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1 answer
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I am attempting to invoke the Kendo mvc extensions from an automated test.

It builds fine, but at runtime I get an exception when I invoke Kendo.Mvc.Extensions.QueryableExtensions.ToDataSourceResult(...)

 

DataSourceRequest request = CreateDefaultDataSourceRequest();
var dataSourceResult = widgets.ToDataSourceResult(request);  // Exception thrown here

 

The exception is:

System.IO.FileNotFoundException : Could not load file or assembly 'Microsoft.AspNetCore.Mvc.Abstractions, Version=3.0.0.0, Culture=neutral, PublicKeyToken=adb9793829ddae60'. The system cannot find the file specified.
   at Kendo.Mvc.Extensions.QueryableExtensions.ToDataSourceResult

 

I am running this in both .NET Framework 4.6.2 and .NET Core 3.0. It works fine in .NET Framework, it's just the .NET Core build which fails.

 

Here is the complete .csproj file:

<?xml version="1.0" encoding="utf-8"?>
<Project Sdk="Microsoft.NET.Sdk">
    <PropertyGroup>
        <TargetFrameworks>net462;netcoreapp3.0</TargetFrameworks>
    </PropertyGroup>
 
    <ItemGroup>
      <PackageReference Include="NUnit" Version="3.12.0" />
    </ItemGroup>
    <ItemGroup>
        <ProjectReference Include="..\DATMedia.Core\DATMedia.Core.csproj" />
    </ItemGroup>
 
    <ItemGroup Condition="'$(TargetFramework)' == 'net462'">
        <PackageReference Include="Telerik.UI.for.AspNet.Mvc5" Version="2019.3.1023" />
    </ItemGroup>
 
    <ItemGroup Condition="'$(TargetFramework)' == 'netcoreapp3.0'">
        <PackageReference Include="Telerik.UI.for.AspNet.Core" Version="2019.3.1023" />
    </ItemGroup>
 
    <!-- Some Googling suggested this would help, but nope.-->
    <ItemGroup Condition="'$(TargetFramework)' == 'netcoreapp3.0'">
        <FrameworkReference Include="Microsoft.AspNetCore.App" />
    </ItemGroup>
 
</Project>

 

 

 

 

Plamen
Telerik team
 answered on 09 Dec 2019
3 answers
554 views

I can't find where to indicate the model i.e what's the equavalent of  @(Html.Kendo().Grid<Model> in the TagHelper syntax.

Without the model I can't get intellisense for my grid columns and inferred column names (DataAnnotation) are missing.

 

 

Tsvetomir
Telerik team
 answered on 06 Dec 2019
1 answer
707 views

Can i set a default preset filter value for a grid at runtime? 

I'd like to add a isEqualTo value from jquery or similar

.Filter(f => f.Add(a => a.OperatorID).IsEqualTo( ? ))

Nikolay
Telerik team
 answered on 05 Dec 2019
6 answers
560 views

Hi, 

 

I want to bind a label to a combobox using the tag '<label asp-for="test"></label>'.

I followed the online demo example exactly and it didn't work.

Is this a bug in the code for .NET CORE? 

Petar
Telerik team
 answered on 05 Dec 2019
1 answer
304 views

Hi,

I am using the scheduler but would like to pass the entered values in the scheduler (name, description, etc) to my C# controller, ideally within the kendo code in my view.

 

Could someone advise how to do this? I need to invoke a C# controller method on creation of an appointment.

Ivan Danchev
Telerik team
 answered on 03 Dec 2019
2 answers
300 views

 

I am a complete newbie to Kendo UI. I am trying to follow the getting started exercise https://docs.telerik.com/aspnet-mvc/helpers/data-management/grid/binding/custom-binding

Step 1

public ActionResult Index([DataSourceRequest(Prefix = "Grid")] DataSourceRequest request)

{

    IQueryable<Order> orders = new NorthwindEntities().Orders;

}

It does not recognise Prefix = "Grid".   The type of namespace 'Prefix' could not be found.

I cannot work out what namespace I need to resolve this.

Any help greatly appreciated.

