lvalverdeb
Posts: 299
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| Posted: 10/12/2004, 10:02 AM |
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In a project I am currently working on, I have several forms with grid lists that need to point to a single maintenance form. Basically that meant that I had to dynamically modify the $Redirect global variable in the maintenance form to return to the appropriate calling form.
I utilised the following 4-function solution and one session variable. These are the steps to implement this functionality;
1) Copy functions below to Common.php or a function library included in your project.
2) Set the "previous" or calling page. Call the following function in the AfterInitialize event of the calling page.
setAsPrevPage();
2) In the Unload Event (at least that what works for me) of the maintenance page (or whatever page you are calling), use the following function:
redirectToPrevPage();
3) On some forms I needed to add this same functionality to a "Return to Prior Page" link. In the AfterInitialize event of the "called" form:
global $YourForm;
setLinkToPrevPage($Path->To->Your->Return->Link);
e.g. setLinkToPrevPage($Link1);
or setLinkToPrevPage($YourForm->Link1);
And that is all there is to it.
I realise similar behaviour can be implemented using JavaScript but I prefer a PHP solution.
All the best
Luis
Here are the required functions:
function setAsPrevPage($PageName="")
{
if (!strlen($PageName))
$PageName = getenv("SCRIPT_NAME");
$QueryString = CCGetQueryString("QueryString","");
if ($QueryString !== "")
$PageName.="?".$QueryString;
CCSetSession("sPrevPage",$PageName);
}
function redirectToPrevPage() {
global $Redirect;
$Redirect = getPrevPage();
}
function getPrevPage()
{
$QueryString = CCGetQueryString("QueryString", "");
$retPage = CCGetSession("sPrevPage","");
return $retPage;
}
function setLinkToPrevPage(&$lnkRef)
{
$prevPage = getPrevPage();
if ($prevPage == null)
$prevPage = getenv("HTTP_REFERER");
$lnkRef->SetLink($prevPage);
return $lnkRef;
}
_________________
lvalverdeb
CR, GMT-6
XAMPP/Ubuntu/CCS3.2/4 |
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SteveG
Posts: 56
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| Posted: 02/06/2005, 9:40 PM |
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Thanks for the great help. I tried to do the redirecting the CCS way through passing/removing parameters; but after a few days of frustration, I'm using your session variables way. Just to add my own techniques to this post, I've got three forms on my page, Add_Record, Edit_Record and Delete_Record; of which I hide two. Each form has a cancel button, which calls my Redirect_to_Previous_Page() function as does the AfterExecuteUpdate and the AfterExecuteInsert. The AfterExecuteDelete needs a special condition, as I didn't want to go back to the page that called it if there was nothing left to show:
global $Record_Delete;
// If coming from the one-up page of this discussion, don't return to empty grid, but go to another page:
if (0 < strpos(Get_Previous_Page(), '&subjtype=2')) { // Indicates page I don't want to go back to.
global $Redirect;
$Redirect = 'Discussions.php?subjtype=1&areaid='.$Record_Delete->areaid->GetValue(); // Calls another page using hidden field values.
} else {
Redirect_to_Previous_Page();
}
... by the way, I took out the second " $QueryString = CCGetQueryString("QueryString", "");" line in your getPrevPage function, I wasn't sure that it needs to be there, and so far the function still works well.
- Steve
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SteveG
Posts: 56
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| Posted: 02/06/2005, 9:55 PM |
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Oh yeah, I forgot, here's the code I use when I add a new record (why return to previous page when there's a new record to mess around with):
global $Redirect;
$Redirect = 'Discussions.php?subjtype=2&discussionid='.mysql_insert_id();
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lvalverdeb
Posts: 299
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| Posted: 02/16/2005, 11:09 AM |
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Cheers Steve. I am glad the post gave you some pointers. Also, you are right about the second $QueryString = CCGetQueryString("QueryString", ""); in the getPrevPage() function. It is not needed at all. Hence, the function would just be:
function getPrevPage() {
return CCGetSession("sPrevPage","");
}
Luis
_________________
lvalverdeb
CR, GMT-6
XAMPP/Ubuntu/CCS3.2/4 |
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