ASPxSpreadsheet.Open(String, DocumentFormat, Func<Stream>) Method

Opens a document in the specified format from a stream.

Namespace: DevExpress.Web.ASPxSpreadsheet

Assembly: DevExpress.Web.ASPxSpreadsheet.v21.2.dll


public void Open(
    string documentId,
    DocumentFormat format,
    Func<Stream> contentAccessorByStream


Name Type Description
documentId String

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

format DocumentFormat

The document format.

contentAccessorByStream Func<Stream>

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


Call this Open method to load a document from a stream. 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 stream data.

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

    // Open a document from a stream 
    using (var stream = GetStreamFromCustomDocumentStorage()) {
        ASPxSpreadsheet1.Open(uniqueDocumentId, DocumentFormat.Xlsx, () => stream);

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 FileStream GetStreamFromCustomDocumentStorage() {
    throw new NotImplementedException();
    // Provide your custom logic to obtain a document (for instance, from a database) 
See Also