How Do I...How Can I Insert Excelfile Data To Sqltable

<add name="Excel03ConString" connectionstring="Provider=Microsoft.Jet.OLEDB.4.0;Data Source={0};Extended Properties='Excel 8.0;HDR=YES'" />
    <add name="Excel07+ConString" connectionstring="Provider=Microsoft.ACE.OLEDB.12.0;Data Source={0};Extended Properties='Excel 8.0;HDR=YES'" />
    <add name="conString" connectionstring="Data Source=DEL-INTRASQL;Initial Catalog=Test;User ID=testu;Password=test;" providername="System.Data.SqlClient" />

<asp:FileUpload ID="FileUpload1" runat="server" />
           <asp:Button Text="Upload" OnClick = "Upload" runat="server" />

protected void Upload(object sender, EventArgs e)
        {
            
            string excelPath = Server.MapPath("~/hindiregion/") + Path.GetFileName(FileUpload1.PostedFile.FileName);
            FileUpload1.SaveAs(@"c:\\users\\anurag\\documents\\visual studio 2015\\Projects\\EXCELTOSQL\\EXCELTOSQL\\hindiregion\\hindiregion.xls");

            string conString = string.Empty;
            string extension = Path.GetExtension(FileUpload1.PostedFile.FileName);
            switch (extension)
            {
                case ".xls": 
                    conString = ConfigurationManager.ConnectionStrings["Excel03ConString"].ConnectionString;
                    break;
                case ".xlsx": 
                    conString = ConfigurationManager.ConnectionStrings["Excel07+ConString"].ConnectionString;
                    break;
            }

            conString = string.Format(conString, excelPath);
            using (OleDbConnection excel_con = new OleDbConnection(conString))
            {
                excel_con.Open();
                string sheet1 = excel_con.GetOleDbSchemaTable(OleDbSchemaGuid.Tables, null).Rows[0]["unicodeexcel"].ToString();
                DataTable unicodeexcel = new DataTable();

                ////[OPTIONAL]: It is recommended as otherwise the data will be considered as String by default.
                //dtExcelData.Columns.AddRange(new DataColumn[2] { new DataColumn("Name", typeof(string)),
                //new DataColumn("Mangalregion",typeof(String)) });

                using (OleDbDataAdapter oda = new OleDbDataAdapter("SELECT * FROM [" + hindiregion + "]", excel_con))
                {
                    oda.Fill(unicodeexcel);
                }
                excel_con.Close();

                string consString = ConfigurationManager.ConnectionStrings["constr"].ConnectionString;
                using (SqlConnection con = new SqlConnection(consString))
                {
                    using (SqlBulkCopy sqlBulkCopy = new SqlBulkCopy(con))
                    {
                        
                        sqlBulkCopy.DestinationTableName = "UnicodeExcel";

                        sqlBulkCopy.ColumnMappings.Add("Name", "Name");
                        sqlBulkCopy.ColumnMappings.Add("Mangalregion", "Mangalregion");
                        con.Open();
                        sqlBulkCopy.WriteToServer(unicodeexcel);
                        con.Close();
                    }
                }
            }
        }
    }
}