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ReportParameter Bind to Enum

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Stuart
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Stuart asked on 05 May 2010, 05:45 PM
Hi,

Is it possible to bind a ReportFilter.In operator's datasource to an Enum? e.g.

parameter.AvailableValues.DataSource = Enum.GetNames(typeof(CompletionStatus));

I am binding to an ICollection of DTO's hence the field value will be an enum. 

I get the following error:

The expression contains object 'CompletionStatus' that is not defined in the current context.



Many thanks

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Hrisi
Telerik team
answered on 10 May 2010, 03:41 PM
Hi Stuart,

Unfortunately the info you have provided is not enough to help us fully understand what you want to achieve. Data binding to objects is documented in ObjectDataSource Component help section. In order to use Enum for datasource you can convert it to supported object types.

In your case Enum.GetNames(typeof(CompletionStatus)) will return array strin[], which is a supported type. Items in the array can be accessed in the expressions in this manner: =Fields.Item.

To clarify our understanding of the problem, please preview the attached example report. The report DataSource uses a ObjectDataSource and the filter uses In operator.

Kind regards,
Hrisi
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Stuart
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answered on 10 May 2010, 11:14 PM
Thanks, that really helped.

I had originally started using some EnumWrapper class but actually this works for me:

            this.ReportParameters["MyParam"].AvailableValues.DataSource = Enum.GetNames(typeof (MyEnum));
            this.ReportParameters["MyParam"].AvailableValues.ValueMember = "= Fields.Item";
            this.ReportParameters["MyParam"].AvailableValues.DisplayMember = "= Fields.Item";

Where the Filter is defined as:

this.Filters.AddRange(new Telerik.Reporting.Data.Filter[] {
            new Telerik.Reporting.Data.Filter("=Fields.Property3.ToString()", Telerik.Reporting.Data.FilterOperator.In, "=Parameters.MyParam.Value")});

Obviously here I am filtering by the name of the Enum but that is fine for this scenario
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