我正在尝试从ResponeStream读取字节,但我怎么说等待数据?
如果我在GetResponseStream之后设置一个断点并等待几秒钟,那么一切正常。 使用StreamReader.ReadToEnd()也可以正常工作,但我想自己读取字节。
byte[] response = null;
int left = 0;
int steps = 0;
int pos = 0;
int bytelength = 1024;
OnReceiveStart();
using (HttpWebResponse webResponse = (HttpWebResponse)webRequest.GetResponse()) {
using (Stream sr = webResponse.GetResponseStream()) {
response = new byte[(int)webResponse.ContentLength];
left = (int)webResponse.ContentLength % bytelength;
steps = (int)webResponse.ContentLength / bytelength;
pos = 0;
for (int i = 0; i < steps; i++) {
sr.Read(response, pos, bytelength);
pos += bytelength;
OnReceiveProgress((int)webResponse.ContentLength, pos);
}
if (left != 0) {
sr.Read(response, pos, left);
}
sr.Close();
}
webResponse.Close();
}
OnReceiveProgress(1, 1);
OnReceiveFinished();
答案 0 :(得分:6)
请不要将其分解为相同数量的步骤 - 相反,只需继续阅读,直到完成为止:
while (pos < response.Length)
{
int bytesRead = sr.Read(response, pos, response.Length - pos);
if (bytesRead == 0)
{
// End of data and we didn't finish reading. Oops.
throw new IOException("Premature end of data");
}
pos += bytesRead;
OnReceiveProgress(response.Length, pos);
}
请注意,您必须使用Stream.Read
的返回值 - 您不能假设它会读取您要求的所有内容。