Questions on UI for ASP.NET MVC Forum

2 answers

378 views

I have a chart with many colors. The tooltip should appear as black or white depending on the background color of the chart's bar. The only option I can think of is handle this with the series.name. But nothing works.

This code does accurately put a white or a black piece of text onto the screen as a tooltip:

.Tooltip(tooltip => tooltip
.Visible(true)
.Template("# if ((series.name === 'foo') || (series.name === 'bah')) { return '<strong style=\"color: black\">bar</strong>'; } else { return '<strong style=\"color: white\">bar</strong>'; } #")
)

However, once I plug in #= series.name # #= value # instead of bar the function breaks down and it no longer works.

Next, I tried both SharedTemplate and Template as such (one at a time of course):

.Tooltip(tooltip =>
tooltip.Visible(true).Template("mytemplate")
tooltip.Visible(true).SharedTemplate("mytemplate")
)

<script id="mytemplate" type="text/x-kendo-template">
# if ((series.name === 'foo') || (series.name === 'bah')) { #
<strong style="color: black">bar</strong>
# } else { #
<strong style="color: white">bar</strong>
# } #
</script>

This didn't do anything and instead displayed a tooltip of "mytemplate".

Is this possible to do? If not is there any kind of work around?

Chart

answered on 24 Jun 2015

3 answers

213 views

Resources not displaying

hello, I have using the scheduler and when I inspect the control in the javascript console I can see that there is data in the resources.datasource object but for some reason the resources are not displaying in the Timeline. I'm just trying to load resources right now without events. Do I have to have events for the resources to load properly. In the old webforms scheduler you didn't need that. Also, once loaded how do I change them dynamically so that users can manipulate the timeline and look at specific combination of resources.

@(Html.Kendo().Scheduler<Avianis.Models.Scheduler.AppointmentViewModel>()
.Name("scheduler")
.Date(new DateTime(DateTime.Now.Year, DateTime.Now.Month, DateTime.Now.Day))
.Views(views =>
{
views.TimelineView(timeline => timeline.EventHeight(50));
views.TimelineWeekView(timeline => timeline.EventHeight(50));
views.TimelineMonthView(timeline => timeline.EventHeight(50));
})
.Resources(resource => resource.Add(m => m.ResourceID)
.Title("Aircraft")
.Name("Aircraft")
.DataTextField("Name")
.DataValueField("ID")
.DataSource(source => source
.Read("GetResources", "Calendar"))
)
.DataSource(d => d
.Model(m =>
{
m.Id(f => f.MeetingID);
m.Field(f => f.Title).DefaultValue("No title");
m.RecurrenceId(f => f.RecurrenceID);
m.Field(f => f.Title).DefaultValue("No title");
})
.Read("Aircraft_Read", "Calendar")
)
)

Scheduler

answered on 24 Jun 2015

3 answers

111 views

Remember TreeView state when loading nodes from server.

Hello, is there an option to remember the state of checkbox'ed items in the TreeView when loading them from the server? Such as when repopulating a complex control the TreeView is a part of?

Thanks in advance for your speedy reply, Telerik! :)

TreeView

answered on 24 Jun 2015

1 answer

662 views

How to validate model on the server when Kendo grid is configured for ajax call?

I’m using MVC Kendo grid and few drop down lists as filters and search button. Grid is bound using Ajax. The filters are defined outside of the grid. When user clicks on the search button i am passing the selected filter values to action method as Model, do the search and return the result. This is working fine when user selects the filter.
However, One of the filter is required filter, so I have [Required] attribute on the model’s property. When user don’t select the required filter, it makes the GetData() action method as expected, I see ModelState is NOT valid as expected.
But here im not sure what should I return when Model is not valid,
Questions:
I have validation summary on the layout page, how do I show model error in ValidationSummary without clearing the grid?When action method returns error, I don’t want to clear the existing result in the Grid. The error should display on top of the page.

Note: For brevity purpose my sample below showing only one filter. Also I’m not worrying about client side validation.

Layout Page

<html>

<head>

@Styles.Render("~/Content/css")

@Styles.Render("~/Content/kendo/css")

@Scripts.Render("~/bundles/modernizr")

@Scripts.Render("~/bundles/jquery")

@Scripts.Render("~/bundles/kendo")

@Scripts.Render("~/bundles/bootstrap")

@Scripts.Render("~/bundles/jqueryval")

</head>

<body>

<div class="container body-content">

@Html.ValidationSummary()

@RenderBody()

<footer></footer>

</div>

@RenderSection("scripts", required: false)

</body>

</html>

Index Page

@model MyModel

            @{

                ViewBag.Title = "Index";

                Layout = "~/Views/Shared/_Layout.cshtml";

