电报机器人下载图像文件 [英] Telegram Bot download image file

问题描述

我正在尝试使用我的机器人下载文件(图像)，但是当我使用getFile下载图像(成功完成)后，收到的图像很小1.7 kb，但比移动设备上的图像大电话

I'm trying to download file (image ) using my bot, but when I download the image ( which is done successfully ) after using getFile, the image I received is very small 1.7 kb while it's bigger than that on my mobile phone

推荐答案

这是旧文章.但是，由于没有足够的文档说明如何在电报bot中下载文件，因此任何人都想知道，这就是应该怎么做(一种方法):

This is an old post. But since there is not a good documentation on how you should download file in telegram bot, for anyone wondering, that's how you should do it(One way of it):

DownloadFile(message.Photo[message.Photo.Length - 1].FileId, @"c:\photo.jpg");

其中:

    private static async void DownloadFile(string fileId, string path)
    {
        try
        {
            var file = await Bot.GetFileAsync(fileId);

            using (var saveImageStream = new FileStream(path, FileMode.Create))
            {
                await file.FileStream.CopyToAsync(saveImageStream);
            }
        }
        catch (Exception ex)
        {
            Console.WriteLine("Error downloading: " + ex.Message);
        }
    }

message.Photo[message.Photo.Length - 1]是message.Photo数组中的最后一个元素，其中包含最高质量的图像数据.显然，您也可以使用DownloadFile下载其他类型的文件(例如message.Document).

The message.Photo[message.Photo.Length - 1] is the last element in message.Photo array, which contains the highest quality image data. Obviously you can use DownloadFile to download other kind of files(for example message.Document) as well.

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