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需要在 Reporting Services 报告中根据以下逻辑显示日期范围，如下所示：

如果只有 Started datetime，则显示如下：

2014 年 12 月 12 日

如果同一天有 Started 和 Finished 日期时间，则显示如下：

2014 年 12 月 12 日上午 11:20 至下午 1:10

如果在不同日期有 Started 和 Finished 日期时间，则显示如下：

2014 年 12 月 12 日上午 11:20 至 2014 年 12 月 13 日下午 1:10 之间

我知道这很丑陋，但我有这个表达式来显示该字段：

=IIf(IsNothing(First(Fields!Finished.Value, "InspectionAdvice")), "on " & Day(First(Fields!Started.Value, "InspectionAdvice")) & " " & MonthName(Month(First(Fields!Started.Value, "InspectionAdvice"))) & " " & Year(First(Fields!Started.Value, "InspectionAdvice")) & " " & 
    IIf(
        Hour(First(Fields!Started.Value, "InspectionAdvice")) > 12, 
        Hour(First(Fields!Started.Value, "InspectionAdvice")) - 12, 
        Hour(First(Fields!Started.Value, "InspectionAdvice"))
    ) 
    & ":" & Minute(First(Fields!Started.Value, "InspectionAdvice")) & " " & 
    IIf(Hour(First(Fields!Started.Value, "InspectionAdvice")) > 12, "pm", "am")
,
IIf(First(Fields!Started.Value.Date, "InspectionAdvice") = First(Fields!Finished.Value.Date, "InspectionAdvice")
    , "on " & Day(First(Fields!Started.Value, "InspectionAdvice")) & " " & MonthName(Month(First(Fields!Started.Value, "InspectionAdvice"))) & " " & Year(First(Fields!Started.Value, "InspectionAdvice")) & " between " & 
    IIf(
        Hour(First(Fields!Started.Value, "InspectionAdvice")) > 12, 
        Hour(First(Fields!Started.Value, "InspectionAdvice")) - 12, 
        Hour(First(Fields!Started.Value, "InspectionAdvice"))
    ) 
    & ":" & Minute(First(Fields!Started.Value, "InspectionAdvice")) & " " & 
    IIf(Hour(First(Fields!Started.Value, "InspectionAdvice")) > 12, "pm", "am")
    & " and " & 
    IIf(
        Hour(First(Fields!Finished.Value, "InspectionAdvice")) > 12, 
        Hour(First(Fields!Finished.Value, "InspectionAdvice")) - 12, 
        Hour(First(Fields!Finished.Value, "InspectionAdvice"))
    ) 
    & ":" & Minute(First(Fields!Finished.Value, "InspectionAdvice")) & " " & 
    IIf(Hour(First(Fields!Finished.Value, "InspectionAdvice")) > 12, "pm", "am")

    , "between " & Day(First(Fields!Started.Value, "InspectionAdvice")) & " " & MonthName(Month(First(Fields!Started.Value, "InspectionAdvice"))) & " " & Year(First(Fields!Started.Value, "InspectionAdvice")) & " " & 
    IIf(
        Hour(First(Fields!Started.Value, "InspectionAdvice")) > 12, 
        Hour(First(Fields!Started.Value, "InspectionAdvice")) - 12, 
        Hour(First(Fields!Started.Value, "InspectionAdvice"))
    ) 
    & ":" & Minute(First(Fields!Started.Value, "InspectionAdvice")) & " " & 
    IIf(Hour(First(Fields!Started.Value, "InspectionAdvice")) > 12, "pm", "am") 
    & " and " & Day(First(Fields!Finished.Value, "InspectionAdvice")) & " " & MonthName(Month(First(Fields!Finished.Value, "InspectionAdvice"))) & " " & Year(First(Fields!Finished.Value, "InspectionAdvice")) & " " & 
    IIf(
        Hour(First(Fields!Finished.Value, "InspectionAdvice")) > 12, 
        Hour(First(Fields!Finished.Value, "InspectionAdvice")) - 12, 
        Hour(First(Fields!Finished.Value, "InspectionAdvice"))
    ) 
    & ":" & Minute(First(Fields!Finished.Value, "InspectionAdvice")) & " " & 
    IIf(Hour(First(Fields!Finished.Value, "InspectionAdvice")) > 12, "pm", "am")
)
)

如果 Started 和 Finished 都不为空，则一切正常。但是，如果 Finished 为空，那么我总是会得到 #Error。

现在，如果我删除包含嵌套 IIf 逻辑的 IIF 的第二部分，例如

=IIf(IsNothing(First(Fields!Finished.Value, "InspectionAdvice")), "on " & Day(First(Fields!Started.Value, "InspectionAdvice")) & " " & MonthName(Month(First(Fields!Started.Value, "InspectionAdvice"))) & " " & Year(First(Fields!Started.Value, "InspectionAdvice")) & " " & 
    IIf(
        Hour(First(Fields!Started.Value, "InspectionAdvice")) > 12, 
        Hour(First(Fields!Started.Value, "InspectionAdvice")) - 12, 
        Hour(First(Fields!Started.Value, "InspectionAdvice"))
    ) 
    & ":" & Minute(First(Fields!Started.Value, "InspectionAdvice")) & " " & 
    IIf(Hour(First(Fields!Started.Value, "InspectionAdvice")) > 12, "pm", "am")
,
"REMOVED"
)

当 Finished 为空时，事情就会起作用。

知道为什么我不能让丑陋的声明的两个部分一起工作吗？我猜 Reporting Services 正在尝试解决某些 IIF 处于错误状态的问题，这些错误条件将命中 NULL Finished 字段并因此导致错误？

4

2 回答 2

2

不知道为什么，但是比较日期的部分导致了错误：

IIf(First(Fields!Started.Value.Date, "InspectionAdvice") = First(Fields!Finished.Value.Date, "InspectionAdvice")

就像你说的，出于某种原因，RS 试图评估Fields!Finished.Value.Date并导致错误。

我简化了您的代码，发现此解决方法运行良好：

=IIf(IsNothing(Fields!Finished.Value), 
    "finished is null", 
    IIf(DateDiff(DateInterval.Day, Fields!Finished.Value, Fields!Started.Value)=0,  
        "same day",
        "different day"
        )
    )

结果： 生成报告生成器 3.0

于 2015-07-21T08:23:38.783 回答
2

在 SSRS 中，两个 IIF 分支都被评估。见这里。因此，正如您正确怀疑的那样，错误。

尝试修改您的数据集InspectionAdvice以返回空白，而不是null在它们没有结束日期时返回。您可以使用 SQLISNULL函数

SELECT Started, ISNULL(Finished, '') Finished
FROM [SomeTable]
于 2015-07-21T08:55:58.947 回答