C# Web实现文件上传的示例详解
作者:大阳光男孩
这篇文章主要为大家详细介绍了C# Web实现文件上传的相关知识,文中的示例代码讲解详细,具有一定的学习价值,感兴趣的小伙伴可以跟随小编一起学习一下
1.第一种上传方式,基本通用于.net所有的框架
[HttpPost] [Route("Common/uploadFile1")] public string uploads() { HttpContextBase context = (HttpContextBase)Request.Properties["MS_HttpContext"];//获取传统context HttpRequestBase request = context.Request;//定义传统request对象 HttpFileCollectionBase files = request.Files; string fileSuffix = Path.GetExtension(files[0].FileName).ToLower(); string fileId = Guid.NewGuid().ToString(); string dateKey = DateTime.Now.ToString("yyyyMMdd"); string savaPath, uri; uri = @"/fileData/rest/" + dateKey + @"/"; savaPath = request.MapPath(uri); if (!Directory.Exists(savaPath)) { Directory.CreateDirectory(savaPath); } try { files[0].SaveAs(savaPath + fileId + fileSuffix); return uri + fileId + fileSuffix; }catch (Exception ex){ return ex.Message; } }
2.WebAPI可以用这个来,但是在低一点的版本没有IFormFile 这个对象
/// <summary> /// 通用文件上传接口 /// </summary> /// <param name="file"></param> /// <returns></returns> [HttpPost] [Route("Common/uploadFile2")] public async Task<Axios<string>> upload(IFormFile file) { string fileSuffix = Path.GetExtension(file.FileName).ToLower(); string fileId = Guid.NewGuid().ToString(); string dateKey = DateTime.Now.ToString("yyyyMMdd"); string savaPath,uri; uri = @"/fileData/rest/" + dateKey + @"/"; savaPath = Path.Combine(Directory.GetCurrentDirectory(), uri); if (!Directory.Exists(savaPath)){Directory.CreateDirectory(savaPath);} //创建特定名称的文件流 await using var stream = new FileStream(savaPath + fileId + fileSuffix, FileMode.Create); try { //上传文件 await file.CopyToAsync(stream); stream.Flush(); return Axios<string>.ok(uri + fileId + fileSuffix); } catch (Exception ex) { //上传异常处理 return Axios<string>.fail(ex.Message); }
3.上传方式,可以用于.netCore MVC方式的文件上传
[HttpPost] public JsonResult uploadX(HttpPostedFileBase file) { String suffix = file.FileName.Substring(file.FileName.LastIndexOf(".", StringComparison.Ordinal)); string fileName = Guid.NewGuid().ToString().Replace("-", "") + suffix; string uri = string.Format("{0}/{1}/{2}/", "fileData", "rest", DateTime.Now.Year+""+DateTime.Now.Month +""+ DateTime.Now.Day); string filePath = Server.MapPath(string.Format("~/{0}",uri)); if (!Directory.Exists(filePath)) { Directory.CreateDirectory(filePath); } file.SaveAs(Path.Combine(filePath, fileName)); return Json(uri + fileName); }
注:以上就是三种文件上传的方式,可以采用第一种方式,兼容性好
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