datagrid在MVC中的运用08-实现Master-Detail(使用子datagrid)

本文主要通过一个子datagrid来实现主次表。谢谢Kevin的博文。

代码部分与http://www.cnblogs.com/darrenji/p/3576258.html相似，这里只列出不一样的地方。

最终效果：

  ProductController  让子表Product返回json字符串

        public ActionResult GetJsonByCategory(int? categoryId = null)
        {
            if (!categoryId.HasValue)
            {
                return new EmptyResult();
            }

            var service = new Service();
            var products = service.LoadProductsByCategory((int)categoryId);

            //把Products集合对象实例序列化成json字符串
            string str = JsonSerializeHelper.SerializeToJson(products);
            return Content(str);
        }

  /Category/Index视图

@{
    ViewBag.Title = "Index";
    Layout = "~/Views/Shared/_Layout.cshtml";
}
<link href="~/Content/themes/default/easyui.css" rel="stylesheet" />
<link href="~/Content/themes/icon.css" rel="stylesheet" />

<table id="tt"></table>

@section scripts
{
    <script src="~/Scripts/jquery.easyui.min.js"></script>
    <script src="~/Scripts/datagrid-detailview.js"></script>
    <script src="~/Scripts/easyui-lang-zh_CN.js"></script>
    <script type="text/javascript">
        $(function() {
            initData();
        });

        function initData(params) {
            $('#tt').datagrid({
                url: '@Url.Action("GetData","Category")',
                 600,
                height: 400,
                title: 'Category列表',
                iconCls: 'icon-save',
                fitColumns: true,
                rownumbers: true, //是否加行号
                pagination: true, //是否显式分页
                pageSize: 15, //页容量，必须和pageList对应起来，否则会报错
                pageNumber: 2, //默认显示第几页
                pageList: [15, 30, 45],//分页中下拉选项的数值
                columns: [[
                    //book.ItemId, book.ProductId, book.ListPrice, book.UnitCost, book.Status, book.Attr1                   
                    { field: 'ID', title: '编号'},
                    { field: 'Name', title: '类别名称'},
                    { field: 'Description', title: '描述',  600 }
                ]],
                queryParams: params, //搜索json对象
                view: detailview,
                detailFormatter: function(index, row) {
                    return '<div id="ddv-' + index + '" style="padding:5px;"></div>';
                },
                onExpandRow: function(index, row) {
                    $('#ddv-' + index).datagrid({
                        url: '@Url.Action("GetJsonByCategory","Product", new {categoryId = "_id_"})'.replace("_id_", row.ID),
                        fitColumns: true,
                        singleSelect: true,
                        rownumbers: true,
                        loadMsg: '',
                        height: 'auto',
                        columns: [[
                            { field: 'CategoryID', title: '类别编号' },
                            { field: 'ProductID', title: '产品编号' },
                            { field: 'ProductName', title: '产品名称' },
                            { field: 'QuantityPerUnit', title: '单元数量' },
                            { field: 'UnitPrice', title: '价格' },
                            { field: 'UnitsInStock', title: '库存数量' },
                            { field: 'UnitOnOrder', title: '订购数量' }
                        ]],
                        onResize: function() {
                            $('#DataGrid').datagrid('fixDetailRowHeight', index);
                        },
                        onLoadSuccess: function() {
                            setTimeout(function() {
                                $('#DataGrid').datagrid('fixDetailRowHeight', index);
                            },0);
                        }
                    });
                    $('#DataGrid').datagrid('fixDetailRowHeight', index);
                }
            });
        }
    </script>
}