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.NET Forum / ASP.NET / General / September 2007Hidden Text Field Occasionally Missing Data on Postback
Greetings. I have an app that's been in production for 3-4 years that is hosted at an ISP. I have an aspx control on the page that uses a few hidden text fields for repositioning logic executed on the server postback. These text fields "always" have data in them. About 5 months ago we started to receive intermitent errors that reveals at postback the value in the text field's value is gone. I am wondering if there hasn't been an upgrade or something at the ISP that somehow is causing this intermittent problem. It happens regardless of the version of IE we are using. It happens both during high volume during the day but also in the off hours...so server loading doesn't seem to be the issue. This is so weird...of course the ISP wants to say its our code...and I'd love for it to be...but this logic has not been touched in a few years. Any ideas...sorry it's not much to go on. Regards, Paul --------------------------------------- Jackson-Reed, Inc. www.jacksonreed.com I'm not sure if this is the issue, but here are two things you should make sure of: Since your code was obviously written in ASP.NET 1.1 if it has been in production for 3-4 years: 1. Make sure your server still supports .NET 1.1 2. Make sure all your code is in the same version of .NET; ASP.NET 1.1 and 2.0 are not compatible with each other I'm not sure what else to say right now, since I haven't seen the code, but I would suggest migrating the code to ASP.NET 2.0 (or if you want to wait for it, the soon to come 3.0) if you haven't already. Migrating from 1.1 to 2.0 can be a big task, but it is usually worth it, and it makes it easier to write code using Visual Studio 2005 (you don't have to worry about telling it what version of .NET you want your code compiled to, you would have to do this if you want your code compiled to 1.1). If you post your code, someone (maybe even me) might be able to help you more. Good Luck!  SignatureNathan Sokalski njsokalski@hotmail.com http://www.nathansokalski.com/ > Greetings. > [quoted text clipped - 24 lines] > --------------------------------------- > Jackson-Reed, Inc. www.jacksonreed.com Nathan, Yes...I've been dreading upgrading to 2.0. Actually many of my clients are still on hold as well with that. I am using a lot of the Infragistic's stuff and Crystal so I am sure that will all be fun. Regarding versions...my Error message that comes back shows both the framework and ASP as 1.1.4322.2407 (so its service pack 1 for version 1.1). I am also going to investigate if any of the hotfix rollups have been applied by the ISP that were issued after the 1.1. service pack was released. Here is the code... Private Sub btnPrevMo_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles btnPrevMo.Click Dim workDate As New Date() 'Lets PreRender know that a control event caused postback controlHandled = True workDate = CDate(txtBeginDate.Text) setupDates(workDate.AddMonths(-1)) 'build the schedule buildSchedule() End Sub The line of code that fails is the CDate(txtBeginDate.Text) where the BeginDate for some reason has nothing in it...thus I get a cast failure. This field should never be blank...ever... Thanks... Paul Signature--------------------------------------- Jackson-Reed, Inc. www.jacksonreed.com > I'm not sure if this is the issue, but here are two things you should make > sure of: [quoted text clipped - 41 lines] > > --------------------------------------- > > Jackson-Reed, Inc. www.jacksonreed.com Does txtBeginDate have ViewState enabled? You must have EnableViewState="True" (which is the default, so you can usually simply not specify this property) in order to retrieve the value from a Control during postback. SignatureNathan Sokalski njsokalski@hotmail.com http://www.nathansokalski.com/ > Nathan, > [quoted text clipped - 96 lines] >> > --------------------------------------- >> > Jackson-Reed, Inc. www.jacksonreed.com Nathan, Yes...it is enabled. Again, what's odd...is that this app has been working just fine...the problem is intermittent and we can't duplicate in our dev environ. I checked the ISPs version of of .NET and we are using the same thing. Argggg! Regards, Paul Signature--------------------------------------- Jackson-Reed, Inc. www.jacksonreed.com > Does txtBeginDate have ViewState enabled? You must have > EnableViewState="True" (which is the default, so you can usually simply not [quoted text clipped - 100 lines] > >> > --------------------------------------- > >> > Jackson-Reed, Inc. www.jacksonreed.com > These text fields "always" have data in them. Where does the data come from...? SignatureMark Rae ASP.NET MVP http://www.markrae.net Mark, In this case it is a Date which represents the current view of a schdule. This data is placed in the hidden field when the page is first sent to the client...which is subsequently posted back. Paul --------------------------------------- Jackson-Reed, Inc. www.jacksonreed.com > > These text fields "always" have data in them. > > Where does the data come from...? Free MagazinesGet these publications absolutely FREE for up to 12 months. There are no hidden fees and no obligation. Simply choose a title, complete the application form and submit it. Read more ...
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