Uploading files to the database using C#

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C#

Oracle

Hi
I'm trying to upload files to Oracle database and retrieve it. However, I didn't find it a comprehensive example to follow. There are some codes I didn't understand .
.Please have a look at my codes and help me to do it.
Thank you
Example I followed : http://csharp-guide.blogspot.co.uk/search/label/INSERT%20BLOB[^]>
My code :

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Data.OracleClient;
using System.Configuration;
using System.Data;
using System.IO;

public partial class Lecturer_Resources_to_upload : System.Web.UI.Page

    protected void Page_Load(object sender, EventArgs e)
    {

    }
    protected void cmdUpload_Click(object sender, EventArgs e)
    {
        try
        {
            if (fileUploadDocument.PostedFile.ContentLength > 0)
            {
                // Get the File name and Extension
                string FileName = Path.GetFileName(fileUploadDocument.PostedFile.FileName);
                string FileExtension = Path.GetExtension(fileUploadDocument.PostedFile.FileName);
                //
                // Extract the content of the Document into a Byte array
                int intlength = fileUploadDocument.PostedFile.ContentLength;
                Byte[] byteData = new Byte[intlength];
                fileUploadDocument.PostedFile.InputStream.Read(byteData, 0, intlength);
                //
                // Save the file to the DB
                string strConn = ConfigurationManager.ConnectionStrings["ConnectionString"].ToString();
                objConn = new OracleConnection(strConn);
                //
                  StringBuilder strQueryBuilder = new StringBuilder("INSERT INTO RESOURCES(RESOURCES_ID, FILE_NAME, TYPE, RESOURCE_FILE) VALUES (");
                strQueryBuilder.Append("'1', ");
                strQueryBuilder.Append("'" + FileName + "', ");
                strQueryBuilder.Append("'" + FileExtension + "', ");
                strQueryBuilder.Append(" :RESOURCE_FILE)");

                String strQuery = strQueryBuilder.ToString();
                //
                OracleParameter blobParameter = new OracleParameter();
                blobParameter.ParameterName = "resources_file";
                blobParameter.OracleType = OracleType.Blob;
                blobParameter.Direction = ParameterDirection.Input;
                blobParameter.Value = byteData;

                objCmd = new OracleCommand(strQuery, objConn);
                objCmd.Parameters.Add(blobParameter);
                //
                objConn.Open();
                objCmd.ExecuteNonQuery();
                objConn.Close();
                //
                lblMsg.Text = "Document Uploaded Succesfully";
            }
        }
        catch (Exception ex)
        {
            lblMsg.Text = " Error uploading Document: " + ex.Message.ToString();
        }
    }
}

The codes where Im getting the errors :

StringBuilder strQueryBuilder = new StringBuilder("INSERT INTO RESOURCES(RESOURCES_ID, FILE_NAME, TYPE, RESOURCE_FILE) VALUES (");
               strQueryBuilder.Append("'1', ");
               strQueryBuilder.Append("'" + FileName + "', ");
               strQueryBuilder.Append("'" + FileExtension + "', ");
               strQueryBuilder.Append(" :RESOURCE_FILE)");

               String strQuery = strQueryBuilder.ToString();
               //
               OracleParameter blobParameter = new OracleParameter();
               blobParameter.ParameterName = "Resources_FILE";
               blobParameter.OracleType = OracleType.Blob;
               blobParameter.Direction = ParameterDirection.Input;
               blobParameter.Value = byteData;

               objCmd = new OracleCommand(strQuery, objConn);
               objCmd.Parameters.Add(blobParameter);
               //
               objConn.Open();
               objCmd.ExecuteNonQuery();
               objConn.Close();

The issue I have are these codes above are all underlined Red. It gives me an error that they don't exist in the current context