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Hi,
 
I've got a web form which users have to select a number from a drop-down
list and on postback that number of rows are inserted into a table below
the drop-down box. Each row has a couple of text boxes and the last row
has a submit button.
 
That all works fine, BUT.
 
When the button is pressed the following error comes up:
 
Specified cast is not valid       (I've pasted the trace info at the
bottom of this email.)
 
I've tried several things, including trying to recreate the rows in the
Page_Load and Page_Init subs and I've specified EnableViewState=false on
all the rows and textboxes but I still get this error.
 
I've been playing with this for 3 days now and I'm sure there is
something stupid I'm missing - can anyone help?
 
Thanks,
Matt
 
Trace info:
[InvalidCastException: Specified cast is not valid.]
   System.Web.UI.WebControls.WebControl.LoadViewState(Object savedState)
   System.Web.UI.Control.LoadViewStateRecursive(Object savedState)
   System.Web.UI.Control.LoadViewStateRecursive(Object savedState)
   System.Web.UI.Control.LoadViewStateRecursive(Object savedState)
   System.Web.UI.Control.LoadViewStateRecursive(Object savedState)
   System.Web.UI.Control.LoadViewStateRecursive(Object savedState)
   System.Web.UI.Control.LoadViewStateRecursive(Object savedState)
   System.Web.UI.Page.LoadPageViewState()
   System.Web.UI.Page.ProcessRequestMain() +418
 

Category
Message
From First(s)
From Last(s)

aspx.page
Begin Init
 
 

aspx.page
End Init
0.000503
0.000503

aspx.page
Begin LoadViewState
0.000719
0.000216

Unhandled Execution Error

Specified cast is not valid.
  at System.Web.UI.WebControls.WebControl.LoadViewState(Object
savedState)
  at System.Web.UI.Control.LoadViewStateRecursive(Object savedState)
  at System.Web.UI.Control.LoadViewStateRecursive(Object savedState)
  at System.Web.UI.Control.LoadViewStateRecursive(Object savedState)
  at System.Web.UI.Control.LoadViewStateRecursive(Object savedState)
  at System.Web.UI.Control.LoadViewStateRecursive(Object savedState)
  at System.Web.UI.Control.LoadViewStateRecursive(Object savedState)
  at System.Web.UI.Page.LoadPageViewState()
  at System.Web.UI.Page.ProcessRequestMain()