Question

我正在尝试循环读取值的字节数组（下面的示例），然后将这些值插入数据库

我循环跟踪位置

    byte[] data;
    long position=0;
    while (position < data.Length)
    {
        position = Conversion.Extract(data, out mydata, position);
        position = Conversion.Extract(data, out nextitem, position);
    }

    public static long Extract(byte[] message, out int variable, long position)
    {
        const int length = 4; // the length of an int

        if (message.Length >= position + length)
        {
            variable = BitConverter.ToInt32(message, (int)position);
            return position + length;
        }

        // there was a problem
        variable = 0;
        return -1;
    }

我的数据包含一些空值，我如何提取这些值并成功移动到下一个值。目前，如果我遇到一个空值我不知道如何检测到这一点，并转到下一个项目。任何人都可以提供帮助

6F 72 67 61 6E 69 73 61 74 69 6F 6E 49 64 3D 33
26 10 00 00 00 50 65 6F 70 6C 65 50 65 6F 70 6C
65 4C 69 6E 6B 6A 08 00 00 09 00 00 00 0E 00 00
00 53 65 6E 69 6F 72 50 65 72 73 6F 6E 49 64 0E
00 00 00 4A 75 6E 69 6F 72 50 65 72 73 6F 6E 49
64 11 00 00 00 53 65 6E 69 6F 72 50 65 72 73 6F
6E 4D 69 73 49 64 11 00 00 00 4A 75 6E 69 6F 72
50 65 72 73 6F 6E 4D 69 73 49 64 08 00 00 00 4C
69 6E 6B 54 79 70 65 16 00 00 00 50 61 72 65 6E
74 61 6C 52 65 73 70 6F 6E 73 69 62 69 6C 69 74
79 08 00 00 00 50 72 69 6F 72 69 74 79 0B 00 00
00 4C 61 73 74 55 70 64 61 74 65 64 07 00 00 00
44 65 6C 65 74 65 64 01 00 00 00 D7 0A 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 01 80 C3 29
C6 85 BF CE 08 00 02 00 00 00 3C 0C 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 F0 83 76 C6
85 BF CE 08 00 03 00 00 00 3C 0C 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 C0 0E 76 C6 85
BF CE 08 00 04 00 00 00 67 0B 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 01 70 CA 4B C6 85 BF
CE 08 00 05 00 00 00 67 0B 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 02 70 CA 4B C6 85 BF CE
08 00 06 00 00 00 9B 08 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 02 C0 BE B2 C5 85 BF CE 08
00 06 00 00 00 AD 09 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 02 10 6D F5 C5 85 BF CE 08 00
06 00 00 00 3F 0A 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 02 80 59 11 C6 85 BF CE 08 00 07
00 00 00 E3 0A 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 01 C0 D0 2C C6 85 BF CE 08 00 08 00
00 00 9B 08 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 01 C0 BE B2 C5 85 BF CE 08 00 08 00 00
00 AD 09 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 01 10 6D F5 C5 85 BF CE 08 00 08 00 00 00
C9 09 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 01 20 76 FA C5 85 BF CE 08 00 08 00 00 00 3F
0A 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
01 B0 CE 11 C6 85 BF CE 08 00 09 00 00 00 E3 0A
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 01
90 5B 2C C6 85 BF CE 08 00 0A 00 00 00 C9 09 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 02 20
76 FA C5 85 BF CE 08 00 0B 00 00 00 F6 08 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 01 E0 C9
D2 C5 85 BF CE 08 00 0C 00 00 00 F6 08 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 02 F0 2C C9
C5 85 BF CE 08 00 0E 00 00 00 91 09 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 01 C0 C7 EF C5
85 BF CE 08 00 0F 00 00 00 91 09 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 02 90 52 EF C5 85

SeniorPersonId | JuniorPersonId | SeniorPersonMisId | JuniorPersonMisId | LinkType | ParentalResponsibility | Priority | LastUpdated              Deleted
1              | 2775           | {null}            | {null}            | {null}   | 0                      | 1        | 2012-02-22 14:31:18.200 | {null}
2              | 3132           | {null}            | {null}            | {null}   | 0                      | {null}   | 2012-02-22 14:31:18.703 | {null}
3              | 3132           | {null}            | {null}            | {null}   | 0                      | {null}   | 2012-02-22 14:31:18.700 | {null}
4              | 2919           | {null}            | {null}            | {null}   | 0                      | 1        | 2012-02-22 14:31:18.423 | {null}

Answer 1

如果使用null值表示空字节，那么这应该起作用：

bool HasNullByteInside(Int32 n)
{
    return (n & 0xff000000 == 0) ||
           (n & 0x00ff0000 == 0) ||
           (n & 0x0000ff00 == 0) ||
           (n & 0x000000ff == 0);
}

读取字节数组中的空值

1 个答案: