Uploading Image to Azure Blob using File Uploader in ASP.NET?

Question

I need to allow a user to specify an image that needs to be uploaded to the Azure DB instead of hard coding the Image Path like all the tutorials out there. This is what I have so far:

<asp:FileUpload ID="imageUploader" runat="server" />
<asp:Button ID="uploadBtn" runat="server" Text="Upload Image" class="btn btn-success btn-sm" OnClick="uploadBtn_Click" />

Code:

CloudStorageAccount storageAccount = CloudStorageAccount.Parse(ConfigurationManager.AppSettings["StorageConnectionString"]);
CloudBlobClient blobClient = storageAccount.CreateCloudBlobClient();

 // Retrieve a reference to a container. 
CloudBlobContainer container = blobClient.GetContainerReference("pictures");

// Create the container if it doesn't already exist.
container.CreateIfNotExists();
container.SetPermissions(new BlobContainerPermissions
{
        PublicAccess = BlobContainerPublicAccessType.Blob
});

CloudBlockBlob blockBlob = container.GetBlockBlobReference("myblob");

blockBlob.UploadFromFile(imageUploader.PostedFile.FileName, FileMode.Open);

However this doesn't seem to work. How can I upload an image to azure using a File Uploader in ASP.NET?

Ashley Medway · Accepted Answer · 2015-02-22 12:46:46Z

3

Your UploadFromFile is using the wrong parameter. See Microsoft CloudBlockBlob.UploadFromFile. The first parameter should be a file path i.e. C:\Users\etc... not just the name of the file that you are parsing imageUploader.PostedFile.FileName.

You most likely want to be using UploadFromStream like this:

blockBlob.UploadFromStream(imageUploader.PostedFile.InputStream);

You should check the documentation for CloudBlockBlob as there are a number of different upload methods.

edited Feb 22, 2015 at 12:46

answered Feb 22, 2015 at 12:33

Ashley Medway

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1 Comment

MWUser Over a year ago

Hmmm it shows an error when I use that code Ashley: 'System.Web.HttpPostedFile' does not contain a definition for 'FileContent' and no extension method 'FileContent' accepting a first argument of type 'System.Web.HttpPostedFile' could be found (are you missing a using directive or an assembly reference?)

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