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Validating and providing feedback

Last post 11-23-2009, 3:10 PM by scpeterson. 3 replies.


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11-10-2009, 12:40 PM 57035

scpeterson
Joined on 11-10-2009
Posts 3

Validating and providing feedback

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Hello:

I am using the FileValidating event to check for duplicate files. If I find a duplicate file, I execute an args.Delete() to remove the file so that the FileUploaded event does not fire for that file. I want to record the names of each file that is a duplicate and present that list to my users. I've tried adding the names to a label, but the label gets cleared out each time I go back to the FileValidating event. I tried adding the information to a Session variable but that did not seem to work either. I tried populating a label in the UploadCompleted event, but if all my files are duplicates, that event will never fire.

Any ideas on how to do this would be most welcome.

11-16-2009, 9:45 PM 57196 in reply to 57035

cutechat
Joined on 07-22-2004
Posts 2,332

Re: Validating and providing feedback

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Hi,

You have two solution :

1 , throw an exception in the event handler, and uploader will show the exception message.

2 , try this way :

<%@ Page Language="C#" %>

<%@ Import Namespace="CuteWebUI" %>
<%@ Register TagPrefix="CuteWebUI" Namespace="CuteWebUI" Assembly="CuteWebUI.AjaxUploader" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

protected void UploadAttachments1_FileValidating(object sender, UploaderEventArgs args)
	{
		//you can send some data or message to client side
		UploadAttachments1.SetValidationServerData("File validated at " + DateTime.Now.ToString("HH:mm:ss"));

//updating the UI has no effect!
		labelMsg.Text = "Validated!";
	}

protected void UploadAttachments1_FileUploaded(object sender, UploaderEventArgs args)
	{
		
	}
</script>

<html xmlns="http://www.w3.org/1999/xhtml">
<head id="Head1" runat="server">
	<title>Untitled Page</title>
</head>
<body>
	<form id="form1" runat="server">
		<div>
			<CuteWebUI:UploadAttachments runat="server" ID="UploadAttachments1" InsertText="Add files" OnFileValidating="UploadAttachments1_FileValidating" OnFileUploaded="UploadAttachments1_FileUploaded">
			</CuteWebUI:UploadAttachments>
			<br />
			<asp:Label runat="server" ID="labelMsg" />
		</div>
	</form>
</body>

</html>

Regards,
Terry

11-23-2009, 3:09 PM 57353 in reply to 57196

scpeterson
Joined on 11-10-2009
Posts 3

Re: Validating and providing feedback

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I tried method 2 and it seems to work just fine. In the FileValidating event, I used a string that tells the user that the file already exists and so the file will not be uploaded. I then call args.delete() to remove that file so it is not copied. Since my uploaded files may or may not be duplicates, I need to test for a message in the alert and only display an alert if there is a message, i.e., the duplicate message I added in the FileValidating event:

If System.IO.File.Exists(fullFileName) Then
'The file already exists on the server so we need to delete it from the temporary
' upload directory (so it doens't get called in the FileUploaded event) and alert the user
UploadAttachments1.SetValidationServerData(String.Format("A file named {0} already exists and will not be uploaded.", args.FileName))
args.Delete()
End If

11-23-2009, 3:10 PM 57354 in reply to 57353

scpeterson
Joined on 11-10-2009
Posts 3

Re: Validating and providing feedback

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I also modified the JS script as follows:

function CuteWebUI_AjaxUploader_OnTaskComplete(file) {
//You can set the custom data here, or use uploader.getitems()[i].ServerData)
if (file.ServerData !=null && file.ServerData != '')
alert(file.ServerData);
}