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webservice结合dthml的简单例子(二,dhtml)

2024-08-26 00:15:33
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  客户端之所以使用dhtml,主要是为了实现remote,简单地说就是要达到无刷新的效果。

文件:study.htm

<!doctype html public "-//w3c//dtd html 4.0 transitional//en" >
<html>
    <head>
        <title></title>
        <meta name="generator" content="microsoft visual studio 7.0">
    </head>
    <script language="jscript">
     var otblmain ;                //主要的表格
     var strhtml = "" ;            //临时用全局变量
     var bsavestatus = true ;    //保存是否成功
     var icallid ;                //调用webservice的唯一号
     
      //通过webservice取得所有items
      //然后通过回调函数ongetitems格式化输出
      function getitems()
      {
        //调用webservice的getitems方法
        service.myservice.callservice(ongetitems , "getitems") ;
      }
      
      //webservice的回调函数
      function ongetitems(result)
      {
        if(result.error)
        {
            alert(result.errordetail.code + ":" + result.errordetail.string ) ;
            return ;
        }
        
        bbxml.loadxml(result.raw.xml);
        var sxml = bbxml.transformnode(bbxsl.xmldocument);
        if (bbxml.parseerror.reason == "")
        {
            strhtml = sxml;
        }
        else
        {
            strhtml = bbxml.parseerror.reason;
        }
    
      }
     
     //页面的初始化
     function onload()
     {
        //为使用webservice做准备
        service.useservice("study.asmx?wsdl" , "myservice") ;

        //定义纪录表格对象
        otblmain = document.getelementbyid("tblmain") ;
     }
     
     //添加一个新纪录
     //作用是给表格添加一个新行,并定义3个td的style , event
     function onadd()
     {
        var row = otblmain.insertrow() ;
        row.bgcolor = "#ffffff" ;
        var cellid = row.insertcell() ;
        cellid.innerhtml = otblmain.rows.length - 1 ;
        cellid.onclick = function(){onidclick(this);} ;
        cellid.style.cursor = "hand" ;
        cellid.title = "选定纪录" ;
        var cellitem = row.insertcell() ;
        cellitem.style.cursor = "crosshair" ;
        cellitem.onclick = function(){onitemclick(this);} ;
        var celldemo = row.insertcell() ;
        celldemo.style.cursor = "help" ;
        celldemo.onclick = function(){ondemoclick(this);} ;
     }
     
     //td item的点击事件
     //作用是弹出一个层,然后通过getitems方法取得所有的items
     //格式化后作为这个新层的innerhtml
     function onitemclick(cell)
     {
        getitems() ;

        var odiv = document.createelement("div") ;
        odiv.zindex = "1" ;
        odiv.style.position = "absolute";
        odiv.style.height = "200" ;
        odiv.style.width = "300" ;
        odiv.style.left = cell.style.left ;
        odiv.style.top = cell.style.top ;
        odiv.style.backgroundcolor = "#99eeff" ;
        odiv.style.border = '0.1cm groove blue' ;
        odiv.style.overflow = "auto" ;
        
        odiv.innerhtml = strhtml ;
        //document.body.appendchild(odiv);
        cell.appendchild(odiv) ;
     }
     
     //td item的选择事件
     function onitemselected(cell)
     {
        var otr = cell.parentelement ;
        var otable = otr.parentelement ;
        var otbody = otable.parentelement ;
        var odiv = otbody.parentelement ;
        odiv.style.display = "none" ;
        var ocell = odiv.parentelement ;
        ocell.removechild(odiv) ;
        ocell.innertext = cell.innertext ;
        
        odiv = null ;
        
     }
     
     //选定纪录
     function onidclick(cell)
     {
        var tr = cell.parentelement ;
        if(tr.bgcolor == "#99ccff")
        {
            tr.bgcolor = "#ffffff" ;
        }
        else
        {
            for(var i = 0 ; i < otblmain.rows.length ; i ++)
            {
                otblmain.rows[i].bgcolor = "#ffffff" ;
                otblmain.rows[i].cells[0].title = "选定纪录" ;
            }
            tr.bgcolor = "#99ccff" ;
            cell.title = "取消选定" ;
        }
     }
     
     //删除按钮的点击事件
     //删除用户选定的行,并重新给行编号
     function ondelete()
     {
        var i = getselectedindex() ;
        if( i == 0)
        {
            alert("没有选择要删除的纪录!") ;
            return false ;
        }
        else
        {
            otblmain.deleterow(i) ;
            for(var j = 1 ; j < otblmain.rows.length ; j ++)
            {
                otblmain.rows[j].cells[0].innertext = j ;
            }
        }
        
     }
     
     //取得用户选定那一行
     function getselectedindex()
     {
        for(var i = 0 ; i < otblmain.rows.length ; i ++)
        {
            if(otblmain.rows[i].bgcolor == "#99ccff")
            {
                return i ;
            }
        }
        return 0 ;
     }
     
