To enable it, just slightly modify the client application considered above. However, you should understand that the multiple upload feature works correctly only in browsers that support HTML5. The only change required in the client application considered above is adding the AllowMultiple property which specifies whether multiple files can be selected for upload:.
Now the handler code may look as follows:. As a result, you will get the same upload interface, but the text box displays the number of selected files:. The FileUpload control is great when you only upload a few small files, but it has several disadvantages:.
Fortunately, some third party uploaders are partially free of these concerns. Nowadays all popular browsers support the Flash or newer HTML5 platform, which allows the creating of advanced file upload using Flex or JavaScript respectively. Thus, there are a lot of third-party uploaders. These uploaders are very good at multiple file upload, provide a simple interface, and are supported by a big community of developers.
However, the following tasks cannot be solved by these uploaders:. How to upload files in ASP. NET Nowadays you may find file upload in almost every website — from forums that allow users to upload photos for their avatars, to online auctions where users can create galleries with a lot of images.
Files Upload Basics The upload process is quite simple. The client application packs these files to a POST request and sends it to the server. The server parses the request, handles it for example, saves files on a hard disk , and sends a response to the client side. NET the default value is seconds. The form should also contain id , name , and method attributes. Typically they are automatically generated by ASP.
The onClick attribute of the Upload File button specifies the event handler that processes file upload. SaveAs Server. FileName ; FileUploadedLabel. Multiple Files Upload The most important advantage of the FileUpload server control is the support of multiple file upload.
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This folder is where we will store the uploaded images. Next, we need to create a new Webform. This is where the fun begins. In order to solve this, the extra button is provided. Your mark-up for the two controls should look like:. View All.
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