(DataFlex) Call a JavaScript Function Returning an Array

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Note: This example requires Chilkat v11.4.0 or greater.

Chilkat ActiveX Downloads ActiveX for 32-bit and 64-bit Windows

Use ChilkatAx-win32.pkg

Procedure Test
    Boolean iSuccess
    Variant vSbScript
    Handle hoSbScript
    Handle hoJs
    Variant vResult
    Handle hoResult
    Variant vFuncCall
    Handle hoFuncCall
    Integer iCount
    Integer i
    String sTemp1
    Integer iTemp1

    Move False To iSuccess

    // ----------------------------------------------------------------------------------
    // The Javascript functions called in this example are shown at the bottom of this page.
    // -----------------------------------------------------------------------------------

    Get Create (RefClass(cComChilkatStringBuilder)) To hoSbScript
    If (Not(IsComObjectCreated(hoSbScript))) Begin
        Send CreateComObject of hoSbScript
    End
    Get ComLoadFile Of hoSbScript "js_function_returning_array.js" "utf-8" To iSuccess
    If (iSuccess = False) Begin
        Get ComLastErrorText Of hoSbScript To sTemp1
        Showln sTemp1
        Procedure_Return
    End

    Get Create (RefClass(cComChilkatJs)) To hoJs
    If (Not(IsComObjectCreated(hoJs))) Begin
        Send CreateComObject of hoJs
    End

    Get Create (RefClass(cComChilkatJsonObject)) To hoResult
    If (Not(IsComObjectCreated(hoResult))) Begin
        Send CreateComObject of hoResult
    End
    Set ComEmitCompact Of hoResult To False

    // Call Eval to add the function to the context's global object
    Get pvComObject of hoSbScript to vSbScript
    Get pvComObject of hoResult to vResult
    Get ComEval Of hoJs vSbScript vResult To iSuccess
    If (iSuccess = False) Begin
        // Examine the result for an exception.
        Get ComEmit Of hoResult To sTemp1
        Showln sTemp1

        // Also examine the LastErrorText.
        Get ComLastErrorText Of hoJs To sTemp1
        Showln sTemp1
        Procedure_Return
    End

    // ------------------------------------------------------------------------------
    // Call each function

    Get Create (RefClass(cComChilkatJsonObject)) To hoFuncCall
    If (Not(IsComObjectCreated(hoFuncCall))) Begin
        Send CreateComObject of hoFuncCall
    End

    // Create JSON specifying the function name and arguments
    // The function has no arguments, so we only specify the name.

    Get ComUpdateString Of hoFuncCall "name" "getDays" To iSuccess

    Get pvComObject of hoFuncCall to vFuncCall
    Get pvComObject of hoResult to vResult
    Get ComCallFunction Of hoJs vFuncCall vResult To iSuccess
    If (iSuccess = False) Begin
        // Examine the result for an exception.
        Get ComEmit Of hoResult To sTemp1
        Showln sTemp1

        // Also examine the LastErrorText.
        Get ComLastErrorText Of hoJs To sTemp1
        Showln sTemp1
        Procedure_Return
    End

    Get ComEmit Of hoResult To sTemp1
    Showln sTemp1

    // Output:
    // {
    //   "type": "array",
    //   "value": [
    //     "Monday",
    //     "Tuesday",
    //     "Wednesday",
    //     "Thursday",
    //     "Friday"
    //   ]
    // }

    // Access each array value..
    Get ComSizeOfArray Of hoResult "value" To iCount
    Move 0 To i
    While (i < iCount)
        Set ComI Of hoResult To i
        Get ComStringOf Of hoResult "value[i]" To sTemp1
        Showln sTemp1
        Move (i + 1) To i
    Loop

    // ------------------------------------------------------------------------------
    // Call the getRange(start,end) function

    Send ComClear To hoFuncCall
    Get ComUpdateString Of hoFuncCall "name" "getRange" To iSuccess
    Get ComUpdateInt Of hoFuncCall "args[0]" 14 To iSuccess
    Get ComUpdateInt Of hoFuncCall "args[1]" 21 To iSuccess
    Get pvComObject of hoFuncCall to vFuncCall
    Get pvComObject of hoResult to vResult
    Get ComCallFunction Of hoJs vFuncCall vResult To iSuccess
    Get ComEmit Of hoResult To sTemp1
    Showln sTemp1

    // Output:
    // {
    //   "type": "array",
    //   "value": [
    //     14,
    //     15,
    //     16,
    //     17,
    //     18,
    //     19,
    //     20,
    //     21
    //   ]
    // }

    Get ComSizeOfArray Of hoResult "value" To iCount
    Move 0 To i
    While (i < iCount)
        Set ComI Of hoResult To i
        Get ComIntOf Of hoResult "value[i]" To iTemp1
        Showln iTemp1
        Move (i + 1) To i
    Loop

    // ------------------------------------------------------------------------------
    // Call the getEmployees() function

    Send ComClear To hoFuncCall
    Get ComUpdateString Of hoFuncCall "name" "getEmployees" To iSuccess
    Get pvComObject of hoFuncCall to vFuncCall
    Get pvComObject of hoResult to vResult
    Get ComCallFunction Of hoJs vFuncCall vResult To iSuccess
    Get ComEmit Of hoResult To sTemp1
    Showln sTemp1

    // Output:
    // {
    //   "type": "array",
    //   "value": [
    //     {
    //       "id": 101,
    //       "name": "Alice",
    //       "role": "Dev"
    //     },
    //     {
    //       "id": 102,
    //       "name": "Bob",
    //       "role": "Manager"
    //     }
    //   ]
    // }

    Get ComSizeOfArray Of hoResult "value" To iCount
    Move 0 To i
    While (i < iCount)
        Set ComI Of hoResult To i
        Get ComStringOf Of hoResult "value[i].name" To sTemp1
        Showln "name: " sTemp1
        Get ComStringOf Of hoResult "value[i].role" To sTemp1
        Showln "role: " sTemp1
        Get ComIntOf Of hoResult "value[i].id" To iTemp1
        Showln "id: " iTemp1
        Showln ""
        Move (i + 1) To i
    Loop



End_Procedure

function getDays() {
    return ["Monday", "Tuesday", "Wednesday", "Thursday", "Friday"];
}

function getRange(start, end) {
    var arr = [];
    for (var i = start; i <= end; i++) {
        arr.push(i);
    }
    return arr;
}
// Usage: getRange(1, 5) -> [1, 2, 3, 4, 5]

function getEmployees() {
    return [
        { id: 101, name: "Alice", role: "Dev" },
        { id: 102, name: "Bob", role: "Manager" }
    ];
}