            }

            <h2>Index</h2>

            <div>

                <br />

                @Html.ListBoxFor(x => x.SelectedIDs, new MultiSelectList(Model.States, "ID", "Name"))

                @Html.ValidationMessageFor(m => m.SelectedIDs)

            </div>

            <input id="btnSearch" type="submit" width="100" value="Search" />

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

               .Name("grid")

               .Columns(col =>

               {

               col.Bound(p => p.ID);

               col.Bound(p => p.Name);

               })

               .DataSource(ds =>

               ds.Ajax()

               .Read(r => r.Action("GetData", "Working"))

               .PageSize(3))

               .Pageable()

               .Sortable()

               .AutoBind(false)

            )

            <script src="~/Scripts/Working.js"></script>

JavaScript

$(function () {

                var myModel = {

                    SelectedIDs: []

                };



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

                dataSource.transport.options.read.data = getFilters;

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

                    myModel.SelectedIDs = $("#SelectedIDs").val();

                    $("#grid").data("kendoGrid").dataSource.read();

                    $("#grid").data("kendoGrid").refresh();

                })

                function getFilters() {

                    return myModel;

                }

            })

Controller

public class WorkingController : Controller

            {

                public ActionResult Index()

                {

                    var model = new MyModel();

                    return View(model);

                }



                public ActionResult GetData([DataSourceRequest]DataSourceRequest request, MyModel model)

                {

                    if (!ModelState.IsValid)

                    {

                        // What should i return here so that Model error message will appear in ValidationSummary ???

                    }

                    return Json(MockData.GetPersons().ToDataSourceResult(request), JsonRequestBehavior.AllowGet);

                }

            }

Model

public class MyModel

    {

        [Required(ErrorMessage = "State is required.")]

        public int[] SelectedIDs { get; set; }

        public IEnumerable<State> States

        {

            get

            {

                return MockData.GetStatesWithAbbr();

            }

        }

        public IEnumerable<Person> Persons { get; set; }

    }

Grid

answered on 23 Jun 2015

1 answer

2.2K+ views

How to implement a header template

I'm looking to make a custom header for my grid. In the end, I want it to have the title, sorting arrows, and a custom filter image button that bypasses the built-in filtering of the grid.
To start off though, how do I get it to display the title?

01.Html.Kendo().Grid<dynamic>()

02. .Name("grid")

03. .Filterable(filter => filter.Enabled(false))

04. .DataSource(ds => ds.Ajax().Read(read => read.Action("action", "controller")))

05. .Columns(columns =>

06. {

07. columns.Bound("field")

08. .Title("title")

09. .Sortable(true)

10. .HeaderTemplate("???");

11. });

Grid

answered on 23 Jun 2015

1 answer

115 views

Selection over a PanelBar

Hi All

I'm trying to start using my license, but I'm doing something wrong for sure.

I copy to my page of a project that is working, the following script from a new project create thru template Telerik \Web\c# ASP.NET MVC Application, from Index.cshtml. (@(Html.Kendo().PanelBar()..."

But I don't have any change, I move the mouse over the bar, and I saw the new bar, but nothing happen when I click over that position.

I suppose is missing some bundles, but I don't know what js is missing.

In the new project everything works well, but not in my.

Any clue what I must do?

Paulo Afonso

PanelBar

answered on 23 Jun 2015

6 answers

741 views

Using a DisplayTemplate

Hi everyone,

I have a grid in batch edit mode. When a cell gets in edit-mode it uses (if specified) its EditorTemplate. My question now is, if I am also able to somehow use a DisplayTemplate for the time the cells are in display-mode?

I have a property with an UIHint on the template I wanna use. The problem is, he only uses the EditorTemplate in edit-mode, but not the DisplayTemplate in display-mode. Is there any possibility of doing this? I know that I can use the .ClientTemplate property on the columns. But I wanna use intellisense, and I need to implement a hole bunch of JavaScript-Methods.

Hope there is a way and someone can show it to me :)

The funny thing is: when the grid is loaded he calls the DisplayTemplate once (actually the grid needs it! Without a DisplayTemplate with the same name as the EditorTemplate nothing works!)

best regards, Mathias

Grid

answered on 23 Jun 2015

1 answer

43 views

MVC Grid not accessible after AJAX HTML response added to DOM

Hi,

I am using the ASP.NET MVC Grid control on a page. The functionality is to fire a AJAX query when a Grid row is selected. The AJAX query calls the MVC Controller and gets a response HTML.

The response HTML is a Tab Strip with 4 tabs , all of them are empty except for one which shows a hierarchy (built using <ul> and <li> tags).

