标签：style blog color ar for 文件 数据 art div
private void button2_Click(object sender, EventArgs e)
{
var list = new List<Frame>();
byte[] buf;
byte[] bytStart = {0x70, 0x6D, 0x6A, 0x73, 0x7A, 0x6A, 0x66, 0x72, 0x6D};
byte[] bytEnd = { 0x70, 0x66, 0x72, 0x61, 0x6D, 0x65, 0x65, 0x6E, 0x64 };
using (var fs = new FileStream(@"D:\avi\6.lxf",FileMode.Open))
{
buf = new byte[fs.Length];
var len = (int)fs.Length;
fs.Read(buf, 0, len);
}
var fStart = 0;
var fEnd = 0;
var offset = 0;
do
{
fStart = IndexOf(buf, bytStart, offset);
fEnd = IndexOf(buf, bytEnd, fStart);
Debug.Print("{0} ~ {1}",fStart,fEnd);
if (fStart == -1||fEnd==-1)
{
offset = buf.Length;
}
else
{
var frame = new Frame
{
Start = fStart + bytStart.Length,
End = fEnd,
};
frame.Length = frame.End - frame.Start;
frame.Data = new byte[frame.Length];
//内容截取
Array.Copy(buf, frame.Start, frame.Data, 0, frame.Length);
list.Add(frame);
offset = fEnd;
offset += bytEnd.Length;
}
}
while (offset < buf.Length);
}
查找字符串的方法
/// <summary> /// 报告指定的 System.Byte[] 在此实例中的第一个匹配项的索引。 /// </summary> /// <param name="srcBytes">被执行查找的 System.Byte[]。</param> /// <param name="searchBytes">要查找的 System.Byte[]。</param> /// <returns>如果找到该字节数组，则为 searchBytes 的索引位置；如果未找到该字节数组，则为 -1。如果 searchBytes 为 null 或者长度为0，则返回值为 -1。</returns> internal int IndexOf(byte[] srcBytes, byte[] searchBytes,int offset = 0) { if (offset == -1) { return -1; } if (srcBytes == null) { return -1; } if (searchBytes == null) { return -1; } if (srcBytes.Length == 0) { return -1; } if (searchBytes.Length == 0) { return -1; } if (srcBytes.Length < searchBytes.Length) { return -1; } for (var i = offset; i < srcBytes.Length - searchBytes.Length; i++) { if (srcBytes[i] != searchBytes[0]) continue; if (searchBytes.Length == 1) { return i; } var flag = true; for (var j = 1; j < searchBytes.Length; j++) { if (srcBytes[i + j] != searchBytes[j]) { flag = false; break; } } if (flag) { return i; } } return -1; }
实本类
public class Frame { public int Start { get; set; } public int End { get; set; } public int Length { get; set; } public byte[] Data { get; set; } }
标签：style blog color ar for 文件 数据 art div
原文地址：http://www.cnblogs.com/blackice/p/3949340.html
