WebApi上传文件 -云博客

WebApi上传文件

# windos 2024-05-05 17:23 0 20 来源：云博客

使用webapi上传文件需要引用ICSharpCode.SharpZipLib.Zip;

前端代码示例：

 1 <!DOCTYPE html> 2 <html> 3 <head> 4 <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> 5 <title></title> 6 <meta charset="utf-8" /> 7  8 <script src="Resource/jquery-1.10.2.min.js"></script> 9 <script>10  $(function () {11  $("#upload").click(function () {12  $("#imgWait").show();13 var formData = new FormData($(‘form‘)[0]);14 // formData.append("myfile", document.getElementById("file1").files[0]);15  $.ajax({16  url: "https://localhost:81/api/file/uploadfile/111",17  type: "POST",18  data: formData,19 /**20  *必须false才会自动加上正确的Content-Type21 */22  contentType: false,23 /**24  * 必须false才会避开jQuery对 formdata 的默认处理25  * XMLHttpRequest会对 formdata 进行正确的处理26 */27  processData: false,28  success: function (data) {29 if (data.status == "true") {30  alert("上传成功！");31  }32 if (data.status == "error") {33  alert(data.msg);34  }35  $("#imgWait").hide();36  },37  error: function (data) {38  alert("上传失败！");39  $("#imgWait").hide();40  }41  });42  });43  });44 </script>45 46 </head>47 <body>48 <form id="uploadForm" enctype="multipart/form-data">49 选择文件:<input type="file" id="file1" name="file" /><br />50 <input type="button" id="upload" value="上传" />51 <img src="wait.gif" style="display:none" id="imgWait" />52 </form>53 </body>54 55 </html>

前后端分离，处理跨域访问，在web.config文件的<system.webserver></system.webserver>节点下添加跨域设置

1 <httpProtocol>2 <customHeaders>3 <add name="Access-Control-Allow-Origin" value="*" />4 <add name="Access-Control-Allow-Methods" value="GET,POST,OPTIONS"/>5 <add name="Access-Control-Allow-Headers" value="Content-Type, Accept" />6 </customHeaders>7 </httpProtocol>

后端代码：

 1 /// <summary> 2 /// 上传文件 3 /// </summary> 4 /// <returns></returns> 5  [HttpPost] 6 [Route("api/fileinfo/uploadfile/{folderpath}/{bussinessid}")] 7 public async Task<string> UploadFile(string folderpath, string bussinessid) 8  { 9 string rtValue = string.Empty; 10 ErrorCode code = null; 11 try 12  { 13 IFileInfoLogic logic = LZFactory<IFileInfoLogic>.CreateInstance("Lz.Product.ELManage.BLL.FileInfoLogic,Lz.Product.ELManage.BLL"); 14 if (!bussinessid.Equals("0")) 15  { 16 bool flag = logic.DeleteFile(bussinessid); 17  } 18  19 if (!Request.Content.IsMimeMultipartContent("form-data")) 20  { 21 throw new HttpResponseException(HttpStatusCode.UnsupportedMediaType); 22  } 23 //文件上传相对路径 24 string releativePath = string.Format("/Resource/{0}/", folderpath); 25 string temprelativepath = "/Resource/temp/"; 26 //文件上传物理路径 27 string uploadFolderPath = HostingEnvironment.MapPath(releativePath); 28 string temppath= HostingEnvironment.MapPath(temprelativepath); 29  30 //如果路径不存在，创建路径  31 if (!Directory.Exists(uploadFolderPath)) 32  Directory.CreateDirectory(uploadFolderPath); 33 if (!Directory.Exists(temppath)) 34  Directory.CreateDirectory(temppath); 35 string keyId = Guid.NewGuid().ToString(); 36 //执行provider文件上传成功 37 var provider = new WithExtensionMultipartFormDataStreamProvider(temppath, keyId); 38  39 // Read the form data.  40 await Request.Content.ReadAsMultipartAsync(provider); 41  42 // This illustrates how to get the file names.  43 string fileName = string.Empty; 44  45 //FileInfoLogic logic = new FileInfoLogic(); 46 //可处理批量上传 47 foreach (var file in provider.FileData) 48  { 49 //处理上传文件可能存在文件名相同的情况 50 //完整路径 51 string fullpath = file.LocalFileName; 52 //获取文件名 53 fileName = Path.GetFileName(fullpath); 54 //上传文件名 55 string fileEextension = Path.GetExtension(fileName); 56 //实际存放文件名 57 string dtnow = DateTime.Now.ToString("yyyyMMddHHmmssfff"); 58 //存放路径（相对） 59 string virpath = temprelativepath + dtnow + fileEextension; 60  61 string files = uploadFolderPath + dtnow + fileEextension; 62  File.Copy(fullpath, files); 63  64  65 //文件信息写入数据库 66 bussinessid = bussinessid == "0" ? Guid.NewGuid().ToString() : bussinessid; 67 FileInfoModel fileEntity = new FileInfoModel() 68  { 69 FileId = keyId, 70 FileName = fileName, 71 RealName= dtnow + fileEextension, 72 FilePath = releativePath, 73 FileSize = "15kb",//(!string.IsNullOrEmpty(fullpath) ? DirFileHelper.GetFileSize(fullpath.Replace("\"", "")).ToString():""), 74 FileExtensions = fileEextension, 75 FileType = fileEextension.Replace(".", ""), 76 CreatTime = DateTime.Now, 77 BussinessId = bussinessid 78  }; 79  logic.InsertFileInfo(fileEntity); 80 code = ErrorCodeManager.GetCode("0"); 81 //返回文件信息 82 FileEntity entity = new FileEntity() 83  { 84 FileName = fileName, 85 FileUrl = releativePath +fileName, 86 FileId = keyId, 87 KeyValue = bussinessid, 88 RealFilePath= releativePath+ dtnow + fileEextension 89  }; 90 JavaScriptSerializer serializer = new JavaScriptSerializer(); 91 rtValue = serializer.Serialize(entity); 92 string[] tempfiles = CommonHelper.GetFiles(temppath); 93 foreach (var item in tempfiles) 94  { 95 try 96  {  97  File.Delete(item);//删除临时文件 98  } 99 catch (Exception ex)100  {101 continue;102  }103  }104  }105  }106 catch (Exception ex)107  {108 //LogManager.Logger.Error("文件上传失败");109 code = ErrorCodeManager.GetCode("26001");110 rtValue = "文件上传失败";111  }112 return rtValue;113  }114 115 /// <summary>116 /// 上传文件117 /// </summary>118 public class WithExtensionMultipartFormDataStreamProvider : MultipartFormDataStreamProvider119  {120 public string fileName { get; set; }121 /// <summary>122 /// 重写文件名123 /// </summary>124 /// <param name="headers"></param>125 /// <returns></returns>126 public override string GetLocalFileName(System.Net.Http.Headers.HttpContentHeaders headers)127  {128 string fileName = !string.IsNullOrWhiteSpace(headers.ContentDisposition.FileName) ? GetValidFileName(headers.ContentDisposition.FileName) : "";129 //return fileName + extension;130 return fileName;131  }132 133 public WithExtensionMultipartFormDataStreamProvider(string rootPath, string filename)134 : base(rootPath)135  {136 //fileName = filename;137  }138 private string GetValidFileName(string filePath)139  {140 char[] invalids = System.IO.Path.GetInvalidFileNameChars();141 return String.Join("_", filePath.Split(invalids, StringSplitOptions.RemoveEmptyEntries)).TrimEnd(‘.‘);142  }143 }