
Hi All,
I work in one of the Big 4 firms and we have been using Kendo for a few years now but recently an issue has cropped up when virtual vertical scrolling does not work when the grid is sorted on a column. It does not matter what column. Scrolling works fine without the sorting when the grid loads. When sorted on any column the grid loads the first pagesize items but on going to the end of the page the new items does load. No call to the server also being made and no network or console activity
Here is the code
@(Html.Kendo().Grid<IGridItem>()<br>    .Name(gridName)<br>    .HtmlAttributes(new { @class = "table-response browse-table " + Model.GridType.ToString().ToLower() + "-grid-type" })<br>    .Columns(columns =><br>    {<br>        columns<br>            .Bound("Name")<br>            .Title(MarkupMessages.Grid_NameHeader)<br>            .Width(500)<br>            .HeaderTemplate("<span" + MarkupMessages.Grid_NameHeader + "</span>")<br>            .HtmlAttributes(new { @class = "name-column" })<br>            .ClientTemplate(nameColumnTemplate)<br>            .Locked(true)<br>            .Lockable(false)<br>            .Hidden(false)<br>            .Sortable(true)<br>            .Filterable(false)<br>            .Visible(Model.GridColumnConfiguration.HasFlag(GridColumnEnum.Name));<br>        columns<br>            .Bound("ID")<br>            .Title("")<br>            .Width(30)<br>            .HeaderTemplate("")<br>            .HtmlAttributes(new {@class = "context-menu-column"})<br>            .ClientTemplate(menuColumnTemplate)<br>            .Locked(true)<br>            .Lockable(false)<br>            .Hidden(false)<br>            .Sortable(false)<br>            .Visible(Model.GridColumnConfiguration.HasFlag(GridColumnEnum.ID))<br>            .Filterable(false);<br>        columns<br>            .Bound("Category")<br>            .Title(MarkupMessages.Grid_CategoryHeader)<br>            .Width(200)<br>            .ClientTemplate("<div>#: Category #</div> ")<br>            .Locked(false)<br>            .Lockable(false)<br>            .Hidden(false)<br>            .Sortable(true)<br>            .Visible(Model.GridColumnConfiguration.HasFlag(GridColumnEnum.Type))<br>            .Filterable(filter =><br>            {<br>                filter.Multi(true);<br>                filter.CheckAll(false);<br>                filter.ItemTemplate("itemTemplate");<br>                filter.DataSource(source =><br>                {<br>                    source.Read(r => r.Url(Model.Url));<br>                    source.Events(e => e.RequestStart("GridHelper.filterCancelRequest"));<br>                });<br>            });<br>        columns<br>            .Bound("LastModifiedDate")<br>            .Title(MarkupMessages.Grid_LastModifiedDateHeader)<br>            .Width(200)<br>            .ClientTemplate("<div>#: LastModifiedDate #<div>")<br>            .Locked(false)<br>            .Lockable(false)<br>            .Hidden(false)<br>            .Sortable(true)<br>            .Filterable(false)<br>            .Visible(Model.GridColumnConfiguration.HasFlag(GridColumnEnum.LastModifiedDate));<br>    .DataSource(ds => ds<br>        .Ajax()<br>        .ServerOperation(Model.ServerOperation)<br>        .Sort(sort =><br>        {<br>            if (Model.DefaultSortOrder == SortDirection.Descending)<br>            {<br>                sort.Add(Model.DefaultSort).Descending();<br>            }<br>            else<br>            {<br>                sort.Add(Model.DefaultSort).Ascending();<br>            }<br>        })<br>        .PageSize(200)<br>        .Read(read =><br>        {<br>            read.Url(Model.Url);<br>            read.Data(dataSourceGetAdditionalData);<br>        })<br>        .Events(events => events.Error(dataSource_Error)))<br>    .AutoBind(false)<br>    .Sortable(sortable => sortable.SortMode(GridSortMode.SingleColumn).AllowUnsort(false))<br>    .Scrollable(scrollable => scrollable.Virtual(true).Height(382))<br>    .Resizable(resizable => resizable.Columns(true))<br>    .Reorderable(reorder => reorder.Columns(true))<br>    .Filterable(filter =><br>    {<br>        filter.Enabled(true);<br>        filter.Extra(false);<br>    })<br>    .Events(events =><br>    {<br>        if (!String.IsNullOrEmpty(gridEvent_SelectionChanged))<br>        {<br>            events.Change(gridEvent_SelectionChanged);<br>        }<br><br>        if (!String.IsNullOrEmpty(gridEvent_DataBound))<br>        {<br>            events.DataBound(gridEvent_DataBound);<br>        }<br><br>        if (!String.IsNullOrEmpty(gridEvent_DataBinding))<br>        {<br>            events.DataBinding(gridEvent_DataBinding);<br>        }<br><br>        if (!String.IsNullOrEmpty(gridEvent_FilterInitialize))<br>        {<br>            events.FilterMenuInit(gridEvent_FilterInitialize);<br>        }<br><br>        if (!String.IsNullOrEmpty(gridEvent_ColumnReorder))<br>        {<br>            events.ColumnReorder(gridEvent_ColumnReorder);<br>        }<br>    }))var battingDataSource = new kendo.data.DataSource({    schema: {        model: {            id: "PlayerId",            fields: {                PlayerId: { editable: false, nullable: true },                PlayerFullName: { validation: { required: true } },                BattingOrder: { type: "number", validation: { required: true, min: 1, max: 11 } },                RunsScored: { type: "number", validation: { required: true, min: 0 } },                BallsFaced: { type: "number", validation: { required: true, min: 