Web Forms :: Reference Controls Between Content Pages?
Jan 12, 2010
I'm starting to play around with MasterPages in VB.NET 2005, and have run into a problem. The idea is to present a Content page with a DropDownList that has some values in it, have the user select one, then navigate to the next Content page. The resulting Content page will then display some information based on whatever value the user chose on the initial Content page.
I had done something similar to this a year or two ago (but using C# 2005, without MasterPages, and the control was a ListBox not a DropDownList) and the way I did it then was to set up an object in the Next page, then assign that the result of (ListBox)Page.PreviousPage.FindControls("ControlName"); from there I could dink around with the 'local' copy of the object and its values. So now I'm trying to do this in VB while implementing a MasterPage, but I get an Object Not Set To An Instance Of An Object error.
The code looks something like this (assume the previous page has a control ID DDLRecordSelect)
[Code]....
I thought maybe it was something funky with the ViewState so I tried it with a TextBox that had a hard-coded value, and got the same result. Am I approaching this the wrong way entirely, or is there hope? I would prefer to NOT use QueryString to pass variables between pages, because IIRC I had to use this local copy of the object business before because the ListBox results were too lengthy.
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