如何将变量传递给ReportViewer中的表达式 [英] How to Pass a Variable to an Expression in the ReportViewer

问题描述

大家好，

我不确定这是否可行，但是我想为本地的一个表的Visibility选项卡设置一个表达式RDLC报告检查变量的值。基本上，我有一个布尔变量， PrintSysInfo ，在我的解决方案的公共模块中设置：

I'm not sure if this is possible, but I want to set an expression for the Visibility tab of a table that I have in a local RDLC report to check the value of a variable.  Basically, I have a boolean variable, PrintSysInfo that is set in the Public Module of my solution:

公共 PrintSysInfo As Boolean = False

Public PrintSysInfo As Boolean = False

我以另一种形式引用它，它可以设置为True或False。当我的报告运行时，我希望只有当 PrintSysInfo 为True时才显示此特定表。

I refer to it in another form where it can be set to True or False.  When my report runs, I want to have this particular table show up only if PrintSysInfo is True.

我希望能够进入"可见性"选项卡在表中，将其设置为Expression，然后输入如下内容：

I was hoping to be able to go into the Visibility tab of the table, set it to Expression and then put in something like:

= iif（PrintSysInfo =真，假，真）

=iif(PrintSysInfo = True, False, True)

但如果我把它放在那里然后尝试运行我的代码，我会收到以下错误：

But if I put this in there and then try to run my code, I get the following error:

表'table1'的隐藏表达式包含错误：[BC30451]名称'PrintSysInfo'未声明。

有没有一种简单的方法可以解决这个问题或其他解决方案？

Is there an easy way to fix this or another solution to my problem?

感谢您的帮助!! ！

- 吉姆

推荐答案

我认为您需要添加对程序集的引用（http://msdn2.microsoft.com/en-us/library/ms155974.aspx ） - 否则您无法访问该属性从报告中。

I think you need to add a reference to your assembly (http://msdn2.microsoft.com/en-us/library/ms155974.aspx) - otherwise you cannot access that property from within the report.

有关在报告中使用嵌入式代码和自定义程序集的一般信息：http://msdn2.microsoft.com/en-us/library/ms155798.aspx

General information about using embedded code and custom assemblies in reports: http://msdn2.microsoft.com/en-us/library/ms155798.aspx

- 罗伯特

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