I am using the Grid control on several different pages within my ASP.NET Core MVC app. All of a sudden on several of them I am running in to some weird issues. I am using Telerik.UI.for.AspNet.Core.Trial 2017.2.621

On page load everything works fine. If I do a POST to submit a search, which reloads the same exact page, I am getting weird server side exceptions. On some pages everything works just fine and the issue doesn't happen. I've compared the ones that work and don't work and can't find any real difference. I've also seen some weird exceptions about parsing strings to numbers.

 

      "exceptions": [
        {
          "id": 26884016,
          "typeName": "System.NullReferenceException",
          "message": "Object reference not set to an instance of an object.",
          "hasFullStack": true,
          "stack": "   at Kendo.Mvc.UI.DataSourceRequestModelBinder.TryGetValue[T](ModelMetadata modelMetadata, IValueProvider valueProvider, String modelName, String key, Action`1 action)\r\n   at Kendo.Mvc.UI.DataSourceRequestModelBinder.CreateDataSourceRequest(ModelMetadata modelMetadata, IValueProvider valueProvider, String modelName)\r\n   at Kendo.Mvc.UI.Grid`1.ProcessDataSource()\r\n   at Kendo.Mvc.UI.Grid`1.ProcessSettings()\r\n   at Kendo.Mvc.UI.WidgetBase.RenderHtml(TextWriter writer)\r\n   at Kendo.Mvc.UI.WidgetBase.ToHtmlString()\r\n   at Kendo.Mvc.UI.Fluent.WidgetBuilderBase`2.WriteTo(TextWriter writer, HtmlEncoder encoder)\r\n   at Microsoft.AspNetCore.Mvc.ViewFeatures.Internal.ViewBuffer.<WriteToAsync>d__22.MoveNext()\r\n--- End of stack trace from previous location where exception was thrown ---\r\n   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()\r\n   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)\r\n   at Microsoft.AspNetCore.Mvc.Razor.RazorView.<RenderLayoutAsync>d__17.MoveNext()\r\n--- End of stack trace from previous location where exception was thrown ---\r\n   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()\r\n   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)\r\n   at Microsoft.AspNetCore.Mvc.Razor.RazorView.<RenderAsync>d__13.MoveNext()\r\n--- End of stack trace from previous location where exception was thrown ---\r\n   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()\r\n   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)\r\n   at Microsoft.AspNetCore.Mvc.ViewFeatures.ViewExecutor.<ExecuteAsync>d__18.MoveNext()\r\n--- End of stack trace from previous location where exception was thrown ---\r\n   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()\r\n   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)\r\n   at Microsoft.AspNetCore.Mvc.ViewResult.<ExecuteResultAsync>d__26.MoveNext()\r\n--- End of stack trace from previous location where exception was thrown ---\r\n   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()\r\n   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)\r\n   at Microsoft.AspNetCore.Mvc.Internal.ControllerActionInvoker.<InvokeResultAsync>d__30.MoveNext()\r\n--- End of stack trace from previous location where exception was thrown ---\r\n   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()\r\n   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)\r\n   at Microsoft.AspNetCore.Mvc.Internal.ControllerActionInvoker.<InvokeNextResultFilterAsync>d__28.MoveNext()\r\n--- End of stack trace from previous location where exception was thrown ---\r\n   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()\r\n   at Microsoft.AspNetCore.Mvc.Internal.ControllerActionInvoker.Rethrow(ResultExecutedContext context)\r\n   at Microsoft.AspNetCore.Mvc.Internal.ControllerActionInvoker.Next(State& next, Scope& scope, Object& state, Boolean& isCompleted)\r\n   at Microsoft.AspNetCore.Mvc.Internal.ControllerActionInvoker.<InvokeNextResourceFilter>d__22.MoveNext()\r\n--- End of stack trace from previous location where exception was thrown ---\r\n   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()\r\n   at Microsoft.AspNetCore.Mvc.Internal.ControllerActionInvoker.Rethrow(ResourceExecutedContext context)\r\n   at Microsoft.AspNetCore.Mvc.Internal.ControllerActionInvoker.Next(State& next, Scope& scope, Object& state, Boolean& isCompleted)\r\n   at Microsoft.AspNetCore.Mvc.Internal.ControllerActionInvoker.<InvokeAsync>d__20.MoveNext()\r\n--- End of stack trace from previous location where exception was thrown ---\r\n   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()\r\n   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)\r\n   at Microsoft.AspNetCore.Builder.RouterMiddleware.<Invoke>d__4.MoveNext()\r\n--- End of stack trace from previous location where exception was thrown ---\r\n   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()\r\n   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)\r\n   at Microsoft.AspNetCore.Authentication.AuthenticationMiddleware`1.