using System;
using System.Collections.Generic;
using System.Text;
using System.Data;

using System.Windows.Forms;
using System.IO;

namespace PDAForm.Comm
{
    public class MyAppconfig
    {
        private static DataSet dsData = null;
        private static string patch = string.Empty;
        static MyAppconfig()
        {
            try
            {
                patch = MyFileManager.GetApplicationPath() + @"PDAForm.xml";
                dsData = new DataSet();

                if (!File.Exists(patch))
                {
                    dsData = new DataSet();

                    DataTable dtConfig = new DataTable("ConfigList");
                    dtConfig.Columns.Add("Name");
                    dtConfig.Columns.Add("Value");

                    dsData.Tables.Add(dtConfig);
                    dsData.WriteXml(patch);
                }
                else
                {
                    dsData.ReadXml(patch);
                }
            }
            catch { }
        }

        public static string GetValue(string name)
        {
            try
            {
                DataRow[] drs = dsData.Tables[0].Select("Name='" + name.Trim() + "'");
                if (drs.Length > 0)
                {
                    return drs[0]["Value"].ToString().Trim();
                }
                else
                {
                    return "";
                }
            }
            catch
            {
                return "";
            }

        }

        public static void SetValue(string name, string configvalue)
        {
            try
            {
                DataRow[] drs = dsData.Tables[0].Select("Name='" + name.Trim() + "'");

                if (drs.Length == 0)
                {
                    DataRow dr = dsData.Tables[0].NewRow();
                    dr["Name"] = name;
                    dr["Value"] = configvalue;
                    dsData.Tables[0].Rows.Add(dr);
                }
                else
                {
                    drs[0]["Value"] = configvalue;
                }

                dsData.WriteXml(patch);
            }
            catch { }
        }

        private static DataTable GetTable()
        {
            if (dsData != null)
            {
                return dsData.Tables[0];
            }
            else
            {
                return null;
            }
        }

        private static void Save()
        {
            try
            {
                dsData.WriteXml(patch);
            }
            catch { }
        }

    }
}