Scenario,

When Grid loads, it gets the data from one of the MVC controllers
When a row is selected, the "onChange" event fires and a AJAX call pulls the HTML response with the Tabstrip
Once the AJAX response comes back, it is added to the DOM using $('#DrillDown').html(data)

Issue

Once the AJAX response is added to the DOM, the GriD is no longer accessible. None of the rows are selectable anymore, the below line returns null

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

Any help appreciated.

-Harris

Grid

answered on 22 Jun 2015

1 answer

145 views

MultiSelectFor - javascript error when deleting selected item

Hi there,

I am using the MultiSelectFor control bound to a model property in a MVC 5 razor webpage. I am able to select multiple items and create data in our backend system - however, I am running into a few problems when editing this data.

Model property:

[DataType("MultiSelect")]

[Required]

public List<string> Teams { get; set; }

Editor Template:

@model IList<string>

@Html.Kendo().MultiSelectFor(m => m)

.DataTextField("Text")

.DataValueField("Value")

.Filter("contains")

.AutoClose(false)

.Placeholder("Please Select")

.ValuePrimitive(true)

.Deferred()

.BindTo(selectList)

.ToClientTemplate();

The list it is bound to is an IEnumerable<SelectListItem>

When the screen loads, everything appears fine - the multiselect field is bound to the correct items and displays correctly.

However, if I attempt to remove one of the selected items by clicking on the delete option, I receive a javascript error in kendo.all.min.js:

0x800a138f - JavaScript runtime error: Unable to get property 'top' of undefined or null reference

The multiselect then appears to have lost it's list of values, which will only reappear if I start typing.

Any ideas what could be the issue here? If I expand the list first prior to deleting, I receive no issues when removing a selected item.

Thanks,

Paul.

MultiSelect

answered on 19 Jun 2015

1 answer

461 views

Push realtime data to kendo chart with signalr

I am building an application in ASP.NET MVC where I am building different Kendo charts to show realtime data with SignalR. I am trying to let the Hub push data constantly to the chart. But I only manage to let the chart update its data on page load, not realtime.

<script src="@Url.Content("~/Scripts/jquery.signalR-2.2.0.min.js")"></script>

<script src="@Url.Content("~/signalr/hubs")"></script>

<script>

var hub,

hubStart;

$(function () {

var hubUrl = "http://localhost:52373/signalr/hubs";

var connection = $.hubConnection(hubUrl, { useDefaultPath: false });

hub = connection.createHubProxy("serverHub");

$.connection.hub.logging = true;

hubStart = connection.start();

});

</script>

@(Html.Kendo().Chart<Model.ServerState>()

.Name("server1")

.Title(title => title

.Text("Server 1")

.Color("White")

.Font("25px Arial")

)

.Legend(legend => legend

.Color("Gray")

.Position(ChartLegendPosition.Bottom)

.Font("20px Arial")

)

.ChartArea(chartArea => chartArea

.Background("transparent")

)

.SeriesDefaults(seriesDefaults =>

seriesDefaults.Line().Style(ChartLineStyle.Smooth)

)

.Series(series =>

{

series.Line(model => model.Performance.Memory).Name("Memory");

series.Line(model => model.Performance.Processor).Name("Processor");

})

.CategoryAxis(axis => axis

.Title(categoryTitle => categoryTitle

.Text("Time")

.Font("25px Arial"))

.Color("Gray")

.Labels(labels => labels

.Font("20px Arial"))

.MajorGridLines(lines => lines.Visible(false))

)

.ValueAxis(axis => axis

.Numeric().Labels(labels => labels.Format("{0}%"))

.Line(line => line.Visible(false))

.AxisCrossingValue(-10)

.Color("Gray")

.Labels(labels => labels

.Font("20px Arial"))

)

.Tooltip(tooltip => tooltip

.Visible(true)

.Format("{0}%")

)

.DataSource(source => source

.SignalR()

.AutoSync(true)

.Transport(transport => transport

.Promise("hubStart")

.Hub("hub")

.Client(c => c

.Read("read"))

.Server(server => server

.Read("read")

))

.Schema(schema => schema

.Model(model =>

{

model.Id("Id");

model.Field("Id", typeof(int)).Editable(false);

model.Field("Memory", typeof(float));

model.Field("Processor", typeof(float));

}

)

))

)

//Best case:

public ServerStateEvent Read()

{

//Inside thread which pushes an message containing the object to kendo chart

Clients.All.sendMessage(msg);

}

//Current case, this method has to be called by kendo chart to update its data realtime

public ServerStateEvent Read()

{

//this method gets data and returns it to kendo chart

return msg;

}

What I want is the "best case" where the Hub pushes data with the sendMessage function to kendo. This does not seems possible?

The current case works but only one time, the autoSync in kendo does not help.

Chart

answered on 19 Jun 2015