0 } },                Fours: { type: "number", validation: { required: true, min: 0 } },                Sixes: { type: "number", validation: { required: true, min: 0 } },            }        }    },    batch: true,    transport: {        create: {            url: "/MatchPlayer/Create",            type: "POST"        },        update: {            url: "/MatchPlayer/Update",            type: "POST"        },        read: {            url: "/MatchPlayer/Read",            type: "POST"        },    },    parameterMap: function (data, operation) {        alert("hit");        if (operation != "read") {            // post the players so the ASP.NET DefaultModelBinder will understand them:            var result = {};            for (var i = 0; i < data.models.length; i++) {                var player = data.models[i];                for (var member in player) {                    result["players[" + i + "]." + member] = player[member];                }            }            return result;        }    }});
I have a form with a few fields. I want to take the form data and pass it to a Kendo Datasource so when I hit "Save" it will call my existing back-end JSDO class and save the data to the database. Are there examples of this anywhere?
I have found an example of a remote bound form to save to the back-end with an already existing DB record (ID). But my request is for new records with no ID.
https://demos.telerik.com/kendo-ui/mvvm/remote-binding

I am evaluating Kendo UI Grid trial version to replace a third party grid control being used in one existing web forms application. 
Environment : ASP.NET Web Forms Application (NOT MVC) (.NET Framework 4.5, upgraded from .NET Framework 2.0), Oracle 11g. 
Browser : IE 11.
I am trying to implement Virtual scrolling with Remote data.
But it is not working. Data is only visible up to the height of the grid. Scroll bar is not appearing. 
Setting 
serverPaging: true,
serverSorting: true
does not show any data.
Could anyone tell me where I am going wrong ?
The server side function GetData() invokes database stored procedure which returns all data. It will not be possible to implement paging in the store procedures as there are a very large number of different grids aka stored procedures. If this is the cause of Virtual Scrolling not working, please suggest me the work around.
Sample code is as follows:
ManageUsers.aspx<asp:Content ContentPlaceHolderID="mainContent" ID="conPort" runat="server">         <link href="styles/kendo.common.min.css" rel="stylesheet" />    <link href="styles/kendo.metro.min.css" rel="stylesheet" />    <script src="js/jquery.min.js"></script>    <script src="js/kendo.all.min.js"></script>    <script type="text/javascript">        $(document).ready(function ()        {            $('#dvGrid').kendoGrid({                scrollable: { virtual: true },                sortable: true,                selectable: "row",                filterable: true,                dataSource:                    {                        transport:                            {                                read:                                    {                                        url: "ManageUsers.aspx/GetData",                                        type: "POST",                                        contentType: "application/json; charset=utf-8",                                        dataType: "json"                                    }                            },                        schema:                            {                                data:                                  function (response)                                  {                                      return $.parseJSON(response.d);                                  }                            },                        type:"json",                        pageSize: 10//,                        //serverPaging: true,                        //serverSorting: true,                        //batch: true                    },                columns: [                {field: "ID", title: "USER ID"},                {field: "USER_NAME", title: "USER NAME"}                ]            });        });    </script>    <div>        <div id="dvGrid" class="k-widget k-grid" style="width:450px;height:350px"></div>    </div></asp:Content>////////////////////////////////////////ManageUsers.aspx.csusing Newtonsoft.Json;[System.Web.Services.WebMethod]        public static string GetData()        {            TblUser objTblUser = new TblUser();            DataSet objDataSet = new DataSet();            objDataSet = objTblUser.DataSetLoad("A", 0);                         DataView dvw = objDataSet.Tables[0].DefaultView;            dvw.RowFilter = " USER_NAME LIKE 'E%' ";                         return JsonConvert.SerializeObject(dvw.ToTable());        }////////////////////////////The converted JSon data is as follows:[{"ID":2.0,"USER_NAME":"DANIEL S"},{"ID":3.0," USER _NAME":"DANIEL Z"},{"ID":6.0," USER _NAME":"DANIELS"},{"ID":19.0," USER _NAME":"DAVID"},{"ID":42.0," USER _NAME":"DEEPAK"},{"ID":48.0," USER _NAME":"DELIA"},{"ID":56.0," USER _NAME":"DEYAN"},{"ID":57.0," USER _NAME":"DHEERAJ"},{"ID":67.0," USER _NAME":"DURIAN"},{"ID":71.0," USER _NAME":"DIMITAR"},{"ID":89.0," USER _NAME":"DIMITAR Z"},{"ID":90.0," USER _NAME":"DOBROMIR"},{"ID":96.0," USER _NAME":"DUNCAN"}]Hello,
We have a donu chart we draw with the kendo ui vue chart and it looks good. We place it in a small html iframe as you can see in the attached screen shot.
