ASP.NET控件开发系列之图片切换web控件

PicList.ascx

<%@ Control Language="C#" AutoEventWireup="true" CodeFile="PicList.ascx.cs" Inherits="WebParts_PicList" %>
<style type="text/css">
    /* Reset style */
    *
    {
        margin: 0;
        padding: 0;
        word-break: break-all;
    }
    body
    {
        background: #fff;
        color: #000000;
        font: 12px/1.6em Helvetica, Arial, sans-serif;
        margin-left: 0px;
        margin-top: 0px;
        margin-right: 0px;
        margin-bottom: 0px;
    }
    h1, h2, h3, h4, h5, h6
    {
        font-size: 1em;
    }
    a
    {
        color: #0287CA;
        text-decoration: none;
    }
    a:hover
    {
        text-decoration: underline;
    }
    ul, li
    {
        list-style: none;
    }
    fieldset, img
    {
        border: none;
    }
    legend
    {
        display: none;
    }
    em, strong, cite, th
    {
        font-style: normal;
        font-weight: normal;
    }
    input, textarea, select, button
    {
        font: 12px Helvetica, Arial, sans-serif;
    }
    table
    {
        border-collapse: collapse;
    }
    html
    {
        overflow: -moz-scrollbars-vertical;
    }
    /*Always show Firefox scrollbar*/
    /* iFocus style */
    #ifocus
    {
        width: 650px;
        height: 245px;
        margin: 0px;
        border: 1px solid #DEDEDE;
        background: #F8F8F8;
    }
    #ifocus_pic
    {
        display: inline;
        position: relative;
        float: left;
        width: 540px;
        height: 225px;
        overflow: hidden;
        margin: 10px 0 0 10px;
    }
    #ifocus_piclist
    {
        position: absolute;
    }
    #ifocus_piclist li
    {
        width: 550px;
        height: 225px;
        overflow: hidden;
    }
    #ifocus_piclist img
    {
        width: 550px;
        height: 225px;
    }
    #ifocus_btn
    {
        display: inline;
        float: right;
        width: 91px;
        margin: 9px 9px 0 0;
    }
    #ifocus_btn li
    {
        width: 91px;
        height: 57px;
        cursor: pointer;
        opacity: 0.5;
        -moz-opacity: 0.5;
        filter: alpha(opacity=50);
    }
    #ifocus_btn img
    {
        width: 75px;
        height: 45px;
        margin: 7px 0 0 11px;
    }
    #ifocus_btn .current
    {
        background: url(img/ifocus_btn_bg.gif) no-repeat;
        opacity: 1;
        -moz-opacity: 1;
        filter: alpha(opacity=100);
    }
    #ifocus_opdiv
    {
        position: absolute;
        left: 0;
        bottom: 0;
        width: 545px;
        height: 35px;
        background: #000;
        opacity: 0.5;
        -moz-opacity: 0.5;
        filter: alpha(opacity=50);
    }
    #ifocus_tx
    {
        position: absolute;
        left: 8px;
        bottom: 8px;
        color: #FFF;
    }
    #ifocus_tx .normal
    {
        display: none;
    }
</style>

