Code:

$('#dg').datagrid({
    onDblClickRow: function(index,row){
    var edType =$(this).datagrid('getEditor',{index:index,field:[font=Verdana]your field[/font]});    
    if([font=Verdana]your condition[/font]){
        $(edType.target).combobox('disable');
    }
})

I met the same problem.My solution is get the editor object in the ondbclickrow event of the datagrid and then bind the event function .

your example

var ed = $('#dataForm').datagrid('getEditor', {index:editIndex, field:'xxxId'});

the "ed" is null

<input type='text' value='1' />
<input type='text' value='2' />

方案1: 没问题
$("input").combobox({

}).combobox("setValues", ['1','2','3']);


方案2: 会报错
$("input").combobox({
   xxx
});

$("input").combobox("setValues", ['1','2','3']);

Firefox 提示: TypeError: $.data(...) is undefined

方案2里感觉 combobox 控件还没有初始化完毕, 这是为什么?

定义combobox 但实际还没有渲染 正确地应该在定义时的onloadsuccess事件中赋初值
例
$("input").combobox({
   onloadsuccess:function(){
          $(this).combobox('setValue', xxx)
        }
});

Thanks a lot for your answer!
Maybe I did indeed not describe my question clearly.
Let me describe my question again.

Code:

{"total":28,"group":[
	{"name":"ip1","address":"1.1.1.1","prefix":"32","len":"trusted"},
	{"name":"ip1","address":"1.1.1.2","prefix":"32","len":"trusted"},
	{"name":"ip1","address":"1.1.1.3","prefix":"32","len":"trusted"},
	{"name":"ip1","address":"1.1.1.4","prefix":"32","len":"black"},
	{"name":"ip2","address":"2.2.2.1","prefix":"32","len":"trusted"},
	{"name":"ip2","address":"2.2.2.2","prefix":"32","len":"black"},
	{"name":"ip2","address":"2.2.2.3","prefix":"32","len":"trusted"}
]}

I want to show datagrid like ip.jpg using this data format, if i use 'mergeCells datagird', the pagination  is incorrect.
What should I do?

in 'Merge Cells for DataGrid' demo ,  add 'pagination:true,'
<table class="easyui-datagrid" title="Merge Cells for DataGrid" style="width:700px;height:250px"
         data-options="
            rownumbers: true,
            singleSelect: true,
            iconCls: 'icon-save',
            pagination:true,
            url: 'datagrid_data1.json',
            method: 'get',
            onLoadSuccess: onLoadSuccess
         ">
I mean, how does using 'Product' column to pagination instend of rownumbers

when there is  "type='submit'"  in form , how to disable submitting the form on enter keypress for easyui-textbox.

In datagrid ,when we "merge cells" , how does pagination count the number of merged cells.