Access to the path is denied

Arunkumar Koloth

Hello everyone This is a program for downloading a file from a url when i download a file i got a error like access to the path is denined can any one tell me why this happen This is my code.

    public static void Download(String strURLFileandPath, String strFileSaveFileandPath)
    {
        HttpWebRequest wr = (HttpWebRequest)WebRequest.Create(strURLFileandPath);
        HttpWebResponse ws = (HttpWebResponse)wr.GetResponse();
        Stream str = ws.GetResponseStream();
        byte\[\] inBuf = new byte\[100000\];
        int bytesToRead = (int)inBuf.Length;
        int bytesRead = 0;
        while (bytesToRead > 0)
        {
            int n = str.Read(inBuf, bytesRead, bytesToRead);
            if (n == 0)
                break;
            bytesRead += n;
            bytesToRead -= n;
        }
        try
        {
            
            FileStream fstr = new FileStream(strFileSaveFileandPath, FileMode.OpenOrCreate, FileAccess.Write);
            fstr.Write(inBuf, 0, bytesRead);
            str.Close();
            fstr.Close();
        }
        catch (Exception e) {
            MessageBox.Show(e.Message);
        }
        
    }



    private void button2\_Click(object sender, EventArgs e)
    {
        if (phpurl.Text == "") {
            MessageBox.Show("Invalid Url");
        }
        else if (Uri.IsWellFormedUriString(phpurl.Text, UriKind.Absolute) == false)
        {
            MessageBox.Show("Invalid Url");
        }
        else {
            Download(phpurl.Text, @"D:\\test");
        }

        
    }

Also this is my manifest file

Lost User

The local user does not have the right to write to that particular location on the D drive.

Bastard Programmer from Hell :suss: if you can't read my code, try converting it here[^]

Dave Kreskowiak

What line does this exception occur on?? Either the URL you've specified doesn't exist or you don't have permissions to see it or the filepath that you're writing to doesn't exist or you don't have permissions to write to it. I think the meaning of the error is pretty obvious, given your code.

A guide to posting questions on CodeProject[^]
Dave Kreskowiak

Arunkumar Koloth

Dave Kreskowiak Thanks for your replay this is the line exception occur.

FileStream fstr = new FileStream(strFileSaveFileandPath, FileMode.OpenOrCreate, FileAccess.Write);

Please help me.

Thanks in advance

dybs

Also make sure that file doesn't already exist on your system and is not open by another program (or even your own).

The shout of progress is not "Eureka!" it's "Strange... that's not what i expected". - peterchen

Arunkumar Koloth

Hi dybs, That is a empty folder and there is no way to use the file by any other program. Please help me. Best regards,

Thanks in advance

Dave Kreskowiak

The user that is running your code does not have permissions to write to either D:\ or to D:\test. Or, the filepath you specified in that line of code (use the debugger to find out what it is) doesn't exist.

A guide to posting questions on CodeProject[^]
Dave Kreskowiak

Arunkumar Koloth

Hi thanks for the replay I found what is happening here

Download(textBox1.Text, @"D:\test\test.zip");

i have to tell destination file name and its extention!!!. now my problem is when i download larger files (50 mb ) from my server it is not downloading the file. i thing the problem is here.

byte[] inBuf = new byte[100000];

I thing the array is small so how can i manage it? Please help me to do this...

Thanks in advance...

Arunkumar Koloth

Any one? Please help me. :confused::confused::confused::confused:

Thanks in advance.

ignrod

What you should do to avoid your buffer overflowing is to read some data to your buffer and then writing to the file, all within a loop. This is a very common technique, for example, to copy files.

Arunkumar Koloth

Thanks for your replay. can you explain your answer for better understanding?

Thanks in advance.

Dave Kreskowiak

Have some patience. You posted this when the regular who answer questions (on their own time!) were either going to bed or were already there.

A guide to posting questions on CodeProject[^]
Dave Kreskowiak

ignrod

You can try something like this. I have modified your code slightly to place reading and writing inside the main loop. Also, I recommend having your streams inside a using block, it is simpler to write and safer if any exception is thrown. Note: This code is untested!!

    public static void Download(String strURLFileandPath, String strFileSaveFileandPath)
    {
        HttpWebRequest wr = (HttpWebRequest)WebRequest.Create(strURLFileandPath);
        HttpWebResponse ws = (HttpWebResponse)wr.GetResponse();
        byte\[\] inBuf = new byte\[100000\];
        int bytesToRead = (int)inBuf.Length;
        int bytesRead;
        using (Stream str = ws.GetResponseStream()) 
        {
            using (FileStream fstr = new FileStream(strFileSaveFileandPath, FileMode.OpenOrCreate, FileAccess.Write))
            {
                try
                {
                    while ((bytesRead = str.Read(inBuf, 0, bytesToRead)) > 0) 
                    {
                        fstr.Write(inBuf, 0, bytesRead);
                    }
                }
                catch (Exception e) {
                    MessageBox.Show(e.Message);
                }
            }
        }
    }