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ASPxRichEdit.Open(String, Func<Byte[]>) Method

Opens a document from an array of bytes.

Namespace: DevExpress.Web.ASPxRichEdit

Assembly: DevExpress.Web.ASPxRichEdit.v23.1.dll

NuGet Package: DevExpress.Web.Office


public void Open(
    string documentId,
    Func<byte[]> contentAccessorByBytes


Name Type Description
documentId String

The document identifier. This value is assigned to the DocumentId property.

contentAccessorByBytes Func<Byte[]>

A method delegate to obtain a byte array from which to open the document.


Call this Open method to load a document from an array of bytes. Specify the documentId parameter to identify the document. If the specified value is not unique within all open documents, the method activates the previously loaded document with the same documentId and ignores the array of bytes.

private void CustomDocumentOpening() {
    var uniqueDocumentId = GetUniqueDocumentId();

    // Open a document from a byte array 
    byte[] documentContentAsByteArray = GetByteArrayFromCustomDocumentStorage();
    using (var stream = GetStreamFromCustomDocumentStorage()) {
        ASPxRichEdit1.Open(uniqueDocumentId, () => documentContentAsByteArray);

private string GetUniqueDocumentId() {
    throw new NotImplementedException();
    // Obtain a previously saved DocumentId (for instance, from a database, if you have previously saved it there): 
    // return GetDocumentIdFromDatabase(); 
    // or 
    // Create a new unique identifier: 
    // return Guid.NewGuid().ToString(); 

private byte[] GetByteArrayFromCustomDocumentStorage() {
    throw new NotImplementedException();
    // Provide your custom logic to obtain a document (for instance, from a database) 

This overload of the Open method determines a document’s format automatically, however this process reduces the method’s performance. Use the Open(String, DocumentFormat, Func<Byte[]>) overload to improve the method performance.

See Also