Question

I’m using a FileUpload control to allow users to upload a file to an SQL database.

I have a button which I use to load the selected file via C# code.

However if the file size is of certain size the upload fail. I have a break point on the C# code which never gets hit when the size is to large but it does when the file size is OK. This is where I would have put the check but the break point doesn’t get hit!??!

What’s the best way to implement this? Should I use JavaScript?

The C# code behind the button is below but it never get fired:

protected void buttonAddDocumentType_Click(object sender, EventArgs e)
{
    int size = fileUploadDocument.PostedFile.ContentLength;

    //This is where I'd like to perform the file size check 

    byte[] fileData = new byte[size];

    fileUploadDocument.PostedFile.InputStream.Read(fileData, 0, size);

    WebDataAccess.InsertDocument(Int32.Parse(Request.QueryString["ID"].ToString()), Int32.Parse(comboDocumentTypes.SelectedValue), fileUploadDocument.FileName, fileUploadDocument.PostedFile.ContentType,
                fileUploadDocument.FileBytes.Count(), fileData);

    comboDocumentTypes.SelectedIndex = -1;
}

I’m using ASP.Net 4.0

Thanks in advance.

Answer 1

Asp.Net has an upper limit for file uploads. You can configure this limit in web.config and validate this range before file upload event is started.

It’s not possible to use code to catch this error, as it occurs before any code is started.