<Invoke>d__18.MoveNext()\r\n--- End of stack trace from previous location where exception was thrown ---\r\n   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()\r\n   at Microsoft.AspNetCore.Authentication.AuthenticationMiddleware`1.<Invoke>d__18.MoveNext()\r\n--- End of stack trace from previous location where exception was thrown ---\r\n   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()\r\n   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)\r\n   at Microsoft.AspNetCore.Authentication.AuthenticationMiddleware`1.<Invoke>d__18.MoveNext()\r\n--- End of stack trace from previous location where exception was thrown ---\r\n   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()\r\n   at Microsoft.AspNetCore.Authentication.AuthenticationMiddleware`1.<Invoke>d__18.MoveNext()\r\n--- End of stack trace from previous location where exception was thrown ---\r\n   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()\r\n   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)\r\n   at Microsoft.AspNetCore.Authentication.AuthenticationMiddleware`1.<Invoke>d__18.MoveNext()\r\n--- End of stack trace from previous location where exception was thrown ---\r\n   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()\r\n   at Microsoft.AspNetCore.Authentication.AuthenticationMiddleware`1.<Invoke>d__18.MoveNext()\r\n--- End of stack trace from previous location where exception was thrown ---\r\n   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()\r\n   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)\r\n   at Microsoft.AspNetCore.Authentication.AuthenticationMiddleware`1.<Invoke>d__18.MoveNext()\r\n--- End of stack trace from previous location where exception was thrown ---\r\n   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()\r\n   at Microsoft.AspNetCore.Authentication.AuthenticationMiddleware`1.<Invoke>d__18.MoveNext()\r\n--- End of stack trace from previous location where exception was thrown ---\r\n   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()\r\n   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)\r\n   at Microsoft.AspNetCore.Authentication.AuthenticationMiddleware`1.<Invoke>d__18.MoveNext()\r\n--- End of stack trace from previous location where exception was thrown ---\r\n   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()\r\n   at Microsoft.AspNetCore.Authentication.AuthenticationMiddleware`1.<Invoke>d__18.MoveNext()\r\n--- End of stack trace from previous location where exception was thrown ---\r\n   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()\r\n   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)\r\n   at Microsoft.AspNetCore.Diagnostics.DeveloperExceptionPageMiddleware.<Invoke>d__7.MoveNext()\r\n--- End of stack trace from previous location where exception was thrown ---\r\n   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()\r\n   at Microsoft.AspNetCore.Diagnostics.DeveloperExceptionPageMiddleware.<Invoke>d__7.MoveNext()\r\n--- End of stack trace from previous location where exception was thrown ---\r\n   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()\r\n   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)\r\n   at Microsoft.AspNetCore.Session.SessionMiddleware.<Invoke>d__9.MoveNext()\r\n--- End of stack trace from previous location where exception was thrown ---\r\n   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()\r\n   at Microsoft.AspNetCore.Session.SessionMiddleware.<Invoke>d__9.MoveNext()\r\n--- End of stack trace from previous location where exception was thrown ---\r\n   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()\r\n   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)\r\n   at StackifyMiddleware.RequestTracerMiddleware.<Invoke>d__4.MoveNext()\r\n--- End of stack trace from previous location where exception was thrown ---\r\n   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()\r\n   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)\r\n   at Microsoft.AspNetCore.Server.IISIntegration.IISMiddleware.<Invoke>d__8.MoveNext()\r\n--- End of stack trace from previous location where exception was thrown ---\r\n   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()\r\n   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)\r\n   at Microsoft.AspNetCore.Hosting.Internal.RequestServicesContainerMiddleware.<Invoke>d__3.MoveNext()\r\n--- End of stack trace from previous location where exception was thrown ---\r\n   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()\r\n   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)\r\n   at Microsoft.AspNetCore.Server.Kestrel.Internal.Http.Frame`1.<RequestProcessingAsync>d__2.MoveNext()"
        }
      ]

 

My razor code is simple like this:

