C# winform 上传文件到服务器

最新推荐文章于 2025-06-19 11:16:32 发布

转载最新推荐文章于 2025-06-19 11:16:32 发布 · 884 阅读

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CC 4.0 BY-SA版权

原文链接：https://my.oschina.net/u/933229/blog/898982

文章标签：

#c#

本文介绍了一种使用HttpWebRequest实现文件上传的方法，并提供了两种实现方案：一种是没有进度条的直接上传方式，另一种则是包含进度条提示的方式。这两种方法均支持断点续传功能。

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为什么80%的码农都做不了架构师？>>>

近期在做上传文件到服务器的需求，所以拿出来给大家共享。

没有进度条的

public class VrPostFile
{
/// <summary>
/// 将本地文件上传到指定的服务器(HttpWebRequest方法)
/// </summary>
/// <param name="address">文件上传到的服务器</param>
/// <param name="fileNamePath">要上传的本地文件（全路径）</param>
/// <param name="saveName">文件上传后的名称</param>
/// <param name="progressBar">上传进度条</param>
/// <returns>成功返回1，失败返回0</returns>
public static int Upload_Request2(string address, string fileNamePath, string saveName)
{
int returnValue = 0; // 要上传的文件
FileStream fs = new FileStream(fileNamePath, FileMode.Open, FileAccess.Read);
BinaryReader r = new BinaryReader(fs); //时间戳
string strBoundary = "----------" + DateTime.Now.Ticks.ToString("x");
byte[] boundaryBytes = Encoding.ASCII.GetBytes("\r\n--" + strBoundary + "\r\n"); //请求头部信息
StringBuilder sb = new StringBuilder();
sb.Append("--");
sb.Append(strBoundary);
sb.Append("\r\n");
sb.Append("Content-Disposition: form-data; name=\"");
sb.Append("uploaded_file");
sb.Append("\"; filename=\"");
sb.Append(saveName);
sb.Append("\";");
sb.Append("\r\n");
sb.Append("Content-Type: ");
sb.Append("application/octet-stream");
sb.Append("\r\n");
sb.Append("\r\n");
string strPostHeader = sb.ToString();
byte[] postHeaderBytes = Encoding.UTF8.GetBytes(strPostHeader); // 根据uri创建HttpWebRequest对象
HttpWebRequest httpReq = (HttpWebRequest)WebRequest.Create(new Uri(address));
httpReq.Method = "POST"; //对发送的数据不使用缓存
httpReq.AllowWriteStreamBuffering = false; //设置获得响应的超时时间（300秒）
httpReq.Timeout = 300000;
httpReq.ContentType = "multipart/form-data; boundary=" + strBoundary;
long length = fs.Length + postHeaderBytes.Length + boundaryBytes.Length;
long fileLength = fs.Length;
httpReq.ContentLength = length;
try
{
//每次上传4k
int bufferLength = 4096;
byte[] buffer = new byte[bufferLength]; //已上传的字节数
long offset = 0; //开始上传时间
DateTime startTime = DateTime.Now;
int size = r.Read(buffer, 0, bufferLength);
Stream postStream = httpReq.GetRequestStream(); //发送请求头部消息
postStream.Write(postHeaderBytes, 0, postHeaderBytes.Length);
while (size > 0)
{
postStream.Write(buffer, 0, size);
offset += size;
Application.DoEvents();
size = r.Read(buffer, 0, bufferLength);
}
//添加尾部的时间戳
postStream.Write(boundaryBytes, 0, boundaryBytes.Length);
postStream.Close(); //获取服务器端的响应
WebResponse webRespon = httpReq.GetResponse();
Stream s = webRespon.GetResponseStream();
//读取服务器端返回的消息
StreamReader sr = new StreamReader(s);
String sReturnString = sr.ReadLine();
s.Close();
sr.Close();
if (sReturnString == "Success")
{
returnValue = 1;
}
else if (sReturnString == "Error")
{
returnValue = 0;
}
}
catch
{
returnValue = 0;
}
finally
{
fs.Close();
r.Close();
}
return returnValue;
}

}

int rlt= VrPostFile.Upload_Request2("http://localhost/vr/ci/index.php/UploadTxt",Application.StartupPath+ "/341241412-15_1.txt", "341241412-15_1.txt");

第二种方式，有进度条提醒

http://blog.youkuaiyun.com/jingdian14/article/details/7885416#

两个方式都支持断点续传。

转载于:https://my.oschina.net/u/933229/blog/898982