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Viewmodel property can't be named Model?

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Grid

This is a migrated thread and some comments may be shown as answers.

Rami asked on 22 May 2018, 04:50 AM

Hello,

I ran into a problem with the Grid when starting a new project. It seems that a viewmodel can't contain a property named Model? If I have a viewmodel as such:

using System.ComponentModel.DataAnnotations;

namespace Lainalista.Models {

public class ToolViewModel {

public int ID { get; set; }

[MaxLength(100)]

public string Make { get; set; }

[MaxLength(100)]

public string Model { get; set; }

}

And then a Grid definition in a .cshtml file like this:

@(Html.Kendo().Grid<ToolViewModel>(new List<ToolViewModel>() { new ToolViewModel() { ID = 1, Make = "Makita" } })

.Name("toolsGrid")

.Columns(columns => {

columns.AutoGenerate(true);

})

.ToolBar(toolbar => toolbar.Create())

.DataSource(dataSource => dataSource

.Ajax()

.Model(model => model.Id(p => p.ID))

.Create(update => update.Action("EditingInline_Create", "Grid"))

.Read(read => read.Action("EditingInline_Read", "Grid"))

.Update(update => update.Action("EditingInline_Update", "Grid"))

.Destroy(update => update.Action("EditingInline_Destroy", "Grid"))

)

Then I get an error and the page load is aborted:

Microsoft.AspNetCore.Diagnostics.DeveloperExceptionPageMiddleware:Error: An unhandled exception has occurred while executing the request

System.ArgumentException: The name of an HTML field cannot be null or empty. Instead use methods Microsoft.AspNetCore.Mvc.Rendering.IHtmlHelper.Editor or Microsoft.AspNetCore.Mvc.Rendering.IHtmlHelper`1.EditorFor with a non-empty htmlFieldName argument value.

Parameter name: expression

at Microsoft.AspNetCore.Mvc.ViewFeatures.DefaultHtmlGenerator.GenerateInput(ViewContext viewContext, InputType inputType, ModelExplorer modelExplorer, String expression, Object value, Boolean useViewData, Boolean isChecked, Boolean setId, Boolean isExplicitValue, String format, IDictionary`2 htmlAttributes)

at Microsoft.AspNetCore.Mvc.ViewFeatures.DefaultHtmlGenerator.GenerateTextBox(ViewContext viewContext, ModelExplorer modelExplorer, String expression, Object value, String format, Object htmlAttributes)

at Microsoft.AspNetCore.Mvc.ViewFeatures.HtmlHelper.GenerateTextBox(ModelExplorer modelExplorer, String expression, Object value, String format, Object htmlAttributes)

at Microsoft.AspNetCore.Mvc.ViewFeatures.HtmlHelper.TextBox(String expression, Object value, String format, Object htmlAttributes)

at Microsoft.AspNetCore.Mvc.ViewFeatures.Internal.DefaultEditorTemplates.GenerateTextBox(IHtmlHelper htmlHelper, String inputType)

at Microsoft.AspNetCore.Mvc.ViewFeatures.Internal.DefaultEditorTemplates.StringTemplate(IHtmlHelper htmlHelper)

at Microsoft.AspNetCore.Mvc.ViewFeatures.Internal.TemplateRenderer.Render()

at Microsoft.AspNetCore.Mvc.ViewFeatures.Internal.TemplateBuilder.Build()

at Microsoft.AspNetCore.Mvc.ViewFeatures.HtmlHelper.GenerateEditor(ModelExplorer modelExplorer, String htmlFieldName, String templateName, Object additionalViewData)

at Microsoft.AspNetCore.Mvc.ViewFeatures.HtmlHelper.Editor(String expression, String templateName, String htmlFieldName, Object additionalViewData)

at Microsoft.AspNetCore.Mvc.Rendering.HtmlHelperEditorExtensions.Editor(IHtmlHelper htmlHelper, String expression, String templateName, Object additionalViewData)

at Kendo.Mvc.UI.GridBoundColumn`2.GetEditor(IHtmlHelper helper, HtmlEncoder encoder)

at Kendo.Mvc.UI.Grid`1.<>c__DisplayClass66_1.<InitializeEditors>b__2(IGridBoundColumn column)

at Kendo.Mvc.Extensions.EnumerableExtensions.Each[T](IEnumerable`1 instance, Action`1 action)

at Kendo.Mvc.UI.Grid`1.ProcessSettings()

at Kendo.Mvc.UI.WidgetBase.RenderHtml(TextWriter writer)

at Kendo.Mvc.UI.WidgetBase.ToHtmlString()

at Kendo.Mvc.UI.Fluent.WidgetBuilderBase`2.WriteTo(TextWriter writer, HtmlEncoder encoder)

at Microsoft.AspNetCore.Mvc.ViewFeatures.Internal.ViewBuffer.<WriteToAsync>d__22.MoveNext()

--- End of stack trace from previous location where exception was thrown ---

at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()

at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)

at Microsoft.AspNetCore.Mvc.Razor.RazorView.<RenderLayoutAsync>d__18.MoveNext()

--- End of stack trace from previous location where exception was thrown ---

at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()

at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)

at Microsoft.AspNetCore.Mvc.Razor.RazorView.<RenderAsync>d__14.MoveNext()

