我有一个swashbuckle swaggergen UI输出，看起来像：[！[put request][1]][1]
而且（由于某些原因），我不想使用典型的验证属性，而是在请求体中进行验证。我的容器名称是Azure Blob存储容器，因此它必须是3-63个字符，并匹配简单的正则表达式（没有大写字母，基本上是字母数字）。
我想修改用户界面也显示这些要求.所以，我写了一个操作过滤器和属性。我假设我想修改SwaggerParameters，在那里我注意到一个方便的模式，其中包含“MinLength”、“MaxLength”和“Pattern”等参数--换句话说，正是我想在UI上显示的内容。所以我修改了它。下面是输出：

"put": {
        "tags": [
          "Values"
        ],
        "summary": "API Operation – Create & Update\r\n::\r\nCreates a new content file entry in the containername provided.",
        "description": "If the container name has the word public in it, then the container\r\nshall be public otherwise the container, identified by the\r\ncontainername, shall be private. If the file, identified by the\r\nfilename parameter on the URI, already exists then the existing blob\r\nentry will be overwritten with the new fileData uploaded.",
        "operationId": "Put",
        "parameters": [
          {
            "name": "containername",
            "in": "path",
            "description": "The container the file resides in.",
            "required": true,
            "schema": {
              "maxLength": 63,
              "minLength": 3,
              "pattern": "^[a-z0-9]+(-[a-z0-9]+)*$",
              "type": "string"
            }
          },
          {
            "name": "fileName",
            "in": "path",
            "description": "The name of the file uploaded. This shall become the block blob Id.",
            "required": true,
            "schema": {
              "maxLength": 75,
              "minLength": 1,
              "pattern": "\\S",
              "type": "string"
            }
          }
        ],

字符串
问题是，UI看起来是一样的。我应该修改什么才能呈现这些值？
代码：

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text.Json;
using Microsoft.OpenApi.Any;
using Microsoft.OpenApi.Models;
using Swashbuckle.AspNetCore.SwaggerGen;
using static Foo.SwaggerParameterDescriptions;

namespace Foo
{
    [AttributeUsage(AttributeTargets.Method, AllowMultiple = true)]
    public class SwaggerPathParameterDescriptions : Attribute
    {
        public enum Description
        {
            Default,
            MinLength,
            MaxLength,
            Pattern
        }

        public string ParameterName { get; set; }
        public Dictionary<Description, dynamic> Settings { get; set; }

        public SwaggerPathParameterDescriptions(string parameterName, string json)
        {
            Dictionary<string, dynamic> dict = JsonSerializer
                .Deserialize<Dictionary<string, dynamic>>(json);

            Dictionary<Description, dynamic> settings = dict.Entries()
                       .ToDictionary(entry => (Description)Enum.Parse(typeof(Description), (string)entry.Key),
                                     entry => entry.Value);

            ParameterName = parameterName;
            Settings = settings;
        }

        public IEnumerable<SwaggerParameterSchemaDescription> GetSwaggerParameters()
        {
            return Settings.Keys.Select(key =>
                new SwaggerParameterSchemaDescription { ParameterName = key, Value = Settings[key] });
        }
    }

    public class SwaggerParameterSchemaDescription
    {
        public Description ParameterName { get; set; }
        public dynamic Value { get; set; }

        public void ApplyTo(OpenApiParameter param)
        {
            string representation = $"{Value}";
            switch (ParameterName)
            {
                case Description.Default:
                    param.Schema.Default = new OpenApiString(representation); // Path Parameters must be strings!
                    break;
                case Description.MinLength:
                    param.Schema.MinLength = Int32.Parse(representation);
                    break;
                case Description.MaxLength:
                    param.Schema.MaxLength = Int32.Parse(representation);
                    break;
                case Description.Pattern:
                    param.Schema.Pattern = representation;
                    break;
                default:
                    throw new InvalidOperationException();
            }
        }
    }

    public class AddSettings : IOperationFilter
    {
        public void Apply(OpenApiOperation operation, OperationFilterContext context)
        {
            foreach (var param in operation.Parameters)
            {
                var actionParam = context.ApiDescription.ActionDescriptor.Parameters.First(p => p.Name == param.Name);
                if (actionParam != null)
                {
                    context.MethodInfo
                        .GetCustomAttributes(true)
                        .OfType<SwaggerPathParameterDescriptions>()
                        .Where(p => p.ParameterName == param.Name)
                        .ToList()
                        .ForEach(customAttribute =>
                    {
                        foreach (SwaggerParameterSchemaDescription description in customAttribute.GetSwaggerParameters())
                        {
                            description.ApplyTo(param);
                        }
                    });
                }

            }
        }
    }
}

型
在Startup中：

services.AddSwaggerGen(c => {
                c.OperationFilter<AddSettings>();

型
然后像这样使用：

[HttpPut("{containername}/contentfiles/{fileName}")]
        [SwaggerPathParameterDescriptions("containername", "{\"MinLength\":3,\"MaxLength\":63,\"Pattern\":\"^[a-z0-9]+(-[a-z0-9]+)*$\"}")]
        [SwaggerPathParameterDescriptions("fileName", "{\"MinLength\":1,\"MaxLength\":75,\"Pattern\":\"\\\\S\"}")]
        [SwaggerResponseHeader(StatusCodes.Status201Created, "Location", "string", "Location of the newly created resource")]
        [ProducesResponseType(StatusCodes.Status201Created)]
        [ProducesResponseType(StatusCodes.Status204NoContent)]
        [ProducesResponseType(typeof(ErrorResponse), StatusCodes.Status400BadRequest)]
        [ProducesResponseType(typeof(ErrorResponse), StatusCodes.Status503ServiceUnavailable)]
        public ActionResult Put(string containername, string fileName, IFormFile fileData)

型
我的问题是它没有渲染。我还有更多的工作要做。还是我修改了错误的值？