Access View's Grid control in ViewModel using POCOViewModel

SachinModh

created 5 years ago

Hello,

I want to access view's grid control or grid control columns in viewModel class. Below Code worked perfect in view's code behind. Please help me to sort out this issue if possible.

Grid.Columns.BeginUpdate();
foreach (var column in Grid.Columns)
{
if (values.Contains(column.FieldName.ToString()))
{
column.Visible = true;
}
else
{
column.Visible = false;
}
}
Grid.Columns.EndUpdate();

Answers

Mikhail Shubin [DevExpress MVP]

created 5 years ago

Hello,

The simplest way to get a View visual element reference is to use Loaded event:

XAML
<dxg:GridControl Loaded="{DXEvent OnLoaded(@Self)}">

Usage in ViewModel:

C#
[Command(false)]
public void OnLoaded(GridControl dxGrid)
{
    dxGrid.Columns.BeginUpdate();

    dxGrid.Columns
        .ForEach(column => column.Visible = values.Contains(column.FieldName));

    dxGrid.Columns.EndUpdate();
}

But this approach breaks the MVVM pattern - a ViewModel should be isolated from a View.
The right way is to use a custom Service.

Thanks,
Mikhail

Comments (1)

SachinModh 5 years ago

Thanks Mikhail, Issue fixed.

Access View's Grid control in ViewModel using POCOViewModel

Answers

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