Working with files on the client side

[JDT]

Hi Telerik,

I wanted to access files to be uploaded on the client before uploading them. On both the FileuploadStarting event, and FileUploaded event I can not access the file. I get access denied exceptions and in FileUploadStarting, e.NewFileStream always returns null. What should I do?

I would prefer to access the file on "FileUploaded"

Thanks!

void RadUpload_FileUploadStarting(object sender, Telerik.Windows.Controls.FileUploadStartingEventArgs e)
        {
            FileStream fs = e.NewFileStream as FileStream;
}

[Tina Stancheva]

Hello JDT,

You can use the e.SelectedFile property instead of the NewFileStream one. The SelectedFile will give you further access to the uploaded or uploading file. You can use it in both event handlers - FileUploaded and FileUploadStarting depending on your requirements:

private void RadUpload1_FileUploadStarting(object sender, FileUploadStartingEventArgs e)
{
    RadUploadSelectedFile file = e.SelectedFile as RadUploadSelectedFile;
    FileInfo FileInfo = file.File;
    String FileName = file.Name;
    long FileSize = file.Size;
}

I also attached a sample project illustrating this approach. Can you please take a look at it and let me know if this is what you had in mind?

Kind regards,
Tina Stancheva
the Telerik team

Do you want to have your say when we set our development plans? Do you want to know when a feature you care about is added or when a bug fixed? Explore the Telerik Public Issue Tracking system and vote to affect the priority of the items.

[JDT]

Thanks for the example. I added the following code and it worked...I have no idea why this wasn't working before.

e.SelectedFile.File.OpenRead();

Appreciate it!

[Stan]

Hi,

I'm having trouble with the "FileUploadStartingEventArgs". I'm work with the RadUpload (Telerik version v.2010.3.1317.35) but I'm getting the message "Type 'FileUploadStartingEventArgs' is not defined". I can't figure out what I'm doing wrong. Could you please let me know.

Thsnks,

Stan

[Genady Sergeev]

Hello Stan,

FileUploadStartingEventArgs event args are part of RadUpload for Silverlight. However, you seem to be using RadUpload for ASP.NET Ajax, which does not provide such events/event arguments.

Regards,
Genady Sergeev
the Telerik team

[Gurpreet Singh]

Hi,

I don't want to upload file on server. 
I just want to access file content on client side can I use RadUpload control without setting UploadServiceUrl (without handler file).

How can I do this ?

Thanks,
Gurpreet
 

[Tina Stancheva]

Hi Gurpreet,

As the RadUpload control is designed to allow you to easily select and upload files on a server, it might be better to use the OpenFileDialog to open a file on the client-side and manipulate it as you need to.

All the best,
Tina Stancheva
the Telerik team