致内镶属性消失
1.10 解决属性面板的问题
解决方法:给Custom类再添加一个元数据,如下代码
[ParseChildren(true)]
[PersistChildren(false)]
public class Custom: Control
{
}
编译后再次修改属性面板的值,发现修改的是内镶属性的数据,而且这次修改后数据没有丢失,运行后也是修改后的效果.
好了,简单的讲完了.
总结下:上面刚开始到1.3为止,其实效果已经实现了,接下来都是添加元数据,添加以后给我们带来的是方便.以上解决问题的办法全是套用元数据.可能上面的元数据大家很熟悉,在MSDN里面字面解释的也很清楚,但你去试验过吗?我相信这样的试验可以让你明白的更加深刻.
这次讲的虽然很简单(难得我把这么简单的东西变的这么复杂),主要是学习学习方法了
但我还是希望对大家有帮助,上面如果哪里讲错了还请指出来^_^.
示例代码下载(请大家多修改):
参考文章:
ASP.NET 2.0服务器控件开发之简单属性
ASP.NET 2.0服务器控件开发之复杂属性
我们根据属性的不同表现形式,把其区分为简单属性和复杂属性
下面来看下属性的表现形式
简单属性表现形式如下,大家都很熟悉
![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
属性中含有子属性,称之为复杂对象,如Font属性
复杂属性的表现形式如下,
(1)连字符的表现形式
![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
(2)内镶属性的表现形式,如定义样式
![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
(3)内镶集合属性的表现形式,如DropDownList (先不介绍,大家可看MSDN)
![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
下面得好好看
1,复杂属性基本使用方法
请看我是怎么做的,关于下面看到了一些元数据,如果你不熟悉,请参考MSDN.
下面一段代码记录一个custom的信息.
1.1 定义枚举
![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedBlockStart.gif)
![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedBlockEnd.gif)
1.2定义复杂属性
![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedBlockStart.gif)
![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedBlockEnd.gif)
1.3 呈现控件
![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedBlockStart.gif)
![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedBlockStart.gif)
![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
![](https://www.cnblogs.com/Images/OutliningIndicators/ContractedSubBlock.gif)
![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedBlockEnd.gif)
![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
1.4 在asp.net页面定义控件,
发现问题:属性不是有效属性,如下图
![](https://www.cnblogs.com/images/cnblogs_com/clingingboy/ServerControl/ch5/ch1.jpg)
打开后台代码,输入如下代码检查属性,发现属性是存在的,如下图,再打开视图,发现控件能显示属性,唯一的就是不能认识属性为有效属性,在源视图也无法找到这几个属性.
![](https://www.cnblogs.com/images/cnblogs_com/clingingboy/ServerControl/ch5/ch2.jpg)
1.5 解决1.4无法显示有效属性的问题,(其实以上的测试已经实现复杂属性了).
解决方法:请在Custom类中的CustomAddress中加入一个元数据(元数据的解释请参考MSDN),如下
![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedBlockStart.gif)
![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedBlockEnd.gif)
再次打开源视图,发现编辑器已经支持此属性了,如下图,这样有点意思吧,呵呵
![](https://www.cnblogs.com/images/cnblogs_com/clingingboy/ServerControl/ch5/ch3.jpg)
虽 然源视图上已经支持这个复杂属性了,打开属性面板,发现属性面板并不支持这个复杂属性(因为我们比较懒,不喜欢在源视图里编辑属性,想直接在属性面板编辑 属性,下面就称复杂属性是CustomAddress),我们想要达到的效果,是让CustomAddress属性跟Font属性一样(可以折叠)显示在面板上,如下图
![](https://www.cnblogs.com/images/cnblogs_com/clingingboy/ServerControl/ch5/ch4.jpg)
发现问题:属性面板并不支持这个复杂属性
1.6 实现CustomAddress属性折叠效果
解决方法:给Address类添加一个元数据,如下
![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedBlockStart.gif)
![](https://www.cnblogs.com/Images/dot.gif)
编译后,再次打开属性面板,发现CustomAddress属性已经支持折叠效果,如下图
![](https://www.cnblogs.com/images/cnblogs_com/clingingboy/ServerControl/ch5/ch5.jpg)
试着在属性面板编辑CustomAddress的子属性,修改好子属性以后然后运行页面,发现子属性修改数据后无效
发现问题:在属性面板编辑复杂属性的子属性无效
1.7 解决属性面板编辑复杂属性的子属性无效的问题
解决方法:为Address类的每个属性加上一个元数据,如下
![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedBlockStart.gif)
![](https://www.cnblogs.com/Images/dot.gif)
![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedBlockEnd.gif)
编译后,回到原asp.net的页面,再次在属性面板里修改子属性,再次运行页面.发现修改后的数据生效了.
好了,以上代码就是连字符形式的复杂属性的实现,我们接着继续,我们希望把CustomAddress属性做为内镶属性使用,即如下代码的形式
![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
发现问题:无法使用内镶属性
1.8 实现内镶属性
解决方法:在Custom类中给CustomAddress再加入一个元数据(第三个),如下
![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedBlockStart.gif)
![](https://www.cnblogs.com/Images/dot.gif)
![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedBlockEnd.gif)
打开源视图(请不要把原来的连字符属性去掉),在控件内部加入如下代码(编辑器已经支持此属性了)
![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
发现问题:查看属性面板,再次修改CustomAddress子属性,然后运行,发现修改后无效果,而且显示的数据仍然是连字符属性的数据(非内镶属性的)
1.9 让控件支持内镶属性
解决方法:给Custom类添加元数据,如下代码
![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedBlockStart.gif)
![](https://www.cnblogs.com/Images/dot.gif)
编译后,再次测试发现属性显示的优先级发生了变化,在内镶属性存在的时候,显示内镶属性,若其中有子属性不存在,则显示连字符属性,大家可以适当更改内镶属性和连字符属性测试变化.
发现问题:在属性面板改变属性时,仍然无法使修改后的数据生效,且修改后,数据退回初始的数据,并且导致内镶属性消失
1.10 解决属性面板的问题
解决方法:给Custom类再添加一个元数据,如下代码
![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedBlockStart.gif)
![](https://www.cnblogs.com/Images/dot.gif)
编译后再次修改属性面板的值,发现修改的是内镶属性的数据,而且这次修改后数据没有丢失,运行后也是修改后的效果.
好了,简单的讲完了.
总结下:上面刚开始到1.3为止,其实效果已经实现了,接下来都是添加元数据,添加以后给我们带来的是方便.以上解决问题的办法全是套用元数据.可能上面的元数据大家很熟悉,在MSDN里面字面解释的也很清楚,但你去试验过吗?我相信这样的试验可以让你明白的更加深刻.
这次讲的虽然很简单(难得我把这么简单的东西变的这么复杂),主要是学习学习方法了
但我还是希望对大家有帮助,上面如果哪里讲错了还请指出来^_^.
示例代码下载(请大家多修改):
参考文章:
ASP.NET 2.0服务器控件开发之简单属性
ASP.NET 2.0服务器控件开发之复杂属性