搞.net开发一年半了,碰到一个很棘手的问题(RadioButtonList被选择后怎么取消选择?)
我有一个radiobuttonlist 
  <asp:RadioButtonList   ID= "rblist "   Runat= "server "   RepeatDirection= "Horizontal ">  
 				 <asp:ListItem   Value= "1 "> Translator </asp:ListItem>  
 				 <asp:ListItem   Value= "2 "> Done </asp:ListItem>  
 			 </asp:RadioButtonList>    
 我的问题是:一旦选中了某项,然后再单击就可以取消(使两项都不选),能否用JAVASCRIPT做到?望高手赐教。。。。。。
------解决方案--------------------如果是静态页面可以的了 
 =========================================== 
 回复人:saeba(浮躁是失败的最初原因) ( ) 信誉:100	2007-01-04 21:19:43	得分:0 
 	radiobuttonlist 我不怎么用,不过我想javascript 可以实现   
 var obj = document.getElementById( "rblist "); 
 obj.option[0].checked = false;   
 没试,大概就是这样的 
 ============================================== 
 如果是aspx页面应为服务器控件都有ViewState的值,javascript可以改变html控件的值,但是改变不了视图的值了。javascript看似取消了,其实是一个假象了。
------解决方案-------------------- <asp:RadioButtonList ID= "RadioButtonList1 " runat= "server ">  
              <asp:ListItem onclick= "set(this); "> a </asp:ListItem>  
              <asp:ListItem onclick= "set(this); "> b </asp:ListItem>  
          </asp:RadioButtonList>  </div>    
      <script>  
         var id =  " "; 
         function set(c) 
         {                
             if(c.id == id)   
             {             
                 c.checked = false; 
                 id =  " "; 
             } 
             else 
                 id = c.id; 
         } 
      </script>
------解决方案--------------------我试了一下可以cancel,不过觉得意义不大啊 
 		 <form id= "Form1 " method= "post " runat= "server ">  
 			 <asp:RadioButtonList id= "radioBtnList " style= "Z-INDEX: 101; LEFT: 232px; POSITION: absolute; TOP: 136px " 
 				runat= "server ">  
 				 <asp:ListItem Value= "111 "> 111 </asp:ListItem>  
 				 <asp:ListItem Value= "2222 "> 2222 </asp:ListItem>  
 				 <asp:ListItem Value= "3333 "> 3333 </asp:ListItem>  
 			 </asp:RadioButtonList>  
 			 <asp:Button id= "btnCancel " style= "Z-INDEX: 102; LEFT: 408px; POSITION: absolute; TOP: 168px " 
 				runat= "server " Text= "取消 ">  </asp:Button>  
 		 </form>  
 		private void btnCancel_Click(object sender, System.EventArgs e) 
 		{ 
 			bool bFlag = false; 
 			this.radioBtnList.SelectedItem.Selected = bFlag; 
 		}
------解决方案--------------------Sorry,下班回家晚了点,测试通过: 
 前台: 
  <%@ Page Language= "C# " AutoEventWireup= "true " CodeFile= "Default.aspx.cs " Inherits= "_Default " %>  
  <!DOCTYPE html PUBLIC  "-//W3C//DTD XHTML 1.0 Transitional//EN "  "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd ">  
  <html xmlns= "http://www.w3.org/1999/xhtml " >  
  <head runat= "server ">  
      <title> 无标题页 </title>  
 	 <script language= "javascript ">  
 	 <!-- 
 	var a = new Array();  	 
 	function myClick(e) 
 	{ 
 		for(var h=0;h <document.all.length;h++) 
 		{ 
 			if(document.all(h).tagName ==  "INPUT " && document.all(h).type ==  "radio ") 
 			{ 
 				if(document.all(h).id == e.id)