c# WebApi POST请求同时包含数据及其文件
原因：创建.net WebApi的接口API。IIS作为服务端。安卓作为客户端发送json文件及其文件。
Android端使用xUtils3.0实现文件上传
java代码：
//要传递给服务器的json格式参数 JSONObject json = new JSONObject(); try { json.put("devId", id); json.put("devName", devName); json.put("keyWord", keyWord); } catch (JSONException e) { e.printStackTrace(); } //构建RequestParams对象，传入请求的服务器地址URL RequestParams params = new RequestParams(Constants.UPLOAD_FILE); params.setAsJsonContent(true); List<KeyValue> list = new ArrayList<>(); list.add(new KeyValue("file", new File(filePah))); list.add(new KeyValue("parameters", json.toString())); MultipartBody body = new MultipartBody(list, "UTF-8"); params.setRequestBody(body); x.http().post(params, new org.xutils.common.Callback.CommonCallback<String>() { @Override public void onSuccess(String result) { LogUtil.e("请求结果：" + result); } @Override public void onFinished() { //上传完成 } @Override public void onCancelled(CancelledException cex) { //取消上传 } @Override public void onError(Throwable ex, boolean isOnCallback) { //上传失败 LogUtil.e("请求失败：" + ex.toString()); } });
.net WebApi代码：
using System; using System.Collections.Generic; using System.Linq; using System.Net; using System.Net.Http; using System.Web.Http; using System.Web; using System.Web.UI; using System.Web.UI.WebControls; using System.IO; using System.Data.Entity; using Newtonsoft.Json; using System.Configuration; namespace AndroidWebAPI.Controllers { public class AddInfoController : ApiController { public IEnumerable<string> PostAddInfo() { if (!Request.Content.IsMimeMultipartContent("form-data")) { return "请求内容不是表单形式"; } if (HttpContext.Current.Request.Files.Count >0) { try { var file = HttpContext.Current.Request.Files[0]; string fname = DateTime.Now.ToString("yyyyMMddHHmmssfff") + file.FileName; string SavePath = HttpContext.Current.Server.MapPath(string.Format("~/{0}", "File")); if (Directory.Exists(SavePath)) { Directory.CreateDirectory(SavePath); } string fullPathUrl = Path.Combine(SavePath, fname); file.SaveAs(fullPathUrl); videoFileName = fname; } catch (Exception ex) { } } return PBimLogic.AddProblemListInfo(Plm, videoFileName); } } }
c# 创建控制台模拟表单上传数据与文件.
创建HttpUpload类
using System; using System.Collections; using System.Collections.Generic; using System.IO; using System.Net; using System.Text; namespace HttpTest { public class HttpUpload { private ArrayList bytesArray; private Encoding encoding = Encoding.UTF8; private string boundary = String.Empty; public HttpUpload() { bytesArray = new ArrayList(); string flag = DateTime.Now.Ticks.ToString("x"); boundary = "---------------------------" + flag; } /// <summary> /// 合并请求数据 /// </summary> /// <returns></returns> private byte[] MergeContent() { int length = 0; int readLength = 0; string endBoundary = "--" + boundary + "--\r\n"; byte[] endBoundaryBytes = encoding.GetBytes(endBoundary); bytesArray.Add(endBoundaryBytes); foreach (byte[] b in bytesArray) { length += b.Length; } byte[] bytes = new byte[length]; foreach (byte[] b in bytesArray) { b.CopyTo(bytes, readLength); readLength += b.Length; } return bytes; } /// <summary> /// 上传 /// </summary> /// <param name="requestUrl">请求url</param> /// <param name="responseText">响应</param> /// <returns></returns> public bool Upload(String requestUrl, out String responseText) { WebClient webClient = new WebClient(); webClient.Headers.Add("Content-Type", "multipart/form-data; boundary=" + boundary); byte[] responseBytes; byte[] bytes = MergeContent(); try { responseBytes = webClient.UploadData(requestUrl, bytes); responseText = System.Text.Encoding.UTF8.GetString(responseBytes); return true; } catch (WebException ex) { Stream responseStream = ex.Response.GetResponseStream(); responseBytes = new byte[ex.Response.ContentLength]; responseStream.Read(responseBytes, 0, responseBytes.Length); } responseText = System.Text.Encoding.UTF8.GetString(responseBytes); return false; } /// <summary> /// 设置表单数据字段 /// </summary> /// <param name="fieldName">字段名</param> /// <param name="fieldValue">字段值</param> /// <returns></returns> public void SetFieldValue(String fieldName, String fieldValue) { string httpRow = "--" + boundary + "\r\nContent-Disposition: form-data; name=\"{0}\"\r\n\r\n{1}\r\n"; string httpRowData = String.Format(httpRow, fieldName, fieldValue); bytesArray.Add(encoding.GetBytes(httpRowData)); } /// <summary> /// 设置表单文件数据 /// </summary> /// <param name="fieldName">字段名</param> /// <param name="filename">字段值</param> /// <param name="contentType">内容内型</param> /// <param name="fileBytes">文件字节流</param> /// <returns></returns> public void SetFieldValue(String fieldName, String filename, String contentType, Byte[] fileBytes) { string end = "\r\n"; string httpRow = "--" + boundary + "\r\nContent-Disposition: form-data; name=\"{0}\"; filename=\"{1}\"\r\nContent-Type: {2}\r\n\r\n"; string httpRowData = String.Format(httpRow, fieldName, filename, contentType); byte[] headerBytes = encoding.GetBytes(httpRowData); byte[] endBytes = encoding.GetBytes(end); byte[] fileDataBytes = new byte[headerBytes.Length + fileBytes.Length + endBytes.Length]; headerBytes.CopyTo(fileDataBytes, 0); fileBytes.CopyTo(fileDataBytes, headerBytes.Length); endBytes.CopyTo(fileDataBytes, headerBytes.Length + fileBytes.Length); bytesArray.Add(fileDataBytes); } } }
控制台调用：
using System; using System.IO; using System.Text; namespace HttpTest { class Program { static void Main(string[] args) { Console.WriteLine("Hello World!"); try { var httpUpload = new HttpUpload(); string txtJsonData= File.ReadAllText(@"D:\Test\HttpTest\HttpTest\HttpTest\JsonData.txt", Encoding.UTF8); httpUpload.SetFieldValue("parameters", txtJsonData); string path = @"D:\Test\HttpTest\HttpTest\HttpTest\Test.txt"; FileStream fspdf = new FileStream(path, FileMode.Open); byte[] fileBytepdf = new byte[fspdf.Length]; fspdf.Read(fileBytepdf, 0, fileBytepdf.Length); fspdf.Close(); var pdfName = path.Substring(path.LastIndexOf("\\") + 1); httpUpload.SetFieldValue(pdfName, pdfName, "application/octet-stream", fileBytepdf); string responStr = ""; //string _apiUrl = @"http://localhost:51013/api/AddInfo"; string _apiUrl = @"http://192.168.2.1:10000//api/AddInfo"; bool suc = httpUpload.Upload(_apiUrl, out responStr); } catch (Exception ex) { throw ex; } Console.ReadLine(); } } }
