读取字节数组中的空值
[英]Reading Null Values in Byte Array
问题描述
I am trying to loop through a byte array (sample below) reading the values to then insert those into a database 
我试图遍历字节数组（下面的示例）读取值，然后将其插入数据库
I loop through keeping track of the position 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;
}
The data i have contains some null values, how can i extract these and successfully move onto the next value. 我拥有的数据包含一些空值，如何提取这些空值并成功移至下一个值。 At present if i come across a null value i dont know how to detect this and move onto the next item. 目前，如果我遇到一个空值，我不知道如何检测到此值并移至下一个项目。 Can anyone help at all 任何人都可以帮忙
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}
1 个解决方案
解决方案1
0 2012-02-24 13:21:49
If with null value you mean a null byte then this should work: 如果使用null值表示空字节，则应该可以使用：
bool HasNullByteInside(Int32 n)
{
return (n & 0xff000000 == 0) ||
(n & 0x00ff0000 == 0) ||
(n & 0x0000ff00 == 0) ||
(n & 0x000000ff == 0);
}
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