ContentChangedEventArgs.SubDocument Property

Gets the sub-document in which content was changed.

Namespace: DevExpress.Blazor.RichEdit

Assembly: DevExpress.Blazor.RichEdit.v23.2.dll

NuGet Package: DevExpress.Blazor.RichEdit

Declaration

public SubDocument SubDocument { get; }

Property Value

Type	Description
SubDocument	The sub-document.

Remarks

You can access this event argument inside the ContentInserted and ContentRemoved event handlers. Depending on the event, the SubDocument property returns the sub-document into which content was inserted or from which content was removed. To get the changed interval within this sub-document, use the Interval event argument.

The example below demonstrates how you can log changes:

<DxRichEdit ContentInserted="OnContentInserted" ContentRemoved="OnContentRemoved"/>

@code {
    string filePath;

    protected override async Task OnInitializedAsync() {
        await base.OnInitializedAsync();
        filePath = @"C:\ChangeLogs\" + DateTime.Now.ToString("yyyy-M-d") + ".txt";
        using (FileStream fs = File.Create(filePath));
    }

    async void OnContentInserted(ContentChangedEventArgs args) {
        TextSpan textSpan = await args.SubDocument.GetTextSpanAsync(args.Interval);
        File.AppendAllText(filePath,
            "'" + textSpan.Text + "': was inserted to " + args.SubDocument.Type.ToString() +'\n');
    }

    async void OnContentRemoved(ContentRemovedEventArgs args) {
        File.AppendAllText(filePath,
            "'" + args.RemovedText + "': was removed from " + args.SubDocument.Type.ToString() +'\n');
    }
}