Cannot assign property of a WebControl

Discussion in 'ASP .Net' started by Frédéric Mayot, Aug 8, 2004.

  1. Hi,

    I have a strange behavior with a webcontrol. It seems that under some
    conditions, it's not possible to assign a value to a property.
    theControl is a ListBox

    theControl.DataSource = someTable
    theControl.SelectedValue = "1" ' this value belongs to someTable

    The property SelectedValue does not change. Can you see why ?

    Frédéric Mayot, Aug 8, 2004
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  2. SelectedValue selects the item with the given value. Before you do the
    DataBind, the list control has no items to select. Try doing the DataBind
    John Saunders, Aug 8, 2004
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  3. In ASP.NET applications, until you do not call the DataBind method in a web control the items are not created (even if you have set the DataSource propoerty). Once you call this method you can reference any item since they have already been created.

    Alan Ferrandiz
    MCDBA, MCT, MSF Practitioner
    Alan Ferrandiz [MCT], Aug 8, 2004
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