Kendo UI Grid multi level hierarchy (n-levels of hierarchy)

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I am using the Kendo UI Grid and currently display parent child records appropriately. However, it turns out that i will actually need to display n-levels vs. strictly pare

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隐瞒了意图╮

2020-11-29 13:05

Not sure if this question is still open, but a simple solution is to use recursion in the "DetailInit" function, like below:

<!DOCTYPE html>
<html>
<head>
    <base href="https://demos.telerik.com/kendo-ui/grid/hierarchy">
    <style>html { font-size: 14px; font-family: Arial, Helvetica, sans-serif; }</style>
    <title></title>
    <link rel="stylesheet" href="https://kendo.cdn.telerik.com/2018.1.117/styles/kendo.common-material.min.css" />
    <link rel="stylesheet" href="https://kendo.cdn.telerik.com/2018.1.117/styles/kendo.material.min.css" />
    <link rel="stylesheet" href="https://kendo.cdn.telerik.com/2018.1.117/styles/kendo.material.mobile.min.css" />

    <script src="https://kendo.cdn.telerik.com/2018.1.117/js/jquery.min.js"></script>
    <script src="https://kendo.cdn.telerik.com/2018.1.117/js/kendo.all.min.js"></script>
    

</head>
<body>

        <div id="example">
            <div id="grid"></div>          
            <script>

var myData = [{ item: 0, title:"Meat" , items:[
                { item: 0.1, title:"Beef"},
                { item: 0.2, title:"Chicken"},
              ]}, 
              { item: 1, title:"Vegetables", items:[
                { item: 1.0, title:"Carrot"},
                { item: 1.1, title:"Pies", items:[
                  { item: 1.11, title:"Pie1"},
                  { item: 1.12, title:"Pie2"},
                  { item: 1.13, title:"Pie3"}
                 ]},
              ]}
             ];
              
                $(document).ready(function() {
                    var element = $("#grid").kendoGrid({
                        dataSource: {
                            data: myData
                        },
                        height: 600,
                        sortable: true,
                        pageable: true,
                        detailInit: detailInit1,
                        dataBound: function() {
                            this.expandRow(this.tbody.find("tr.k-master-row").last());
                        },
                        columns: [
                            {
                                field: "item",
                                title: "ID",
                                width: "110px"
                            },
                            {
                                field: "title",
                                title: "Food",
                                width: "110px"
                            }
                        ]
                    });
                });

                function detailInit1(e) {                  
                    $("<div/>").appendTo(e.detailCell).kendoGrid({
                        dataSource: {
                            data: e.data.items  //data is the current position item, items is its child items
                        },
                        scrollable: false,
                        sortable: true,
                        pageable: true,   
                        detailInit: detailInit1,
                        dataBound: function() {
                            this.expandRow(this.tbody.find("tr.k-master-row").last());
                        },
                        columns: [
                            {
                                field: "item",
                                title: "ID",
                                width: "110px"
                            },
                            {
                                field: "title",
                                title: "Food",
                                width: "110px"
                            }
                        ]
                    });
                }
              
            </script>
        </div>


</body>
</html>

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臣服心动

2020-11-29 13:20

It took a while, but I finally worked out an answer with some guidance from the peeps at Telerik. I was just having the hardest time getting my head around the solution.

Vladimir (at Telerik) suggested that I use a custom ajax call in the detailInit function using a function on success to determine if I had child data to consider. Since I needed the detail grid no matter what, I moved the child check into another function that creates the detail grid. If I find child data, I add a detailInit parameter to the new grid. If not, I simply render the new detail grid.

