The new FilterMenu/Clear does not fire Filter event

[glut]

Hi,

Thanks for adding the Clear menu item to the filter menu. I have a custom filter that uses the filter button. All menu items (changing the operator) fire Filter event and I can update my model to save filter state for navigating to and from the page. But Clear does not fire Filter event so I cannot take action and clear my filter.

Could you please add the logic to fire Filter on Clear (I think it makes sense, since the filter value changed?).

<FilterTemplate>
    <EditTags @ref="refTagsFilter" Tags="Model.TagsFilterValue" TagsUpdated="ReloadGridAsync"></EditTags>    
    <RadzenDataGridFilterMenu Column="refTagsFilterColumn" Grid="refGrid" TItem="Transaction" />
</FilterTemplate>

I also tried to integrate my filter more closely with DataGrid so that I can bind to FilterValue instead of my Model property but for now I am confused why you have FilterValue and filterValue and similarly for other filter properties. Thanks!

[enchev]

@glut

I am confused why you have FilterValue and filterValue and similarly for other filter properties

The reason behind this can be found in this thread:

Tab Selected is not correct

I think the Blazor documentation article that I linked explains it very well. It contains an example which uses both Expanded property and private In short Blazor renders components upon change and set the parameter properties. If the component keeps the state it gets overwritten. This bit us hard in the early days. Hence there is Selected and IsSelected. Basically you use either SelectedIndex or the Selected property of a tab (but not both) to set the selected tab (setting Selected overrides S…

Long story short you cannot both bind and change runtime a parameter property in Blazor. Every StateHasChanged() will reset the property to initial state.

@glut

But Clear does not fire Filter event so I cannot take action and clear my filter.

It will be available in our next update.

[glut]

Thanks for explaining. I made another attempt at integrating my filter with FilterValue, and basically now I call grid.OnFilter() via reflection when my filter changes. RadzenDataGrid::OnFilter is protected, do you want to make it public for custom filters?

[glut]

BTW, looks like because my custom filter value is a list, it is picked up by ToFilterString() for the IEnumerable case (radzen-blazor/QueryableExtension.cs at 1b66d6fe4df3355642d7630b5e43311d7c7a9664 · radzenhq/radzen-blazor · GitHub).. But I don't need this for my filter since I am adding my own filtering in LoadData, how can this be avoided?

[enchev]

@glut

looks like because my custom filter value is a list, it is pioycked up by ToFilterString() for the IEnumerable case

It's picked since your list is IEnumerable.

@glut

But I don't need this for my filter since I am adding my own filtering in LoadData, how can this be avoided

It cannot be avoided. If you look at the code the result of ToFilterString() is assigned always to Query.Filter and LoadDataArgs.Filter properties.

[glut]

@enchev

It's picked since your list is IEnumerable.

BTW, in that logic in ToFilterString() in the IEnumerable case you check whether FilterType is IEnumerable, but if neither FilterProperty nor Type is set then you use the type of the Property. So it ends up being a check for whether the Property is IEnumerable and then you do Contains on the Property, which in this case is not a string but IEnumerable. This is some sort of a logic breakdown, whether it's a bug or a feature Thanks!