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Sample report to access global variable

Ulf

Hey there,

can you tell me how to set a global variable and how i can access to a global variable ?

Birt Engine: 2.6.1

What I try to do?
I try to set an global variable which has an number. It can be 1 or 0.
And if this variable is 0, one of my grids should disappear(visibilty=true).

Best wishes
Ulf

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Comments

mwilliams

Hi Ulf,

How is this global variable set? By a parameter? By data in your dataSet?

Ulf

if(row['__ronnum'] > 10)
{
var test = 1;
reportContext.setPersistentGlobalVariable("breakpage",test);
}

Thats what in my dataset script.

mwilliams

You'll have to set the value of the PGV to test.toString(). Then, when you recall it later in your script, you'll have to do:

temp = parseInt(reportContext.getPersistentGlobalVariable("breakpage"));

PGV's only store strings and objects.

Hope this helps.

Ulf

in my dataset i've got now: 
 
<pre class='_prettyXprint _lang-auto _linenums:0'>
var test= 0;

if(row['__ronnum'] > 47)
{
test.toString = 1;
reportContext.setPersistentGlobalVariable("breakpage",test);
}
</pre>
 
Is that right? 
 
Then i want to set an Expression to my grid (visibilty). 
 
<pre class='_prettyXprint _lang-auto _linenums:0'>
if(breakpage == 1)
{
true;
}
</pre>
 
Can you correct me, if it's wrong !? 
 
Thanks a lot.

mwilliams

It'll need to be something like: 
 
<pre class='_prettyXprint _lang-auto _linenums:0'>
var test = 0;
if(row['__ronnum'] > 47){
test = 1;
reportContext.setPersistentGlobalVariable("breakpage",test.toString());
}
</pre>
 
<pre class='_prettyXprint _lang-auto _linenums:0'>
temp = parseInt(reportContext.getPersistentGlobalVariable("breakpage"));
if (temp == 1){
true;
}
else{
false;
}
</pre>

Ulf

In my table i've got now in the "onPrepare" Script 
 
<pre class='_prettyXprint _lang-auto _linenums:0'>
var test= 0;

if(row['__ronnum'] > 47)
{
umbruch = 1;
reportContext.setPersistentGlobalVariable("breakpage",test.toString());
}
</pre>
 
 
The if-clause doesen't work. Any ideas?

mwilliams

The data isn't avaialble in the onPrepare method. You'd have to do that in the onCreate method.