reporting-services - Crystal Reports 公式中的错误

Question

我有一个全局变量，它是在我文档的 Report Header 部分的公式中声明的。然后我尝试引用该变量以在 for 循环中使用它，但出现错误:

A number, currency amount, boolean, data, time, date-time, or string is expected here.

这里有什么问题，我该如何纠正？代码如下:

标题公式:

Global StringVar Array items;
redim items [1];

Global StringVar Array jobs;
redim jobs [1];

Global StringVar Array POs;
redim POs [1];

Global StringVar Array Qty;
redim Qty [1];

Global NumberVar numRecordsPrinted;
numRecordsPrinted := 0;

""

详细公式:

    Local NumberVar occurances;
    Local StringVar poTOuse;
    Local NumberVar i;

    if {%Line_PO_Test} <> ''
    and {PackingSlipHeader.CompanyCode} <> '10063'
    and {PackingSlipHeader.CompanyCode} <> '10017'
    then 
        //Count the number of occurances 
        For i := 0 To numRecordsPrinted Do       //Error on numRecordsPrinted
        (
            if items[i] = {PS_DETAIL_FOR_PRINT.DTSItemNumber}
                AND jobs[i] = {PS_DETAIL_FOR_PRINT.JobNumber}
                And Qty[i] = {PS_DETAIL_FOR_PRINT.Quantity_Shipped}
                THEN
                    occurances := occurances + 1
        )

        //Use the # of occurances to get the right PO number
Select occurances 
        case 0: poTOuse := {@LinePOnum}
        case 1: poTOuse := {@Line_PO_3}
        case 2: poTOuse := {@Line_PO_2}

        default: poTOuse := "";


        //Save data into the array and increment for next time
        numRecordsPrinted := numRecordsPrinted + 1
        items[numRecordsPrinted] := {PS_DETAIL_FOR_PRINT.DTSItemNumber}
        jobs[numRecordsPrinted] := {PS_DETAIL_FOR_PRINT.JobNumber}
        Qty[numRecordsPrinted] :=   {PS_DETAIL_FOR_PRINT.Quantity_Shipped}

    //Print to the report
    'PO#: ' + poTOuse;

Answer 1

当然是这一点:

    Select occurances 
        case 0: poTOuse = LinePOnum
        case 1: poTOuse = Line_PO_3
        case 2: poTOuse = Line_PO_2

        default: poTOuse = "";

应该

    Select occurances 
        case 0: poTOuse := LinePOnum
        case 1: poTOuse := Line_PO_3
        case 2: poTOuse := Line_PO_2

        default: poTOuse := "";

虽然还不清楚 LinePOnum、Line_PO_3 和 Line_PO_2 是什么。