this.MainSqlConnection.Open();
FileStream fs = new FileStream(SourceFilePath, FileMode.Open, FileAccess.Read);
Byte[] b = new Byte[fs.Length];
fs.Read(b,  0 , b.Length);
fs.Close();
SqlParameter P = new SqlParameter( "@file" , System.Data.SqlDbType.Image,  b.Length, System.Data.ParameterDirection.Input, false,  0 ,  0 , null, System.Data.DataRowVersion.Current, b);
this.spSendFile.Parameters.Add(P); 
this.spSendFile.Parameters[ "@name" ].Value = name;
this.spSendFile.Parameters[ "@extens" ].Value = extens;
this.spSendFile.Parameters[ "@client_id" ].Value = client_id;
this.spSendFile.ExecuteNonQuery();
this.MainSqlConnection.Close();