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Explicit Columns not generated with Asynchronous Binding

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GG
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GG asked on 29 Mar 2009, 03:54 PM
Hello,

It seems to have a bug with async binding and GridView.

Indeed when i create a grid view with synchronous binding like that :

<telerik:RadGridView Margin="5,5,5,5" IsReadOnly="True" AutoGenerateColumns="False" ColumnsWidthMode="Fill" ShowColumnHeaders="True" ShowGroupPanel="True" ItemsSource="{Binding Path=AssetAnalysers}"
                        <telerik:RadGridView.Columns> 
                            <telerik:GridViewDataColumn x:Name="AlertTypeColumn"  HeaderText="Type" UniqueName="Analyser.Name" Width="100"/> 
                            <telerik:GridViewDataColumn x:Name="AlertNameColumn"  HeaderText="Name" UniqueName="AnalysedObjectId"/> 
                            <telerik:GridViewDataColumn x:Name="AlertLevelColumn" HeaderText="Level" UniqueName="Level" Width="100"/> 
                            <telerik:GridViewDataColumn x:Name="AlertMessageColumn" HeaderText="Message" UniqueName="Message"/> 
                        </telerik:RadGridView.Columns> 
                    </telerik:RadGridView> 

Everything works well.

But when i try to make Asynchronous Binding (because the property AssetAnalysers take time to load) like that :

                    <telerik:RadGridView Margin="5,5,5,5" IsReadOnly="True" AutoGenerateColumns="False" ColumnsWidthMode="Fill" ShowColumnHeaders="True" ShowGroupPanel="True" ItemsSource="{Binding Path=AssetAnalysers, IsAsync=true}"
                        <telerik:RadGridView.Columns> 
                            <telerik:GridViewDataColumn x:Name="AlertTypeColumn"  HeaderText="Type" UniqueName="Analyser.Name" Width="100"/> 
                            <telerik:GridViewDataColumn x:Name="AlertNameColumn"  HeaderText="Name" UniqueName="AnalysedObjectId"/> 
                            <telerik:GridViewDataColumn x:Name="AlertLevelColumn" HeaderText="Level" UniqueName="Level" Width="100"/> 
                            <telerik:GridViewDataColumn x:Name="AlertMessageColumn" HeaderText="Message" UniqueName="Message"/> 
                        </telerik:RadGridView.Columns> 
                    </telerik:RadGridView> 

At the first loading the four columns are well generated but when my property AssetAnalysers change (it's a INotifyChangedProperty), the binding seems correct but my columns are not generated. So, the GridView looks like empty (but i have rows).

Where is the problem ?

By the way what's the difference and the correct using of UniqueName, DataMemberBinding and DataMemberPath Properties when you have already a binding on ItemSource.

Thank you in advance for your answer.

G. Moelens





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JDB
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answered on 30 Mar 2009, 06:10 AM
As far as I know, you shouldn't use the IsAsync in the Binding, but set the DataLoadMode to Asynchronous on the RadGridView itself.
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Vlad
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answered on 30 Mar 2009, 10:07 AM
Hello guys,

I just tried to reproduce this issue however everything worked fine on my end - I've attached small demo.

As to the properties we added DataMemberBinding with Q1 and this is the right way to set desired binding for desired grid column - if you prefer you can use UniqueName which is backward compatible with our previous version. DataMemberPath currently is marked as obsolete and we will remove this property for Q2.

Regards,
Vlad
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Ido
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answered on 13 Dec 2013, 04:01 PM
Is this still like that? With 2013.2.724.40 version.
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Vlad
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