The chart is using 100% of the (small) frame size. As you can see in the attached screen shot, it is not vertically aligned. Since the generated svg occupies 100% of the area I assume it is something in the seriesDefaults to tweak for it to be vertically centered. But I could not find how to do it. Please advise.
Thanks,
Ron.

Hi there,
On tab drag i want to update a field in the datasource. But as soon as datasource sync is called an "Index of undefined" error is received. This is the sortable section of the tabstrip:
var configureSortable = function () {
            $("#tabstrip ul.k-tabstrip-items").kendoSortable({
                filter: "li.k-item",
                axis: "x",
                container: "ul.k-tabstrip-items",
                hint: function (element) {
                    return $("<div id='hint' class='k-widget k-header k-tabstrip'><ul class='k-tabstrip-items k-reset'><li class='k-item k-state-active k-tab-on-top'>" + element.html() + "</li></ul></div>");
                },
                start: function (e) {
                    tabstrip.activateTab(e.item);
                },
                change: function (e) {
                    var tabstrip = $("#tabstrip").data("kendoTabStrip"),
                        reference = tabstrip.tabGroup.children().eq(e.newIndex);
                    if (e.oldIndex < e.newIndex) {
                        tabstrip.insertAfter(e.item, reference);
                    } else {
                        tabstrip.insertBefore(e.item, reference);
                    }
                },
                move: function(e) {
                    //NOTE: the heading element will be excluded from the
                    //collection as it does not match the filter
                    //e.preventDefault();
                    //shows the original position of the item
                    var originalPos = this.indexOf(e.item);
                    console.log("index of item", originalPos);
                    //shows the position where item will be moved to
                    var newPos = this.indexOf(this.placeholder);
                    console.log("index of placeholder", newPos);
                    //var item = tabStrip.dataSource.at(originalPos);
                    //console.log(item.id + item.pos + item.name + item.status + newPos);
                    //item.set("pos", newPos);
                    //tabStrip.dataSource.sync();
                    var tabstrip = $("#tabstrip").data("kendoTabStrip");
//this gives me a null
                    //var dataItem = tabstrip.dataSource.get(e.item.data("id"));
                    var dataItem = tabstrip.dataSource.at(originalPos);
     //i tried this as well
                    //tabstrip.dataSource.remove(dataItem);
                    //tabstrip.dataSource.insert(newPos, dataItem);
                    dataItem.set("pos", newPos);
                    tabstrip.dataSource.sync();
                }
            });
        };

I am seeing VERY strange behavior using a kendoValidtor with a listView. The listview is a table and each line looks like this:
<script type="text/x-kendo-tmpl" id="tmplMenuOptionsGroupRow">  <tr>      <td class="w-25">          <i class="fal fa-arrows fa-2x dragHandler"></i>      </td>      <td class="w-50">          <input name="optionDesc" class="form-control k-textbox k-input-lg" required validationMessage="Enter Description"              data-bind="value: description, disabled:legacy, events:{change: editorModel.menuOptionGroup.onMenuItemOptionsGroupChange}" />                    </td>      <td class="w-25 dragHide text-left">          <input class="w-100 k-input-lg" data-role="numerictextbox"              data-format="c"              data-min="0"              data-format="c2" name="optionPrice"              data-spinners=false required validationMessage="Enter Price"              data-bind="value:price, disabled:legacy, events:{change: editorModel.menuOptionGroup.onMenuItemOptionsGroupChange}" />              <span class="k-invalid-msg" data-for="optionPrice"></span>                     </td>             <td class="dragHide" >          <button type="button" class="btn btn-danger btn-sm" data-bind="click:editorModel.menuOptionGroup.deleteOption, disabled:legacy"><i class="fal fal fa-trash-alt"></i>          </button>      </td>  </tr></script>
As you can see the optionDesc field is a mandatory field and I have defined a validationMessage when it is empty.
However when I test it I see the following results (see 2020-03-29_1045.png)
As you can see the error message appears nexts ALL the optionDesc fields and not just the one that is missing.
So I thought I would try a different approach with the optionPrice field (also required). so I added a k-invalid-msg right next to the field in the same <tr> and <td >as the input.
However it also behaves incorrectly and even MORE strangely. Basically the error message is displayed in the correct spot the first time. After that if any other field in another row is blank the error message is displayed in the original place and NOT next to the empty field. See image 2020-03-29_1049.png as an example. The field in row 3 is missing but the error message is showing in row 1 where it was previously missing.
Anyone have ideas/suggestions?
Alon
