Calculating the progress percentage

Question

I am using webclient to dowlnoad a file. I am calculating the progress percentage as below

1. I know the filesize (I read it from the database table) of the file going to be downloaded.

2. I am depending on the BytesRecieved property of WebClient to know the total bytes fetched during download.

3. The algorithm I am using is double dProgress = (e.BytesReceived / FileSize)*100); to calculate the progress percentage.

However i am not getting correct progress percentage to update the progress bar.

Is there any method to calculate progress percentage?

Answer 1

Look at the following line: double dProgress = (e.BytesReceived / FileSize)*100)

If both e.BytesReceived and FileSize are integers then you will always have 0 * 100 = 0.

Make something like this:

double dProgress = ((double)e.BytesReceived / FileSize)*100.0

It is because / does integer division when dividing two integers. But you don't want that. So you convert one of the variables to double.

Answer 2

BytesReceived and FileSize most probably are integers so you need to calculate progress this way:

double dProgress = 100.0 * e.BytesReceived / FileSize;