upload a excel File and put excel file data in database though asp.net

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.IO;
using System.Web.UI.WebControls;
using System.Data.SqlClient;
using System.Diagnostics;

Boolean IsClick = true;
byte[] Attachmnt;
ClassLibrary1.Entity objEntity = new ClassLibrary1.Entity();
Query objQuery = new Query();
string Connstr = System.Configuration.ConfigurationManager.AppSettings["Connstr"].ToString();

private void btnBrowse_Click(object sender, EventArgs e)
{
OpenFileDialog openFileDialog1 = new OpenFileDialog();                openFileDialog1.InitialDirectory = @"C:\";
openFileDialog1.Title = "Select ur file ";
openFileDialog1.CheckFileExists = true;
openFileDialog1.CheckPathExists = true;
openFileDialog1.DefaultExt = "doc";
openFileDialog1.Filter = "Excel file(*.xls)|*.xls";
openFileDialog1.FilterIndex = 2;
openFileDialog1.RestoreDirectory = true;

openFileDialog1.ReadOnlyChecked = true;
openFileDialog1.ShowReadOnly = true;
                
if (openFileDialog1.ShowDialog() == DialogResult.OK)
{
tbUpload.Text = openFileDialog1.SafeFileName;
FilePath = openFileDialog1.FileName;
if (openFileDialog1.FileName != null)   
{
v_Filepath = FilePath;
System.IO.FileStream fs = new System.IO.FileStream(FilePath, System.IO.FileMode.Open, System.IO.FileAccess.ReadWrite);
System.IO.BinaryReader binaryReader = new System.IO.BinaryReader(fs);
long byteLength = new System.IO.FileInfo(FilePath).Length;
Attachmnt = binaryReader.ReadBytes((Int32)byteLength);
fs.Close();
fs.Dispose();
binaryReader.Close();
  }                    
 }
}   

 private void btnSubmit_Click(object sender, EventArgs e)
{            
Document objDoc = new Document();
objDoc.DocContent = Attachmnt;
objEntity.ResumeData_ = objDoc.DocContent;
objEntity.Submit();
}
  
public class Document   
{
 public int DocId { get; set; }
 public string DocName { get; set; }
 public byte[] DocContent { get; set; }
}  

namespace ClassLibrary1
{
    public class Entity
    {   
        private byte[] ResumeData;
        public byte[] ResumeData_
        {
            get { return ResumeData; }
            set { ResumeData = value; }
        }   
 string Connstr=System.Configuration.ConfigurationManager.AppSettings["Connstr"].ToString();
        public void Submit()
        {
            SqlCommand Cmd = new SqlCommand();
            SqlConnection Conn = new SqlConnection(Connstr);
            Conn.Open();
            Cmd.Connection = Conn;
            Cmd.CommandType = CommandType.StoredProcedure;
            Cmd.CommandText = "SP_Insert_Joinee";
            Cmd.ExecuteNonQuery();
        }
}
}

public DataTable GetTable(string filename, string SheetName, string outTableName)
   {
       try
       {
           string Con = @"Provider=Microsoft.Jet.OLEDB.4.0;" +
                       @"Data Source=" + filename + ";" +
                       @"Extended Properties=" + Convert.ToChar(34).ToString() +
                       @"Excel 8.0;" + "Imex=2;" + "HDR=Yes;" + Convert.ToChar(34).ToString();
           OleDbConnection oleConn = new OleDbConnection(Con);
           oleConn.Open();
           OleDbCommand oleCmdSelect = new OleDbCommand();
           oleCmdSelect = new OleDbCommand(
                   @"SELECT * FROM ["
                   + SheetName
                   + "$" + "]", oleConn);
           OleDbDataAdapter oleAdapter = new OleDbDataAdapter();
           oleAdapter.SelectCommand = oleCmdSelect;
           DataTable dt = new DataTable(outTableName);
           oleAdapter.FillSchema(dt, SchemaType.Source);
           oleAdapter.Fill(dt);
           oleCmdSelect.Dispose();
           oleCmdSelect = null;
           oleAdapter.Dispose();
           oleAdapter = null;
           oleConn.Dispose();
           oleConn = null;
           return dt;
       }
       catch (Exception ex)
       {
           throw ex;
       }
   }