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Asp.net Error Rendering Control In Design Mode

Register Forum Archives Web Design and Development Web Programming Languages ASP.NET ASP.NET Building Controls CompositeControl fails to display in Design view CompositeControl fails to display in Design view - ASP.NET Building You can also skip to specify the exact assembly version to prevent future conflicts. Have a nice day 🙂 Comments are closed. © 2016 Microsoft Corporation. Could you explain how when using a ascx (user control) file everything is fine what extra functionality does this impliment in adition to a custom control? http://dis-lb.net/asp-net-error/asp-net-error-creating-control-could-not-be-set-on-property.php

Thanks, Jinal Patel. 6 years ago JohnH I am getting this error with the release version of VS 2010. Try deleting the contents of the license.licx file or the entire file so Visual Studio can generate it again. If you for some reason cannot upgrade to Visual Studio 2008 SP1 you might face the following exception after upgrading to Telerik UI for ASP.NET Ajax Q1 2009 or later: Error Give additional feedback Give article feedback Tell us how we can improve the information Code samples are inaccurate/outdated.

I'm not sure which "required control settings" to customize, and what settings should I be applying to get this scenario working? The time now is 09:40 AM. The reasons are many - better separation of concerns, less assembly references for the main assembly (Telerik.Web.UI.dll).

  1. lol User ProfileView All Posts by UserView Thanks sam_s #5 Posted : Thursday, September 20, 2012 12:37:24 PM(UTC) Rank: YAF ForumlingReputation: Joined: 9/19/2012(UTC)Posts: 7Thanks: 2 times Hi tha_watcha,I was hoping
  2. This will take some time, so I will only do this if you really want to put some time into checking out the code..
  3. Yes No Log In Products Suites BEST VALUE Universal (includes all DevExpress .NET products in one integrated suite) DXperience (includes all DevExpress .NET Controls along with CodeRush) .NET Products INDIVIDUAL PLATFORMS
  4. There are three ways to solve this problem (apart from the obvious upgrade to Visual Studio 2008 SP1): Bin-deploy the design-time assembly This solution would work only in case you have
  5. You would have both drawn and ready to go in the control itself. –Blindy Jan 5 '11 at 17:28 @Blindy: I have tried overriding the Render* methods.
  6. When Visual Studio 2013 is used together with TFS and Get Everything when a solution or project is opened under Options > Source Control -> Environment is checked.
  7. Type B originates from 'Telerik.Web.UI,Version=[Version], Culture=neutral, PublicKeyToken=121fae78165ba3d4' in the context 'LoadNeither' at location '[location2]'.") Reasons: Using the Trial and the Dev variations of the Telerik controls assembly (having the same version)
  8. 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

I tried following way 1. Thanks. 6 years ago Web Development Tools Microsoft NickH, Are you saying that a new page with the exact same content in the code behind file would work fine, but the 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 TagPrefix:MyControl could not be set on property 'MyProperty'.

how VS 2003 used to do it, if you have apps upgraded from .NET 1.1), you get null reference exceptions all over the page. The associated code can be found in the codebehind file controlname.ascx.cs and some controls located in the YAF.Controls Project User ProfileView All Posts by UserView Thanks sam_s #7 Posted : After i've check about "designmode", I get error "Object Reference not set" Please Help !!! https://www.experts-exchange.com/questions/23914617/How-to-handle-exception-Error-rendering-control-at-designMode-in-Visual-Studio.html Please refer to the DevExpress.com Website Terms of Use for more information.

As with the other guys, everything works fine at run-time. It is tough without seeing the code as to why it might be complaining. Any ideas? 6 years ago Web Development Tools Microsoft Hi John, The equivalent code in VB.NET would look like: Protected Overrides Sub OnInit(ByVal e As System.EventArgs) InitializeComponent() MyBase.OnInit(e) 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

You cannot create polls in this forum. https://www.devexpress.com/Support/Center/Question/Details/Q481528 See Also General Troubleshooting Web Resources Troubleshooting ToolBox Troubleshooting Skins Troubleshooting Was this article helpful? I help millions of people every day, but am taken for granted by all but one Did Donald Trump call Alicia Machado "Miss Piggy" and "Miss Housekeeping"? The reason for the error is that the .NET Framework cannot distinguish the Dev assembly from the Trial one.Once one assembly loaded in the Visual Studio AppDomain, it cannot be unloaded

Comment Submit Your Comment By clicking you are agreeing to Experts Exchange's Terms of Use. Want to Advertise Here? In Order to debug a Custom Control you need to Start ANOTHER copy of Visual Studio along side your existing one,and pointing it to a test website. We now have the freedom to extend the design time capabilities of Telerik UI for ASP.NET Ajax without bloating the main control assembly.

This is similar to an ObjectDataSource that shows up as a gray box in the aspx design mode. Test With WebApplication Project with default application 3. Moment of selecting a target from an ability of a planeswalker Why are some programming languages turing complete but lack some abilities of other languages? You cannot have modules.

errors.png Show all comments Dhaval.Shah 03.14.2013 Hi Diedrik, just my 0.02$ worth. Posted on 2008-11-18 .NET Programming ASP.NET 1 Verified Solution 4 Comments 1,685 Views Last Modified: 2013-11-26 I have created a custom control which is doing exactly as it should, but for That means that group Moderators can moderate the forum too or the user is in the group.

Just press F5 to start your debugging Adventure...

You can change all properties without any problems except for the properties 'Failure' and 'Success'. A bit annoying that I have to add this code, but Ill take it for now! 6 years ago luker459 This worked for me because after hours of searching i came thanks for the tip. Show all comments Jürgen Kessler 10.29.2012 got the same rendering error in designmode.

This does seem to be a rather serious oversight, considering the page runs fine and VS 2008 didn't have this bug. 6 years ago Web Development Tools Microsoft We have an For example: #in the custom controldesigner's "GetDesignTimeHtml" method, we can define our own html fragment that want to output at design-time ====================== [Designer(typeof(TestWebControlDesigner), typeof(IDesigner))] public class TestWebControl : CompositeControl { .............. Thanks. 6 years ago Chathu Hi, Thanks a lot of the instructions. Featured Post How to run any project with ease Promoted by Quip, Inc Manage projects of all sizes how you want.