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Asp.net Error Creating Control Could Not Be Set On Property

Other pages get the "Error Creating Control - Object reference not set to an instance of an object." message for all asp controls (html controls show fine). Browse other questions tagged c# asp.net or ask your own question. Eric PS: not sure if that helps but the master page also shows an error in design mode, as below: Error Creating Control - RadSplitterMaster '95' could not be set on The question is how the heck do you figure out this issue for the first time? http://dis-lb.net/asp-net-error/asp-net-error-rendering-control-in-design-mode.php

The issue is an insidious one because it's not debuggable. Steps to reproduce the issue for a Web Application Project (WAP) In the code behind file, WebForm1.asp.cs, add the following code snippet protected override void OnInit(EventArgs e) { base.OnInit(e); Maybe that will cause it to work? Please wait a few minutes and refresh this page.Photo of the day More Photos Top Blog at WordPress.com. http://forums.asp.net/t/1131118.aspx?+Error+Creating+Control+true+could+not+be+set+on+property+ShowRadioButtons+

When I was writing up this code for this post I noticed that after I reintroduced the setter to capture the screen and show the code, the code started failing again. Thanks. The time now is 09:54 AM. One thing I'm going off to try now…removing the file from the project, then re-adding it (so it's "new").

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  2. Workarounds The equivalent workaround code for VB.NET is If Context IsNot Nothing AndAlso Context.Session IsNot Nothing Then We can also check the existence of the property DesignMode instead of checking
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  4. Ravindranath Reply Post Points: 20 All Replies [Infragistics] Petar Ivanov Points 49,288 Replied On: Mon, Apr 23 2012 7:28 AM Reply Hi Ravindranath, Thank you for posting in the
  5. Compiler Error Message: CS1586: Array creation must have array size or array initializer the aspx html for my control looks like the following, which I think is correct:
  6. When i installed trial version i uninstalled RC release.

seems this is bug with AJAX. In the example above the markup looks like this: which is correct for this particular So why the problem here? Following is my code:

Showing results for  Search instead for  Do you mean  K2 Community > Forum > K2 blackpearl > Error creating custom control - Could not set prop... If you have where events are wired up in the OnInit event (e.g. On Design Time I am receiving this error: --- 'Could not set properties for the control 'PasswordBox' used for 'd8174702-9bdf-6a75-dea8-2fa9fcc4bd1b'' Type: System.NullReferenceException Source: setControlProperties() Method Base Member Type: Method Name: https://weblog.west-wind.com/posts/2008/Mar/10/Watch-out-for-Collection-property-Setters-in-ASPNET-Controls Checking DesignMode would work in this scenario, but might not in other scenarios where DesignMode might not be set at the time of checking, or its value was not updated in

I'm sure many more people will have the same headaches over this as i did. 6 years ago marco This work for me: you have to check Session object and also Thanks in advance. Test with Website Project 2. This even if you use the designers "Refresh" option or completely unloading and reloading a page!

Because I don't have to change ANY actual code in the code behind…I just have to tell the .aspx to point to something else…then when I change the code-behind class name this page So we need to check for its existence before trying to access it. Have a nice day 🙂 Comments are closed. © 2016 Microsoft Corporation. Not the answer you're looking for?

By [email protected] in forum ASP.NET Building Controls Replies: 2 Last Post: July 2nd, 08:05 AM Bookmarks Bookmarks del.icio.us StumbleUpon Google Posting Permissions You may not post new threads You may not My home country claims I am a dual national of another country, the country in question does not. done :) This info is on following site. No trackbacks yet.

Type A originates from 'Telerik.Web.UI, Version=2009.1.311.35, Culture=neutral, PublicKeyToken=121fae78165ba3d4' in the context 'LoadNeither' at location 'C:\Documents and Settings\eric.mamet\Local Settings\Application Data\Microsoft\VisualStudio\9.0\ProjectAssemblies\tft-xrhv01\telerik.web.ui.dll'. The fix has now been finalised and released on the MSDN Code Gallery. It shouldn't make a difference anyway though since that server runs external to Visual Studio. Eric Eric 82 posts Member since: Feb 2009 Posted 16 Apr 2009 Link to this post I am not too sure whether this is the answer but...

Privacy Statement| Terms of Use| Contact Us| Advertise With Us| CMS by Umbraco| Hosted on Microsoft Azure Feedback on ASP.NET| File Bugs| Support Lifecycle current community chat Stack Overflow Meta Stack I'm not sure what the cause of this may be, but can you verify that your target framework of your control project is set to .NET 3.5. This time it would work even if I closed and re-opened the page.

If not, why?

Elementary set theory and the reuse of previously defined notation Were slings used for throwing hand grenades? I ended up just reverting the project back to vs2008 for now. I eventually figured it out by looking at those older controls and noticing the following: A collection property that is automatically serialized/deserialized by the ASP.NET designer CANNOT HAVE A SETTER property! Best regards, Daniel the Telerik team Instantly find answers to your questions on the new Telerik Support Portal.

But it won't work in the designer. O'Brien 3,08852957 answered Dec 16 '12 at 18:06 Anonymous 462 add a comment| up vote 2 down vote You can resolve this error by following the below steps , the root When you restarted VS, it shut down the web server, so next time try just shutting down the web server instead of the entire environment. If your questions are more general, you can search our support resources.

My problem is that when I run my application that contains my control, I get the following compilation error: Description: An error occurred during the compilation of a resource required to Copyright 2006 - 2014, JustSkins.com 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 Somehow when I change the code-behind class name then it re-initializes something that otherwise is not being handled and then it works. Regards Reply Post Points: 5 Previous | Next Page 1 of 1 (4 items) | RSS Tweets by @infragistics Recent Posts Re: Setting column width via set_width() in large grids has

See Trademarks or appropriate markings. Oddly, even though the designer bombs, the page will run just fine if you execute it at runtime. If you click that icon and stop the built-in server, the next time you debug it will start a new instance and old code will be flushed. The Property is a fairly standard get and set Public Property ShowRadioButtons() As Boolean Get Return rowRadioButtons.Visible End Get Set(ByVal value As Boolean) EnsureChildControls() rowRadioButtons.Visible

What tool can I use? Why are page events being fired at design time? Best regards, Daniel the Telerik team Instantly find answers to your questions on the new Telerik Support Portal. To Resolve this error , follow the following steps: 1-Right click - you web application project and select Properties -> Web 2- in the server section choose Use IIS Web Server

Any idea? Thanks, Jinal Patel. 6 years ago Web Development Tools Microsoft Alex, Does the workaround mentioned by southwynd or JohnH work for you? 6 years ago LukeT I'm seeing what I think If I make a change to the "Inherits" line, it then magically renders correctly in the designer, however, If I close the page, and re-open it, again, its wont render.