Question

我很困惑在水晶报告中编写自定义功能以使用记录选择来获取记录。

当我们在记录选择中创建公式时，它将根据使用的参数在生成的SQL-Query中添加where子句。现在我想编写自定义公式，它将以编程方式提取记录：

即使我写了一个函数：

Function (stringVar st)(
   stringVar selection; 
   if (st <> 'ALL') then (
        selection = st;
    )
    else(
        //In this case the user select only single value, it will fetch the result to that                //particular column value in the table.. otherwise it leaves that particular row..
        selection = "multiple selection";

    )
)

现在使用select expert在记录选择中使用自定义函数的代码是：

 if(myfunction({?parameter1}) <> "ALL") then
    (
        // what code should i write to select that particular record...
        if(myfunction({?parameter2})) <> "ALL" ) then
        (
            //do selection from the previously selection of rows which have this parameter
             if(myfunction({?parameter3}) <> "ALL") then
             (
                 //do selection from the previously selection of rows which have this 
                 //parameter
             )
             else (//do something else) 
        )
        else (//do something else)
    )
    else (//do something else)

提前谢谢。

Answer 1

您不需要自定义功能。假设你有两个字符串参数，ry：

// assumes you have a parameter value of 'All Countries' w/ a value of '0'
( '0' IN {?CountryCodes} OR {table.CountryCode} IN {?CountryCodes} )
// assumes you have a parameter value of 'All Regions' w/ a value of '0'
AND ( '0' IN {?RegionCodes} OR {table.RegionCode} IN {?RegionCodes} )

如何在水晶报告中编写自定义功能用于记录选择

1 个答案: