An item with the same key has already been added.

[Gavin]

Hi, I have seen this error in a number of threads on the forum, none of which seem to be caused by the same thing as I am trying. 

 

All it amounts to is using the same 'Id' column in the expressions for both a custom command routing value and the datasource server() model id mapping. I dont really understand why using the id in these two places should cause this problem?

 

            @(Html.Kendo().Grid(Model.DetailRecords).Name("MyGrid")
                .Columns(columns =>
                {
                    columns.Command(commands => commands.Custom("View").Action("Index", "Detail")
                        .DataRouteValues(rv => rv.Add(m => m.Id)));
                    columns.Bound(m => m.Heading);
                })
                .DataSource(ds => ds.Server().Model(model => model.Id(m => m.Id)))
            )

If this is a bug, is there a work around I can use?

 

Thanks,

Gavin

[Konstantin Dikov]

Hello Gavin,

The Id field from the model will be automatically passed as parameter for the custom command, so that is why you are receiving the error message. You can safely remove that field from the DataRouteValues and you will still be to retrieve it.

Hope this helps.


Regards,
Konstantin Dikov
Telerik