Question

I have some code to download a text file from a website. When the requested file does not exist, my application downloads a text file which has html content. I need to filter this html content (should not download a text file with html content if the requested file does not exist) and need to download only text files which has the correct content. Below is my code.

string FilePath = @"C:\TextFiles\" + FileName + String.Format("{0:00000}", i) + ".TXT";
Directory.CreateDirectory(Path.GetDirectoryName(FilePath));
//MessageBox.Show(FilePath);

using (FileStream download = new FileStream(FilePath, FileMode.Create))
{
    Stream stream = clientx.GetResponse().GetResponseStream();
    while ((read = stream.Read(buffer, 0, buffer.Length)) != 0)
    {

        download.Write(buffer, 0, read);

    }
}

Please advice

Answer 1

Assuming clientx is HttpWebRequest then just check the StatusCode of the response:

HttpWebResponse response = (HttpWebResponse)clientx.GetResponse();
if (response.StatusCode != HttpStatusCode.OK)
{
    MessageBox.Show("Error reading page: " + response.StatusCode);
}
else
{
    string FilePath = @"C:\TextFiles\" + FileName + String.Format("{0:00000}", i) + ".TXT";
    Directory.CreateDirectory(Path.GetDirectoryName(FilePath));
    //MessageBox.Show(FilePath);
    using (FileStream download = new FileStream(FilePath, FileMode.Create))
    {
        Stream stream = response .GetResponseStream();
        while ((read = stream.Read(buffer, 0, buffer.Length)) != 0)
        {
            download.Write(buffer, 0, read);
        }
    }
}