backbase Read-time data refresh for listgrid

Read-time data refresh for listgrid.

刷新listgrid只需要調用其select-page方法就可以，實現實時刷新，可以在新線程中建立一個函數調用循環循環來調用b:listgrid的select-page方法。代碼如下：

xml 代碼

   <b:listgrid id="movies-listgrid" b:template="listgrid.xsl" style="height:280px;" b:url="listgrid-data.xml" b:page-number="1" b:page-size="20" b:items-in-total="1000">
      <s:event b:on="command">
         <s:task b:action="alert" b:value="{'The event comes from row: ', (count($_mouseElement/ancestor::tr/preceding-sibling::tr) + 1)}"
        b:test="$_mouseElement/name()='input'" />
      s:event>
      <b:listgridhead>
         <b:listgridrow>
            <b:listgridheadcell b:datatype="text">Titleb:listgridheadcell>
            <b:listgridheadcell b:datatype="text">Directorb:listgridheadcell>
            <b:listgridheadcell b:datatype="genre">Genreb:listgridheadcell>
            <b:listgridheadcell b:datatype="text">Languageb:listgridheadcell>
            <b:listgridheadcell b:datatype="datepicker" b:sorttype="string">Premiereb:listgridheadcell>
         b:listgridrow>
      b:listgridhead>
      <b:listgridbody />
   b:listgrid>
div>
<div>
    refresh every second
    <s:event b:on="command">
        >
        <s:task b:action="trigger" b:event="refresh-listgrid" b:async="true" />
    s:event>
    <s:event b:on="refresh-listgrid">

        <s:task b:action="trigger" b:event="select-page" b:target="id('movies-listgrid')"/>

        <s:task b:action="trigger" b:event="refresh-listgrid" b:delay="1000"/>
    s:event>
div>