--- End of stack trace from previous location where exception was thrown ---

at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()

at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)

at Microsoft.AspNetCore.Mvc.ViewFeatures.ViewExecutor.<ExecuteAsync>d__22.MoveNext()

--- End of stack trace from previous location where exception was thrown ---

at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()

at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)

at Microsoft.AspNetCore.Mvc.ViewFeatures.ViewExecutor.<ExecuteAsync>d__21.MoveNext()

--- End of stack trace from previous location where exception was thrown ---

at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()

at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)

at Microsoft.AspNetCore.Mvc.ViewResult.<ExecuteResultAsync>d__26.MoveNext()

--- End of stack trace from previous location where exception was thrown ---

at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()

at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)

at Microsoft.AspNetCore.Mvc.Internal.ResourceInvoker.<InvokeResultAsync>d__19.MoveNext()

--- End of stack trace from previous location where exception was thrown ---

at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()

at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)

at Microsoft.AspNetCore.Mvc.Internal.ResourceInvoker.<InvokeNextResultFilterAsync>d__24.MoveNext()

--- End of stack trace from previous location where exception was thrown ---

at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()

at Microsoft.AspNetCore.Mvc.Internal.ResourceInvoker.Rethrow(ResultExecutedContext context)

at Microsoft.AspNetCore.Mvc.Internal.ResourceInvoker.Next(State& next, Scope& scope, Object& state, Boolean& isCompleted)

at Microsoft.AspNetCore.Mvc.Internal.ResourceInvoker.<InvokeNextResourceFilter>d__22.MoveNext()

--- End of stack trace from previous location where exception was thrown ---

at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()

at Microsoft.AspNetCore.Mvc.Internal.ResourceInvoker.Rethrow(ResourceExecutedContext context)

at Microsoft.AspNetCore.Mvc.Internal.ResourceInvoker.Next(State& next, Scope& scope, Object& state, Boolean& isCompleted)

at Microsoft.AspNetCore.Mvc.Internal.ResourceInvoker.<InvokeFilterPipelineAsync>d__17.MoveNext()

--- End of stack trace from previous location where exception was thrown ---

at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()

at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)

at Microsoft.AspNetCore.Mvc.Internal.ResourceInvoker.<InvokeAsync>d__15.MoveNext()

--- End of stack trace from previous location where exception was thrown ---

at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()

at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)

at Microsoft.AspNetCore.Builder.RouterMiddleware.<Invoke>d__4.MoveNext()

--- End of stack trace from previous location where exception was thrown ---

at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()

at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)

at Microsoft.AspNetCore.Diagnostics.DeveloperExceptionPageMiddleware.<Invoke>d__7.MoveNext()

Microsoft.AspNetCore.Server.Kestrel:Error: Connection id "0HLDVJR1TO7VG", Request id "0HLDVJR1TO7VG:00000001": An unhandled exception was thrown by the application.

System.ArgumentException: The name of an HTML field cannot be null or empty. Instead use methods Microsoft.AspNetCore.Mvc.Rendering.IHtmlHelper.Editor or Microsoft.AspNetCore.Mvc.Rendering.IHtmlHelper`1.EditorFor with a non-empty htmlFieldName argument value.

Parameter name: expression

at Microsoft.AspNetCore.Mvc.ViewFeatures.DefaultHtmlGenerator.GenerateInput(ViewContext viewContext, InputType inputType, ModelExplorer modelExplorer, String expression, Object value, Boolean useViewData, Boolean isChecked, Boolean setId, Boolean isExplicitValue, String format, IDictionary`2 htmlAttributes)

at Microsoft.AspNetCore.Mvc.ViewFeatures.DefaultHtmlGenerator.GenerateTextBox(ViewContext viewContext, ModelExplorer modelExplorer, String expression, Object value, String format, Object htmlAttributes)

at Microsoft.AspNetCore.Mvc.ViewFeatures.HtmlHelper.GenerateTextBox(ModelExplorer modelExplorer, String expression, Object value, String format, Object htmlAttributes)

at Microsoft.AspNetCore.Mvc.ViewFeatures.HtmlHelper.TextBox(String expression, Object value, String format, Object htmlAttributes)

at Microsoft.AspNetCore.Mvc.ViewFeatures.Internal.DefaultEditorTemplates.GenerateTextBox(IHtmlHelper htmlHelper, String inputType)

at Microsoft.AspNetCore.Mvc.ViewFeatures.Internal.DefaultEditorTemplates.StringTemplate(IHtmlHelper htmlHelper)

at Microsoft.AspNetCore.Mvc.ViewFeatures.Internal.TemplateRenderer.Render()

at Microsoft.AspNetCore.Mvc.ViewFeatures.Internal.TemplateBuilder.Build()

at Microsoft.AspNetCore.Mvc.ViewFeatures.HtmlHelper.GenerateEditor(ModelExplorer modelExplorer, String htmlFieldName, String templateName, Object additionalViewData)

at Microsoft.AspNetCore.Mvc.ViewFeatures.HtmlHelper.Editor(String expression, String templateName, String htmlFieldName, Object additionalViewData)

at Microsoft.AspNetCore.Mvc.Rendering.HtmlHelperEditorExtensions.Editor(IHtmlHelper htmlHelper, String expression, String templateName, Object additionalViewData)