有看到一网友在论坛上问问题,Insus.NET尝试了一下,下面提供Insus.NET所理解的基础之上的解决方案,仅供参考,原问题如下:
在解决之前,先准备一些数据吧。端午节快到了,公司分福利,希望你们公司也有。数据集是一个Hashtable:
private Hashtable GetData() { Hashtable ht = new Hashtable(); ht.Add(1, "粽子"); ht.Add(2, "苹果"); ht.Add(3, "雪梨"); ht.Add(4, "荔技"); ht.Add(5, "现金"); return ht; }
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在站点上创建一个网页,在.aspx页面上,写上下面代码:
到Insus.NET的博客上,下载两个给件,是专为ListControl绑定的,已经重构过了的:
http://www.cnblogs.com/insus/archive/2013/01/28/2880618.html
http://www.cnblogs.com/insus/archive/2009/12/13/1622884.html
解压之后,把DLL拉入BIN目录中。如:
然后,我们去.aspx.cs为页面的CheckBoxList,DropDownList,RadioButtonList控件绑定数据源。
接下来,我们想在文本框填入一些值,这个值能够指向那些控件中选项的值,如果没有对应的值,控件将是回归至默认(缺省值)的状态。由于每个控件是不同的对象,为了能让它们能够互动,有一致的动作,Insus.NET写一个接口:
下面,要看你需要什么控件来互动了,也就是什么控件来接收文本框的值了。需要的控件,均接中写一个适配器(Adapter),由于Insus.NET仅列举了三个,因此分别写三个适配器。
using System;using System.Collections.Generic;using System.Linq;using System.Web;using System.Web.UI.WebControls;/// <summary>/// Summary description for InsusCheckBoxList/// </summary>namespace Insus.NET{ public class InsusCheckBoxList: InsusAdapter { CheckBoxList _CheckBoxList; public InsusCheckBoxList() { // // TODO: Add constructor logic here // } public void SetValue(WebControl wc, object value) { if (wc is CheckBoxList) { _CheckBoxList = (CheckBoxList)wc; foreach (ListItem li in this._CheckBoxList.Items) { li.Selected = li.Text == value.ToString() ? true : false; } } } }}
InsusCheckBoxList
using System;using System.Collections.Generic;using System.Linq;using System.Web;using System.Web.UI.WebControls;/// <summary>/// Summary description for InsusDropDownList/// </summary>namespace Insus.NET{ public class InsusDropDownList: InsusAdapter { DropDownList _DropDownList; public InsusDropDownList() { // // TODO: Add constructor logic here // } public void SetValue(WebControl wc, object value) { if (wc is DropDownList) { _DropDownList = (DropDownList)wc; this._DropDownList.ClearSelection(); foreach (ListItem li in this._DropDownList.Items) { if (li.Text == value.ToString ()) this._DropDownList.Items.FindByText(value.ToString()).Selected = true; } } } }}
InsusDropDownList
using System;using System.Collections.Generic;using System.Linq;using System.Web;using System.Web.UI.WebControls;/// <summary>/// Summary description for InsusRadioButtonList/// </summary>namespace Insus.NET{ public class InsusRadioButtonList: InsusAdapter { RadioButtonList _RadioButtonList; public InsusRadioButtonList() { // // TODO: Add constructor logic here // } public void SetValue(WebControl wc, object value) { if (wc is RadioButtonList) { _RadioButtonList = (RadioButtonList)wc; foreach (ListItem li in this._RadioButtonList.Items) { li.Selected = li.Text == value.ToString() ? true : false; } } } }}
InsusRadioButtonList
如果还有基它,继续写出来......
下面就是Button按钮的Click事件:
好了,还是看看最终的效果吧:
以下内容,于2013-06-11 09:00添加:
早上来看到第一次所想的,有些地方,觉得设计不好。按照面向对象的设计理念来说,接口设计的藕合性过高,接口内方法SetValue需要带两个参数。理想的带一个参数为好。
因此,Insus.NET把接口改为:
using System;using System.Collections.Generic;using System.Linq;using System.Web;using System.Web.UI.WebControls;/// <summary>/// Summary description for InsusAdapter/// </summary>namespace Insus.NET{ public interface InsusAdapter { void SetValue(object value); }}
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这样一改的话,那怎样知道是给那个一个控制赋值? 解决这个问题,我们可以使用构造函数来处理。回到上面的那三个适配器InsusCheckBoxList,InsusDropDownList,InsusRadioButtonList,下面是重构好之后的适配器:
using System.Collections.Generic;using System.Linq;using System.Web;using System.Web.UI.WebControls;/// <summary>/// Summary description for InsusCheckBoxList/// </summary>namespace Insus.NET{ public class InsusCheckBoxList : InsusAdapter { CheckBoxList _CheckBoxList; public InsusCheckBoxList(CheckBoxList checkBoxList) { this._CheckBoxList = checkBoxList; } public void SetValue(object value) { foreach (ListItem li in this._CheckBoxList.Items) { li.Selected = li.Text == value.ToString() ? true : false; } } }}
InsusCheckBoxList
using System;using System.Collections.Generic;using System.Linq;using System.Web;using System.Web.UI.WebControls;/// <summary>/// Summary description for InsusDropDownList/// </summary>namespace Insus.NET{ public class InsusDropDownList : InsusAdapter { DropDownList _DropDownList; public InsusDropDownList(DropDownList dropDownList) { this._DropDownList = dropDownList; } public void SetValue(object value) { this._DropDownList.ClearSelection(); foreach (ListItem li in this._DropDownList.Items) { if (li.Text == value.ToString()) this._DropDownList.Items.FindByText(value.ToString()).Selected = true; } } }}
InsusDropDownList
using System;using System.Collections.Generic;using System.Linq;using System.Web;using System.Web.UI.WebControls;/// <summary>/// Summary description for InsusRadioButtonList/// </summary>namespace Insus.NET{ public class InsusRadioButtonList : InsusAdapter { RadioButtonList _RadioButtonList; public InsusRadioButtonList(RadioButtonList radioButtonList) { this._RadioButtonList = radioButtonList; } public void SetValue(object value) { foreach (ListItem li in this._RadioButtonList.Items) { li.Selected = li.Text == value.ToString() ? true : false; } } }}
InsusRadioButtonList
重构之后,控件就可以在适配器new实例化时,就传入去了。
可以参考下面重构全过程:
以下内容,于2013-06-11 10:20添加:
此部分内容,只是重构一下comments的语句,因为每个控件的适配器有实作接口,所以使用多态来重构它们。