I have a solution with multiple projects. The main output project is a Windows Forms application and there is also a Test project. The test project references the winform project. When I try to add an inherited form, I get the following error:
Could not load load file or assembly 'Microsoft.VisualStudioTestPlatform.TestFramework' version=14.0.0.0 ... invalid pointer (exception from hresult 0x80004003 (E_POINTER))
I don't understand why it's looking for that file since the winforms project is not referencing the test project.
Error
I had this issue many times. I'm not sure why it happens but I found the following workaround to work:
Click Build -> Rebuild Solution
Try to add the inherited form again. This time you might receive an "object reference not set to an instance of an object". Click OK, if you get this error.
Add the inherited form. Should work at this point.
I am wanting to rewrite one of my Revit Add ins so that it utilizes WPF with MVVM because I like the look and functionality of WPF better than Windows Forms.
I have used the Revit Template Wizzard from Jeremy Tammik for the Form based add in, but adding a WPF user control seems not to work (a run time error that the xaml resource cannot be found).
I found a WPF MVVM revit add in example (AddMaterials, here is the github link, which will add materials from an Excel spreadsheet) but it does not follow what I am expecting to see at the top level.
Revit Add ins have an app.cs file which tells Revit how to register and access the DLL (ribbon panel buttons etc).
A windows WPF app will have app.xaml as the top level entry point.
The Add Materials project has neither which tells me that it must be
a class library, however the views are not using UserControls
rather they are Windows which I prefer. However Visual Studio does not
let you add a Window for a Class Library type project.
The third issue is easily solved by simply copying windows from a WPF application project into a class library project. But I don't really understand how the class library will instantiate in Revit without following the app.cs code from the template. Is anyone else creating add-ins this way, and if so can you let me in on any tricks or discussions that will help? Has anyone created a WPF Revit addin template for Visual Studio?
When I add a WPF window and try to instantiate it I get an error that it cannot find the xaml resource (System.IO.IOException: Cannot locate resource 'xxxx.xaml'). I have tried to fix this according to advice found when googling for this error, but to no avail. I am thinking it comes from being in a form based project, and that I may have to just start with a new project without the form stuff.
I have now verified that indeed you can start with the Revit AddIn Wizzard and use WPF . . . I started from scratch and copied in a window created in another project and got it to run (after adding the various references, namespaces, etc). So my problem seems to just be with the original project which already had a bunch of form stuff added.
Yes, I'm using WPF to create Revit Addins. It works well. You can easily create your own WPF template from the SDK samples:
Start with one of the Autodesk-provided SDK samples. I used the "DockableDialogs" sample. I know this one works, your mileage may vary with the others. If you're looking for windows rather than docked panes in the UI, another sample (perhaps the AddMaterials sample) is probably simpler.
I used Visual Studio to turn the sample into a template. File - Export Template -> select "DockableDialogs" or other WPF sample project.
Create a new project based on the template you just created. This was the easiest method I could find to get the WPF internal bits wired up correctly.
I'm not specifically familiar with the AddMaterials project, but to clarify your bullet points.
Revit Addins - It's not the file name (app.cs) but rather they must extend IExternalApplication or IExternalCommand. If you are creating a xaml interface (rather than just running a command from a ribbon button) you'll use 'IExternalApplication' as your entry point. Look for something like this in the sample:
public class ThisApplication : IExternalApplication ...
I don't used a top level app.xaml, but instead have page.xaml pages which are called by the Revit app. In my case these are Pages rather than Windows, which extend the IDockablePaneProvider class. These must be registered with the application which can then can be show, hide, etc your Panes. I imagine this is simpler with Windows, but haven't done it myself. For the dockable panes, your xaml.cs should start out something like:
public partial class MainPage : Page, Autodesk.Revit.UI.IDockablePaneProvider ...
Yes, the project is a class library in the sense that it is a collection of classes, at least one of which extends IExternalApplication or IExternalCommand. Remember that you're not creating a standalone application, but adding functionality to an existing Windows application (Revit). Revit will instantiate the ThisApplication class and then call its .OnStartup() method when the Revit application starts. This shouldn't stop you from adding .xaml or .cs files to the project, though. I can do it using VS Community 2015 using Ctrl-Shift-A.
Hopefully this gets you started - I've been able to implement a WPF UI in Revit without any prior WPF experience, and I'm not even a real programmer, so it's definitely possible. Good Luck!
addendum
If you want to add WPF elements to an existing revit addin, you can follow the instructions here: How can I connect xaml and xaml.cs files
Ultimately I found it easier to migrate my addin code into a template made from a working sample, you may want to try this approach as well.
In short I want to pass variables to a vsto project from my windows form project and I don't know how.
I currently have a windows forms project that is near completion with one major piece missing. I have been searching for about two work days for a way to open a VTSO word project in the same solution with a procedure in my windows form project. I know I can code my project to open the word document and my code for default values for the content controls in the "ThisDocument.vb" display correctly. I have added references to my VTSO project to refer to my forms project in an attempt to use variables previously collected to fill in my content controls text, but I have no clue how to do this. Will I have to open the word document and use interops to modify the document separately? I would prefer my answer in VB.Net but if C# is what ya know, I'll take anything to help.
I have a silverlight sample code that looks like this simple design of just an APP and a PAGE file. I want to recreate this sort of setup from scratch to create a project that ouputs a silverlight program yet it only has these couple of files along with some support files. I went through the creation of a number of Silverlight creations and none produced such a simple and small design. How do I create such a formation that is just an App and a Page and such a few additional files from scratch and still have it output as a silverlight app?
