如何从服务器端填充jqGrid页脚中的userdata(How to populate userdata in jqGrid footer from server side)

我在jqGrid中显示数据，我需要在jqgrid的页脚中显示userdata。 我使用Servlet作为服务器端，我的数据类型是json。 手动我将数据格式化为JSON类型。

这是我的JSON数据格式：

{"page":"1",
"total":8,
"records":375,
"userdata":{'totalcdrcost':'302.92'},
"rows": [
{"id":"1","cell":[1,"2011-09-16","04:36:02","9035020090","00618956189189","00","13","00:01:09","ISD","9.6","Mumbai"]},
{"id":"2","cell":[2,"2011-09-16","04:35:14","9742796383","h","00","11","00:01:54","INCOMING","0","Mumbai"]},
 
 现在我想在页脚行显示这个用户数据为我启用的页脚行。这是我的页脚代码.. 
 
footerrow : true, userDataOnFooter : true
 
 但是jqGrid中没有显示数据......我不知道这是因为JSON数据格式不正确还是别的。 
 
 任何帮助将受到高度赞赏.. 
 
 提前致谢.. 
I am displaying data in jqGrid where i need to show the userdata in footer of jqgrid. I am using Servlet as server side and my datatype is json. Manually i am formatting data as JSON type.
 
Here is my JSON data format:
 
{"page":"1",
"total":8,
"records":375,
"userdata":{'totalcdrcost':'302.92'},
"rows": [
{"id":"1","cell":[1,"2011-09-16","04:36:02","9035020090","00618956189189","00","13","00:01:09","ISD","9.6","Mumbai"]},
{"id":"2","cell":[2,"2011-09-16","04:35:14","9742796383","h","00","11","00:01:54","INCOMING","0","Mumbai"]},
 
Now i want to show this userdata on footer row for that i enabled footer row also.here is my footer code..
 
footerrow : true, userDataOnFooter : true
 
But no data is displayed in the jqGrid... I don't know is this because JSON data format is not correct or something else.
 
Any help will be highly appreciated..
 
Thanks in advance..
                
最满意答案
                
                    
                        
 以下JSON响应部分不正确： 
 
"userdata":{'totalcdrcost':'302.92'}
 
 应该是这样的 
 
"userdata":{"totalcdrcost":"302.92"}
 
 要正确JSON。 如果要使用footerrow : true, userDataOnFooter : true选项，则userdata部分中的数据将显示在页脚中，网格中存在"totalcdrcost"列（如colModel name属性）。 
The following part of JSON response is incorrect:
 
"userdata":{'totalcdrcost':'302.92'}
 
It should be something like
 
"userdata":{"totalcdrcost":"302.92"}
 
to be correct JSON. If you want to use footerrow : true, userDataOnFooter : true options then the data from userdata part will be displayed in the footer it there are exist the column "totalcdrcost" in the grid (like name property in colModel).