c# -将附件添加到不一致的Webhook消息

using System;
using System.Net.Http;
using System.Net.Http.Headers;
using System.Threading.Tasks;

public async Task SendMessageWithAttachment(string webhookUrl, string message, string attachmentPath)
{
    using (var httpClient = new HttpClient())
    {
        using (var content = new MultipartFormDataContent())
        {
            // 添加文本消息
            var messageContent = new StringContent(message);
            content.Add(messageContent, "text");

            // 添加附件
            var fileContent = new ByteArrayContent(await File.ReadAllBytesAsync(attachmentPath));
            fileContent.Headers.ContentDisposition = new ContentDispositionHeaderValue("attachment")
            {
                FileName = System.IO.Path.GetFileName(attachmentPath)
            };
            content.Add(fileContent, "file");

            // 发送Webhook请求
            var response = await httpClient.PostAsync(webhookUrl, content);

            // 处理响应
            if (response.IsSuccessStatusCode)
            {
                Console.WriteLine("Webhook消息发送成功！");
            }
            else
            {
                Console.WriteLine($"Webhook消息发送失败：{response.StatusCode}");
            }
        }
    }
}

string webhookUrl = "https://your.webhook.url";
string message = "这是一条包含附件的Webhook消息";
string attachmentPath = "C:\\path\\to\\attachment.txt";

await SendMessageWithAttachment(webhookUrl, message, attachmentPath);