Empty file not upload to datatable

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C#

ASP.NET

I want to upload Excel file to DataTable.If Excel File is empty then return File is Empty.(Even user typed in cells and delete all the data and make it to be empty then display file is empty.)

I used Contentlength and Fileinfo.But it is not useful.

if (file.ContentLength > 0)

is not give a solution

FileInfo info = new FileInfo(LocalFilePath);
                   long value = fileName.Length;

                   if (value > 0)
                  {

It is also not work

Pls Give me a good solution.

Thanks in advance