@(Html.Kendo().Grid< GSCKeyword.GridRecord>(Model.Records)
      .Name("Grid")
      .Columns(columns =>
      {
          columns.Bound(p => p.Query).Title("Query");
          columns.Bound(p => p.Clicks).Title("Clicks").Format("{0:N0}");
          columns.Bound(p => p.Impressions).Title("Impressions").Format("{0:N0}");
          columns.Bound(p => p.CTR).Title("CTR").Format("{0:#0.#}%").Width(70);
          columns.Bound(p => p.Position).Title("Position").Format("{0:##0.#}").Width(70);
          columns.Bound(p => p.Page).Title("Top Page");
      })
      .Pageable()
      .Sortable()

      .DataSource(dataSource => dataSource
          .Ajax()
          .PageSize(500)
          .ServerOperation(false)
      )
)

 

Hello,

 

Could anybody tell me which version of Telerik.Web.UI.dll FIRST started to use new setting "Telerik.AsyncUpload.ConfigurationEncryptionKey" in the web.config file for extra security for file upload?

Which version was the first to introduce this setting?

 

Thanks

 

I am using the following simple TagHelper:

   <kendo-datepicker name="DatePicker"
                                  for="Date"
                                  style='width: 280px;'>
    </kendo-datepicker> 

It works correctly but compiles with the following warning:

Warning Element 'kendo-datepicker' does not allow content and cannot have separate end tag.

I cannot get rid of the warning, what does it mean and how do I get rid of it?

 

Hi!

We are developing a Grid, and we require having an Editable ListBox in a Cell of a GRID.
I have search for this solution and try coding during a week without success.
My project is ASP.NET Core and MVC tech. I have tried with EditorTemplates and ClientDetailTemplateId without lucky.
Please, is this possible? Has the ListBox a SAVING action? and how can achieve this or similar?
The final requirement is having a Editable List of string items in the databound of the ViewModel.

Thanks in advance!

I have the following data structures in my app:

public class MetricValue
{
    public DateTime TimeStamp { get; set; }
    public double Average
}

public class CustomMetrics
{
    public string ResourceName { get; set; }
    public List<MetricValue> Metrics { get; set; }
}

This is the Action that returns the data for the chart in the razor view:
public async Task<IActionResult> GetAllDatabasesDTUPercentages()
{
    List<CustomMetrics> data = ...

    return Json(data);
}

 

I have been reading through the demos and documentation and samples on Github but I have no idea how to configure the chart in the razor view. Most examples have the data come through the page Model or an object with known properties as series.

The ResourceName should be the series name and I should see a series for each CustomMetrics object in the JSON data.

 

Any help would be appreciated.

Hi,

I'm trying download from nuget telerik core packages but after setup following this instruction: 

http://docs.telerik.com/aspnet-mvc/getting-started/nuget-install#set-up-nuget-package-source

nuget still can't establish connection to telerik.

My licence has expired few days ago but I still can use latest version in new project (i think).

Could you please help me fix the problem? Is way using telerik controls without nuget in existing project.

Thanks

Leszek

Hi, where can I ask the question about Map for ASP.NET Core? There isn`t section for this control in ASP.NET Core Forum...

The only way I have found to specify the editable template of a Grid is by creating a separate view inside Shared/EditorTemplates or Controller/EditorTemplates. However, I would like to generate the views dynamically (based on the permissions of the user). So is there any way that I can specify a custom template in the same view? Can ClientTemplate do that?

The Grid control can already generate a dynamic template for the popup, is there any way to override it's behavior?

I am porting a Silverlight website to HTML5 for my company and we are heavily using Telerik controls, as it's one of the only frameworks that has the richness we had while using Silverlight.  We have had great success as Telerik has had every widget and feature we had in our silver light, so it's been great being able to use a single framework for all of our grid and charting needs.

What I am stuck on right now is creating a grid that has a single column but supports different data types for each row.  For example the column might had a field for floats, a drop down menu, and a field for strings.  In Silverlight this was almost no effort to do.  You could take your class instance and drop it in a grid in XAML and XAML knew all of the data types and made each cell match the type(i.e. and editable string field for a string, a drop down menu for an enum, etc.).

What I am wondering is how to achieve this same functionality in Telerik.  Keep in mind that the data source is not an IEnumerable, it is a very large class instance with hundreds of different data members of differing types(int, float, bool, enum).  I attached a screenshot of what this looks like in silver light.  There are 2 columns in the screenshot, the left is a read-only text field, and the right-side column is where you change the values. 

I'm trying to render a grid on demand in a tab using the nw component views. I have tried the following but non work.