HowTo prevent loss of DisplayLayout whent set DataSource = null

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Robert Flügge posted over 16 years ago

We use our own derivation of UltraGrid with a design time layout. After setting the DataSource we watch OnInitializeLayout to prevent overwriting of the design time layout. But when DataSource is set to null, we don't get into this method and therefore we have no possibility to prevent the UltraGrid from clearing the complete layout. We can configure the default band 0 nontheless (add our design time columns) but unfortunately theres no ability to add new bands at runtime. So we can't get back a DisplayLayout with more than one band. Can we set DataSource=null without whiping the complete DisplayLayout similar to SetDataBinding (DataSource, DataMember, HideNewColumns)?

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Offline Robert Flügge posted over 16 years ago in reply to Mark

Hi Mark, thank you for your reply. I saw this post but I guess it's pretty dirty. It would change the expected behaviour of the UltraGrid. Assume one sets DataSource to null and I change this internally. When the one requests DataSource later in the code he expects null but it isn't. I also do not agree with Mike who says, thats a good behaviour. It may be intended by infragistics but not expected by the coder. I can define a layout at design time without any data. But on the other hand this "dataless" layout will be emptied at runtime without data. There should be a property that enables the coder to change this.
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375

Mark posted over 16 years ago

see http://news.infragistics.com/forums/p/8755/34465.aspx - does it help ?
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