RoundedCorners锐化边角控件

功能：
    专门用来锐化控件的边角。RoundedCorners控件和DropShadow控件的锐化效果一样，缺点是没有阴影效果，优点是可以只锐化4个边角中的任意一个或多个。
属性：
     TargetControlID：被锐化的控件ID。
     Radius：锐化幅度。
     Corners：要锐化的边角，All表示所有边角。
代码实例：

< html  xmlns ="http://www.w3.org/1999/xhtml" >
< head  runat ="server" >
     < title > RoundedCorners 控件 </ title >
< style  type ="text/css" >

    .roundedPanel
   {}{    
        width:300px;

        background-color:#B347A9;   

        color:blue;

        font-weight:bold;        
    }
</ style >
</ head >
< body >
     < form  id ="form1"  runat ="server" >
     < asp:ScriptManager  ID ="ScriptManager1"  runat ="server" >
     </ asp:ScriptManager >
     < asp:Panel  ID ="Panel1"  runat ="server"   CssClass ="roundedPanel" >
      < div  style ="padding:10px;text-align:center" >

         < div  style ="padding:5px; border:solid black thin;background-color:#B4B4B4;" >

         < asp:Image  ID ="Image1"  ImageUrl ="~/Images/AJAX.gif"  runat ="server"    />   
         </ div >
         </ div >
     </ asp:Panel >
     < ajaxToolkit:RoundedCornersExtender  ID ="RoundedCornersExtender1"  runat ="server"  BehaviorID ="RoundedCornersBehavior1"  TargetControlID ="Panel1"  Color ="#ff8800"    >

</ ajaxToolkit:RoundedCornersExtender >
  < input  type ="radio"  id ="radius0"  name ="radiusValues"  value ="0"
                onclick ="$find('RoundedCornersBehavior1').set_Radius(this.value);"   />
             < label  for ="radius0" > None </ label >
            
             < input  type ="radio"  id ="radius2"  name ="radiusValues"  value ="2"
                onclick ="$find('RoundedCornersBehavior1').set_Radius(this.value);"   />
             < label  for ="radius2" > 2px </ label >
            
             < input  type ="radio"  id ="radius4"  name ="radiusValues"  value ="4"
                onclick ="$find('RoundedCornersBehavior1').set_Radius(this.value);"   />
             < label  for ="radius4" > 4px </ label >
            
             < input  type ="radio"  id ="radius6"  name ="radiusValues"  value ="6"
                onclick ="$find('RoundedCornersBehavior1').set_Radius(this.value);"  checked ="checked"   />
             < label  for ="radius6" > 6px </ label >
            
             < input  type ="radio"  id ="radius10"  name ="radiusValues"  value ="10"
                onclick ="$find('RoundedCornersBehavior1').set_Radius(this.value);"   />

< br  />
选择某个边角  &nbsp;

   < input  type ="checkbox"  id ="corner1"  name ="cornerValues"  value ="1"
                onclick ="$find('RoundedCornersBehavior1').setCorner(this.value, this.checked);"  checked ="checked"   />
             < label  for ="corner1" > Top Left </ label >
            
             < input  type ="checkbox"  id ="corner2"  name ="cornerValues"  value ="2"
                onclick ="$find('RoundedCornersBehavior1').setCorner(this.value, this.checked);"  checked ="checked"   />
             < label  for ="corner2" > Top Right </ label >
            
             < input  type ="checkbox"  id ="corner8"  name ="cornerValues"  value ="8"
                onclick ="$find('RoundedCornersBehavior1').setCorner(this.value, this.checked);"  checked ="checked"   />
             < label  for ="corner8"   > Bottom Left </ label >
            
             < input  type ="checkbox"  id ="corner4"  name ="cornerValues"  value ="4"
                onclick ="$find('RoundedCornersBehavior1').setCorner(this.value, this.checked);"  checked ="checked"   />
             < label  for ="corner4" > Bottom Right </ label >

     </ form >
</ body >
</ html >

运行结果：