How to store list view filters in model differences in blazor

Thanks for the answer. Can we wait new xaf grid till the end of year?

Hello Andrey,

I am afraid that the next release (v21.2) will unlikely include a List Editor with DxGrid. You can implement a custom List Editor, as described at How to: Use a Custom Component to Implement List Editor (Blazor).

Hello again
How can I achieve to store/restore filters with new DxGrid?

Hello Andrey,

This functionality is not implemented in DxGridListEditor yet. If this is urgent, the current DxGridListEditor API is already sufficient to implement it on your side. Here is a simplified example:

C#
using DevExpress.ExpressApp;
using DevExpress.ExpressApp.Blazor.Editors;
using DevExpress.ExpressApp.Blazor.Editors.Models;
using DevExpress.ExpressApp.Model;
using MainDemo.Module.BusinessObjects;
using Microsoft.AspNetCore.Components;
using System;
using System.Linq;

namespace MainDemo.Module.Blazor {
    public partial class MainDemoBlazorModule : ModuleBase {
        ...
        public override void ExtendModelInterfaces(ModelInterfaceExtenders extenders) {
            base.ExtendModelInterfaces(extenders);
            extenders.Add(typeof(IModelColumn), typeof(IModelColumnWithFilter));
        }
    }
    public interface IModelColumnWithFilter : IModelColumn {
        string Filter { get; set; }
    }
    public class BlazorViewController1 : ObjectViewController<ListView, DemoTask> {
        protected override void OnViewControlsCreated() {
            base.OnViewControlsCreated();
            DxGridListEditor gridListEditor = View.Editor as DxGridListEditor;
            if (gridListEditor != null) {
                string propertyName = nameof(DemoTask.Subject);
                DxGridDataColumnModel model = gridListEditor.GetGridAdapter().GridDataColumnModels.FirstOrDefault(c => c.FieldName == propertyName);
                IModelColumnWithFilter modelColumn = ((IModelColumnWithFilter)View.Model.Columns.FirstOrDefault(c => c.PropertyName == propertyName));
                model.FilterRowValue = modelColumn.Filter;
                model.FilterRowOperatorType = DevExpress.Blazor.GridFilterRowOperatorType.Contains;
                model.FilterRowValueChanged = EventCallback.Factory.Create<object>(this, (filterValue) => {
                    modelColumn.Filter = (String)filterValue;
                });
            }
        }
    }
}

Note that DxGridListEditor is in CTP, and we may change this API and behavior in the future. So, I recommend that you wait for an official update with this feature. We will let you know when it is ready.

See Also

Enable the DxGridListEditor

Thanks, it works.
And yes, this is urgent, because it is very inconvenient to lose all the filters after open and close a detail view.

Hello,

As far as I understand, you accomplished your task. If I am mistaken and you need further assistance, please reactivate this thread.

Thanks,
Andrey