This problem is not caused by the cache problem.

The “Refresh” button in our UXGridView sample or project template is not bind to any command (refresh command) yet. You can try to add your own command that will, for example, clear the cached data and then reload the data.

Hope this helps.

Hi Yudi

Yes, I have seen that UXGridView refresh command is not bind. But if I click on refreshbutton, a request is running (see my first post). Can I not use this query directly? Run the query twice after?

Regards

Michael

Apologize for lack of understanding about the required scenario.
Could you please kindly add more detail about the terms “Can I not use this query directly? Run the query twice after?”

Hi Yudi

<Intersoft:UXStatusBarItem>
    <Intersoft:UXFlatButton Command="core:DataViewCommands.Refresh" Icon="/Intersoft.Client.UI.Data;component/Resources/refresh.png" Style="{StaticResource CommandButtonStyle}"/>
</Intersoft:UXStatusBarItem>

Following section shows the steps to bind the refresh button to a command that will refresh data and clear the cache. Specifically the “clear cache” mechanism is done by clearing the contents of entity set.

Note: the step-by-step made based on the “Intersoft ClientUI MVVM Data Application (WCF RIA SP1).

1. Open Products.xaml file in Expression Blend to edit the template of “Refresh Button”.
2. Create a copy of template and find the “Refresh” UXFlatButton.

<Intersoft:UXStatusBarItem>
    <Intersoft:UXFlatButton Command="core:DataViewCommands.Refresh"
                            Icon="/Intersoft.Client.UI.Data;component/Resources/refresh.png"
                            Style="{StaticResource CommandButtonStyle}"/>
</Intersoft:UXStatusBarItem>

3. Modify and set the Command property as shown in the following code.

<Intersoft:UXStatusBarItem>
    <Intersoft:UXFlatButton Command="{Binding RefreshCommand}"
                            Icon="/Intersoft.Client.UI.Data;component/Resources/refresh.png"
                            Style="{StaticResource CommandButtonStyle}"/>
</Intersoft:UXStatusBarItem>

4. Open “\ViewModels.Infrastructure\EditableGridViewModelGenericBase.cs” and define “RefreshCommand” as delegated method.

#region Commands

...

/// <summary>
/// Gets or sets a <see cref="DelegateCommand"/> to handle refresh operation.
/// </summary>
public DelegateCommand RefreshCommand { get; set; }

#endregion

5. Create the method that will be triggered when “Refresh” button is clicked.

#region Methods

...

private void ExecuteRefresh(object parameter)
{
    this.DataSource.Context.EntityContainer.Clear();
    this.LoadData();
}

#endregion

6. In the constructor, set a DelegateCommand to handle refresh operation. After this step, the constructor should look like following.

#region Constructor

/// <summary>
/// Initializes a new instance of the <see cref="EditableGridViewModelBase"/> class.
/// </summary>
public EditableGridViewModelBase()
    : base()
{
    ...
    this.RefreshCommand = new DelegateCommand(ExecuteRefresh);
}

#endregion

7. Open “\ModelServices.Infrastructure\IDataRepository.cs” class and add the following line to the IDataRepository interface.

public interface IDataRepository
{
    ...

    DomainContext Context { get; }
}

8. Save all the changes and build the project.

I have tested this approach on my local end. Please kindly let me know if you find any difficulties to implement this. I’d be glad to send you a working sample.

Thank you and have a nice day.

Hi Yudi

Thanks for excellent support!

I have skipped the first three steps, because I've bound the command directly to the UXGridView (see last line of code). It works fine.

<Intersoft:UXGridView Intersoft:DockPanel.IsFillElement="True" AutoGenerateColumns="False"
    Style="{StaticResource UXGridViewStyle}"
    IsBusy="{Binding IsBusy, Mode=TwoWay}" 
    IsRefreshed="{Binding IsRefreshed, Mode=TwoWay}"
    SortDescriptors="{Binding QueryDescriptor.SortDescriptors, Mode=TwoWay}"
    PageDescriptor="{Binding QueryDescriptor.PageDescriptor}"
    FilterDescriptors="{Binding QueryDescriptor.FilterDescriptors, Mode=TwoWay}"
    PageSize="{Binding ElementName=PageSize, Path=Text}"
    ItemsSource="{Binding Path=Items}"
    SelectedItem="{Binding SelectedItem, Mode=TwoWay}"
    NewItem="{Binding NewItem, Mode=TwoWay}"
    HasChanges="{Binding HasChanges}"
    AutoEditOperation="{Binding AutoEditOperation}" 
    PrepareNewRowCommand="{Binding PrepareNewRowCommand}"
    ValidateRowCommand="{Binding ValidateRowCommand}" 
    InsertRowCommand="{Binding InsertRowCommand}"
    DeleteRowCommand="{Binding DeleteRowCommand}" 
    UpdateCellCommand="{Binding UpdateCellCommand}" 
    UpdateRowCommand="{Binding UpdateRowCommand}"
    SaveChangesCommand="{Binding SaveChangesCommand}" 
    RejectRowCommand="{Binding RejectRowCommand}"
    RejectChangesCommand="{Binding RejectChangesCommand}"
    RefreshCommand="{Binding RefreshCommand}">

Regards

Michael