文件上传有两种方式:WEB上传和FTP上传。
本文主要介绍WEB上传的几种方式。
1、相关代码
///
/// 上传文件
///
/// 上传的文件
/// 要存储的文件夹
///
[HttpGet("Upload")]
public async Task<FileMessage> UploadFileAsync(IFormFile file, string fold)
{
string fileName = file.FileName;
string path = Directory.GetCurrentDirectory() + @"/Upload/" + fold + "/";
if (!Directory.Exists(path))
{
Directory.CreateDirectory(path);
}
string argumentName = DateTime.Now.ToString("yyyyMMddHHmmssfff") + await FileHelp.GetFileSuffixAsync(file.FileName);
string fileSize = Math.Round((decimal)file.Length / 1024, 2) + "k";
string filePath = Path.Combine(path, argumentName);
try
{
using (FileStream stream = new FileStream(filePath, FileMode.Create))
{
await file.CopyToAsync(stream);
}
return FileMessage.CreateNew(fileName, argumentName, fileSize, 1, "文件上传成功");
}
catch (Exception e)
{
return FileMessage.CreateNew(fileName, argumentName, fileSize, -1, "文件上传失败:" + e.Message);
}
}
2、运行程序
1、相关代码
[HttpGet("UploadMul")]
public async Task<List<FileMessage>> UploadFilesAsync(IFormFileCollection files, string fold)
{
string path = Directory.GetCurrentDirectory() + @"/Upload/" + fold + "/";
if (!Directory.Exists(path))
{
Directory.CreateDirectory(path);
}
List<FileMessage> messages = new List<FileMessage>();
foreach (var file in files)
{
string fileName = file.FileName;
string argumentName = DateTime.Now.ToString("yyyyMMddHHmmssfff") + await FileHelp.GetFileSuffixAsync(file.FileName);
string fileSize = Math.Round((decimal)file.Length / 1024, 2) + "k";
string filePath = Path.Combine(path, argumentName);
try
{
using (FileStream stream = new FileStream(filePath, FileMode.Create))
{
await file.CopyToAsync(stream);
}
messages.Add(FileMessage.CreateNew(fileName, argumentName, fileSize, 1, "文件上传成功"));
}
catch (Exception e)
{
messages.Add(FileMessage.CreateNew(fileName, argumentName, fileSize, -1, "文件上传失败,失败原因:" + e.Message));
}
}
return messages;
}
2、运行程序
1、相关代码
[Route("api/[controller]")]
[ApiController]
public class HomeController: ControllerBase
{
private readonly string createName = "";
private readonly IWebHostEnvironment _env;
private readonly ILogger<HomeController> _logger;
public HomeController(IWebHostEnvironment env,
ILogger<HomeController> logger)
{
_env = env;
_logger = logger;
}
///
/// 下载附件
///
/// 文件名称
///
[HttpGet("download")]
public async Task<FileStreamResult> Download([FromQuery] string fileName)
{
try
{
string rootPath = _env.ContentRootPath + @"/Upload/ManageProtocolFile";
string filePath = Path.Combine(rootPath, fileName);
var stream = System.IO.File.OpenRead(filePath);
string contentType = await GetFileContentTypeAsync(fileName);
_logger.LogInformation("用户:" + createName + "下载后台客户协议附件:" + request.FileName);
return File(stream, contentType, fileName);
}
catch (Exception e)
{
_logger.LogError(e, "用户:" + createName + "下载后台客户协议附件出错,出错原因:" + e.Message);
throw new Exception(e.ToString());
}
}
}
2、运行程序
1、获取文件后缀
///
/// 获取文件后缀
///
/// 文件名称
///
public async static Task<string> GetFileSuffixAsync(string fileName)
{
return await Task.Run(() =>
{
string suffix = Path.GetExtension(fileName);
return suffix;
});
}
2、获取ContentType属性
///
/// 获取文件ContentType
///
/// 文件名称
///
public async static Task<string> GetFileContentTypeAsync(string fileName)
{
return await Task.Run(() =>
{
string suffix = Path.GetExtension(fileName);
var provider = new FileExtensionContentTypeProvider();
var contentType = provider.Mappings[suffix];
return contentType;
});
}
3、FileMessage
public class FileMessage
{
///
/// 原文件名称
///
public string FileName { get; set; }
///
/// 附件名称(协议或其他要进行数据库保存与模型绑定的命名)
///
public string ArgumentName { get; set; }
///
/// 文件大小(KB)
///
public string FileSize { get; set; }
///
/// -1:上传失败 0:等待上传 1:已上传
///
public int FileStatus { get; set; }
///
/// 上传结果
///
public string UploadResult { get; set; }
///
/// 创建实例
///
/// 原文件名称
/// (新)附件名称
/// 大小
/// 文件状态
///
public static FileMessage CreateNew(string fileName,
string argumentName,
string fileSize,
int fileStatus,
string uploadResult)
{
return new FileMessage()
{
FileName = fileName,
ArgumentName = argumentName,
FileSize = fileSize,
FileStatus = fileStatus,
UploadResult = uploadResult
};
}
}