Member Avatar for sharon.chapman7

Hi,
I am getting an System.OutofmemoryException when using Filestream to load zip file. the file is 521MB. My code is:

//Insert using Filestream, file into SQL Server Table
        private void btnInsert_Click(object sender, EventArgs e)
        {
            OpenFileDialog openFileDlg = new OpenFileDialog();
            openFileDlg.InitialDirectory = Directory.GetCurrentDirectory();
            if (openFileDlg.ShowDialog() == DialogResult.OK)
            {
                FileInfo fi = new FileInfo(openFileDlg.FileName);
                FileStream fs = new FileStream(fi.FullName, FileMode.Open, FileAccess.Read);
                BinaryReader rdr = new BinaryReader(fs);
                byte[] fileData = rdr.ReadBytes((int)fs.Length);
                rdr.Close();
                fs.Close();

My program dies on this line: byte[] fileData = rdr.ReadBytes((int)fs.Length);
i have also attached the detail for the System.OutofMemoryException. I am runing this on a Windows 7, 64bit

machine.

thanks for your help.

Sharon

subject: Filestreaming System.OutofMemoryException

Hi,
I am getting an System.OutofmemoryException when using Filestream to load zip file. the file is 521MB. My code is:

//Insert using Filestream, file into SQL Server Table
        private void btnInsert_Click(object sender, EventArgs e)
        {
            OpenFileDialog openFileDlg = new OpenFileDialog();
            openFileDlg.InitialDirectory = Directory.GetCurrentDirectory();
            if (openFileDlg.ShowDialog() == DialogResult.OK)
            {
                FileInfo fi = new FileInfo(openFileDlg.FileName);
                FileStream fs = new FileStream(fi.FullName, FileMode.Open, FileAccess.Read);
                BinaryReader rdr = new BinaryReader(fs);
                byte[] fileData = rdr.ReadBytes((int)fs.Length);
                rdr.Close();
                fs.Close();

My program dies on this line: byte[] fileData = rdr.ReadBytes((int)fs.Length);
i have also attached the detail for the System.OutofMemoryException.  I am runing this on a Windows 7, 64bit machine.

thanks for your help.

Sharon
Edited by Dani because: Formatting fixed
  • 4 Contributors
  • 8 Replies
  • 259 Views
  • 4 Days Discussion Span
  • Latest Post Latest Post by gusano79

Recommended Answers

All 8 Replies

Member Avatar for ddanbe

You are casting to an int=int32. Should that not be long=int64 ?

Member Avatar for gusano79

So... how much RAM do you have in your system? I recommend you keep an eye on the Performance Monitor while your program is running. Watching the amount of free memory available might be very educational.

Member Avatar for sharon.chapman7

So... how much RAM do you have in your system? I recommend you keep an eye on the Performance Monitor while your program is running. Watching the amount of free memory available might be very educational.

Hi,

As I mentioned I have a machine that has 8 GB of memory. I had to shut down my machine to take it home last night.

When I tried to load the file again today it loaded with no problem. Normally I will only be loading one file at a

time, but in this case I was testing my Development database and was loading 28 files one right after the other.

Now my question is, since it is working ok now, is there a problem I still need to fix?

Sharon

Member Avatar for sharon.chapman7

You are casting to an int=int32. Should that not be long=int64 ?

Hi,

As I mentioned I have a machine that has 8 GB of memory. I had to shut down my machine to take it home last night.

When I tried to load the file again today it loaded with no problem. Normally I will only be loading one file at a

time, but in this case I was testing my Development database and was loading 28 files one right after the other.


Sharon

Member Avatar for skatamatic

Windows has a limit of 2GB of memory per process. How big is the file that you are trying to read?

Member Avatar for sharon.chapman7

You are casting to an int=int32. Should that not be long=int64 ?

Hi,

As I mentioned I have a machine that has 8 GB of memory. I had to shut down my machine to take it home last night.

When I tried to load the file again today it loaded with no problem. Normally I will only be loading one file at a

time, but in this case I was testing my Development database and was loading 28 files one right after the other.

Sharon

Member Avatar for skatamatic

Ummm. I hope you realize that you posted the exact same thing about an hour prior...

Member Avatar for gusano79

As I mentioned I have a machine that has 8 GB of memory.

I've re-read your original post a number of times, and I'm still not seeing where you said how much RAM you have.

but in this case I was testing my Development database and was loading 28 files one right after the other.

Are they all about the same size, ~500 MB? If so, there's your answer: ~1/2 GB * 28 = ~14 GB, so if the CLR isn't collecting garbage fast enough, it'll run out of memory quite easily.

Now my question is, since it is working ok now, is there a problem I still need to fix?

I would imagine so. One success does not necessarily mean the issue is fixed. It's possible that, while there still may be a problem, it only comes up under rare circumstances. That may be acceptable to you--if so, then make a note of it and move on.

If you're interested in understanding what's happening and why, please humor me and do your test with the performance monitor running.

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