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Parameters and programattic datasource

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Jaymie
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Jaymie asked on 09 Jul 2010, 05:16 PM
I need to create a datasource in code for a parameter.
The issue I have is when I create the parameter, I set the ValueMember and DisplayMember in the designer and then in the code behind I do this:

    Private Sub ChangeoverRunTimeChart_NeedDataSource(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.NeedDataSource
        ReportParameters("WorkCentres").AvailableValues.DataSource = GetWorkCentresForDDL()
        ReportParameters("WorkCentres").AvailableValues.DisplayMember = "WorkCentreCode"
        ReportParameters("WorkCentres").AvailableValues.ValueMember = "ID"
    End Sub

Which is the needdatasource event for the report.
When I load up the report, it just shows an empty textbox for the WorkCentres parameter. I can not get it to show a combobox.
Could someone tell me what I am doing wrong please?

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Steve
Telerik team
answered on 09 Jul 2010, 05:48 PM
Hi Jaymie,

Report parameters typically filter report data that is retrieved from a data source. Thus it is too late to bind them in the NeedDataSource event, which is the last place where you can provide datasource to the report itself. You should move the code in the report constructor instead of NeedDataSource.

Greetings,
Steve
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Jaymie
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answered on 12 Jul 2010, 10:05 PM
thank you very much for this, it has worked perfectly :)
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