2025-10-19 17:37:09 +08:00

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# IP2Region.Net
.NET client library for IP2Region
## Installation
Install the package with [NuGet](https://www.nuget.org/packages/IP2Region.Net)
```bash
Install-Package IP2Region.Net
```
## Usage
```csharp
using IP2Region.Net.Abstractions;
using IP2Region.Net.XDB;
ISearcher searcher = new Searcher(CachePolicy , "your xdb file path");
```
### Cache Policy Description
| Cache Policy | Description | Thread Safe |
|-------------------------|------------------------------------------------------------------------------------------------------------|-------------|
| CachePolicy.Content | Cache the entire `xdb` data. | Yes |
| CachePolicy.VectorIndex | Cache `vecotorIndex` to speed up queries and reduce system io pressure by reducing one fixed IO operation. | Yes |
| CachePolicy.File | Completely file-based queries | Yes |
### XDB File Description
Generate using [maker](https://github.com/lionsoul2014/ip2region/tree/master/maker/csharp), or [download](https://github.com/lionsoul2014/ip2region/blob/master/data/ip2region.xdb) pre-generated xdb files
## ASP.NET Core Usage
```csharp
services.AddIP2RegionService("your xdb file path", cachePolicy: CachePolicy.Content);
```
NET6/7
```csharp
provider.GetRequiredService<ISearcher>()
```
NET8+ support keyed service
```csharp
provider.GetRequiredKeyedService<ISearcher>("IP2Region.Net");
```
## Performance
``` ini
BenchmarkDotNet=v0.13.2, OS=macOS 13.4.1 (c) (22F770820d) [Darwin 22.5.0]
Apple M1, 1 CPU, 8 logical and 8 physical cores
.NET SDK=7.0.306
[Host] : .NET 6.0.20 (6.0.2023.32017), Arm64 RyuJIT AdvSIMD
DefaultJob : .NET 6.0.20 (6.0.2023.32017), Arm64 RyuJIT AdvSIMD
```
| Method | Mean | Error | StdDev |
|------------------------ |-------------:|----------:|----------:|
| CachePolicy_Content | 58.32 ns | 0.182 ns | 0.170 ns |
| CachePolicy_File | 16,417.56 ns | 50.569 ns | 47.302 ns |
| CachePolicy_VectorIndex | 9,348.11 ns | 38.492 ns | 65.363 ns |
## Contributing
Pull requests are welcome. For major changes, please open an issue first to discuss what you would like to change.
Please make sure to update tests as appropriate.
## License
[Apache License 2.0](https://github.com/lionsoul2014/ip2region/blob/master/LICENSE.md)