c#模拟POST上传⽂件到服务器using System;
using System.Collections;
using System.Collections.Generic;
using System.Linq;
using System.IO;
using System.Text;
using System.Net;
namespace HuaTong.General.Utility
{
///<summary>
///⽤于模拟POST上传⽂件到服务器
/
//</summary>
public class HttpUpload
{
private ArrayList bytesArray;
private Encoding encoding = Encoding.UTF8;
param nameprivate 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);
}
}
}

版权声明：本站内容均来自互联网，仅供演示用，请勿用于商业和其他非法用途。如果侵犯了您的权益请与我们联系QQ:729038198，我们将在24小时内删除。