<script type="text/javascript">
function $(id) { return document.getElementById(id); }
function addLoadEvent(func){
var oldonload = window.onload;
if (typeof window.onload != 'function') {
  window.onload = func;
} else {
  window.onload = function(){
   oldonload();
   func();
  }
}
}
function moveElement(elementID,final_x,final_y,interval) {
  if (!document.getElementById) return false;
  if (!document.getElementById(elementID)) return false;
  var elem = document.getElementById(elementID);
  if (elem.movement) {
    clearTimeout(elem.movement);
  }
  if (!elem.style.left) {
    elem.style.left = "0px";
  }
  if (!elem.style.top) {
    elem.style.top = "0px";
  }
  var xpos = parseInt(elem.style.left);
  var ypos = parseInt(elem.style.top);
  if (xpos == final_x && ypos == final_y) {
  return true;
  }
  if (xpos < final_x) {
    var dist = Math.ceil((final_x - xpos)/10);
    xpos = xpos + dist;
  }
  if (xpos > final_x) {
    var dist = Math.ceil((xpos - final_x)/10);
    xpos = xpos - dist;
  }
  if (ypos < final_y) {
    var dist = Math.ceil((final_y - ypos)/10);
    ypos = ypos + dist;
  }
  if (ypos > final_y) {
    var dist = Math.ceil((ypos - final_y)/10);
    ypos = ypos - dist;
  }
  elem.style.left = xpos + "px";
  elem.style.top = ypos + "px";
  var repeat = "moveElement('"+elementID+"',"+final_x+","+final_y+","+interval+")";
  elem.movement = setTimeout(repeat,interval);
}
function classNormal(iFocusBtnID,iFocusTxID){
var iFocusBtns= $(iFocusBtnID).getElementsByTagName('li');
var iFocusTxs = $(iFocusTxID).getElementsByTagName('li');
for(var i=0; i<iFocusBtns.length; i++) {
  iFocusBtns[i].className='normal';
  iFocusTxs[i].className='normal';
}
}
function classCurrent(iFocusBtnID,iFocusTxID,n){
var iFocusBtns= $(iFocusBtnID).getElementsByTagName('li');
var iFocusTxs = $(iFocusTxID).getElementsByTagName('li');
iFocusBtns[n].className='current';
iFocusTxs[n].className='current';
}
function iFocusChange() {
if(!$('ifocus')) return false;
$('ifocus').onmouseover = function(){atuokey = true};
$('ifocus').onmouseout = function(){atuokey = false};
var iFocusBtns = $('ifocus_btn').getElementsByTagName('li');
var listLength = iFocusBtns.length;
iFocusBtns[0].onmouseover = function() {
  moveElement('ifocus_piclist',0,0,5);
  classNormal('ifocus_btn','ifocus_tx');
  classCurrent('ifocus_btn','ifocus_tx',0);
}
if (listLength>=2) {
  iFocusBtns[1].onmouseover = function() {
   moveElement('ifocus_piclist',0,-225,5);
   classNormal('ifocus_btn','ifocus_tx');
   classCurrent('ifocus_btn','ifocus_tx',1);
  }
}
if (listLength>=3) {
  iFocusBtns[2].onmouseover = function() {
   moveElement('ifocus_piclist',0,-450,5);
   classNormal('ifocus_btn','ifocus_tx');
   classCurrent('ifocus_btn','ifocus_tx',2);
  }
}
if (listLength>=4) {
  iFocusBtns[3].onmouseover = function() {
   moveElement('ifocus_piclist',0,-675,5);
   classNormal('ifocus_btn','ifocus_tx');
   classCurrent('ifocus_btn','ifocus_tx',3);
  }
}
}
setInterval('autoiFocus()',3500);
var atuokey = false;
function autoiFocus() {
if(!$('ifocus')) return false;
if(atuokey) return false;
var focusBtnList = $('ifocus_btn').getElementsByTagName('li');
var listLength = focusBtnList.length;
for(var i=0; i<listLength; i++) {
  if (focusBtnList[i].className == 'current') var currentNum = i;
}
if (currentNum==0&&listLength!=1 ){
  moveElement('ifocus_piclist',0,-225,5);
  classNormal('ifocus_btn','ifocus_tx');
  classCurrent('ifocus_btn','ifocus_tx',1);
}
if (currentNum==1&&listLength!=2 ){
  moveElement('ifocus_piclist',0,-450,5);
  classNormal('ifocus_btn','ifocus_tx');
  classCurrent('ifocus_btn','ifocus_tx',2);
}
if (currentNum==2&&listLength!=3 ){
  moveElement('ifocus_piclist',0,-675,5);
  classNormal('ifocus_btn','ifocus_tx');
  classCurrent('ifocus_btn','ifocus_tx',3);
}
if (currentNum==3 ){
  moveElement('ifocus_piclist',0,0,5);
  classNormal('ifocus_btn','ifocus_tx');
  classCurrent('ifocus_btn','ifocus_tx',0);
}
if (currentNum==1&&listLength==2 ){
  moveElement('ifocus_piclist',0,0,5);
  classNormal('ifocus_btn','ifocus_tx');
  classCurrent('ifocus_btn','ifocus_tx',0);
}
if (currentNum==2&&listLength==3 ){
  moveElement('ifocus_piclist',0,0,5);
  classNormal('ifocus_btn','ifocus_tx');
  classCurrent('ifocus_btn','ifocus_tx',0);
}
}
addLoadEvent(iFocusChange);
</script>

