一、流程如下

 C#代码：

using Microsoft.Playwright;
using Newtonsoft.Json;
using System;
using System.IO;
using System.Net.Http;
using System.Text;
using System.Xml.Linq;

namespace TestProject3
{
    [TestClass]
    public class UnitTest1 : PageTest
    {
        [TestMethod]
        public async Task HomepageHasPlaywrightInTitleAndGetStartedLinkLinkingtoTheIntroPage()
        {
            await using var browser = await Playwright.Chromium.LaunchAsync(new BrowserTypeLaunchOptions
            {
                Headless = false,
            });
            var context = await browser.NewContextAsync();
            var page = await context.NewPageAsync();
            await page.GotoAsync("https://boot3.jeecg.com/login?redirect=/dashboard/analysis");
            await page.GetByRole(AriaRole.Textbox, new() { NameString = "账号" }).ClickAsync();
            await page.GetByRole(AriaRole.Textbox, new() { NameString = "账号" }).FillAsync("jeecg");
            await page.GetByRole(AriaRole.Textbox, new() { NameString = "账号" }).PressAsync("Tab");
            await page.GetByRole(AriaRole.Textbox, new() { NameString = "密码" }).FillAsync("jeecg#123456");
            await page.GetByRole(AriaRole.Textbox, new() { NameString = "密码" }).PressAsync("Tab");

            while (true)
            {
                var imageEle = page.Locator("#app > div > div:nth-child(4) > div > div > div > div.aui-formBox > div > div.aui-form-box > form > div > div:nth-child(3) > div.aui-code > img");
                var codePngName = DateTime.Now.ToFileTime().ToString() + ".png";
                var codePngPath = Path.Combine(AppDomain.CurrentDomain.BaseDirectory, "ScreenshotImges", codePngName);
                await imageEle.ScreenshotAsync(new LocatorScreenshotOptions { Path = codePngPath });

                //验证码图片识别
                var address = "http://localhost:5252/api/hellos/upload";
                var httpClient = new HttpClient();
                var fileInfo = new FileInfo(codePngPath);
                using (var stream = fileInfo.OpenRead())
                {
                    var content = new MultipartFormDataContent
                {
                    { new StreamContent(stream,(int)stream.Length), "file", fileInfo.Name }
                };
                    var httpResponseMessage = await httpClient.PostAsync(address, content);
                    if (httpResponseMessage.StatusCode == System.Net.HttpStatusCode.OK)
                    {
                        var jsonResult = await httpResponseMessage.Content.ReadAsStringAsync();
                    }
                }

                //获取识别结果
                var code = "";
                address = "http://localhost:5252/api/hellos/page";

                var jsonContent = new StringContent(Newtonsoft.Json.JsonConvert.SerializeObject(new
                {
                    PageIndex = 1,
                    PageSize = 1,
                    Name = ""
                }), Encoding.UTF8, "application/json");
                var responseMessage = await httpClient.PostAsync(address, jsonContent);
                if (responseMessage.StatusCode == System.Net.HttpStatusCode.OK)
                {
                    var jsonResult = await responseMessage.Content.ReadAsStringAsync();
                    var ocrResponse = Newtonsoft.Json.JsonConvert.DeserializeObject<OcrResponse>(jsonResult);
                    code = ocrResponse.Data.Items.First().Name;
                }

                await page.GetByRole(AriaRole.Textbox, new() { NameString = "验证码" }).FillAsync(code);
                System.Threading.Thread.Sleep(1000);
                await page.GetByRole(AriaRole.Button, new() { NameString = "登 录" }).ClickAsync();

                try
                {
                    await page.WaitForURLAsync("https://boot3.jeecg.com/dashboard/analysis", new PageWaitForURLOptions { Timeout =1000 });
                }
                catch (Exception ex)
                {
                }

                if (page.Url == "https://boot3.jeecg.com/dashboard/analysis")
                {
                    break;
                }
            }
        }
    }


    public class OcrResponse
    {
        public bool Success { get; set; }
        public OcrData Data { get; set; }

        public string Message { get; set; }
    }

    public class OcrData
    {
        [JsonProperty("data")]
        public List<OcrItem> Items { get; set; }
    }

    public class OcrItem
    {
        public string Name { get; set; }
    }

}