documentum中用js获取datagrid中的数据，js操作datagrid

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以下代码是js得到datagrid，且控制第一行被选中，并且得到选中行的第一列属性

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//得到datagrid对象，WorkflowInfor为当前component对应的类名，mygrid为datagrid的name属性值

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?var dg = wdk.dom.get('WorkflowInfor_mygrid_0').datagrid;

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//获取行数
???? var count = dg.getRowCount();
???? if(count>0){

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//选中第1行
??????dg.highlight(0,true);
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//获得当前选中行的第一列属性值，返回值为数组
???var workflowId = dg.data.getItemActionArgs(0, 'select');???
???if(id!=workflowId[0]){
????url = "<%=Form.makeUrl(request,"/component/workflow_view_component?objectId=")%>" + "<%=objectId%>&workflowId=" + workflowId[0];

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//其它操作
????changeFrameLocationInFrameset(parent, "workflow_view", url);
???}
???id = workflowId[0];
??}

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有时候我们需要当单击datagrid的某行的时候，触发js方法做一些操作

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<dmf:datagridRow name='attachcolumns' height='24'
????????cssclass='defaultDatagridRowAltStyle'
????????altclass="defaultDatagridRowStyle">
????????<dmf:datagridRowTd scope='row' valign="middle"
?????????cssclass='doclistfilenamedatagrid' width="250">
?????????<dmf:stringlengthformatter maxlen='16' wrapped='true'
??????????postfix='...'>
??????????<dmf:datagridRowEvent eventname="select"
???????????eventhandler="onViewAttachment" runatclient="true">
???????????<dmf:image datafield="icon" />
???????????<dmf:link onclick='onViewAttachment' name='objectLink'
????????????runatclient='true' datafield='workflow_name'>
????????????<dmf:argument name='objectId' datafield='workflow_id' />
???????????</dmf:link>
??????????</dmf:datagridRowEvent>
?????????</dmf:stringlengthformatter>
????????</dmf:datagridRowTd>
???????</dmf:datagridRow>

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function onViewAttachment(event){
???? var url="";
??if (event.count == 1) {
???//alert(event.startIndex+"??? "+event.type);
???var workflowId = event.datagrid.data.getItemActionArgs(event.startIndex, event.type);???
???if(id!=workflowId[0]){
????url = "<%=Form.makeUrl(request,"/component/workflow_view_component?objectId=")%>" + "<%=objectId%>&workflowId=" + workflowId[0];
????changeFrameLocationInFrameset(parent, "workflow_view", url);
???}
???id = workflowId[0];
??}
?}