ASP.Net Core中关于WebApi几种版本控制对比详解（图）(2)-木庄网络博客

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public class NameSpaceVersionRoutingConvention:IApplicationModelConvention
  {
    private readonly string apiPrefix;
    private const string urlTemplate = "{0}/{1}/{2}";
    public NameSpaceVersionRoutingConvention(string apiPrefix = "api")
    {
      this.apiPrefix = apiPrefix;
    }
 
    public void Apply(ApplicationModel application)
    {
      foreach (var controller in application.Controllers)
      {
         
        var hasRouteAttribute = controller.Selectors
        .Any(x => x.AttributeRouteModel != null);
        if (!hasRouteAttribute)
        {
          continue;
        }
        var nameSpaces = controller.ControllerType.Namespace.Split('.');
        //获取namespace中版本号部分
        var version = nameSpaces.FirstOrDefault(x => Regex.IsMatch(x, @"^v(\d+)$"));
        if (string.IsNullOrEmpty(version))
        {
          continue;
        }
        string template = string.Format(urlTemplate, apiPrefix, version,
        controller.ControllerName);
        controller.Selectors[0].AttributeRouteModel = new AttributeRouteModel()
        {
          Template = template
        };
      }
    }
  }