Stream C# 截取的问题

[dsw123129]

Stream stream = httpClient.DownloadData("http://sbcx.saic.gov.cn/trade/pictureservlet3?" + imageUrl[1].Replace("&", "&"));

int streamLength = (int)stream.Length;
byte[] bte = new byte[streamLength];
stream.Read(bte, 6, streamLength-13);
//设置当前流的位置为流的开始
stream.Seek(0, SeekOrigin.Begin);
stream.Close();

//////////////////////////////////////////////////
我想把stream前6个字节去掉后7个字节去掉
然后读出来！想直接从stream里面截取！

[andyalex]

根据你需要的，稍微改一下，

 string str = "abcdef123456789abc1234567";
  byte[] bs2 = System.Text.Encoding.UTF8.GetBytes(str);
  MemoryStream ms = new MemoryStream(bs2);
  byte[] bte = new byte[ms.Length - 13];
 ms.Seek(6, SeekOrigin.Begin);// 从第7个开始读取
 ms.Read(bte, 0,(int)(ms.Length-13));
  string str1 = System.Text.Encoding.ASCII.GetString(bte, 0, bte.Length);
  Console.WriteLine(str1);

[andyalex]

当然，ms.Read(bte, 0,(int)(ms.Length-13));
这里读的时候要注意，小的话这样是可以的，但是如果大文件话，最好每次读一小段，在循环里做判断就可以了

[dsw123129]

Stream stream = httpClient.DownloadData("http://sbcx.saic.gov.cn/trade/pictureservlet3?" + imageUrl[1].Replace("&", "&"));

int streamLength = (int)stream.Length;
byte[] bte = new byte[streamLength];
steam.Position = 6;
stream.Read(bte, 0, streamLength-13);
//设置当前流的位置为流的开始
//stream.Seek(0, SeekOrigin.Begin);
stream.Close();

你这样试试，我觉得应该可以！

[Jave.Lin]

mark

[sensenstudy]

Stream stream = httpClient.DownloadData("http://sbcx.saic.gov.cn/trade/pictureservlet3?" + imageUrl[1].Replace("&", "&"));

int streamLength = (int)stream.Length;
byte[] bte = new byte[streamLength];
steam.Position = 6;
stream.Read(bte, 0, streamLength-13);
//设置当前流的位置为流的开始
//stream.Seek(0, SeekOrigin.Begin);
stream.Close();
-------------------------------------------------------
完美！

[andyalex]

无耻