Demo.WindowsForms/Source/SQLiteIpCache.cs

这里只显示每个文件的开头 60 行。登录后可以解锁完整代码。

微信扫码关注公众号，代码整理好后第一时间通知你。

namespace Demo.WindowsForms
{
#if SQLite
   using System.Collections.Generic;
   using System.Data.Common;
#if !MONO
   using System.Data.SQLite;
#else
   using SQLiteConnection=Mono.Data.SqliteClient.SqliteConnection;
   using SQLiteTransaction=Mono.Data.SqliteClient.SqliteTransaction;
   using SQLiteCommand=Mono.Data.SqliteClient.SqliteCommand;
   using SQLiteDataReader=Mono.Data.SqliteClient.SqliteDataReader;
   using SQLiteParameter=Mono.Data.SqliteClient.SqliteParameter;
#endif
   using System.IO;
   using System.Text;
   using System;
   using System.Diagnostics;
   using System.Globalization;

   /// <summary>
   /// ultra fast cache system for tiles
   /// </summary>
   internal class SQLiteIpCache
   {
      string cache;
      string ipCache;
      string db;

      public string IpCache
      {
         get
         {
            return ipCache;
         }
      }

      /// <summary>
      /// local cache location
      /// </summary>
      public string CacheLocation
      {
         get
         {
            return cache;
         }
         set
         {
            cache = value;
            ipCache = cache + "IpGeoCacheDB" + Path.DirectorySeparatorChar;

            string dir = ipCache + Path.DirectorySeparatorChar;

            // make empty db
            {
               db = dir + "Data.ipdb";

               if(!File.Exists(db))
               {