C# RestSharp上传和下载图片-YES开发框架网

C# RestSharp上传和下载图片

上传图片到服务器

C# RestSharp上传图片服务器代码

C# 全选

/// <summary>
/// SEO图片上传
/// </summary>
/// <param name="file"></param>
/// <returns></returns>
[HttpPost]
public HDFile SEOImage(IFormFile file)
{
	var dir = PathProvider.GetRootSEOPath();

	var data = SaveImage(file, dir, false, false);
	string tag = "seo";
	AddDB(data, tag);

	return new HDFile(data.fileName, $"/images/{tag}/{data.fileName}", "");



}

ImageInfoModel SaveImage(IFormFile file, string dir, bool enableImageMask, bool compression = true)
{
	//如果路径不存在，创建路径
	if (!Directory.Exists(dir))
		Directory.CreateDirectory(dir);

	ImageInfoModel data = new ImageInfoModel();
	data.relativePath = RelativePath(dir);


	var strDateTime = DateTime.Now.ToString("yyMMddhhmmssfff"); //取得时间字符串
	var strRan = Convert.ToString(new Random().Next(100, 999)); //生成三位随机数
	data.fileID = strDateTime + strRan;

	using (var memoryStream = new MemoryStream())
	{
		file.CopyTo(memoryStream);

		using (var img = Image.FromStream(memoryStream))
		{
			//文件后缀
			data.extension = "." + img.RawFormat.ToString().ToLower();
			string filename = dir + "\\" + data.fileName;
			if (img.RawFormat.Equals(ImageFormat.Jpeg)
				 || img.RawFormat.Equals(ImageFormat.Bmp)
				 || img.RawFormat.Equals(ImageFormat.Png)
				)
			{
				// 压缩图片？
				if (compression)
				{
					ImageLibrary.SaveByCompression(img, filename, 90);
				}
			}

			img.Save(filename);
		}
	}


	return data;

}

C# RestSharp上传图片客户端代码

C# 全选

using (OpenFileDialog openFileDialog = new OpenFileDialog())
{
	openFileDialog.Filter = "(*.jpg,*.png,*.jpeg,*.bmp,*.gif)|*.jgp;*.png;*.jpeg;*.bmp;*.gif";
	if (openFileDialog.ShowDialog() == DialogResult.OK)
	{
		string url = txt_host.Text + "/api/upload/" + cmb_Type.SelectedValue;
		RestClient client = new RestClient(url);
		client.Timeout = -1;
		var request = new RestRequest(Method.POST);
		foreach (var v in cookies)
		{
			request.AddParameter(v.Name, v.Value, ParameterType.Cookie);
		}
		string imgFileName = openFileDialog.FileName;
		//string imgName = System.IO.Path.GetFileName(imgFileName);
		request.AddFile("file", imgFileName);
		IRestResponse response = client.Execute(request);
		Console.WriteLine(response.Content);
	}
}

下载图片

方法一，文件名可以从响应信息中分析

C# 全选

RestClient client = new RestClient(txt_ImageURL.Text);
client.ClearHandlers();
client.AddHandler("*", () => { return new JsonDeserializer(); });
RestRequest request = new RestRequest(Method.GET);

IRestResponse response = await client.ExecuteAsync(request);
if (response.StatusCode == System.Net.HttpStatusCode.OK)
{
	// Read bytes
	byte[] fileBytes = response.RawBytes;
	var headervalue = response.Headers.FirstOrDefault(x => x.Name == "Content-Disposition")?.Value;
	string fileName = "";
	if (headervalue != null)
	{
		// 有返回文件名
		string contentDispositionString = Convert.ToString(headervalue);
		ContentDisposition contentDisposition = new ContentDisposition(contentDispositionString);
		fileName = contentDisposition.FileName;
	}
	else
	{
		// 没有文件名，根据URL获得文件名
		string _str = response.ResponseUri.Segments[response.ResponseUri.Segments.Length - 1];
		if (System.IO.Path.GetExtension(_str) != "")
			fileName = _str;
	}
	// 保存文件到磁盘
	string fileFullName = "D:\\" + fileName;
	using (var writer = File.OpenWrite(fileFullName))
	{
		writer.Write(fileBytes, 0, fileBytes.Length);
	}
}

方法二：需要预先指定文件名

C# 全选

RestClient client = new RestClient(txt_ImageURL.Text);
var req = new RestRequest(Method.GET);
req.ResponseWriter = responseStream =>
{
	using (responseStream)
	{
		// 保存文件到磁盘
		string fileFullName = "D:\\test.png";
		using (var writer = File.OpenWrite(fileFullName))
		{
			responseStream.CopyTo(writer);
		}


	}
};
var response = client.DownloadData(req);