SubDocument.RemoveAsync(Int32, Int32, CancellationToken) Method

Removes the specified text interval.

Namespace: DevExpress.Blazor.RichEdit

Assembly: DevExpress.Blazor.RichEdit.v22.1.dll

NuGet Package: DevExpress.Blazor.RichEdit

Declaration

public ValueTask<int> RemoveAsync(
    int startPosition,
    int length,
    CancellationToken cancellationToken = default(CancellationToken)
)

Parameters

Name	Type	Description
startPosition	Int32	The interval start position.
length	Int32	The interval length.

Optional Parameters

Name	Type	Default	Description
cancellationToken	CancellationToken	null	An object that propagates a cancellation notification.

Returns

Type	Description
ValueTask<Int32>	A structure that stores an awaitable result of an asynchronous operation. The awaitable result is an integer value that indicates the number of items deleted, or 0 (zero) if the deletion was unsuccessful.

Remarks

The following example deletes a paragraph mark and joins the first paragraph’s content with the second paragraph’s content:

<DxRichEdit @ref="richEdit" />

@code {
    DxRichEdit richEdit;
    Document documentAPI;
    @* ... *@
    /* Surround the code that contains an asynchronous operation with a try-catch block to handle
    the OperationCanceledException. This exception is thrown when an asynchronous operation is cancelled. */
        try {
            documentAPI = richEdit.DocumentAPI;
            @* ... *@
            Paragraph firstParagraph = await documentAPI.Paragraphs.GetAsync(0);
            await documentAPI.RemoveAsync(firstParagraph.Interval.Start + firstParagraph.Interval.Length - 1, 1);
            @* ... *@
        }
        catch (OperationCanceledException e) {
            Console.WriteLine($"{nameof(OperationCanceledException)} thrown with message: {e.Message}");
        }
}