I am using core 2.2 , VS 2017 and Kendo-UI 2019.3.1023

 

 

 

 

 

 

Aleksandar
Telerik team
 answered on 03 Dec 2019
14 answers
199 views

Hello

im trying to apply grouping

Here is my Read method

01.var result = await _helpDeskDbContext.Set<Ticket>()
02.               .Where(a => a.IsDeleted == false && AllowedCats.Contains(a.CategoryIdRef.Value))
03.               .OrderBy(a => a.Status.Sort)
04.               .Select(a => new TicketViewModel
05.           {
06.               Assignee = a.AssigneeUser.FullName,
07.               Category = a.Category.Name,
08.               Code = a.Code,
09.               Project = a.Project.Name,
10.               Id = a.Id,
11.               IsEditable = a.Status.IsEditable,
12.               Priority = a.Priority.Name,
13.               Requester = a.Requester.Name,
14.               RequestedOn = a.CreatedDate.ToString("yyyy/MM/dd hh:mm tt", System.Globalization.CultureInfo.InvariantCulture),
15.               Status = a.Status.Name,
16.               Subject = a.Subject,
17.               StatusCode = a.Status.Code,
18.               PriorityColor = new DataItem { text = a.Priority.ForeColor, value = a.Priority.BackColor },
19.               StatusColor = new DataItem { text = a.Status.ForeColor, value = a.Status.BackColor },
20.               ProjectColor = new DataItem { text = a.Project.ForeColor, value = a.Project.BackColor },
21.               StatusSort = a.Status.Sort
22.           }).ToDataSourceResultAsync(request);

 

and here is my grid configuration

.DataSource(op =>
                                       {
                                           op.Ajax().Model(m => m.Id(x => x.Id)).Group(a => a.Add(s => s.Assignee)).Read(r => r.Action("Read", "Tickets"));
                                       })

 

and the sql command from kestrel 

SELECT [t].[Assignee], [t].[Category], [t].[Code0], [t].[Project], [t].[Id], [t].[IsEditable], [t].[Priority], [t].[Requester], [t].[CreatedDate], [t].[c], [t].[Status], [t].[Subject], [t].[StatusCode], [t].[text], [t].[value], [t].[text0], [t].[value0], [t].[text1], [t].[value1], [t].[StatusSort], [t].[FullName], [t].[Name], [t].[Code], [t].[Name], [t].[IsEditable], [t].[Name], [t].[Name], [t].[Name], [t].[Code], [t].[ForeColor], [t].[BackColor], [t].[ForeColor], [t].[BackColor], [t].[ForeColor], [t].[BackColor], [t].[Sort]
      FROM (
          SELECT [a.AssigneeUser].[FullName] AS [Assignee], [a.Category].[Name] AS [Category], [a].[Code] AS [Code0], [a.Project].[Name] AS [Project], [a].[Id], [a.Status].[IsEditable], [a.Priority].[Name] AS [Priority], [a.Requester].[Name] AS [Requester], [a].[CreatedDate], N'yyyy/MM/dd hh:mm tt' AS [c], [a.Status].[Name] AS [Status], [a].[Subject], [a.Status].[Code] AS [StatusCode], [a.Priority].[ForeColor] AS [text], [a.Priority].[BackColor] AS [value], [a.Status].[ForeColor] AS [text0], [a.Status].[BackColor] AS [value0], [a.Project].[ForeColor] AS [text1], [a.Project].[BackColor] AS [value1], [a.Status].[Sort] AS [StatusSort]
          FROM [HelpDesk].[Tickets] AS [a]
          LEFT JOIN [HelpDesk].[Contacts] AS [a.Requester] ON [a].[RequesterIdRef] = [a.Requester].[Id]
          LEFT JOIN [HelpDesk].[Priorities] AS [a.Priority] ON [a].[PriorityIdRef] = [a.Priority].[Id]
          LEFT JOIN [HelpDesk].[Projects] AS [a.Project] ON [a].[ProjectIdRef] = [a.Project].[Id]
          LEFT JOIN [HelpDesk].[Categories] AS [a.Category] ON [a].[CategoryIdRef] = [a.Category].[Id]
          LEFT JOIN [HelpDesk].[Status] AS [a.Status] ON [a].[StatusIdRef] = [a.Status].[Id]
          LEFT JOIN [dbo].[UserInfos] AS [a.AssigneeUser] ON [a].[AssigneeIdRef] = [a.AssigneeUser].[UserId]
          WHERE ([a].[IsDeleted] = 0) AND COALESCE([a].[CategoryIdRef], 0) IN (3)
          ORDER BY [a.AssigneeUser].[FullName], [a.Status].[Sort]
          OFFSET 0 ROWS FETCH NEXT 10 ROWS ONLY
      ) AS [t]
      ORDER BY [t].[FullName]

