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

Opens a document in the specified format from an array of bytes.

Namespace: DevExpress.Web.ASPxSpreadsheet

Assembly: DevExpress.Web.ASPxSpreadsheet.v24.1.dll

NuGet Package: DevExpress.Web.Office

Declaration

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

Parameters

Name Type Description
documentId String

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

format DocumentFormat

The document format.

contentAccessorByBytes Func<Byte[]>

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

Remarks

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.

View Example: How to save/load documents to/from a database

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

    // Open a document from a byte array 
    byte[] documentContentAsByteArray = GetByteArrayFromCustomDocumentStorage();
    using (var stream = GetStreamFromCustomDocumentStorage()) {
        ASPxSpreadsheet1.Open(uniqueDocumentId, DocumentFormat.Xlsx, () => 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) 
}

Note

We recommend that you do not use the LoadDocument method to open a document. When you call this method, the ASPxSpreadsheet does not receive information about the opened document and cannot work with it correctly.

The following code snippets (auto-collected from DevExpress Examples) contain references to the Open(String, DocumentFormat, Func<Byte[]>) method.

Note

The algorithm used to collect these code examples remains a work in progress. Accordingly, the links and snippets below may produce inaccurate results. If you encounter an issue with code examples below, please use the feedback form on this page to report the issue.

See Also