c#

IP2Region C# Client

How To Use

1.Install from Nuget. Support .Net Framework (>=4.5) And netstandard 2.0(.net core)

Install-Package IP2Region

2.Init DbSearcher with the newest DBFile Downloaded into your project, and invoke your search methods as below:

using (var _search = new DbSearcher(Environment.CurrentDirectory + @"\DB\ip2region.db"))
{
    _search.MemorySearch("183.192.62.65").Region;
    _search.BinarySearch("183.192.62.65").Region;
    _search.BtreeSearch("183.192.62.65").Region;
}

For async methods (Methods with the suffix "Async"), just put them with async and await. If you don't need the SynchronizedContext, please use ConfigureAwait(false). For more about this, please read https://msdn.microsoft.com/en-us/magazine/jj991977.aspx.

 public async Task SearchAsync_Test()
        {
            // We don't need the synchronizeContext, so just set to false. 
            // So as for BinarySearchAsync and BtreeSearchAsync
            var memResult = await _search.MemorySearchAsync("183.192.62.65").ConfigureAwait(false);
        }

Test Result(From /IP2Region.Test.Benchmark)

Method	Mean	Error	StdDev	Rank
MemorySearch	10.66 us	0.1424 us	0.1332 us	1
MemorySearch_Async	10.90 us	0.2060 us	0.2023 us	2
BinarySearch	52.22 us	0.6403 us	0.5347 us	5
BinarySearch_Async	53.03 us	1.0271 us	0.9608 us	6
BtreeSearch	19.05 us	0.2464 us	0.2305 us	3
BtreeSearch_Async	19.40 us	0.3820 us	0.6690 us	4

Because the speed of the program lookup has been fast, the asynchronous method here is just the packaging of the synchronization method, the essence is the synchronization method, the asynchronous method is not recommended, and asynchronous will bring the performance loss, unless you need the asynchronous call format.