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Problems ordering a Grid with an ObservableDictionary as ItemsSource

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Rocio
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Rocio asked on 17 Sep 2012, 07:43 AM
Hello! I am starting to use Telerik controls, and they work really well, but I am stuck with my GridView:

<telerik:RadGridView Name="gridAlarm" AutoGenerateColumns="False" EnableRowVirtualization="True">
                        <telerik:RadGridView.Columns>
                            <telerik:GridViewDataColumn Header="PtNum" DataMemberBinding="{Binding Key}" Width="auto" UniqueName="alarmas"/>
                            <telerik:GridViewDataColumn Header="Timestamp" DataMemberBinding="{Binding Value.Timestamp}"  Width="auto" />
                            <telerik:GridViewDataColumn Header="Description" DataMemberBinding="{Binding Value.Description}"  Width="auto"/>
                            <telerik:GridViewDataColumn Header="Comment" DataMemberBinding="{Binding Value.Comment}"  Width="auto" />
                            <telerik:GridViewDataColumn Header="Point" DataMemberBinding="{Binding Value.Ptname}" Width="auto" />
                            <telerik:GridViewDataColumn Header="RTU" DataMemberBinding="{Binding Value.Rtu}"  Width="auto" />
                            <telerik:GridViewDataColumn Header="Category" DataMemberBinding="{Binding Value.Category}"  Width="auto" />
                            <telerik:GridViewDataColumn Header="Table" DataMemberBinding="{Binding Value.Dbname}"  Width="auto" />
                            <telerik:GridViewDataColumn Header="Field" DataMemberBinding="{Binding Value.Fldname}"  Width="auto" />
                        </telerik:RadGridView.Columns>                       
                    </telerik:RadGridView>

First of all, I am trying to sort it by the first column, with UniqueName="alarmas" when the user clicks in a button:
 
private void radButton1_Click(object sender, RoutedEventArgs e)
        {
            gridAlarm.SortDescriptors.Add(new SortDescriptor()
            {
                Member = "alarmas",
                SortDirection = System.ComponentModel.ListSortDirection.Ascending
            });   
        }
   
And it doesn't work, I am not sure if the Member property should be the UniqueName, or not.

My second trouble is that the itemsSource of my grid is an Observable Dictionary, and when a entry changes, it also changes in the gird ( it works fine) but the changes row goes to the last position, and I would like it to go to the first or to stay in place (ordered by the first column),
When I saw that I could not order the grid by adding a SortDescriptor, I thought about generating the same event that occurs when the user clicks in the row header of a column to order the grid by it's column value, so when the Dictionary changes, I could reorder the grid by executing this event, but I could not find anything about it.

Hope you can help me because it's very important for my project.
Thanks!

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Dimitrina
Telerik team
answered on 17 Sep 2012, 08:08 AM
Hello,

 Could  you please confirm that you can sort clicking on the column's header? 

All the best,
Didie
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Rocio
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answered on 17 Sep 2012, 08:23 AM
Yes, the grid gets reordered when I click on the column header.
Thanks!
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Dimitrina
Telerik team
answered on 17 Sep 2012, 08:25 AM
Hi,

You can then add a ColumnSortDescriptor as explained in this help article.

I hope this helps.

Kind regards,
Didie
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Rocio
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answered on 17 Sep 2012, 08:30 AM
I canĀ“t see anything on that page, it's all black, I have tried before on other computers and with firefox, IE, safari and chrome, and I wasn't able to see it, could you please paste the code here?
Thanks!
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Rocio
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answered on 17 Sep 2012, 09:48 AM
Hello! I found an example with a ColumnDescriptor, and it totally worked:

gridAlarm.SortDescriptors.Clear();
            ColumnSortDescriptor csd = new ColumnSortDescriptor()
            {
                Column = this.gridAlarm.Columns["PtNum"],
                SortDirection = ListSortDirection.Ascending
            };
            this.gridAlarm.SortDescriptors.Add(csd);
 Where PtNum is the UniqueName of my column.
Thank you very much!!
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Dimitrina
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