<div align="center">
    <div id="ifocus">
        <div id="ifocus_pic">
            <div id="ifocus_piclist" style="left: 0; top: 0;">
                <ul runat="server" id="ulImgBig">
                </ul>
            </div>
            <div id="ifocus_opdiv">
            </div>
            <div id="ifocus_tx">
                <ul runat="server" id="urImgTitle">
                </ul>
            </div>
        </div>
        <div id="ifocus_btn">
            <ul runat="server" id="ulImgSmall">
            </ul>
        </div>
    </div>
</div>

public partial class WebParts_PicList : System.Web.UI.UserControl
{
    protected void Page_Load(object sender, EventArgs e)
    {
        ShowImages();
    }

    public void ShowImages()
    {
        for (int i = 0; i < ListImages.Count; i++)
        {
            //标题和小图
            if (i == 0)
            {
                urImgTitle.InnerHtml += "<li class='current'>" + listImages[i].ImageTitle1 + "</li>";
                ulImgSmall.InnerHtml += "<li class='current'><img src='" + listImages[i].ImageSrc1 + "' alt='" + listImages[i].ImageAlt1 + "' /></li>";
            }
            else
            {
                urImgTitle.InnerHtml += "<li class='normal'>" + listImages[i].ImageTitle1 + "</li>";
                ulImgSmall.InnerHtml += "<li class='normal'><img src='" + listImages[i].ImageSrc1 + "' alt='" + listImages[i].ImageAlt1 + "' /></li>";
            }
            //大图
            ulImgBig.InnerHtml += "    <li><a href=" + listImages[i].ImageHref1 + " target='_blank'><img src=" + listImages[i].ImageSrc1 + " alt=" + listImages[i].ImageAlt1 + " border='0' /></a></li>";

        }
    }

    private List<ShowImages> listImages;

    public List<ShowImages> ListImages
    {
        get { return listImages; }
        set { listImages = value; }
    }
}

//图片的属性
public class ShowImages
{
    string ImageSrc;
    string ImageHref;
    string ImageTitle;
    string ImageAlt;

    public string ImageAlt1
    {
        get { return ImageAlt; }
        set { ImageAlt = value; }
    }

    public string ImageSrc1
    {
        get { return ImageSrc; }
        set { ImageSrc = value; }
    }

    public string ImageHref1
    {
        get { return ImageHref; }
        set { ImageHref = value; }
    }

    public string ImageTitle1
    {
        get { return ImageTitle; }
        set { ImageTitle = value; }
    }

}

        List<ShowImages> listImages = new List<ShowImages>();
        ShowImages image1 = new ShowImages();
        image1.ImageAlt1 = "喵喵";
        image1.ImageHref1 = "http://qixuejia.cnblogs.com";
        image1.ImageSrc1 = "http://b23.photo.store.qq.com/http_imgload.cgi?/rurl4_b=e52b4cc5fe67c1a2dc328adb766f1633bfc02bb27fe17aa21ca1264a0dac599fc425faf65d1daac8ab7cb5923a15443882d9d0586694a0e5eb0671af60a2f6e739d3c15b1e52f2c518a00344fa791dbaee88cc43&a=25&b=23";
        image1.ImageTitle1 = "这是我的自画像";

listImages.Add(image1);
        listImages.Add(image2);
        listImages.Add(image3);
        listImages.Add(image4);

        PicList1.ListImages = listImages;

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