Crystal Report：使用Format Object - Suppress Formula隐藏一些对象

I have a report that outputs 4 labels per page.
The data are correctly retrieved from an ArrayList of a class that I have made only for the report and are correctly displayed.
In my class there are also 4 booleans named: Show1, Show2, Show3, Show4, that I'm using for adjust the visibility of 4 Text Objects with a White background, 1 for each label:

我有一份报告，每页输出4个标签。从我仅为报表创建并正确显示的类的ArrayList中正确检索数据。在我的课堂上还有4个布尔名为：Show1，Show2，Show3，Show4，我用它来调整4个文本对象的可见性，白色背景，每个标签1个：

if isnull({MyModel.Show1}) then
  false
else
  if {MyModel.Show1} then 
    true 
  else 
    false

The problem is that the report throws an exception, asking me for a Boolean. But these variables are never null, always false and true when necessary. I have put the null-check for avoid problems, but the exception is thrown without the null check too. I have tried to change the type of the variables, using an int instead of a bool and checking the number, returning true or false if 1 or 0: nothing changes, in this case the exception asks me for an integer.

问题是报告抛出一个异常，问我一个布尔值。但是这些变量永远不会为null，必要时总是false和true。我已经进行了空检查以避免出现问题，但是在没有null检查的情况下抛出了异常。我试图改变变量的类型，使用int而不是bool并检查数字，如果1或0则返回true或false：没有任何变化，在这种情况下异常要求我输入一个整数。

The exception is ErrorKind with the message A boolean is required here or A number is required here in the 2nd case.

例外是ErrorKind，消息需要布尔值，或者在第二种情况下需要一个数字。

I can't understand what is happening...

我无法理解发生了什么......

Any suggestion?

有什么建议吗？

Thanks all

谢谢大家

1 个解决方案

#1

Ok, I've solved the problem.

好的，我已经解决了这个问题。

I have realized that the formula wants the condition, not the return value. So the correct formula, in Crystal syntax, is:

我已经意识到公式需要条件，而不是返回值。所以Crystal语法中的正确公式是：

{MyModel.Show1} = true

If the condition is true, the return will be true, else the return will be false, and all work fine.

如果条件为真，则返回为真，否则返回为假，并且一切正常。

#1