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Visual Studio Designer Error User Control


share|improve this answer answered Sep 2 '08 at 14:36 ljs 21k2792118 add a comment| up vote 1 down vote I discovered why sometimes breakpoints are not hit. It might even be easier to just copy all the code to a text file and then remove it from the Code. You could then re-introduce this step-by-step in the same way to determine which custom control is causing the problem, then go and debug that separately. Compiler Error: "The type or namespace name 'type name' could not be found" You should reference the System.Design assembly. check over here

The "DebuggingExample.sln" solution file will be listed as the most recently used file.Open Form1 in the Forms Designer and select the DebugControl control.Change the value of the DemoString property. The difference is that you will debug a separate instance of Visual Studio that is running your custom control's codeTasks illustrated in this walkthrough include:Creating a Windows Forms project to host Opening the control in the designer gives me: The designer loader did not provide a root component but has not indicated why. Solutions? http://stackoverflow.com/questions/39648/good-way-to-debug-visual-studio-designer-errors

Debug Visual Studio Design Time

Join them; it only takes a minute: Sign up VS 2010 - Error when opening User Control / Form with Designer up vote 8 down vote favorite C#, VS2010, WinForm application: And be reassured, there’s always some logical reason for the assembly mismatch. As of yesterday, however, every time I try to open the form containing the control I get the following error on a rather lurid error screen "Could not find type 'PLREUnderwriting.uctCaseProduct'.

  • I used to be able to simply rebuild the underlying assembly and the problem would be solved, but since I moved to 64bit, this strategy no longer seems to work.
  • Warning - Make a backup copy of your projects folder before doing any of this just in case.
  • This prevents default features such as smart tags and resize glyphs from appearing.
  • Debugging Error: "Illegal cross-thread operation: Control 'control name' accessed from a thread other than the thread it was created on." If you use multithreading in your Windows Forms applications, you must
  • Build servers have to compile and run tests for all configurations because there can be subtle differences.[2] “32-bit tends to be faster anyway”: the current version of the WOW (Windows-on-Windows) runtime
  • The Windows Forms Designer does not support dividing a designable type's definition into more than two partial implementations.
  • In the first instance, open the project which contains this control source code.
  • Walkthrough: Debugging Custom Windows Forms Controls at Design Time .NET Framework (current version) Other Versions Visual Studio 2010 .NET Framework 3.5 .NET Framework 2.0  When you create a custom control, you
  • My 21 yr old adult son hates me Positional Bathroom Etiquette A ring in which the two operations are equal is {0} Output Drift of an operational Integrator Identify a short
  • As i said, it is a bit of a pain in the a** but, it has been the only way i have found on my end to fix the errors without

For more information, see Customizing Development Settings in Visual Studio.Note A Visual C++ control cannot be tested using the UserControl Test Container.To test the run-time behavior of a UserControlCreate a Windows As a side note, you can do this will VS and Office add-ins also. If that doesn't work then try compiling and determining the exception from there. Generate antsy permutations Did early assembly games use hardcoded memory locations?

When I added a resistor to a set of christmas lights where I cut off bulbs, it gets hot. Debugging Design-time Controls Browse other questions tagged .net winforms visual-studio-2010 user-controls design-time or ask your own question. Is there a reason why housekeeping wouldn't accept a tip? http://stackoverflow.com/questions/3620901/vs-2010-error-when-opening-user-control-form-with-designer If the designer did not initialize the components field to null, the C# compiler would produce the following warning: "Form1.components is never assigned to, and will always have its default value

In the future, around year 2500, will only one language exist on earth? Default Designer Behavior Obscured by Custom Behavior The default control designer creates a glyph that covers the entire control on the design surface. You can find these attributes in the System.ComponentModel namespace.You can write a custom designer for your custom control. Q: Is there a chance to somehow use the debugger when the designer opens my component in Visual Studio 2010?

