一、 使用默认方法上传文件：
1、Action：
/// <summary> /// 上传文件 使用上传后的默认文件名称 /// 默认名称是BodyPart_XXXXXX，BodyPart_加Guid码 /// </summary> /// <returns></returns> [HttpPost, Route("Upload")] public async Task<string> Upload() { try { //web api 获取项目根目录下指定的文件下 var root = System.Web.Hosting.HostingEnvironment.MapPath("/Resource/Images"); var provider = new MultipartFormDataStreamProvider(root); //文件已经上传 但是文件没有后缀名 需要给文件添加后缀名 await Request.Content.ReadAsMultipartAsync(provider); foreach (var file in provider.FileData) { //这里获取含有双引号'" ' string filename = file.Headers.ContentDisposition.FileName.Trim('"'); //获取对应文件后缀名 string fileExt = filename.Substring(filename.LastIndexOf('.')); FileInfo fileinfo = new FileInfo(file.LocalFileName); //fileinfo.Name 上传后的文件路径 此处不含后缀名 //修改文件名 添加后缀名 string newFilename = fileinfo.Name + fileExt; //最后保存文件路径 string saveUrl = Path.Combine(root, newFilename); fileinfo.MoveTo(saveUrl); } return "success"; } catch (Exception ex) { throw ex; } }
2、html模拟代码：
<!DOCTYPE html> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8"/> <title></title> </head> <body> <h1>柠檬伙伴云</h1> <form action="/Test/Upload" method="post" enctype="multipart/form-data"> <input type="file" name="f1" /> <br /><br /> <input type="file" name="f2" /> <br /><br /> <input type="submit" value="上传图片" /> </form> </body> </html>
3、效果如下图：
上图就是上传后文件没有后缀名效果
对第一张没有后缀名添加后缀名的效果
二、修改上传文件后缀名
1、action:
/// <summary> /// 上传文件 修改上传文件名称 也不包含后缀名 /// </summary> /// <returns></returns> [HttpPost, Route("Upload2")] public async Task<string> Upload2() { try { //web api 获取项目根目录下指定的文件下 var root = System.Web.Hosting.HostingEnvironment.MapPath("/Resource/Images"); //对上传文件重新命名 根据需求对应修改文件名称 不包含后缀名 只是前缀名 var provider = new RenamingMultipartFormDataStreamProvider(root); //文件已经上传 但是文件没有后缀名 需要给文件添加后缀名 await Request.Content.ReadAsMultipartAsync(provider); foreach (var file in provider.FileData) { //这里获取含有双引号'" ' string filename = file.Headers.ContentDisposition.FileName.Trim('"'); //获取对应文件后缀名 string fileExt = filename.Substring(filename.LastIndexOf('.')); FileInfo fileinfo = new FileInfo(file.LocalFileName); //fileinfo.Name 上传后的文件路径 此处不含后缀名 //修改文件名 添加后缀名 string newFilename = fileinfo.Name + fileExt; //最后保存文件路径 string saveUrl = Path.Combine(root, newFilename); fileinfo.MoveTo(saveUrl); } return "success"; } catch (Exception ex) { throw ex; } }
2、RenamingMultipartFormDataStreamProvider 类：
using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Threading.Tasks; using System.Net.Http; using System.Net.Http.Headers; using System.IO; namespace Test.One.Common { public class RenamingMultipartFormDataStreamProvider : MultipartFormDataStreamProvider { /// <summary> /// 文件重命名 /// </summary> /// <param name="root"></param> public RenamingMultipartFormDataStreamProvider(string root) : base(root) { } /// <summary> /// 文件重命名 /// </summary> /// <param name="headers"></param> /// <returns></returns> public override string GetLocalFileName(HttpContentHeaders headers) { string fileName = headers.ContentDisposition.Name; if (!string.IsNullOrWhiteSpace(fileName)) { fileName = Guid.NewGuid().ToString(); } return fileName.Replace(""", string.Empty); } } }
3、html 模拟代码：
<!DOCTYPE html> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8"/> <title></title> </head> <body> <h1>柠檬伙伴云</h1> <form action="/Test/Upload2" method="post" enctype="multipart/form-data"> <input type="file" name="f1" /> <br /><br /> <input type="file" name="f2" /> <br /><br /> <input type="submit" value="上传图片" /> </form> </body> </html>
3、效果：
实例二：
api：
/// <summary> /// TestFile /// </summary> /// <returns></returns> [HttpPost,Route("TestFile")] public async Task<Result<bool>> TestFile() { Result<bool> result = new Result<bool>(); try { if (!Request.Content.IsMimeMultipartContent()) { result.ReturnCode = ResultCode.InvalidParam; result.Data = false; result.ReturnMsg = "请求数据不是multipart/form-data类型"; return result; } string root = HostingEnvironment.MapPath("/Resources/Templet/"); string date = DateTime.Now.ToString("yyyy-MM-dd"); string resourcePath = Path.Combine(root, date); if (!Directory.Exists(resourcePath)) { Directory.CreateDirectory(resourcePath); } var provider = new RenamingMultipartFormDataStreamProvider(resourcePath); // 接收数据，并保存文件 var bodyparts = await Request.Content.ReadAsMultipartAsync(provider); if (bodyparts.FormData.Count <= 0 || provider.FileData == null && !provider.FileData.Any()) { result.ReturnCode = ResultCode.InvalidParam; result.Data = false; result.ReturnMsg = "文件或参数不全，视频上传失败。"; return result; } UploadContactListFileModel uploadModel = new UploadContactListFileModel(); if (bodyparts.FormData.AllKeys.Contains("ContactListName")) { uploadModel.ContactListName = bodyparts.FormData["ContactListName"]; } foreach (MultipartFileData file in provider.FileData) { //上传的文件名 string name = file.Headers.ContentDisposition.FileName.Replace(""", ""); string extension = Path.GetExtension(name); if (extension == ".csv" || extension == ".xls" || extension == ".xlsx") { //修改文件名 string newFileName = Guid.NewGuid().ToString("N") + Path.GetExtension(name); string uploadPath = Path.Combine(resourcePath, newFileName); //保存文件 File.Move(file.LocalFileName, uploadPath); uploadModel.FilePath = uploadPath; break; } } } catch (Exception ex) { result.ReturnMsg = "服务器内部发生异常"; Logger.Error("SelfsController[AddVideos]", ex); } return result; }
model:
public class UploadContactListFileModel { /// <summary> /// FilePath /// </summary> public string FilePath { get; set; } /// <summary> /// ContactListName /// </summary> public string ContactListName { get; set; } /// <summary> /// IsError /// </summary> /// <returns></returns> public bool IsError() { return string.IsNullOrEmpty(FilePath) || string.IsNullOrEmpty(ContactListName); } }
html:
<form action="/Spread/External/TestFile" method="post" enctype="multipart/form-data"> <input type="text" name="ContactListName" value="ContactListName" /> <br /> <input type="file" name="upload" value="" /><br /> <input type="submit" name="name" value="上传" /> </form>