File upload control with ajax in asp.net

Before you can save the file to the file system, your ASP. NET application must have the necessary Write permissions. The AjaxFileUpload control buffers the file being uploaded onto your web server's hard drive. This temporary folder is located at Path. When you call the SaveAs method to save the uploaded file to a new location, the AjaxFileUpload control deletes the temporary file automatically.

If you don't call the SaveAs method for example, you are saving the uploaded file to a database then you need to call the AjaxFileUploadEventArgs. DeleteTemporaryData method to delete the temporary file. You must add this handler to your Web.

Config file in order for the AjaxFileUpload control to work. If you have a Windows Azure account, you may want to upload files directly to your Windows Azure storage. To do that, you need to follow these simple steps:. Set your Windows Azure connection string by adding a setting to web. Set StoreToAzure property to True. Set AzureContainerName property to the appropriate container name the name of the container where you want the uploaded files to be located on your Windows Azure storage. This property cannot be blank and must follow the rules for valid Windows Azure container names.

Check out this link and go to the Container Names section to see more detail. This feature enables you to store uploaded files directly to Windows Azure. When uploading files directly to Windows Azure, you no longer need to create a temporary file to buffer the upload. That is: add an attribute called multiple in file upload control like the following:. Except multiple tag everything will be same in View and Controller page.

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