{"id":6602,"date":"2022-08-23T09:04:48","date_gmt":"2022-08-23T08:04:48","guid":{"rendered":"https:\/\/solidt.eu\/site\/?p=6602"},"modified":"2022-08-23T09:22:52","modified_gmt":"2022-08-23T08:22:52","slug":"c-basic-validate-container-number","status":"publish","type":"post","link":"https:\/\/solidt.eu\/site\/c-basic-validate-container-number\/","title":{"rendered":"C# Basic validate container number"},"content":{"rendered":"\n
\/\/ ISO 6346\r\n\r\n\/\/ does NOT validate the \"Check Digit\"\r\n\r\nprivate static Regex containerNumberRegex = new Regex(\"^[a-zA-Z]{3}[uUjJzZ]{1}[0-9]{7}$\");\r\npublic static bool IsValidContainerNumber(string text) => containerNumberRegex.IsMatch(text);\r\n\r\n\r\nIsValidContainerNumber(\" MEDU8707688  \".Trim())\r\n\r\n\r\n\r\n\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\r\n\/\/ Code to get Check digit\r\n\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\r\n\r\nprivate static string CharacterValues = \"0123456789A_BCDEFGHIJK_LMNOPQRSTU_VWXYZ\"; \/\/ skip 11th values\r\n\r\n\/\/ short Linq version\r\nprivate static int GetCheckDigit(string containerNumber) \r\n{\r\n    var sum = containerNumber.Select((c, i) => CharacterValues.IndexOf(c) * Math.Pow(2, i)).Sum();\r\n    return (int)(sum - (Math.Floor(sum \/ 11.0) * 11.0));\r\n}\r\n\r\n\/\/ comprehensive version\r\nprivate static int GetCheckDigit(string containerNumber) \r\n{\r\n    var sum = 0.0;\r\n    for (int i = 0; i < containerNumber.Count(); i++)\r\n    {\r\n        char c = containerNumber[i];\r\n        var power = Math.Pow(2, i);\r\n\t\tvar charValue = CharacterValues.IndexOf(c);\r\n\t\tConsole.WriteLine($\"{i}: [{c}] {power,4} * {charValue,4} = {power*charValue,4}\");\r\n        sum += CharacterValues.IndexOf(c) * power;\r\n    }\r\n    var rest =  Math.Floor(sum \/ 11.0) * 11.0;\r\n\tConsole.WriteLine($\"sum-rest: {sum} - {rest} = {sum - rest}\");\r\n    return (int)Math.Floor(sum - rest);\r\n}\r\n\r\nvoid Main()\r\n{\r\n\tConsole.WriteLine(GetCheckDigit(\"CSQU305438\"));\r\n}\r\n\r\n\r\n\/* OUTPUT:\r\n0: [C]    1 *   13 =   13\r\n1: [S]    2 *   30 =   60\r\n2: [Q]    4 *   28 =  112\r\n3: [U]    8 *   32 =  256\r\n4: [3]   16 *    3 =   48\r\n5: [0]   32 *    0 =    0\r\n6: [5]   64 *    5 =  320\r\n7: [4]  128 *    4 =  512\r\n8: [3]  256 *    3 =  768\r\n9: [8]  512 *    8 = 4096\r\nsum-rest: 6185 - 6182 = 3\r\n3\r\n*\/\r\n<\/pre><\/div>\n\n\n\n
What is ISO 6346 (wikipedia definition)<\/h3>\n\n\n\n
ISO 6346 is an international standard covering the coding, identification and marking of intermodal (shipping) containers used within containerized intermodal freight transport.The standard establishes a visual identification system for every container that includes a unique serial number (with check digit), the owner, a country code, a size, type and equipment category as well as any operational marks. The standard is managed by the International Container Bureau (BIC).<\/p>\n\n\n\n
\"preview<\/a><\/figure>\n\n\n\n
Step<\/th>Container number<\/th>Total<\/th><\/tr><\/thead>
<\/td>C S Q U 3 0 5 4 3 8<\/td><\/td><\/tr>
1<\/td>13 30 28 32 3 0 5 4 3 8<\/td><\/td><\/tr>
<\/td>x x x x x x x x x x<\/td><\/td><\/tr>
2<\/td>1 2 4 8 16 32 64 128 256 512<\/td><\/td><\/tr>
<\/td>= = = = = = = = = =<\/td><\/td><\/tr>
<\/td>13 60 112 256 48 0 320 512 768 4096<\/td><\/td><\/tr>
3<\/td>Sum all results from (2)<\/td>6185<\/td><\/tr>
4<\/td>Divide (3) by 11 (remainder discarded)<\/td>562<\/td><\/tr>
5<\/td>Multiply (4) by 11<\/td>6182<\/td><\/tr>
6<\/td>(3) minus (5) = Check Digit:<\/td>3<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n
<\/a>Step 1<\/h3>\n\n\n\n
An equivalent numerical value is assigned to each letter of the alphabet, beginning with 10 for the letter A (11 and multiples thereof are omitted):<\/em><\/p>\n\n\n\n
0<\/th>1<\/th>2<\/th>3<\/th>4<\/th>5<\/th>6<\/th>7<\/th>8<\/th>9<\/th><\/tr><\/thead>
0<\/td>1<\/td>2<\/td>3<\/td>4<\/td>5<\/td>6<\/td>7<\/td>8<\/td>9<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n
A<\/th>B<\/th>C<\/th>D<\/th>E<\/th>F<\/th>G<\/th>H<\/th>I<\/th>J<\/th>K<\/th>L<\/th>M<\/th><\/tr><\/thead>
10<\/td>12<\/td>13<\/td>14<\/td>15<\/td>16<\/td>17<\/td>18<\/td>19<\/td>20<\/td>21<\/td>23<\/td>24<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n
N<\/th>O<\/th>P<\/th>Q<\/th>R<\/th>S<\/th>T<\/th>U<\/th>V<\/th>W<\/th>X<\/th>Y<\/th>Z<\/th><\/tr><\/thead>
25<\/td>26<\/td>27<\/td>28<\/td>29<\/td>30<\/td>31<\/td>32<\/td>34<\/td>35<\/td>36<\/td>37<\/td>38<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n
<\/a>Step 2<\/h3>\n\n\n\n
Each of the numbers calculated in step 1 is multiplied by 2position, where position is the exponent to base 2. Position starts at 0, from left to right.<\/em><\/p>\n\n\n\n
<\/a>Step 3<\/h3>\n\n\n\n
Sum up all results of Step above<\/em><\/p>\n\n\n\n
<\/a>Step 4<\/h3>\n\n\n\n
Round the result down towards zero i.e. make the result a whole number (integer)<\/em><\/p>\n\n\n\n
<\/a>Step 5<\/h3>\n\n\n\n
Divide them by 11<\/em><\/p>\n\n\n\n
<\/a>Step 6<\/h3>\n\n\n\n
Multiply the integer value by 11<\/em><\/p>\n\n\n\n
<\/a>Step 7<\/h3>\n\n\n\n
Subtract result of Step 3 from result of (6): This is the check digit.<\/em><\/p>\n\n\n\n
\n
What is a Container Number? Explanations with Examples<\/a><\/blockquote>