强制将路径中的Swashbuckle参数设置为必需

public IHttpActionResult Get(int id, [Required] string name)
{
    // API逻辑
}

config.EnableSwagger(c =>
{
    // 其他配置项

    c.OperationFilter<RequiredParametersFilter>();
})
.EnableSwaggerUi();

public class RequiredParametersFilter : IOperationFilter
{
    public void Apply(Operation operation, SchemaRegistry schemaRegistry, ApiDescription apiDescription)
    {
        if (operation.parameters == null)
            return;

        foreach (var parameter in operation.parameters)
        {
            var description = apiDescription.ParameterDescriptions.FirstOrDefault(p => p.Name == parameter.name);
            if (description != null)
            {
                var isRequired = description.ParameterDescriptor.GetCustomAttributes<RequiredAttribute>().Any();
                parameter.required = isRequired;
            }
        }
    }
}