[Solved] Sortdescriptor clears

[syed]

Hi All,

One of the feature of sorting the telerikgridview as written in the help manuals is as follows:

"By clicking again on the header the sort direction is changed to descending and on the next click the sorting is cleared. The header goes into his normal state and the arrow disappears."

I don't want the sortdescriptor to get clear no matter how many times the user click on the sort column. My application is being developed in MVVM so i can't use the codebehind to track the last column. This is the default behaviour and i really want it to be overridden or configured not to be applied. If a user clicks a column it gets sorted ascendingly on the third click i again want it to be seen ascendingly and the sortdecriptor to preserve itself. The native silverlight grid doesnot remove the sort descriptor on the third time click of the same column

Looking forward urgently!
Thanks

[Pavel Pavlov]

Hi syed,

You just need to handle the sorting event of RadGridView. Within the event handler you will need to tell the grid that the new state is Ascending instead of None.
This is demosntrated on the code bellow.

public MainPage()
        {
            InitializeComponent();

            this.RadGridView1.Sorting += new EventHandler<Telerik.Windows.Controls.GridViewSortingEventArgs>(RadGridView1_Sorting);
        }

        void RadGridView1_Sorting(object sender, Telerik.Windows.Controls.GridViewSortingEventArgs e)
        {
            if (e.NewSortingState == Telerik.Windows.Controls.SortingState.None)
            {
                e.NewSortingState = Telerik.Windows.Controls.SortingState.Ascending;
            }
        }

Kind regards,
Pavel Pavlov
the Telerik team

[syed]

Hi Pavel Pavlov ,
Thanks for the response. As i've mentioned i'm following MVVM so is there anyway i can pass this eventargs to my command written in View Model. I can pass grid as object by the following code

<telerikGridView:RadGridView IsReadOnly="True" ShowGroupPanel="False" Name="RadGridView"
                    IsFilteringAllowed="False"
                                                        SelectionMode="Single"
                    ItemsSource="{Binding GridResults, Mode=TwoWay}" AutoGenerateColumns="False"
                                                        CommandExtension:RadGridSorting.Command="{Binding GridSortingCommand}"
                    CommandExtension:RadGridSorting.CommandParameter="{Binding ElementName=RadGridView}"
                  SelectedResultGridRow,Mode=TwoWay}"


                             >

CommandExtension:RadGridSorting.Command="{Binding GridSortingCommand}"

                    CommandExtension:RadGridSorting.CommandParameter="{Binding ElementName=RadGridView}"

Need to pass the eventargs as command parameter  to follow your advice.

Looking forward

[Pavel Pavlov]

Hi syed,

I am afraid that there is no other way except writing some code in the event handler. I believe this does not harm the MVVM pattern or any other aspect of the application.

Kind regards,
Pavel Pavlov
the Telerik team