Validating file upload control
I previously wrote an MSDN article on how to effectively use this control in your ASP. This article is a reintroduction to the file upload process, but instead of using the File Field control, I will show you how to effectively use the new File Upload server control that is offered through ASP. It is important to note that while this article introduces you to the new File Upload server control, it is still quite possible to use the File Field control in your applications today. There are some important items we should go over for this example so you understand all the needed pieces to make this work.
For the example in Listing 1 to work, you have to make the destination folder on the server writeable for the account used by ASP.
Let us take a scenario where we have a gridview in that we have a checkbox column and one file upload controls column and a common submit button outside gridview.
And in this if we check a rows checkbox and we need to check whether the file upload control contains any value or not.
So there is a distinction to make between: Orbeon Forms is able in most cases to synchronize files in the background: the user can keep working with the page while files are being uploaded.
As per the requirement of one of the DNF friend's, I am presenting this article in which we will be validating a file upload control which is inside a grid view control.
In the Properties dialog box, click on the Security tab and make sure the ASP.
NET Machine Account is included in the list and has the proper permissions to write to disk (see Figure 1). Looking at the Security tab of the Uploads folder If you don't see the ASP. NET Machine Account to the folder security definition Click OK to add the ASP. From here, make sure you give this account the proper permissions and then click OK, and you are ready to go.
With uploaded files, this is often not possible, because files can be very large and so take a significant amount of time to be sent to the server, up to minutes or even hours depending on file size and connection speed.Example of the upload control before selection: Example of the upload control sending a file in the background, with progress bar and "Cancel" button: XForms allows you to upload files with the XForms upload control: file:/home/tomcat/apache-tomcat-6.0.29/temp/xforms_upload_2351863081926002422.tmp?filename=orbeon-logo-trimmed-42.png& mediatype=image/png& size=8437& signature=1726db1bea2b3be2f635f60e4f99dc72864548c5 In this case, the uploaded file is encoded an directly embedded into the XML instance.Bill Evjen Reuters December 2005 Applies to: Microsoft ASP.NET 2.0 Microsoft Visual Web Developer 2005 Express Edition Summary: Learn how to use the new File Upload server control in Microsoft ASP. (18 printed pages) Introduction An Example of the File Upload Server Control Conclusion Ever since Microsoft ASP.