Advanced C# Examples and Usage

This article will give you some common use cases for advanced C# logic to use in the map.

1. Introduction

a. C# code in a map is where you can assign data to a field with some specific conditions or get/set special value.

b. A code in Map must have the “return exp;” statement. “exp” could be a variable, constant value, a function … Example:

return "ST";

c. "value" refers to the data being passed in from the source side. Example:

if(string.IsNullOrEmpty(value))
    return value;

d. Example about the relation of field in structure

2. Basic code

a. Code supported by Simplify

b. Some code in C# that common use in Map code 

3. Common example

a. Getting the qualifiers in the for loop at the detail level
This is Map code from:
Map: ANSI X12 830 004010 to Horton Planning Schedule FFS Target
Link: /Document/FGrp/Msg/LoopLIN/LoopFST => /Root/Implicit/H_RECORD/LIN_LOOP/F_RECORD

string[] qualFields = new string[] { "LIN02", "LIN04", "LIN06", "LIN08", "LIN10", "LIN12", "LIN14", "LIN16", "LIN18", "LIN20", "LIN22", "LIN24", "LIN26", "LIN28", "LIN30" }; 
string[] qualValues = new string[] { "LIN03", "LIN05", "LIN07", "LIN09", "LIN11", "LIN13", "LIN15", "LIN17", "LIN19", "LIN21", "LIN23", "LIN25", "LIN27", "LIN29", "LIN31" }; 
for (var i = 0; i < qualFields.Length; i++) 
{    
    var qual  = getChildValue("../LIN/" + qualFields[i]);    
    var field = getChildValue("../LIN/" + qualValues[i]);    
    if (qual == "BP")    
    {        
        setValue("partBP", field);    
    }    
    if (qual == "EC")    
    {
        setValue("partEC", field);
    }
    if (qual == "CR")
    {
        setValue("partPO", field);
    }
    if (qual == "RC")
    {
        setValue("partRC", field);
    }
    if (qual == "RN")
    {
        setValue("partRN", field);
    }
    if (qual == "VP")
    {
        setValue("partVP", field);
    }
}
return "";

Explanation:

• We declare 2 string arrays
• Then we loop through the array: (start with i= 0)
  • about the getChildValue("../LIN/" + arr[i])
    • we are at /Document/FGrp/Msg/LoopLIN/LoopFST (Source xpath)
    • ../ will move the xpath to upper level (/Document/FGrp/Msg/LoopLIN/)
    • then move to LIN/ record,
    • then we add arr[i] to get element
  • qual variable will get value from xpath: /Document/FGrp/Msg/LoopLIN/LIN/LIN02
  • field variable will get value from xpath: /Document/FGrp/Msg/LoopLIN/LIN/LIN03
  • then we check if the qual equals "BP"
    • we will set value "partBP" by field variable value
  • then we check if the qual equal others, and do like "BP" case
  • then the i will increase 1 and begin the loop again
• At the end of this: we will set right value for keys: partBP, partEC, partPO, partRC, partRN, partVP, so that we can use them later (by calling getValue("partBP")...)

b. The cross reference for EDI look up table.
This is Map code from:
Map: ANSI X12 830 004010 to Horton Planning Schedule FFS Target
Link: /Document/FGrp/Msg/BFR/BFR04 => /Root/Implicit/H_RECORD/LIN_LOOP/F_RECORD/DateTypeCode

return getXrefValue("830 - Schedule Type", value);

Explain:

• We will get value from /Document/FGrp/Msg/BFR/BFR04 (input)
• Then we check the input in Lookup table "830 - Schedule Type"
• if the inputmatch any name in the pair (name, value) of the Lookup table "830 - Schedule Type"
  • Then the function will return the value of that pair
  • But if no pair match then the function will return empty

4. Using cross reference with arrays

a. This code is looking up EDI qualifier and IDs (ZZ:SENDER) based off a vendor code.

Explanation:

• It looks up a value in the lookup table using the variable "result".
• Then it checks to make sure it contains a ":" in the returned value.  If it doesn't, it returns empty which is the double quotes "";
• If it contains a colon ":", then it splits it into an array. 
• Then it assigns the first value as the sender qualifier to a variable. Ex: "ZZ"
• Then it assigns the second the value as the sender ID to a variable. Ex: "SENDER"
• Then it saves each one into a map variable with the setValue function (see above for usage).
• Then it returns the qualifier variable.

5. Check Digit Calculations

This is sample code for calculating the GS1-128 label with check digit

var GS1pre = "08404333";

var seq = value; (this is an nine digit counter)

var gs1Key = GS1pre+seq;

int sum = 0;

for(int i = 0; i < gs1Key.Length; i++)

{

    int digit = int.Parse(gs1Key[gs1Key.Length - 1 - i].ToString());

    if(i % 2 == 0)

    {

        sum += digit * 3;

    }

    else

    {

        sum += digit * 1;

    }

}

int remainder = sum % 10;

int checkDigit = (10 - remainder) % 10;

return "00"+gs1Key+checkDigit.ToString();