DxFormLayoutGroup.ExpandedChanged Event

Fires when a Form Layout group expands or collapses.

Namespace: DevExpress.Blazor

Assembly: DevExpress.Blazor.v24.2.dll

NuGet Package: DevExpress.Blazor

Declaration

[Parameter]
public EventCallback<bool> ExpandedChanged { get; set; }

Parameters

Type	Description
Boolean	The new Expanded property value.

Remarks

The ExpandedChanged event allows you to handle the group’s Expanded property value changes.

The following code snippet handles the ExpandedChanged event:

<DxFormLayout>
    <DxFormLayoutGroup Caption="Personal Information" 
                       ExpandedChanged="@ExpandedChanged"
                       ExpandButtonDisplayMode="GroupExpandButtonDisplayMode.Start">
        <DxFormLayoutItem Caption="First Name:">
            <DxTextBox />
        </DxFormLayoutItem>
        <DxFormLayoutItem Caption="Last Name:">
            <DxTextBox />
        </DxFormLayoutItem>

    </DxFormLayoutGroup>
</DxFormLayout>

The group is @GroupState

@code {
    string GroupState { get; set; } = "open";
    void ExpandedChanged(bool NewExpanded) {
        if (NewExpanded)
            GroupState = "open";
        else
            GroupState = "closed";
    }
}

Set the ExpandButtonDisplayMode property to Start or End to allow users to expand or collapse the group.