.net后台webclient用post方式发送文件和数据
using System; using System.Collections; using System.Collections.Generic; using System.Linq; using System.IO; using System.Text; using System.Net; namespace BcpMobile.Handlers { /// <summary> /// description：http post请求客户端 /// last-modified-date：2012-02-28 /// </summary> public class HttpRequestClient { #region //字段 private ArrayList bytesArray; private Encoding encoding = Encoding.UTF8; private string boundary = String.Empty; #endregion #region //构造方法 public HttpRequestClient() { bytesArray = new ArrayList(); string flag = DateTime.Now.Ticks.ToString("x"); boundary = "---------------------------" + flag; } #endregion #region //方法 /// <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); } #endregion } }
private void sendFileData(string sUrl, string pdfPathName, int member_id, string access_token, out string responseText) { string url = sUrl;//发送到的页面的地址 string image_path = pdfPathName;//文件的位置 FileStream fs = new FileStream(image_path, System.IO.FileMode.Open, System.IO.FileAccess.Read); byte[] fileBytes = new byte[fs.Length]; fs.Read(fileBytes, 0, fileBytes.Length); fs.Close(); fs.Dispose(); HttpRequestClient httpRequestClient = new HttpRequestClient(); httpRequestClient.SetFieldValue("member_id", member_id.ToString());//发送数据 httpRequestClient.SetFieldValue("access_token", access_token);//发送数据 int pos = image_path.LastIndexOf("\\"); string fileName = image_path.Substring(pos + 1); httpRequestClient.SetFieldValue("key", fileName, "application/octet-stream", fileBytes); bool uploaded = httpRequestClient.Upload(url, out responseText); --------------------- 作者：zhgl7688 来源：CSDN 原文：https://blog.csdn.net/zhgl7688/article/details/51593434 版权声明：本文为博主原创文章，转载请附上博文链接！
/// <summary> /// post发送数据 /// </summary> /// <param name="url">接收地址</param> /// <param name="postString">拼接Post字符串"arg1=a&arg2=b"</param> /// <returns></returns> public static string HttpUploadData(string url, string postString) { byte[] postData = Encoding.UTF8.GetBytes(postString);//编码，尤其是汉字，事先要看下抓取网页的编码方式 WebClient webClient = new WebClient(); webClient.Headers.Add("Content-Type", "application/x-www-form-urlencoded");//采取POST方式必须加的header，如果改为GET方式的话就去掉这句话即可 byte[] responseData = webClient.UploadData(url, "POST", postData);//得到返回字符流 return Encoding.UTF8.GetString(responseData);//解码 }
