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RadGridView Save/Load UserSettings + MVVM

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GridView

This is a migrated thread and some comments may be shown as answers.

Asela asked on 06 Jan 2011, 05:12 AM

Hi,

My Application follows MVVM and uses RadGridView Heavily, and there is a requirement to Preserve user settings which includes Groupings/Filters applied. There are two issues i'm facing at the moment.
1. I don't see a way of preserving Filters/Groupings while following MVVM
2. even if I forget about MVVM and follow the example provided still the Filters are not getting saved. Column Indexes, Column widths seems to be getting saved without a problem but it seems like there is an issue with preserving filters.

Note: I'm using the version 2010.3.1110.40, with .NET framework 4.0, on Windows 7.0

Could you please confirm if there is a known issue in preserving filter settings in the version above, and if not; also let me know if theres way of doing the same while follwing MVVM.

Appriciate a quick response as we have to finalize the requiments in comming week.

Thanx
Asela

22 Answers, 1 is accepted

answered on 06 Jan 2011, 11:21 PM

<telerik:RadGridView HorizontalAlignment="Left" x:Name="grdResourceList" Width="1000" VerticalAlignment="Stretch"

ItemsSource="{Binding Path=Resources, ValidatesOnDataErrors=True, UpdateSourceTrigger=PropertyChanged}"

SelectionMode="Single" SelectedItem="{Binding Path=SelectedResource}" AutoGenerateColumns="False"

local:CommandBehavior.Event="SelectionChanged"

local:CommandBehavior.Command="{Binding EditCommand}"

local:CommandBehavior.CommandParameter="SelectionChanged" IsReadOnly="True" CanUserFreezeColumns="False" >

<telerik:RadGridView.Columns>

<telerik:GridViewDataColumn Header="Resource Code" DataMemberBinding="{Binding Path=ResourceCode}" Width="200"/>

<telerik:GridViewDataColumn Header="Resource Name" DataMemberBinding="{Binding Path=ResourceName}" Width="400"/>

<telerik:GridViewDataColumn Header="Is Active" DataMemberBinding="{Binding Path=IsActive}"/>

<telerik:GridViewDataColumn Header="Resource Category" DataMemberBinding="{Binding Path=ResourceCategory.ResourceCategoryName}"/>

</telerik:RadGridView.Columns>

</telerik:RadGridView>

Well no i didn't do anything [Grid xaml markup included above], i have included just what i got from the demos, infact like i said if I adjust column width, column index [change the order of the columns] the settings are saved, its the groupings and filters that aren't getting saved. So I assume that i have done everything right since the column width / ordering seems to be getting saved.

Also please answer my other question as well, isn't there a way of saving the layout while following MVVM pattern, your example requires code inside the code behind.

Please let me know if you require any further information.

Asela

answered on 07 Jan 2011, 04:05 PM

SaveAndLoadSettings_WPF_Q3.zip

Hi Asela,

You may find the sample project I mentioned attached in this post.

All the best,
Maya
the Telerik team

Browse the videos here>> to help you get started with RadControls for WPF

answered on 10 Jan 2011, 12:54 AM

Thanx Maya for the replies, your example works, but don't you still need to pass reference of the grid to the constructor of the RadGridViewSettings class.

void MainWindow_Loaded(object sender, RoutedEventArgs e)
{
    settings = new RadGridViewSettings(this.playersGrid);
    settings.LoadState();
}

well i know how to attach a custom behaviour to loading and unloading event; but what i want know is how to pass a reference to the grid without using the codebehind.

For an exaple in your MainWindow.xaml.cs you have MainWindow_Loaded, Button1_Click, Button2_Click methods; I can get rid of all three methods, and bind em to command propertise in the viewmodel, but my question is how do you pass a refernece to the this.playersGrid to viewModel.

Lets say i have moved the windowloaded method to the view model.
public ICommand MainWindow_Loaded()
{
    settings = new RadGridViewSettings(this.playersGrid);
// I cant say this.playersGrid, how do you refer the grid?? cos view model doesn't know anything about it.
}

Hope this is clear enough.

Thanx
Asela

answered on 13 Jan 2011, 07:03 AM

Hi Maya,

Managed to preserve filter settings without violating MVVM, however there seems to be a problem with the RadGridViewSettings class. It crashes if there is a column, that this not databound e.g "select" column with a check box. I replaced the commented block with the one below and now it working without a problem; SaveState also needs to be changed to include the null checks.

Thanx
Asela

// LoadState()

// GridViewDataColumn matchingColumn =

// (from column in grid.Columns.OfType<GridViewDataColumn>()

// where column.DataMemberBinding.Path.Path == currentSetting.PropertyName

// select column).FirstOrDefault();

GridViewDataColumn matchingColumn = matchingColumns.Where<GridViewDataColumn>

(x => x.DataMemberBinding.Path.Path == currentSetting.PropertyName).FirstOrDefault();

answered on 05 May 2018, 10:06 AM

Hi Vladimir,

I am using your RadGridView in my MVVM project and I use the persistance framework for loading and saving the settings of the grid. In your demo you use two buttons for saving and loading the settings and the OnClick-routines have access to the grid. To remove this non MVVM-style solution of loading and storing I want to develop a Behavior that loads and saves the settings.

For loading I use the "Loaded"-event. When this is fired I load all the settings. This seems to work.

But which event(s) can I use to store the settings? Call "save" in the events for arranging columns, sorting colums, defining filters, ... might be very inefficient. Could you please help me.

Regards

Marcus

answered on 09 May 2018, 02:22 PM

Hello Marcus,

Perhaps I am missing something, but you should be able to save the custom settings in the Unloaded event of the RadGridView. Can you give this approach a try and let me know if it is suitable for your scenario?

Should you need any further assistance, may I ask you to provide some more details about the specific scenario and why handling the Unloaded method is not applicable? You can also open a new support ticket and describe the scenario in more detail.

Regards,
Vladimir Stoyanov
Progress Telerik

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answered on 15 Mar 2021, 11:48 AM

GridViewSerializationTest.zip

Hello Tobias,

Thank you for the provided information.

While it is difficult to suggest a concrete approach without being able to test the scenario on my end, you can try out a different event for saving the settings (for example the Closing event of the Window). I am attaching a sample project, where I used this approach for your reference. Do check it out and let me know, if it helps.

Should you need any further assistance, can you modify the sample project in order to demonstrate your scenario? Note, that you can send it back in a new support ticket (since projects cannot be attached to forum posts) or let me know what I need to modify in the project in order to replicate the setup on your end. This will hopefully allow me to get a better understanding of the scenario and further assist you.

Regards,
Vladimir Stoyanov
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answered on 15 Mar 2021, 02:45 PM

Hello Vladimir,

thanks for the provided example.

Unfortunately, that is not what I am looking for. My GridView is situated inside a UserControl, which is loaded/unloaded numberless times during the runtime of the program. So I am using the Unloaded-Event of the UserControl or GridView (both with the same issue) to store my settings. I cannot use the Closing event of the MainWindow at this point.

Can you relate to that?

regards,

Tobias

answered on 18 Mar 2021, 10:12 AM

Hello Tobias,

Thank you for the update.

What comes to mind is using the different data events for the settings that you want to save. For example for the sorting - this would be the Sorted event. You can also handle the Grouped and Filtered events. You can execute the saving inside the different events to make sure that the settings that you want to preserve are still available.

Alternatively, if you are manually unloading the control in code, you can execute the saving before that.

Hope you find this helpful.

Regards,
Vladimir Stoyanov
Progress Telerik