I have a grid where the columns are dynamic.  By default (no schema set) all the columns are strings which causes the sorting to not be that helpful.

I use a web service that returns json to get the data for the grid, can I define the column types there or would that be a separate call?

Once I know the column types is it possible to set the column format based on the type? 

I have some code that defines the field type for columns if I know their exact name but that isn't very practical because there are many different possible column names.
I also have some code that sets the template or format for a given column but it is also hard coded and not scalable.
Any help would be appreciated. 

I am using the Kendo grid in remote virtualization mode for a very large data set. My stored procedures are aware of paging and capable of returning partial data fetches, instead of returning all rows for every request. Each service call will return exactly one page worth of data (100 records) based on my start/end markers. I use the request object to calculate the appropriate offsets for the next pull.

There are several 1000 records in my total record set, so I would like to avoid pulling all the data for every request.

However, for some reason I am not able to use ToDataSourceResult to build the JSON object that the grid expects to be passed back from my virtualization action:

EX:
public ActionResult Virtualization_GetProducts([DataSourceRequest] DataSourceRequest request, int productId)
        {
   int startIndex = (request.Page - 1) * request.PageSize + 1;
            int endIndex = startIndex + request.PageSize - 1;
            var result = service.GetProducts(productId,startIndex,endIndex);

            return Json(result.ToDataSourceResult(request));
        }

The result that I get is {"Data":[],"Total":100,"AggregateResults":null,"Errors":null} -- even though I get back the expected result from the service.

If I instead return all the data without using startIndex/endIndex the grid is able generate the correct JSON.

All the examples I've found (including your demo) involve pulling all the data in your data source every time. Is there a way to make this work with a data source that supports its own paging like above?

Hi there,

slowly getting used to this MVVM thing but I still have some problems.

I set up my viewmodel as a kendo.observable and also set a datasource and a method:

My orders (the list) is displayed without any problem (tho it took me some time to accomplish that) 
Now I'm trying to display the corresponding details for each order in my detailsView:

Nothing happens...
When I am moving the showOrderDetail out of my viewmodel (as function showOrderModel(e){ ...} everything works.
But I want to capsule the corresponding functions of a model (which is showing details) into that model. Or am I missing sth?

Hope someone can point me into the right direction.
Thx

I have two views that use the same data for different purposes (only showing the one with a problem below, they are basically the same thing). They each have a button group at the top and bottom of the list.  The problem I have is when I scroll to the bottom of one of my groups such as the A-E group, then click one of the button group buttons to load another set, it can be quite a bit shorter and nothing shows in the view.  I have to "double-click/drag" on the surface to get it to "come down" and show the list.  So I have been trying to get the scroller reset to work.  Scroller reset works fine in other areas of my app where the data-show function has access to the view.  But the data-select from the button group does not seem to pass the view to the function.  At least that is what I see from your sample code for button groups and data-select.  So when I try to get the view in the function from data-select, it works for one of the views but not for the other.  The one that does not work executes a data-show function from a different view, or rather it does the scroll work, but then also calls this unrelated function which renders a different view for another part of the app.  The extra function it calls is mobileCompanyPackageDataBind which is for the view in the code below the one I am working with.  If I use the Back button it shows the correctly scrolled alpha group I wanted, but there has got to be something wrong that it does this extra thing.  What is going on and can I work around it?



EDIT:
I figured out a work around.  I save the appropriate view similar to above but do the scroller and scroller.reset in the change event of the datasource.  That seems to consistently work.

how to get the device ip address using cordova or jquery mobile
i tried the following example but does not work

http://simonmacdonald.blogspot.com/2012/08/so-you-wanna-write-phonegap-200-android.html

Hi, I am having problems using an instance of a kendo.Data.Model in a HierarchicalDataSource.

I tried this simple model for a folder object:

var folderModel = kendo.data.Model.define({
    id: "Id",
    hasChildren: "HasChildren",
    children: "Children",
    fields: {
        Id: { editable: false, nullable: true },
        Name: { validation: { required: true} },
        ParentFolderId: { editable: false, nullable: true }
    }
});

Then created a simple data source using that as the model:

var folderStore = new kendo.data.HierarchicalDataSource({
    transport: {
        read: {
            url: "/Folders/",
            dataType: "json",
            type: "POST"
        },
    },
    schema: {
        model: folderModel
    }
});

The datasource is then used to bind a TreeView.

$(function () {
    $("#folderTreeView").kendoTreeView({
        dataSource: folderStore,
        dataTextField: ["Name"]
    });
});

This fails and the treeview is not bound.

However, it does work if I use an inline approach when defining the datasource:

var folderStore = new kendo.data.HierarchicalDataSource({
    transport: {
        read: {
            url: "/Folders/",
            dataType: "json",
            type: "POST"
        },
    },
    schema: {
        model: {
            id: "Id",
            children: "Children",
            hasChildren: "HasChildren"
        }
    }
});

Even if I simplify the model down to:

var folderModel = kendo.data.Model.define({
    id: "Id",
    children: "Children",
    hasChildren: "HasChildren"
});

I cannot use it in the datasource.

Must be missing something here, please advice. Would like to use the model for CRUD operations elsewhere and want to use the same model in the treeview.

