I have a problem where if I add the "for" tag to my dropdown list my cascading stops working.

Here is the code that allows for selecting an item in the dropdown list which changes what is seen in the second dropdown list:

And here I have added some code so that my model gets updated when the HTML post is called:

as soon as I do that, the fist dropdown box no longer affects the second one.

the only thing I add is: for="CountryId" in the first dropdown.

The model:

Let me know if I'm doing something wrong here.  I'm creating a Web Service to service my Web Application through a REST API.  One class of methods I'm exposing provides the view models that feed into Kendo UI controls, like the grid.  I'm trying to separate the concerns of the client and server by passing the paging parameters to the service and, when the service has completed the query and reduced the results down to a specific number of items (page size) on a given page (page #), I attempt to return the results to the client using the following:

            DataSourceResult dataSourceResult = investments.ToDataSourceResult<InvestmentViewModel>(dataSourceRequest);
            dataSourceResult.Total = total;
            return Json(dataSourceResult);

On the client, I attempt to deserialize this data with:

                //Deserializing the response recieved from web api and storing into the Employee list

                dataSourceResult = JsonConvert.DeserializeObject<DataSourceResult>(result);

But I get an error message:

                Newtonsoft.Json.JsonSerializationException: 'Cannot create and populate list type System.Collections.IEnumerable. Path 'data', line 1, position 9.'

What is the proper way to deserialize the DataSourceResult JSON?

Hello,

I am using the old Jquery pie charts, these are getting populated by the model (The model will be populated by a stored procedure), however, i am trying to migrating to the new Pie chart Tag Helpers but i can not seem to use a Model as the data-source, is this possible and if so how can i achieve this?

To access item values in a template you should, as I understand it, use a construct like:

.Columns(factory => factory.Template(@<text><img title="@item.Receiver" src="/image/information.png"/></text>)

but when doing this I get the compilation error "Cannot convert lambda expression to type 'string' because it is not a delegate type".

Im trying to make custom editor template for inline edit mode i a .net core grid with tag helper

<kendo-grid name="grdKontaktpersoner" on-change="KontaktChange" deferred="true">
                    <datasource server-operation="false" type="DataSourceTagHelperType.Ajax" on-error="error_handler">
                        <transport>
                            <create url="/Omvisning/OpretKontakt" data="hentBestillerID" />
                            <read url="/Omvisning/HentKontakt" data="hentBestillerID" />
                            <update url="/Omvisning/OpdaterKontakt" />
                            <destroy url="/Omvisning/OpdaterKontakt" />
                        </transport>
                        <schema>
                            <model id="ID">
                                <fields>
                                    <field name="Navn" type="string" />
                                    <field name="E_Mail" type="string" />
                                    <field name="Tlfnr" type="string" />
                                    <field name="RefNr" type="string" />
                                </fields>
                            </model>
                        </schema>
                    </datasource>
                    <toolbar>
                        <toolbar-button name="create" text="Opret Kontaktperson" />
                    </toolbar>
                    <editable enabled="true" mode="inline" />
                    <scrollable enabled="false" />
                    <columns>
                        <column field="ID" hidden="true" />
                        <column field="Navn" title="Navn" editable="NavnEditor" />
                        <column field="E_Mail" title="Email"  width="200" />
                        <column field="Tlfnr" title="Telefonnr."   width="100"/>
                        <column field="RefNr" title="Ref. nr."  width="100" />
                        <column>
                            <commands>
                                <column-command name="edit" text="Ret"></column-command>
                                <column-command name="destroy" text="Slet"></column-command>
                            </commands>
                        </column>
                    </columns>
                </kendo-grid>

        function NavnEditor(container, options) {
            var grid = $('#grdKontaktpersoner').data('kendoGrid');
            $('<input required name="' + options.field + '"/>')
                .appendTo(container);
        }

the problem is that the options field in the template  is undefined

I have look at your documentation here:

https://docs.telerik.com/aspnet-core/tag-helpers/data-management/grid/overview#column-templates

what is im missing

Hello,

I have my labels formatted as 2011 9 (year month). Now I want to set that to the following:

sep 2011

I have tried the following:
.Labels(labels => labels.Format("{0:MMM yyyy}")

But this is not working. Someone that can provide me a solution for this?

Currently receiving the following error when attempting to implement server side sum aggregation when the grid is bound to a dynamic object.

No generic method 'Sum' on type 'System.Linq.Enumerable' is compatible with the supplied type arguments and arguments. No type arguments should be provided if the method is non-generic.

Using the following code to setup Aggregates, the col.DataType is System.Decimal. Min and Max aggregates work correctly.

.Aggregates(aggr =>
                {
                    Model.Columns.Where(x => x.SQLDataType == "money").ToList().ForEach(x =>
                    {
                        var col = Model.Columns.FirstOrDefault(c => c.ColumnName == x.ColumnName);
                        if (col != null)
                        {
                            aggr.Add(col.ColumnName, col.DataType).Sum();
                        }
                    });
                })

this template does not work

<column field="Dato" title="Dato" template="#= (Dato == null) ? ' ' : kendo.toString(Dato, 'dd-MM-yyyy') #" />

t works in a html helper grid

t shows the time also

I'm using html tags and am trying to display an editor that is disabled.

I don't see disabled, enabled, contentenabled available.  How can I disable the editor? 

Hi Team,

I have a requirement to show the menu items as a Treeview from the database. I am able to bring the items to the without any issues. The problem I am facing here is, it's not auto-expanding by default even after the Expandall(true) function in  component. Even I tried to achieve this functionality using Javascript. But, it is not working since Javascript is executing before the . My code is,

@(Html.Kendo().TreeView()
                    .Name("treeview")
                    .DataTextField("Name")
                    .ExpandAll(true) //This expandall is not working here.
                    .DataSource(dataSource => dataSource
                        .Read(read => read
                            .Action("ReadMenuItem", "GroupWellness")
                        )
                    )
                    .Events(events=> events
                           .Select("onSelect")
                           )
         )

Java script function  //Below function is executing before the data loads in the above tree. So, it is not expanding.

$(document).ready(function () {
            $("#treeview").kendoTreeView({
                dataBound: function (e) {
                    var treeView = $('#treeview').data('kendoTreeView');
                    treeView.expand(".k-item");
                 }
            });
    });

After all this methods is not working, I thought of achieving the same treeview using kendo UI JQuery. But, there I am it is throwing 404 error while reading my URL. JQuery part is,

var dataSource = new kendo.data.HierarchicalDataSource({
           transport: {
                read: {
                    url: '/GroupWellness/ReadMenuItem', //I am facing 404 error here while reading my data source.
                    dataType: "jsonp"
                }
            }
        });

        $("#treeview").kendoTreeView({
            dataSource: dataSource
        });

Please help me to achieve Expand all functionality by default based on my requirement.