The ajax initDetail function:

function detailInit(e) {
            var eventData = e;
            $.ajax({
                url: apiUrl + "ProcessJobs",
                type: "POST",
                data: {BoxId: e.data.JobId, AppId: e.data.AppId}, 
                dataType: "json",
                success: function(data, status, xhr) {
                    initializeDetailGrid(eventData, data);
                }
            }

The function to build the new detail grid with the check for children:

function initializeDetailGrid(e, result) {
            var moreChildren = result[0].HasChildren;
            var gridBaseOptions = {
                dataSource: result,
                scrollable: false,
                sortable: true,
                columns: [
                    {
                        field: "ParentJobId",
                        title: "Parent Job"
                    },
                    {
                        field: "JobId",
                        title: "Job Id"
                    },
                    {
                        field: "JobName",
                        title: "Job Name",
                    },
                    {
                        field: "JobStatus",
                        title: "Status"
                    },
                    {
                        field: "JobStatusId",
                        title: "Status Code"
                    },
                    {
                        field: "HasChildren",
                        title: "Has Children"
                    },
                    {
                        field: "ChildrenCount",
                        title: "Child Jobs"
                    }
                ]
            };

            var gridOptions = {};
            if (moreChildren) {
                gridOptions = $.extend({}, gridBaseOptions, { detailInit: detailInit });
            } else {
                gridOptions = gridBaseOptions;
            };
            $("<div/>").appendTo(e.detailCell).kendoGrid(gridOptions);
        };

For completeness, here is the full page and example data from the sample project. It is a .Net MVC4 based website, using Web API services for data and Kendo UI for the client.

Here is the page code:

@{
    ViewBag.Title = "n-level Grid";
}

<script type="text/javascript">
    $(document).ready(function () {
        var isParent, appId, lobId, boxId;
        var apiUrl = '@ViewBag.ApiUrl';

        var lobDataSource = new kendo.data.DataSource({
            transport: {
                read: {
                    url: apiUrl + "Lob"
                }
            },
            schema: {
                model: {
                    id: "LobId",
                    hasChildren: "HasChildren"
                }
            }
        });

        var appsDataSource = new kendo.data.DataSource({
            transport: {
                read: {
                    url: apiUrl + "App"
                },
                parameterMap: function (data, action) {
                    if (action === "read") {
                        data.lobid = lobId;
                        data.parent = isParent;
                        return data;
                    } else {
                        return data;
                    }
                }
            }
        });

        var filterDataSource = new kendo.data.DataSource({
            transport: {
                read: {
                    url: apiUrl + "Theme"
                }
            },
            schema: {
                model: { id: "FilterId" }
            }
        });

        var boxesDataSource = new kendo.data.DataSource({
            transport: {
                read: {
                    url: apiUrl + "Process"
                },
                parameterMap: function (data) {
                    data.appid = appId;
                    data.parent = isParent;
                    data.lobid = lobId;
                    return kendo.stringify(data);
                }
            },
            schema: {
                data: "Data",
                total: "Total",
                model: { id: "JobId" }
            },
            serverPaging: true,
            serverFiltering: true,
            serverSorting: true
        });

        var lobnav = $("#lobnav").kendoTreeView({
            select: function (e) {
                var tree = this;
                var src = tree.dataItem(e.node);
                lobId = src.LobId;
                isParent = src.HasChildren;
            },
            change: function (e) {
                appsDataSource.read();
            },
            dataSource: {
                transport: {
                    read: {
                        url: apiUrl + "Lob"
                    }
                },
                schema: {
                    model: {
                        id: "LobId",
                        hasChildren: "HasChildren"
                    }
                }
            },
            loadOnDemand: false,
            dataTextField: "LobName"
        });

        var appnav = $("#lobapp").kendoListView({
            selectable: "single",
            autoBind: false,
            change: function () {
                var idx = this.select().index();
                var itm = this.dataSource.view()[idx];
                appId = itm.AppId;
                boxesDataSource.query({
                    page: 1,
                    pageSize: 10
                });
            },
            template: "<div class='pointercursor'>${AppName}</div>",
            dataSource: appsDataSource
        });