Hi, 

I am unable to send parameters for a DELETE (destroy) as urlencoded (it gets sent in the request body instead). I am able to send parameters for GET as urlencoded, but not for DELETE. I have the following defined in a datasource below.

Any ideas?

Cheers,
Vaughn
KendoUI version: 2012.3.1315
Platform: Phonegap 2.2.0 on Android 2.2 API (running on Android 4.2 Phone). 

----
var access_token = "something";
var url = "http://something.com/something";
read: {
  url: url, 
dataType: "json",
contentType: "application/x-www-form-urlencoded",
data: {
access_token: access_token,
}                
},
destroy: {
url: "determined at runtime",
type: "DELETE",
contentType: "application/x-www-form-urlencoded",
data: {
access_token: access_token,
},
},
parameterMap: function(options, type) {
return options;
}

My grid has lost it's mind. Why am I seeing two pager sections? One that seems to work and the other has no idea?

Does any one know how or why this could happen?  Code Below.

View

@(Html.Kendo().Grid<AppointmentsDTO>()

                .Name("divgrid")

                .Columns(columns =>

                {

                    columns.Bound(o => o.MemberFirstName).Title("Member<br/>First Name");

                    columns.Bound(o => o.MemberLastName).Title("Member<br/> Last Name");

                    columns.Bound(o => o.ClientMemberID).Title("Client<br/>MemberID");

                    columns.Bound(o => o.ProviderID).Title("ProviderID");

                    columns.Bound(o => o.ProviderFirstName).Title("Provider<br/> First Name");

                    columns.Bound(o => o.ProviderLastName).Title("Provider<br/> Last Name");

                    columns.Bound(o => o.AppointmentDate).Title("Appointment<br/> Date");

                    columns.Bound(o => o.IHAAppointmentID).Hidden(true);

                })

                .DataSource(dataSource => dataSource

                .Ajax()  

                .Read(read => read.Action("ScheduledAppointments", "AppointmentScheduling")

                .Data("additionalData")

                    //the name of the JavaScript function which will return the additional data

                ))

               .Pageable() 

               .AutoBind(false)   

               .Scrollable()

          )

 JavaScript

$('#btnSearch').click(function () {

        DoSearch();

    });

   

    function DoSearch() {

        var grid = $("#divgrid").data("kendoGrid");

        grid.dataSource.read();       

    }

 

    function additionalData() {

        return {

            beginDate: $("#startDate").val(),

            endDate: $("#finishDate").val()

        };

    }

Controller

[HttpPost]

        public ActionResult ScheduledAppointments([DataSourceRequest]DataSourceRequest request, string beginDate, string endDate)

        {

            //calling service           

            var result = model.AppointmentList.ToDataSourceResult(request);

            JsonResult jresult = GetJsonResult(result, true);

 

            return jresult;

        }

 

Hello,

I'm not sure if this should be posted here or in a premium forum?

We have an MVC4 based web app we need to run in Android and IOS based browsers.

We are looking to use Kendo UI Mobile from our  but need to ask a few questions?

1. Can we use the MVC4 Data Annotations built-in validation and optimize the MVC4 validation summary style for mobile?
2. Can we use the MVC4 HtmlHelper ValidationSummary method?
3. We do not want to use the Kendo UI validators.  Can we instead use the validator script generated by the MVC4 runtime inspecting the Model attributes (ie Required, Range, etc)?

Will Kendo UI Mobile support what we are trying to do?

Thanks...Bob Baldwin
Trabon Solutions
Devcraft Complete Licensed Customer

Hello,

I have run into a problem when trying to use several ViewModels referencing the same model.
ViewModels and models are all ObservableObjects.
Please, consider the following simple example:

    // observable for model
    var model = kendo.observable({ mf: 0 });      

    // observables for two viewmodels
    var vm1 = kendo.observable({ vmFld1: null });
    var vm2 = kendo.observable({ vmFld2: null });

    // set fields of both viewmodels to the same
    // observable model
    vm1.set("vmFld1", model);
    vm2.set("vmFld2", model);

Both ViewModels bind CHANGE event handlers in ObservableObject.wrap() method.
They are added to the array of CHANGE event handlers of the model and are to be triggered when model field is changed.
E.g. like in the line of code below

    // change the value of model field
    vm1.set("vmFld1.mf", 1);

These event handlers are invoked in a loop of Observable.trigger() method.
But each event handler modifies the e.field in event argument e.

wrap: function(object, field, parent) {
    var that = this;
    …
    (function(field) {           
            ...

            object.bind(CHANGE, function (e) {
                e.field = field +  "."  + e.field;
                that.trigger(CHANGE, e);
            });
    })(field);
    ...
}

It should work just fine for the case when we have a linear chain of nested ObservableObjects, but in my case it is rather a tree with single ObservableObject root. The second ViewModel gets incorrect "path" to changed field in CHANGE event handler.

In example above the first ViewModel gets "vmFld1.mf" in CHANGE event. Then it modifies the path in its handler and the second ViewModel vm2 gets incorrect path "vmFld2.vmFld1.mf". 

As a result, vm2 does not refresh view when View-ViewModel binding is used.

I'm not sure if you already know about this and it might be even already fixed in latest version. But I can look only into available for download open source code which is of 2012.3.1114 version.

I very appreciate if you can resolve this issue. Thank you.