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可以实现文件上传到服务器的功能
public int UpSound_Request(string address, string fileNamePath, string saveName, ProgressBar progressBar)
{
int returnValue = 0;
//要上传的文件
FileStream fs = new FileStream(fileNamePath, FileMode.Open, FileAccess.Read);
//二进制对象
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");
//请求的头部信息
StringBuilder sb = new StringBuilder();
sb.Append("--");
sb.Append(strBoundary);
sb.Append("\r\n");
sb.Append("Content-Disposition: form-data; name=\"");
sb.Append("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
{
progressBar.Maximum = int.MaxValue;
progressBar.Minimum = 0;
progressBar.Value = 0;
//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;
progressBar.Value = (int)(offset * (int.MaxValue / length));
TimeSpan span = DateTime.Now - startTime;
double second = span.TotalSeconds;
labTime.Text = "已用时:" second.ToString("F2") "秒";
if (second > 0.001)
{
labSpeed.Text = "平均速度:" (offset / 1024 / second).ToString("0.00") "KB/秒";
}
else
{
labSpeed.Text = " 正在连接…";
}
labState.Text = "已上传:" (offset * 100.0 / length).ToString("F2") "%";
labSize.Text = (offset / 1048576.0).ToString("F2") "M/" (fileLength / 1048576.0).ToString("F2") "M";
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;
}