        var jobsfilter = $("#jobfilter").kendoListView({
            selectable: "single",
            loadOnDemand: false,
            template: "<div class='pointercursor' id=${FilterId}>${FilterName}</div>",
            dataSource: filterDataSource,
            dataBound: function () {
                var dsource = $("#jobfilter").data("kendoListView").dataSource;
                if (dsource.at(0).FilterName !== "All") {
                    dsource.insert(0, { FilterId: 0, FilterName: "All" });
                }
            },
            change: function () {
                var itm = this.select().index(), dataItem = this.dataSource.view()[itm];
                var appDs = appsDataSource.view(), apps = $("#lobapp").data("kendoListView"),
                    selected = $.map(apps.select(), function (item) {
                        return appDs[$(item).index()].AppName;
                    });
                if (selected.length > 0) {
                    if (dataItem.FilterId !== 0) {
                        var $filter = new Array();
                        $filter.push({ field: "JobStatusId", operator: "eq", value: dataItem.FilterId });
                        jgrid.dataSource.filter($filter);
                    } else {
                        jgrid.dataSource.filter({});
                    }
                }
            }
        });

        var jgrid = $("#boxesgrid").kendoGrid({
            columns: [
                {
                    field: "AppName",
                    title: "App"
                },
                {
                    field: "JobId",
                    title: "Job Id"
                },
                {
                    field: "JobName",
                    title: "Job Name",
                },
                {
                    field: "JobStatus",
                    title: "Status"
                },
                {
                    field: "JobStatusId",
                    title: "Status Code"
                },
                {
                    field: "HasChildren",
                    title: "Has Children"
                },
                {
                    field: "ChildrenCount",
                    title: "Child Jobs"
                }
            ],
            sortable: {
                mode: "single",
                allowUnsort: true
            },
            pageable: {
                pageSizes: [10],
                numeric: true,
                refresh: true,
                pageSize: 10
            },
            autoBind: false,
            scrollable: false,
            resizable: true,
            detailInit: detailInit,
            dataSource: boxesDataSource
        }).data("kendoGrid");

        function detailInit(e) {
            var eventData = e;
            $.ajax({
                url: apiUrl + "ProcessJobs",
                type: "POST",
                data: {BoxId: e.data.JobId, AppId: e.data.AppId}, 
                dataType: "json",
                success: function(data, status, xhr) {
                    initializeDetailGrid(eventData, data);
                }
            });
        };

        function initializeDetailGrid(e, result) {
            var moreChildren = result[0].HasChildren;
            var gridBaseOptions = {
                dataSource: result,
                scrollable: false,
                sortable: true,
                columns: [
                    {
                        field: "ParentJobId",
                        title: "Parent Job"
                    },
                    {
                        field: "JobId",
                        title: "Job Id"
                    },
                    {
                        field: "JobName",
                        title: "Job Name",
                    },
                    {
                        field: "JobStatus",
                        title: "Status"
                    },
                    {
                        field: "JobStatusId",
                        title: "Status Code"
                    },
                    {
                        field: "HasChildren",
                        title: "Has Children"
                    },
                    {
                        field: "ChildrenCount",
                        title: "Child Jobs"
                    }
                ]
            };

            var gridOptions = {};
            if (moreChildren) {
                gridOptions = $.extend({}, gridBaseOptions, { detailInit: detailInit });
            } else {
                gridOptions = gridBaseOptions;
            };
            $("<div/>").appendTo(e.detailCell).kendoGrid(gridOptions);
        };
    });
</script>

<div class="col-md-2">
    <div class="panel panel-default">
        <div class="panel-heading">Line of Business</div>
        <div class="panel-body" id="lobnav"></div>
    </div>
    <div class="panel panel-default">
        <div class="panel-heading">Application</div>
        <div class="panel-body" id="lobapp"></div>
    </div>
    <div class="panel panel-default">
        <div class="panel-heading">Filter</div>
        <div class="panel-body" id="jobfilter">
        </div>
    </div>
</div>
<div class="col-md-10">
    <div id="boxesgrid"></div>
</div>

