在做通讯相关的数据操作时常常须要用到 byte[]   byte 数组替换操作.比方协义转换相关的

如今提供了几种替换的方法

    /// <summary>/// 二进制数据 操作/// </summary>public class HexUtility{/// <summary>/// 二进制替换,假设没有替换则返回原数组对像的复本./// </summary>/// <param name="sourceByteArray">源数据</param>/// <param name="oldValue">须要替换的数据</param>/// <param name="newValue">将要替换成为的数据</param>public static byte[] Replace(byte[] sourceByteArray, byte[] oldValue, byte[] newValue){//创建新数据多出1字节int newArrayLen = (int)((newValue.Length / (double)oldValue.Length) * sourceByteArray.Length) + 1;//得到数组长度newArrayLen = Math.Max(newArrayLen, sourceByteArray.Length);//新的最后结果数组byte[] newByteArray = new byte[newArrayLen];//新数组的当前索引int curIndex = 0;//開始结束int start = -1;int end = -1;//当前查找到的索引int oldCurindex = 0;//替换数据替换for (int x = 0; x < sourceByteArray.Length; x++){//查找要替换的数据if (sourceByteArray[x] == oldValue[oldCurindex]){if (oldCurindex == 0){start = x;}if (oldCurindex == oldValue.Length - 1){end = x;oldCurindex = 0;}else{oldCurindex++;}}else{oldCurindex = 0;newByteArray[curIndex] = sourceByteArray[x];curIndex++;}//数据查找完毕if (start != -1 && end != -1){//复制替换数据Buffer.BlockCopy(newValue, 0, newByteArray, curIndex, newValue.Length);//计算新数组的偏移量curIndex += newValue.Length;//又一次设置须要复制索引的索引start = end = -1;}}//处理返回结果byte[] result = null;if (curIndex != 0){result = new byte[curIndex];Buffer.BlockCopy(newByteArray, 0, result, 0, result.Length);}else{result = new byte[sourceByteArray.Length];Buffer.BlockCopy(sourceByteArray, 0, result, 0, result.Length);}return result;}/// <summary>/// 二进制替换,假设没有替换则返回原数组对像的复本./// </summary>/// <param name="sourceByteArray">源数据</param>/// <param name="replaces">须要替换的数据集合</param>public static byte[] Replace(byte[] sourceByteArray, List<HexReplaceEntity> replaces){//创建新数据多出1字节int newArrayLen = (int)((replaces.Sum(p => p.newValue.Length) / (double)replaces.Sum(p => p.oldValue.Length)) * sourceByteArray.Length) + 1;//得到数组长度newArrayLen = Math.Max(newArrayLen, sourceByteArray.Length);//新的最后结果数组byte[] newByteArray = new byte[newArrayLen];//新数组的当前索引int curIndex = 0;bool find = false;//替换数据替换for (int x = 0; x < sourceByteArray.Length; x++){foreach (HexReplaceEntity rep in replaces){//查找要替换的数据if (sourceByteArray[x] == rep.oldValue[rep.oldCurindex]){if (rep.oldCurindex == 0){rep.start = x;}if (rep.oldCurindex == rep.oldValue.Length - 1){rep.end = x;rep.oldCurindex = 0;}else{rep.oldCurindex++;}}else{rep.oldCurindex = 0;newByteArray[curIndex] = sourceByteArray[x];find = false;}//数据查找完毕if (rep.start != -1 && rep.end != -1){find = true;if (rep.newValue.Length >= rep.oldValue.Length){//复制替换数据Buffer.BlockCopy(rep.newValue, 0, newByteArray, curIndex, rep.newValue.Length);//计算新数组的偏移量curIndex += rep.newValue.Length;}else//由大字节替换为少字节时出现了问题{curIndex -= rep.end - rep.start;//复制替换数据Buffer.BlockCopy(rep.newValue, 0, newByteArray, curIndex, rep.newValue.Length);//计算新数组的偏移量curIndex += rep.newValue.Length;}//又一次设置须要复制索引的索引rep.start = rep.end = -1;break;}}if (!find){curIndex++;}}//处理返回结果byte[] result = null;if (curIndex != 0){result = new byte[curIndex];Buffer.BlockCopy(newByteArray, 0, result, 0, result.Length);}else{result = new byte[sourceByteArray.Length];Buffer.BlockCopy(sourceByteArray, 0, result, 0, result.Length);}return result;}}/// <summary>/// 替换数据实体/// </summary>public class HexReplaceEntity{/// <summary>/// 须要替换的原始值/// </summary>public byte[] oldValue { get; set; }/// <summary>/// 新值/// </summary>public byte[] newValue { get; set; }/// <summary>/// 默认開始结束标记/// </summary>internal int start = -1;/// <summary>/// 默认開始结束标记/// </summary>internal int end = -1;//当前查找到的索引internal int oldCurindex = 0;}