 

in the read method gives error 500 and the i looked to my error logs and i found below error 

 

System.Data.SqlClient.SqlException (0x80131904): Invalid column name 'FullName'.
Invalid column name 'Name'.
Invalid column name 'Code'.
Invalid column name 'Name'.
Invalid column name 'Name'.
Invalid column name 'Name'.
Invalid column name 'Name'.
Invalid column name 'Code'.
Invalid column name 'ForeColor'.
Invalid column name 'BackColor'.
Invalid column name 'ForeColor'.
Invalid column name 'BackColor'.
Invalid column name 'ForeColor'.
Invalid column name 'BackColor'.
Invalid column name 'Sort'.
Invalid column name 'FullName'.

 

please i need help.

am i doing something wrong ? or its in Telerik side

Thanx

Ahmed

NoobMaster
Top achievements
Rank 2
Iron
 answered on 03 Dec 2019
1 answer
117 views

my code as blow:

function GridDataSource(gridName,path, readHandler, createHandler, updateHandler,deleteHandler, model) {

            var grid = GetGrid(gridName);
            var urlRead = '@Url.Content("~")' + encodeURI(path + "?handler=" + readHandler );
            var urlCreate = '@Url.Content("~")' + encodeURI(path + "?handler=" + createHandler);
            var urlUpdate = '@Url.Content("~")' + encodeURI(path + "?handler=" + updateHandler);
            var urlDestroy = '@Url.Content("~")' + encodeURI(path + "?handler=" + deleteHandler);


            if (model == null)
                model = { id: "Id" };

            var dataSource = new kendo.data.DataSource({
                type: "aspnetmvc-ajax",
                pageSize: 1000,
                serverPaging: false,
                serverGrouping: false,
                transport: {
                    read: {
                        url: urlRead,
                        data: kendo.antiForgeryTokens(),
                    },
                    create: {
                        url: urlCreate,
                        data: kendo.antiForgeryTokens(),
                        cache: true
                    },
                    update: {
                        url: urlUpdate,
                        data: kendo.antiForgeryTokens(),
                    },
                    destroy: {
                        url: urlDestroy,
                        data: kendo.antiForgeryTokens(),
                        cache: true
                    },
                    parameterMap: function (data, type) {
                        if (type == "create") {
                            // send the created data items as the "models" service parameter encoded in JSON
                            return { models: kendo.stringify(data.models) };
                        }
                    }
                },
                schema: {
                    data: "Data",
                    total: "Total",
                    errors: "Errors",
                    model: model
                }
            });


            grid.bind("dataBound", function () {

                if (grid.dataSource.data().length>0)
                    grid.select("tr:eq(0)");

            });
            grid.setOptions({
                dataSource: dataSource,
                persistSelection: true,
            });

            //grid.setDataSource(dataSource);

        }

 

function BtnAddClientClick(e) {
        var ds = GetGrid("DgClient").dataSource;
        var newRow = kendo.observable({
            Id: Guid(),
            Clientname: "xxxxx",
            Status: "Draft",
            Comments: ""
        });

        var dataItem = ds.insert(0, newRow);
        ds.sync();
    }

 

public ActionResult OnPostAddClient([DataSourceRequest]DataSourceRequest request, Cmclient client)
        {
            var data = Request.Form;
            var id = data["Id"][0];

            return new JsonResult("OK");

            //ds.Cmclient.Add(client);
            //ds.SaveChanges();
            //return new JsonResult(new[] { client }.ToDataSourceResult(request, ModelState));
        }

 

 

not work. why? please help.

Alex Hajigeorgieva
Telerik team
 answered on 03 Dec 2019
1 answer
4.7K+ views

How can I set the background color of a DropDownList's selected value box. Adding the following to the DropDownList html helper code: .ValueTemplate("<div style='background-color:yellow'>#= data.Role #</div> results in just the background of the value text being colored yellow. The background of the entire box not behind the value text remains unchanged.

 

Martin
Telerik team
 answered on 02 Dec 2019
3 answers
917 views

Hello,

can you please provide a Sample for using Partial Razor Pages for Grid Create/Edit actions. I want to use my custom Pages within Modal Popups. Haven't found anything in this direction in the documentation or samples here. 

Really appreciate your help

 

Best regards

Paul

Tsvetomir
Telerik team
 answered on 02 Dec 2019
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