The data is actually hardcoded for this sample app, but I still return it via Web API. Here is a sample of the highest level data:

new Process {JobId = 108, AppId = 1, AppName = "App1", LobId = 2, LobName = "Lob2", JobName = "job_108", ParentJobName = null, ParentJobId = null, JobStatusId = 4, JobStatus = "Running", ChildrenCount = 3, HasChildren = true},
new Process {JobId = 109, AppId = 1, AppName = "App1", LobId = 2, LobName = "Lob2", JobName = "job_109", ParentJobName = null, ParentJobId = null, JobStatusId = 5, JobStatus = "Success", ChildrenCount = 4, HasChildren = true},
new Process {JobId = 110, AppId = 1, AppName = "App1", LobId = 2, LobName = "Lob2", JobName = "job_110", ParentJobName = null, ParentJobId = null, JobStatusId = 4, JobStatus = "Running", ChildrenCount = 2, HasChildren = true},
new Process {JobId = 111, AppId = 1, AppName = "App1", LobId = 2, LobName = "Lob2", JobName = "job_111", ParentJobName = null, ParentJobId = null, JobStatusId = 5, JobStatus = "Success", ChildrenCount = 5, HasChildren = true},

Here is some second level data (child data):

new Process {JobId = 1037, AppId = 1, AppName = "App1", LobId = 2, LobName = "Lob2", JobName = "job_1037", ParentJobName = "job_109", ParentJobId = 109, JobStatusId = 4, JobStatus = "Running", ChildrenCount = 0, HasChildren = false},
new Process {JobId = 1038, AppId = 1, AppName = "App1", LobId = 2, LobName = "Lob2", JobName = "job_1038", ParentJobName = "job_109", ParentJobId = 109, JobStatusId = 4, JobStatus = "Running", ChildrenCount = 0, HasChildren = false},
new Process {JobId = 1039, AppId = 1, AppName = "App1", LobId = 2, LobName = "Lob2", JobName = "job_1039", ParentJobName = "job_110", ParentJobId = 110, JobStatusId = 4, JobStatus = "Running", ChildrenCount = 2, HasChildren = true},
new Process {JobId = 1040, AppId = 1, AppName = "App1", LobId = 2, LobName = "Lob2", JobName = "job_1040", ParentJobName = "job_110", ParentJobId = 110, JobStatusId = 4, JobStatus = "Running", ChildrenCount = 2, HasChildren = true},

Some of the 3rd level data (grandchildren):

new Process {JobId = 5000, AppId = 1, AppName = "App1", LobId = 2, LobName = "Lob2", JobName = "job_5000", ParentJobName = "job_1039", ParentJobId = 1039, JobStatusId = 5, JobStatus = "Success", ChildrenCount = 0, HasChildren = false},
new Process {JobId = 5001, AppId = 1, AppName = "App1", LobId = 2, LobName = "Lob2", JobName = "job_5001", ParentJobName = "job_1039", ParentJobId = 1039, JobStatusId = 5, JobStatus = "Success", ChildrenCount = 0, HasChildren = false},
new Process {JobId = 5002, AppId = 1, AppName = "App1", LobId = 2, LobName = "Lob2", JobName = "job_5002", ParentJobName = "job_1040", ParentJobId = 1040, JobStatusId = 5, JobStatus = "Success", ChildrenCount = 0, HasChildren = false},
new Process {JobId = 5003, AppId = 1, AppName = "App1", LobId = 2, LobName = "Lob2", JobName = "job_5003", ParentJobName = "job_1040", ParentJobId = 1040, JobStatusId = 5, JobStatus = "Success", ChildrenCount = 0, HasChildren = false},
new Process {JobId = 5004, AppId = 1, AppName = "App1", LobId = 2, LobName = "Lob2", JobName = "job_5004", ParentJobName = "job_1041", ParentJobId = 1041, JobStatusId = 5, JobStatus = "Success", ChildrenCount = 1, HasChildren = true},

And so on...

It is working correctly for 4 levels in my testing. There are formatting issues with the multiple nested grids that I will be addressing.

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