图片切换显示

效果如图：

点击右下角的数字可以让图片切换显示；

这个做起来不难，其实可以说是Flash编程了，首先要有一个Flash(.swf)文件。

下面是cs中的代码：

前台有一个服务器端控件Label；

下面的代码中红色部分是根据需要可以改动的；

 

private void CreateHtml()
        {
            string pics, links, texts;

            pics = links = texts = "";

            string quotes = @"""";   //返回一个"符号
            sql = "select top 4 title,filename from Source_MySource where userid='"+userid.ToString()+"' and reverse(left(reverse(filename),charindex('.',reverse(filename))-1))='gif' or reverse(left(reverse(filename),charindex('.',reverse(filename))-1))='jpg' order by sdate desc";

                DataTable dt = DataAccess.GetDataTable(sql);

                string[] imgUrl = new string[dt.Rows.Count];
                string[] imgtext = new string[dt.Rows.Count];
                string[] imgLink = new string[dt.Rows.Count];

                if (dt.Rows.Count == 0)
                {
                    Label1.Text = "";

                    return;
                }

                //开始字符串
                string str = "<script type='text/javascript' language='javascript'>";

                for (int i = 0; i < dt.Rows.Count; i++)
                {
                    imgUrl[i] = PubMethod.GetPath("35") + dt.Rows[i]["filename"].ToString();
                    str = str + "imgUrl" + i.ToString() + "='" + imgUrl[i].ToString() + "';";

                    imgtext[i] = dt.Rows[i]["title"].ToString();
                    str = str + "imgtext" + i.ToString() + "='" + imgtext[i].ToString() + "';";

                    imgLink[i] = "";
                    str = str + "imgLink" + i.ToString() + "='" + imgLink[i].ToString() + "';";

                    pics = pics + "+'|'+" + "imgUrl" + i.ToString();
                    links = links + "+'|'+" + "imgLink" + i.ToString();
                    texts = texts + "+'|'+" + "imgtext" + i.ToString();
                }

                str = str + "var focus_width=295;";
                str = str + "var focus_height=230;";
                str = str + "var text_height=20;";
                str = str + "var swf_height = focus_height+text_height;";

                int pos = 0;

                pos = pics.IndexOf("+'|'+");

                pics = pics.Substring(pos + 5);

                links = links.Substring(pos + 5);

                texts = texts.Substring(pos + 5);

                str = str + "var pics=" + pics + ";";
                str = str + "var links=" + links + ";";
                str = str + "var texts=" + texts + ";";

                str = str + "document.write('<object classid=" + quotes + "clsid:d27cdb6e-ae6d-11cf-96b8-444553540000" + quotes + " codebase=" + quotes + "http://fpdownload.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=6,0,0,0" + quotes + " width=" + quotes + "'+ focus_width +'" + quotes + " height=" + quotes + "'+ swf_height +'" + quotes + ">');";

                str = str + "document.write('<param name=" + quotes + "allowScriptAccess" + quotes + " value=" + quotes + "sameDomain" + quotes + "><param name=" + quotes + "movie" + quotes + " value=" + quotes + "../focus.swf" + quotes + "><param name=" + quotes + "quality" + quotes + " value=" + quotes + "high" + quotes + "><param name=" + quotes + "bgcolor" + quotes + " value=" + quotes + "#F0F0F0" + quotes + ">');";

                str = str + "document.write('<param name=" + quotes + "menu" + quotes + " value=" + quotes + "false" + quotes + "><param name=wmode value=" + quotes + "opaque" + quotes + ">');";

                str = str + "document.write('<param name=" + quotes + "FlashVars" + quotes + " value=" + quotes + "pics='+pics+'&links='+links+'&texts='+texts+'&borderwidth='+focus_width+'&borderheight='+focus_height+'&textheight='+text_height+'" + quotes + ">');";

                str = str + "document.write('<embed src=" + quotes + "focus.swf" + quotes + " wmode=" + quotes + "opaque" + quotes + " FlashVars=" + quotes + "pics='+pics+'&links='+links+'&texts='+texts+'&borderwidth='+focus_width+'&borderheight='+focus_height+'&textheight='+text_height+'" + quotes + " menu=" + quotes + "false" + quotes + " bgcolor=" + quotes + "#F0F0F0" + quotes + " quality=" + quotes + "high" + quotes + " width=" + quotes + "'+ focus_width +'" + quotes + " height=" + quotes + "'+ focus_height +'" + quotes + " allowScriptAccess=" + quotes + "sameDomain" + quotes + " type=" + quotes + "application/x-shockwave-flash" + quotes + " pluginspage=" + quotes + "http://www.macromedia.com/go/getflashplayer" + quotes + " />');";

                str = str + "document.write('</object>');";

                str = str + "</script>";

                Label1.Text = str;
        }

 

我是把这个做成了一个控件，不过有一个问题始终没有弄明白：所使用的页面必须是控件路径的上一级，否则控件始终处于加载中，无法完成，很是怪异；