C# Winform File renaming

I have a small Inventory Control winforms project that I'm developing and need help with one aspect. My workflow is this:
1) User selects a SKU Number in a text box (SKUText), and the form is populated with all fields for that record.
2) User uploads an image by selecting a local image to be displayed in a picturebox. The image is uploaded to an FTP server and will be displayed from that path in the picturebox.

What I need help with is that I need to rename the file before the FTP upload so that it matches the SKU number without changing the extension. Im using [ftploc] as the full path and filename to pass to the FTP upload destination to as shown in my code.

Example:  User uploads 'toy_truck.jpg' and I need the filename to become (SKUText.Text).jpg

Thanks the help in advance!

 private void UploadButton_Click(object sender, EventArgs e)
        {
         OpenFileDialog fd = new OpenFileDialog();
         fd.Filter = "Image Files(*.jpg; *.png; *.gif; *.bmp)|*.jpg; *.png; *.gif; *.bmp";
         fd.Title = "Select File for Upload...";          
         if (fd.ShowDialog() == DialogResult.OK)
             {
                                //Need fd.SafeFileName below renamed to text value of SKUText.Text, a textbox further up
				//in my code, without affecting the file extension
				
		     String ftploc = ("ftp://x.x.x.x/" + fd.SafeFileName);           
                     FtpWebRequest request = (FtpWebRequest)WebRequest.Create(ftploc);
                     request.Method = WebRequestMethods.Ftp.UploadFile;

                     // FTP Login
                     request.Credentials = new NetworkCredential("domain\\user", "pass");
                     request.Timeout = -1;
                     request.UsePassive = true;
                     request.UseBinary = true;
                     request.KeepAlive = true;
                     request.Proxy = null;

                     // Copy the contents of the file to the request stream.
                     StreamReader sourceStream = new StreamReader(fd.FileName);
                     byte[] fileContents = Encoding.UTF8.GetBytes(sourceStream.ReadToEnd());
                     sourceStream.Close();
                     request.ContentLength = fileContents.Length;
                     Stream requestStream = request.GetRequestStream();
                     requestStream.Write(fileContents, 0, fileContents.Length);
                     requestStream.Close();

                     FtpWebResponse response = (FtpWebResponse)request.GetResponse();
                     MessageBox.Show("Upload Complete");
                     //ImageBox1.ImageLocation = ftploc;
                     
                     response.Close();
             }
           
        }         

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hhnetworksAsked:
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Tapan PattanaikConnect With a Mentor Senior EngineerCommented:
HI hhnetworks,

Please use this below code. In your code only you have to retrieve the extension of the file from the path then merge with the value of textbox "SKUText" .

 private void UploadButton_Click(object sender, EventArgs e)
        {
            OpenFileDialog fd = new OpenFileDialog();
            fd.Filter = "Image Files(*.jpg; *.png; *.gif; *.bmp)|*.jpg; *.png; *.gif; *.bmp";
            fd.Title = "Select File for Upload...";
            if (fd.ShowDialog() == DialogResult.OK)
            {
                //Need fd.SafeFileName below renamed to text value of SKUText.Text, a textbox further up
                //in my code, without affecting the file extension                

                String ftploc = ("ftp://x.x.x.x/" + fd.SafeFileName);

                string Extenstion = Path.GetExtension(ftploc);
                string fileName =SKUText.Text.Trim()+Extenstion ;
                ftploc = "ftp://x.x.x.x/" + fileName;             
               
                FtpWebRequest request = (FtpWebRequest)WebRequest.Create(ftploc);
                request.Method = WebRequestMethods.Ftp.UploadFile;

                // FTP Login
                request.Credentials = new NetworkCredential("domain\\user", "pass");
                request.Timeout = -1;
                request.UsePassive = true;
                request.UseBinary = true;
                request.KeepAlive = true;
                request.Proxy = null;

                // Copy the contents of the file to the request stream.
                StreamReader sourceStream = new StreamReader(fd.FileName);
                byte[] fileContents = Encoding.UTF8.GetBytes(sourceStream.ReadToEnd());
                sourceStream.Close();
                request.ContentLength = fileContents.Length;
                Stream requestStream = request.GetRequestStream();
                requestStream.Write(fileContents, 0, fileContents.Length);
                requestStream.Close();

                FtpWebResponse response = (FtpWebResponse)request.GetResponse();
                MessageBox.Show("Upload Complete");
                //ImageBox1.ImageLocation = ftploc;

                response.Close();
            }

        }

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hhnetworksAuthor Commented:
Worked perfectly!!

Thank you very much!
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