I want to clear the file path from the file upload. The file upload is inside the update panel and I am using a AsyncFileUpload
. How can I clear the file and change the background color of the fileupload
btnAudUpload_Click Method
string filename =FileUpload.FileName;
string Fullpath = Path.Combine(@"D:\Media", filename);
if (FileUpload.HasFile)
{
if (filename.ToLower().EndsWith("mp4"))
{
//Saving the file
}
else
{
//I want to clear the FileUpload content here
}
}
Clear the Attributes worked for me... but that will remove styles and other stuff
string filename =FileUpload.FileName;
string Fullpath = Path.Combine(@"D:\Media", filename);
if (FileUpload.HasFile)
{
if (filename.ToLower().EndsWith("mp4"))
{
//Saving the file
}
else
{
//I want to clear the FileUpload content here
FileUpload.Attributes.Clear();
}
}
I know this thread is almost a year old, but this still seems to be a prevalent issue. The easiest fix I've found is to set the file upload control to a new instance of it.
FileUpload1 = new FileUpload();
If you want to have interactivity without relouding the page you'll have to use JavaScript. That's why I would check the file extension on the client side instead of the server side. Example:
function checkFile() {
var input = document.getElementById('fileUpload').value.toLowerCase();
var extension = '.mp4';
if (!input.indexOf(extension, input.length - extension.length) != -1) {
alert('Invalid file extension. Only .mp4 is allowed.');
document.getElementById('fileUpload').value = '';
}
}
The only thing you'll have to add is changing the fileUpload
background color which is very easy to do.
Good luck!
我认为当你做回发文件时,默认情况下会删除contnet属性,因为出于安全原因!
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