Debugging Design-time Controls

Then I - in VS - added the copied files by clicking add -> exisiting item(s) in the solution explorer. This is named the body glyph. Debug Visual Studio Design Time Hot Network Questions Achieve same random number sequence on different OS with same seed What's in Naboo's core, liquid water or plasma? How To Debug Designer In Visual Studio When this happens, you must shut down Visual Studio, clean all output folders as outlined above and re-open the solution.

Kill all XDesProc.exe instances in Task Manager In Visual studio instance A, open any view (not one that has the exception). check my blog The designer will sometimes be unable to load an assembly because it has been compiled in a way that cannot be loaded by the runtime currently being used by the designer At Encodo, we stopped using the GAC entirely, relying instead on local folders containing all required third-party libraries. Copy Smart tag in a hosted designer raises an exception If you are hosting a designer outside Visual Studio, your smart tags may raise a Design Time Debug In Vb

That’s about all for Visual Studio Designer troubleshooting tips. Worst case, you can crash VS to the desktop without any diagnostic. At this stage (after uninstall) if you try to start VS2010 you will get “unexpected error” at the visual studio splash screen. http://pdctoday.com/visual-studio/visual-studio-designer-error.php Getting Started with Windows Forms Windows Forms Controls Developing Windows Forms Controls at Design Time Developing Windows Forms Controls at Design Time Walkthrough: Debugging Custom Windows Forms Controls at Design Time

When you open Form1 in the Forms Designer, an instance of your custom control will be created and will start running.To debug your custom control at design timeOpen the DebugControl source This is because null is the Common Language Runtime (CLR) default for reference properties. Select TestContainerExample.dll and click the Open button to load the user controls Use the Select User Control ComboBox to switch between the two user controls from the TestContainerExample project.See AlsoUserControlHow to: Author

Now if have to figure out how to get the symbols resolved and then I can tackle the issue.....

share|improve this answer answered May 16 '10 at 18:57 Kevin Phelps 1 "in the second instance run the designer, and the breakpoint will fire"...does not fire... –serhio Dec 9 Many errors include an exact location in the following format: [Project Name] [Form Name] Line:[Line Number] Column:[Column Number]. For more information, see How to: Extend the Appearance and Behavior of Controls in Design Mode. Once you have all references to the UserControl removed from the Designer code and Commented out or removed from the form`s code you can then go to the Build menu and

Firstly I'd suggest attempting to follow the stack trace provided by the designer, though I found that often simply lists a bunch of internals stuff that isn't much use. We can see that the designer was attempting to load version of the third-party component library for DevExpress. What are the disadvantages of a delta wing biplane design? have a peek at these guys For details, see Walkthrough: Creating a Windows Forms Control That Takes Advantage of Visual Studio Design-Time Features.You can debug your custom controls using Visual Studio, just as you would debug any

In this way, we try to control the build configuration and assemblies used when code is downloaded to a new environment (such as a build server). up vote 11 down vote favorite 3 Using Windows 7 and Visual Studio 2010, I am writing a C# custom UserControl. Thursday, September 03, 2015 2:15 PM Reply | Quote Answers 1 Sign in to vote It is usually not recommended to change the code in the Designer file for the Form For details, see NIB:How to: Add Existing Items to a Project.In the Windows Forms Designer, drag a Button control from the Toolbox onto the control's design surface.Press F5 to build the

In Visual Studio instance #2 (the one that you did the Attach To Process in): Put a breakpoint on your usercontrol's constructor In Visual Studio instance #1 (the original one, that Close the test container.Add another user control to the TestContainerExample project. Closing all designer files and rebuilding the application, then opening the Controls/UserControls in the Designer *before* opening the Form that contains these controls usually helps... Dev centers Windows Office Visual Studio Microsoft Azure More...

I assumed VS2010 was still using it (as i could not see .net 4 under installed programs) so I decided to uninstall .net 4.5. But anything is possible. For more information about the partial keyword, see Partial Classes and Methods (C# Programming Guide) and Partial (Visual Basic). probably YOU) didn’t remember to take into account that an assembly might be loaded by x86 code or x64 code or some combination thereof.

This test container starts directly from your Windows control library project.Important For the test container to load your UserControl, the control must have at least one public constructor.Note The dialog boxes