/// <summary> /// 截取字节数组 /// </summary> /// <param name="srcBytes">要截取的字节数组</param> /// <param name="startIndex">开始截取位置的索引</param> /// <param name="length">要截取的字节长度</param> /// <returns>截取后的字节数组</returns> public byte[] SubByte(byte[] srcBytes, int startIndex, int length) { System.IO.MemoryStream bufferStream = new System.IO.MemoryStream(); byte[] returnByte = new byte[] { }; if (srcBytes == null) { return returnByte; } if (startIndex < 0) { startIndex = 0; } if (startIndex < srcBytes.Length) { if (length < 1 || length > srcBytes.Length - startIndex) { length = srcBytes.Length - startIndex; } bufferStream.Write(srcBytes, startIndex, length); returnByte = bufferStream.ToArray(); bufferStream.SetLength(0); bufferStream.Position = 0; } bufferStream.Close(); bufferStream.Dispose(); return returnByte; } }
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