     //表格中demo td的点击时间
     //作用是弹出模式化窗口,用户输入多个值
     function ondemoclick(cell)
     {
       //alert(cell.innertext) ;
       var odemo = window.showmodaldialog("demo.htm",cell.innertext , "dialogwidth:200px;dialogheight:200px;resizeable:no;status:no;scroll:no") ;  
       if(odemo != undefined)
       {
         cell.innertext = odemo.name + "-" + odemo.amount ;
        }
     }
     
     //保存按钮的点击方法
     //现在的做法是调用webservice依次保存每条纪录,
     //然后通过回调函数onsaverecords(result)将已保存的纪录清除
     function onsave()
     {
        if(otblmain.rows.length < 2)
        {
          alert("没有记录可保存!") ;
          return false ;
        }
        
        for(var i = 1 ; i < otblmain.rows.length  && bsavestatus ; i ++)
        {
            var stritemname ;
            var strdemoname  ;
            var intdemoamount ;

            stritemname = otblmain.rows[i].cells[1].innertext ;

            var arr = otblmain.rows[i].cells[2].innertext.split("-") ;
            if(arr.length != 2)
            {
                alert("每条纪录都要填") ;
                return false ;
            }
            else
            {
                strdemoname = arr[0] ;
                intdemoamount = arr[1] ;
                //alert(stritemname + "," + strdemoname + "," + intdemoamount) ;
                window.status = "" ;
                icallid = service.myservice.callservice(onsaverecords , "saverecord" , stritemname , strdemoname , parseint(intdemoamount , 10)) ;
                window.status = "正在保存第" + i + "条纪录……" ;
        }
            
            
        }
        
        
     }
     
     //保存纪录
     function onsaverecords(result)
     {
        if(result.error)
        {
            alert(result.errordetail.code + ":" + result.errordetail.string ) ;
            bsavestatus = false ;
            return ;
        }
        else
        {
           
            if(result.value)
            {
                window.status = window.status + "成功!" ;
                otblmain.deleterow(1) ;
            }
            else
            {
                bsavestatus = false ;
                alert("由于未知原因保存失败!") ;
                window.status = window.status + "失败!终止保存!" ;
            }
        }

     }
     
     
    </script>
    <body onload="onload();">
        <div id="service" style="behavior:url(webservice.htc)">
            <xml id="bbxml"></xml>
            <xml id="bbxsl" src="item1.xsl"></xml>
            <br>
            <h3 align="center">webservice示例</h3>
            <br>
            <br>
            <table width="600" align="center" id="tblmain" bgcolor="#000000" cellspacing="1">
                <tr bgcolor="#ffffff">
                    <td width="50">编号</td>
                    <td width="200">item</td>
                    <td>demo</td>
                </tr>
            </table>
            <p align="center">
                <input type="button" value="增加" onclick="onadd()">   <input type="button" value="删除" onclick="ondelete()">
                  <input type="button" value="保存" onclick="onsave()">
            </p>
    </body>
</html>

上面这个htm是通过微软的webservice.htc来对webservice进行soap访问,他封装得很好,我们要做的工作就是把传递回来的xml进行解析,我是用xsl进行解析的,下面是这个文件内容

文件 item1.xsl
<?xml version="1.0" encoding="utf-8"?>
<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/xsl/transform" xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/" xmlns:xsi="http://www.w3.org/2001/xmlschema-instance" xmlns:xsd="http://www.w3.org/2001/xmlschema">
    <xsl:output method="html"/>
    <xsl:template match="/">
        <xsl:apply-templates select="//soap:body"/>
    </xsl:template>
    <xsl:template match="soap:body">
        <xsl:apply-templates select="*[local-name() = 'getitemsresponse']/*[local-name() = 'getitemsresult']"/>
    </xsl:template>
    <xsl:template match="*[local-name() = 'getitemsresult']">
        <html>
            <body>
                <table border="1">
                    <tr>
                        <th>name</th>
                        <th>value</th>
                    </tr>
                    <xsl:for-each select="*[local-name() = 'anytype' and @xsi:type='item']">
                        <xsl:apply-templates select="."/>
                    </xsl:for-each>
                </table>
            </body>
        </html>
    </xsl:template>
    <xsl:template match="*[local-name() = 'anytype' and @xsi:type='item']">
        <tr>
            <td style="cursor:hand" onclick="onitemselected(this);">
                <xsl:text disable-output-escaping="yes">&nbsp;</xsl:text>
                <xsl:value-of select="*[local-name() = 'name']"/>
            </td>
            <td>
                <xsl:text disable-output-escaping="yes">&nbsp;</xsl:text>
                <xsl:value-of select="*[local-name() = 'value']"/>
            </td>
        </tr>
    </xsl:template>
</xsl:stylesheet>

上述例子很简单,主要难度在于那些dhtml。但如果你把它扩展一下,可以完成很多以前必须用activex才能实现的功能。
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