Targeting Azure Storage: Listing 3: Add Blob from a Local File to the Container

The following code in the insertButton_Click event handler gets the local file properties and content and creates a blob with the file's properties and content. It then adds the blob to the current container and creates a log entry with the file spec and creation times. Blobs are named automatically with the UTC date and time as the filename and the source data type as the extension, as in 2009-05-20T21:36:13.9397311Z.bmp for a bitmap graphic.

// Get the file metadata and contents
// From the FileUpload control
properties.ContentType = 
  fileUploadControl.PostedFile.ContentType;
contentLength = 
  fileUploadControl.PostedFile.ContentLength;
fileBlob = new 
  BlobContents(fileUploadControl.FileBytes);

if (contentLength > 0)
{
    // Add metadata to properties
    properties.Metadata = metadata;

    // Add the blob to the container
    blobContainer.
      CreateBlob(properties, fileBlob, true);

    blobContainer.UpdateBlobMetadata(properties);

    if (doWriteLogs)
    {
        string logEntry = properties.Name + ";" + 
          metadata["FileName"] + ";" + 
          properties.ContentType + ";" +
          properties.ContentEncoding + ";" + 
          contentLength.ToString("#,##0") + ";" +
          properties.LastModifiedTime + ";" + 
          metadata["UploadTime"] + ";" +
          metadata["CreateTime"] + ";" + 
          metadata["Submitter"] + ";" + 
          DateTime.Now.ToString();
        RoleManager.WriteToLog("Verbose", logEntry);
    }

    // Update the GridView
    UpdateFileList();
}
comments powered by Disqus

Featured

  • Python in VS Code Adds Data Viewer for Debugging

    The January 2021 update to the Python Extension for Visual Studio Code is out with a short list of new features headed by a data viewer used while debugging.

  • GitHub Ships Enterprise Server 3.0 Release Candidate

    It's described as "the biggest ever change to Enterprise Server," with improvements to Actions, Packages, mobile, security and more.

  • Attacks on .NET Apps Grow in Number, Severity, Says Security Firm

    .NET apps were found to have more serious vulnerabilities and suffer more attacks last year, according to data gathered by Contrast Labs.

  • Microsoft Opens Up Old Win32 APIs to C# and Rust, More Languages to Come

    Microsoft is opening up old Win32 APIs long used for 32-bit Windows programming, letting coders use languages of their choice instead of the default C/C++ option.

Upcoming Events