C# webApi上传图片 代码篇
十年河东，十年河西，莫欺少年穷
学无止境，精益求精
代码篇，不多说
如下：
using System; using System.Collections.Generic; using System.Drawing; using System.IO; using System.Linq; using System.Net; using System.Net.Http; using System.Threading.Tasks; using System.Web.Http; namespace FileUp.Controllers { public class FileController : ApiController { [HttpPost] public async Task<string> UploadFileStream() { string returns = string.Empty; string fileType = "ss";//要创建的子文件夹的名字 var uploadPath = "~/upload"; string filePath = System.Web.HttpContext.Current.Server.MapPath(uploadPath + "/" + fileType + "/");//绝对路径 //string filePath = uploadPath + "\\" + fileType + "\\"; //E:\Fileup 居家 if (Directory.Exists(filePath) == false) { Directory.CreateDirectory(filePath); } try { var provider = new ReNameMultipartFormDataStreamProvider(filePath); await Request.Content.ReadAsMultipartAsync(provider).ContinueWith(o => { foreach (var file in provider.FileData) { string orfilename = file.Headers.ContentDisposition.FileName.TrimStart('"').TrimEnd('"');//待上传的文件名 FileInfo fileinfo = new FileInfo(file.LocalFileName); //判断开始 int maxSize = 10000000; string oldName = orfilename;//选择的文件的名称 if (fileinfo.Length <= 0) { //文件大小判断 未选择上传的图片 大小为零 } else if (fileinfo.Length > maxSize) { //文件大小判断 上传文件是否超限制 } else { // string fileExt = orfilename.Substring(orfilename.LastIndexOf('.')); string Extension = fileExt; string CreateTime = DateTime.Now.ToString("yyyyMMddHHmmss"); //定义允许上传的文件扩展名 String fileTypes = "gif,jpg,jpeg,png,bmp"; if (String.IsNullOrEmpty(fileExt) || Array.IndexOf(fileTypes.Split(','), fileExt.Substring(1).ToLower()) == -1) { returns = "上传的文件格式不是图片"; } else { returns = string.Format(@"/Uploads/{0}/{1}", fileType, System.IO.Path.GetFileName(file.LocalFileName)); } } } }); } catch (Exception ex) { returns = ex.ToString(); } return returns; } /// <summary> /// 重命名上传的文件 /// </summary> public class ReNameMultipartFormDataStreamProvider : MultipartFormDataStreamProvider { public ReNameMultipartFormDataStreamProvider(string root) : base(root) { } public override string GetLocalFileName(System.Net.Http.Headers.HttpContentHeaders headers) { string extension = !string.IsNullOrWhiteSpace(headers.ContentDisposition.FileName) ? Path.GetExtension(GetValidFileName(headers.ContentDisposition.FileName)) : ""; return Guid.NewGuid().ToString().Replace("-", "") + extension; } private string GetValidFileName(string filePath) { char[] invalids = System.IO.Path.GetInvalidFileNameChars(); return String.Join("_", filePath.Split(invalids, StringSplitOptions.RemoveEmptyEntries)).TrimEnd('.'); } } } }
PostMan请求如下：
2021-01-07 代码优化如下：
using Iot.Common; using System; using System.Collections.Generic; using System.IO; using System.Linq; using System.Net; using System.Net.Http; using System.Threading.Tasks; using System.Web; using System.Web.Http; using System.Web.Http.Cors; namespace Iot.WebSite.Controllers.Apis { [RoutePrefix("api/file")] [EnableCors(origins: "*", headers: "*", methods: "GET,POST,PUT,DELETE")] public class FileController : ApiController { /// <summary> /// 上传文件 /// </summary> /// <returns></returns> [HttpPost] public async Task<BaseResponse> UploadFileStream() { var returns = CommonBaseResponse.SetResponse<fileInfoModel>(null, false); string fileType = "OTA";//要创建的子文件夹的名字 var uploadPath = "~/Content"; string filePath = System.Web.HttpContext.Current.Server.MapPath(uploadPath + "/" + fileType + "/");//绝对路径 //string filePath = uploadPath + "\\" + fileType + "\\"; //E:\Fileup 居家 if (Directory.Exists(filePath) == false) { Directory.CreateDirectory(filePath); } try { var provider = new ReNameMultipartFormDataStreamProvider(filePath); await Request.Content.ReadAsMultipartAsync(provider).ContinueWith(o => { foreach (var file in provider.FileData) { string orfilename = file.Headers.ContentDisposition.FileName.TrimStart('"').TrimEnd('"');//待上传的文件名 FileInfo fileinfo = new FileInfo(file.LocalFileName); //判断开始 int maxSize = 1024*1024*100; //小于100M的文件 string oldName = orfilename;//选择的文件的名称 if (fileinfo.Length <= 0) { returns = CommonBaseResponse.SetResponse<fileInfoModel>(null, false, "未选择上传的附件"); //文件大小判断 未选择上传的图片 大小为零 } else if (fileinfo.Length > maxSize) { returns = CommonBaseResponse.SetResponse<fileInfoModel>(null, false, "上传文件大小超限制"); //文件大小判断 上传文件是否超限制 } else { // string fileExt = orfilename.Substring(orfilename.LastIndexOf('.')); string Extension = fileExt; string CreateTime = DateTime.Now.ToString("yyyyMMddHHmmss"); //定义允许上传的文件扩展名 String fileTypes = "bin"; if (String.IsNullOrEmpty(fileExt) || Array.IndexOf(fileTypes.Split(','), fileExt.Substring(1).ToLower()) == -1) { returns = CommonBaseResponse.SetResponse<fileInfoModel>(null, false, "上传的文件格式不正确"); } else { fileInfoModel fileResult = new fileInfoModel() { oldfilename = oldName, LocalFilePath = file.LocalFileName, filesize = fileinfo.Length, filename= fileinfo.Name, filepath= uploadPath + "/" + fileType + "/" + fileinfo.Name }; var fs = fileinfo.OpenRead(); byte[] buffur = new byte[fs.Length]; fs.Read(buffur, 0, (int)fs.Length); fileResult.filedata = buffur.ToList(); returns = CommonBaseResponse.SetResponse<fileInfoModel>(fileResult, true); } } } }); } catch (Exception ex) { LogHelper.WriteLog("上传附件出错：" + ex.ToString()); } return returns; } } /// <summary> /// 重命名上传的文件 /// </summary> public class ReNameMultipartFormDataStreamProvider : MultipartFormDataStreamProvider { public ReNameMultipartFormDataStreamProvider(string root) : base(root) { } public override string GetLocalFileName(System.Net.Http.Headers.HttpContentHeaders headers) { string extension = !string.IsNullOrWhiteSpace(headers.ContentDisposition.FileName) ? Path.GetExtension(GetValidFileName(headers.ContentDisposition.FileName)) : ""; return Guid.NewGuid().ToString().Replace("-", "") + extension; } private string GetValidFileName(string filePath) { char[] invalids = System.IO.Path.GetInvalidFileNameChars(); return String.Join("_", filePath.Split(invalids, StringSplitOptions.RemoveEmptyEntries)).TrimEnd('.'); } } public class fileInfoModel { /// <summary> /// 新文件名称 /// </summary> public string filename { get; set; } /// <summary> /// 老文件名称 /// </summary> public string oldfilename { get; set; } /// <summary> /// 服务器绝对地址 /// </summary> public string LocalFilePath { get; set; } /// <summary> /// 文件大小 字节 /// </summary> public long filesize { get; set; } /// <summary> /// 问价数据 /// </summary> public List<byte> filedata { get; set; } /// <summary> /// 文件相对路径 /// </summary> public string filepath { get; set; } } }
返回值：
antd+vue 上传代码
<a-row align="middle" class="arowLat"> <a-col :span="12"> <a-checkable-tag v-model="checked" @change="handleChange"> OTA固件包 </a-checkable-tag> <a-upload action="http://xxxxxxxx.com/api/File/UploadFileStream" > <a-button> <a-icon type="upload" /> 选择升级固件 </a-button> </a-upload> </a-col> <a-col :span="12"> </a-col> </a-row>
@陈卧龙的博客
