RadioButtonList也是数据绑定控件，但是表现的形式远不及repeater，datagrid，datalist这些数据控件多。原因很简单他是radiobutton的列表么。；）但是在实际的工作中往往也需要来点花哨的如下图
今天超子简单写了一个实现上图效果的自定义radiobuttonlist控件，把代码贴出来，大家讨论讨论。
为了方便贴在网上，超子把用到的两个类写在一个文件里了。另外，横向布局的代码我没写，只写了纵向的。
using
System;
using
System.Web;
using
System.Web.UI;
using
System.Web.UI.WebControls;
using
System.Globalization;
namespace
Foto
{
//->************************************** //-> CustomRadioButtonList Simple Sample * //-> * //-> by Chaozi * //-> 04/11/16 * //->************************************** public class MyRadioButtonList:RadioButtonList
{ — 成员变量 —#region — 成员变量 — private string alternatingItemCssClass; private string itemCssClass;
#endregion — 构造 —#region — 构造 — public MyRadioButtonList() { } #endregion — 属性 —#region — 属性 — public string AlternatingItemCssClass { get{ return alternatingItemCssClass; } set{ alternatingItemCssClass = value;} } public string ItemCssClass { get{ return itemCssClass; } set{ itemCssClass = value;} } #endregion — 重写呈现方法 —#region — 重写呈现方法 — protected override void Render(HtmlTextWriter writer) { MyRepeatInfo info = new MyRepeatInfo(); Style cStyle = (ControlStyleCreated ? ControlStyle : null); info.RepeatColumns = RepeatColumns; info.RenderRepeater(writer,this,cStyle,this,itemCssClass,alternatingItemCssClass); } #endregion } public class MyRepeatInfo { — 成员变量 —#region — 成员变量 — int repeatColumns = 0; RepeatDirection direction = RepeatDirection.Vertical; #endregion — 构造 —#region — 构造 — public MyRepeatInfo() { } #endregion — 属性 —#region — 属性 — public int RepeatColumns { get{ return repeatColumns; } set{ repeatColumns = value;} } public RepeatDirection Direction { get{ return direction; } set{ direction = value;} } #endregion — 方法 —#region — 方法 — public void RenderRepeater(HtmlTextWriter writer,IRepeatInfoUser user,Style controlStyle,WebControl baseControl) { RenderRepeater(writer,user,controlStyle,baseControl,null,null); } public void RenderRepeater(HtmlTextWriter writer,IRepeatInfoUser user,Style controlStyle,WebControl baseControl,string alternatingItemCssClass) { RenderRepeater(writer,user,controlStyle,baseControl,null,alternatingItemCssClass); } public void RenderRepeater(HtmlTextWriter writer,IRepeatInfoUser user,Style controlStyle,WebControl baseControl,string itemCssClass,string alternatingItemCssClass) { switch (direction) { case RepeatDirection.Horizontal: RenderHorizontal(writer,user,controlStyle,baseControl,itemCssClass,alternatingItemCssClass); break; case RepeatDirection.Vertical: RenderVertical(writer,user,controlStyle,baseControl,itemCssClass,alternatingItemCssClass); break; } } #endregion — 辅助方法 —#region — 辅助方法 — void RenderHorizontal(HtmlTextWriter writer,IRepeatInfoUser user,Style controlStyle,WebControl baseControl,string itemCssClass,string alternatingItemCssClass) { //水平 } //-> void RenderVertical(HtmlTextWriter writer,IRepeatInfoUser user,Style controlStyle,WebControl baseControl,string itemCssClass,string alternatingItemCssClass) { //垂直– int total = user.RepeatedItemCount; int colsCount = repeatColumns; if(colsCount == 0) colsCount = 1; WebControl ctrl = new Table(); ctrl.ID = baseControl.ClientID; ctrl.CopyBaseAttributes(baseControl); ctrl.ApplyStyle(controlStyle); string itemCss; ctrl.RenderBeginTag(writer); for ( int index = 0; index < total ; index ++) { if(index % colsCount == 0) { if((index / colsCount) % 2 == 0) itemCss = itemCssClass; else itemCss = alternatingItemCssClass; writer.AddAttribute(HtmlTextWriterAttribute.Class,itemCss); writer.RenderBeginTag(HtmlTextWriterTag.Tr); } writer.RenderBeginTag(HtmlTextWriterTag.Td); RepeatInfo info = new RepeatInfo(); info.RepeatColumns = repeatColumns; user.RenderItem(ListItemType.Item,index,info,writer); writer.RenderEndTag(); if(((index+1) % colsCount == 0) || (index+1 == total)) writer.RenderEndTag(); } ctrl.RenderEndTag(writer); } #endregion }
}
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