filescontrol.cs

手持式RFID及条码车辆识别系统手持机代码

using System;
using System.Collections.Generic;
using System.Text;
using System.IO;

namespace RFID_CAR
{
    class FilesControl
    {
        public const string gc_str_files_path = "\\My Documents";
        private const char m_c_field_separator = ',';

        public bool is_xcwj_txt()
        { 
            return File.Exists(gc_str_files_path+"\\xcwj.txt");
        }

        public bool findin_xcwj_txt(string str_uid,ref string str_record)
        {
            bool ret_b = false;
            string valid = "1";
            try
            {
                using (StreamReader stream = File.OpenText(gc_str_files_path + "\\xcwj.txt"))
                {
                    while (stream.Peek() >= 0)
                    {
                        string str = stream.ReadLine();
                        string[] pstr_fields = str.Split(m_c_field_separator);
                        if (string.Equals(pstr_fields[0], str_uid))
                            if (string.Equals(pstr_fields[2], valid ))
                            {
                                str_record = string.Copy(str);
                                ret_b = true;
                                break;
                            }
                    }
                    stream.Close();
                }
            }
            catch (Exception e_valid)
            {
                System.Windows.Forms.MessageBox.Show("err_valid:" + e_valid.Message);
            }
            return ret_b;
        }

        public bool write_scwj_txt(string str_input)
        {
            
            if(!File.Exists(gc_str_files_path+"\\scwj.txt"))
                File.CreateText(gc_str_files_path+"\\scwj.txt");
            try
            {
                StreamWriter  stream = File.AppendText(gc_str_files_path+"\\scwj.txt");
                stream.WriteLine (str_input);
                stream.Close();
            }
            catch(Exception e)
            {
                return false;
            }
            return true;
        }
    }
}