Getting viewstate value from readonly textbox in .NET2 (VB)

Hey guys...

I have a form that asks for several dates.  I tried using asp calendar controls to set values of the date textboxes which were readonly.  I found this annoying since each time I advanced a month and/or selected any date, it posted back and refreshed the page. So, instead, I resorted to an old
javascript function I use a lot.  The javascript creates a pop up (html) window and sets the value of the textbox when the user picks a date.  I had done this many times in ASP.NET1.  However, since upgrading to .NET2, I noticed I was getting errors and the data I was trying to pull and save into
a db from the textboxes was coming up as null.

I did a little research and found out that this was a change made in .NET2. Readonly textboxes can ONLY get their values from Viewstate or serverside code, NOT client side like javascripts.

The only way I can get my page to work is to set readonly to false (bad idea).  The above thread suggests that I use a PreRender sub for the textbox(es).  The suggestion is from a guy as MS.  However, I added this sub to my vb code behind file and nothing happened.  The textbox is still wide

Protected Sub txtStartDate_PreRender(ByVal Sender As Object, ByVal E As
     txtStartDate.Attributes("readonly") = "readonly"
End Sub

Any suggestions or advice?  I really would like to use my javascript  calendar pop up functions to set the value of the textbox AND I'd like to  keep the txtboxes to readonly (duh).  Any advice?

4/12/2006 1:47:30 PM 91979 articles. 2 followers. Follow

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2 things
1. should it be ( guessing )      txtStartDate.Attributes("readonly") = true
2. instead of fighting readonly textboxes - could you use a label ?

Hope That Helps
All that wander, are not lost...
What were we talkin bout
4/12/2006 7:34:19 PM

1 - I'm not following.  I can't set the readonly on page_load because by then, the user could have changed the value of the textbox.  Remember...I was having the txtbox set to readonly and the value was being set by the javascript datapicker.  However, the server side / viewstate was not seeing the value of the readonly textbox.

2 - Nope.  I was hoping to avoid post backs.  To change the value of the label, I would need to postback....and if I were to do that, I would have stuck with the Calendar controls.


4/12/2006 7:54:36 PM

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