First of all, to create this kind of project - I see you are using Visual Studio 2010, simply go to : file-new-project. On the left window there should be a tab for the templates. Select Silverlight (it will be under Visual C#). In the main window, select "Silverlight application". Once you named your project and click ok, you will be prompted on whether to host the page in a new website. Untick the checkbox and click ok. Now you will have your project exactly as it looks in your image.
Just note though, as you run it in VS, it will automatically generate a page for the app to run in, but since you indicated that it should not create a website to host it in, when wanting to deploy, you will have to create your own page and add the required markup yourself.
I am using using VS2010 and if I have a form open in designer mode and run my application the designer tab will no longer show the form designer but instead an error will be displayed (and it is only fixed by restarting the IDE) saying:
"To prevent possible data loss before loading the designer, the
following errors must be resolved:"
1 Error:
"The designer could not be shown for this file because none of the
classes within it can be designed. The designer inspected the
following classes in the file: ##### --- The base class ##### could
not be loaded. Ensure the assembly has been referenced and that all
projects have been built"
I then shows the following call stack:
at System.ComponentModel.Design.Serialization.CodeDomDesignerLoader.EnsureDocument(IDesignerSerializationManager manager)
at System.ComponentModel.Design.Serialization.CodeDomDesignerLoader.PerformLoad(IDesignerSerializationManager manager)
at Microsoft.VisualStudio.Design.Serialization.CodeDom.VSCodeDomDesignerLoader.PerformLoad(IDesignerSerializationManager serializationManager)
at System.ComponentModel.Design.Serialization.BasicDesignerLoader.BeginLoad(IDesignerLoaderHost host)
Any help is greatly appreciated this is really annoying.
Thanks,
Joel.
I get this visual studio bug too now and then, and I deeply ignore the error text, instead I do the following:
Close the Design-tab
Reopens the Design mode by double click in Solution Explorer, or by right clicking Source code tab and select View Designer
Suddenly everything works again!
If not helping, you may have to change bullet 2 into:
Close and restart Visual Studio.
Maybe this can help you out.
I usually close the visual form, rebuild the solution, right-click then select "view designer" in the form code.
Very, very annoying. I am thinking of dropping back to VS2008.
Close the form. Clean the solution. Rebuild the solution. Reopen the form. Worked for me when nothing else would.
I had this same issue and I was able to resolve this by creating new project and then compiled and run the project and then I imported all the files and ran the project again and automatically it was working again did nothing extra.
I'm able to avoid restarting VS by doing the following
Add a new user control
Drag and drop some of your custom user controls on to it (If it gives you an error, build the solution again).
Reopen your control.
In my case, I have a winforms project with several custom controls that are used by other custom controls. Whenever I open some of those custom controls, I get a the "The base class ..." error. Adding a new custom control, building the project and then adding some custom controls from my project to the new custom control allowed me to open the custom controls that were giving me the "The base class ..." error.
UPDATE: I think I found the problem. My controls were not 'added' properly to the csproj file. In the csproj file, the files for partial classes of UI controls/components need the 'DependentUpon' attribute.
E.x.:
before:
<Compile Include="Windows\Forms\DataGridView.cs">
<SubType>Component</SubType>
</Compile>
<Compile Include="Windows\Forms\DataGridView.Designer.cs" />
after:
<Compile Include="Windows\Forms\DataGridView.cs">
<SubType>Component</SubType>
</Compile>
<Compile Include="Windows\Forms\DataGridView.Designer.cs">
<DependentUpon>DataGridView.cs</DependentUpon>
</Compile>
I had a situation where a custom user control appeared to be creating the error (not sure why) so I removed references to the user control from the form and the error went away.
It seems that after installing SP1 the problem has gone away.
Thanks for your help everyone.
I had the same problem using A control With Generics
MvpUserControl<Presenter,IViewMode> : UserControl
what I do it's Remove the Reference and Add again, Clean and Rebuild the Solution I Hope this can be useful for anybody else
I had the same problem with VS2010 SP1. Finally using Windows Update I saw some updates for Visual Studio and .Net, I installed them and is not happening any more.
Old post, but for those whom may find this...
Just ran in to this error and for me it was relatively simple fix.
Found that it may have something to do with the names of your classes, and renaming the problematic class to a higher order. That is the alphabetical order it appears in the assembly (Where A is higher than Z).
MSDN Article
Good luck.
This error occur if the Form class is not a first class in the file, for example if there is some helper class at the beginning of the file.
To solve this issue, move all other classes except Form class to the bottom of the file.
Don't code in Form1.Designer.cs. Move your logic to Form1.cs (hit F7 on Form1.cs [Design] tab).
"In the project file (.vcxproj), locate the entry for the target
Framework version. For example, if your project is designed to use the
.NET Framework 4.5, locate
v4.5 in the
element of the element. "
(Microsoft)
In my case the "v4.5" didn't exist so I add it, and everything is good now.
I tried clean solution and re-build solution and worked for me.
Hope this help!
This solution works fine, please follow these steps below to solve your problem:
Check the reference if load correctly
Clean the solution and rebuild again
Clean the project and rebuild again
Clean your project and open it again
I was login as administrator in visual studio . I just close my visual studio and again open it without run as administrator and my problem is solved
I ran into this today after upgrading VS2019. I went to properties, configuration tab, and set the projects to Configuration = Debug, Platform = Any CPU. Then it worked.
I faced this issue.
To prevent possible data loss before loading the designer, the following errors must be resolved:
I found solution for this problem:
Close all open tabs, and refresh (sync active documents) the solution.
For more information, you can see this video : https://youtu.be/Q3x2HBd7BDs