Viewing PDF file after obtaining bytes

Question

I would like to view a file .PDF staying at a FTP. I can get the Stream through the bytes, but I can’t create the file in a browser.

Follow the code so far:

 private void btnVerFilePdf_Click(object sender, EventArgs e)
    {
        WebClient request = new WebClient();
        string url = "ftp://nfsaai.com.br@hostip/" + "fileexample.pdf";
        request.Credentials = new NetworkCredential("userstr", "passwordstr");


        try
        {        
            byte[] newFileData = request.DownloadData(url);
            string fileString = System.Text.Encoding.UTF8.GetString(newFileData);
            Console.WriteLine(fileString); 
        }
        catch (Exception error)
        {
            MessageBox.Show(String.Format("erro : {0}", error.Message));       
        }       
    }

Answer 1

The simplest form in WinForms is using the component Web Browser.

Example:

public partial class Form1 : Form
{
    public Form1()
    {
        InitializeComponent();
        //No seu caso pode por direto o caminho do FTP:
        RenderizarPDF(@"C:\CaminhoPDF\MeuDocumento.pdf");
    }

    private void RenderizarPDF(string filePath)
    {
        if (!string.IsNullOrWhiteSpace(filePath))
        {
            webBrowser1.Navigate(@filePath);
        }
    }
}

If you have a problem with displaying the PDF directly from FTP in the WebBrowser I suggest to implement a feature that saves the PDF Stream that you have already obtained in a temporary folder with a Guid which identifies the file and after the completion of the reading you can delete the PDF that has that name.