[Solved] Implemnet own Extension method for GridBuilder

[Pavel Balas]

HI all,

Is it possible to create own extension for MVC Grid? I tried simple code

public static GridBuilder<T> RevereseColumns<T>(this GridBuilder<T> builder) where T : class

{

         var grid = builder.ToComponent();

         grid.Columns.Reverse();

         return builder;

}

but this  ends with error:

An item with the same key has already been added.

Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.

Exception Details: System.ArgumentException: An item with the same key has already been added.

Source Error:

Line 790:@(Html.Telerik().Grid(Model.InternalContractList) Line 791:.Name("gridContractList" + Model.CustomContractStatus) Line 792:.DataKeys(r => r.Add(o => o.ContractId))

Source File: c:\Source Code\essox - akvizice\dev\source\ness.adis.web\Areas\CashLoan\Views\InternalGrid\InternalContractList.cshtml Line: 790

Stack Trace:

[ArgumentException: An item with the same key has already been added.]    System.Collections.Generic.Dictionary`2.Insert(TKey key, TValue value, Boolean add) [phone]    Telerik.Web.Mvc.UI.Grid`1.WriteHtml(HtmlTextWriter writer) in f:\114\Griffin\Trunk Full\Sources\Source\Telerik.Web.Mvc\UI\Grid\Grid.cs:888    Telerik.Web.Mvc.UI.ViewComponentBase.ToHtmlString() in f:\114\Griffin\Trunk Full\Sources\Source\Telerik.Web.Mvc\UI\ViewComponentBase.cs:216    Telerik.Web.Mvc.UI.ViewComponentBuilderBase`2.ToHtmlString() in f:\114\Griffin\Trunk Full\Sources\Source\Telerik.Web.Mvc\UI\ViewComponentBuilderBase.cs:154    Telerik.Web.Mvc.{Dynamic}.GridBuilder`1[[Ness.Adis.Business.Core.Common.Dto.Contract.InternalContract, Ness.Adis.Business.Core.Common, Version=1.0.0.0\, Culture=neutral\, PublicKeyToken=null\]\].IHtmlString.ToHtmlString() +40    System.Web.WebPages.WebPageExecutingBase.WriteTo(TextWriter writer, Object content) +58

 

I simplify example to and the error is the same.

public static GridBuilder<T> RevereseColumns<T>(this GridBuilder<T> builder) where T : class

{

         return builder;

}

 

It seems than when I do not change any builder option, column are added twice. How I can create own extension for Grid?

Thank you.

 

[Pavel Balas]

I realize that this is only a debugger problem. When I deleted breakpoint, this error diapers itself. It seems that some watch caused it.