无法加载文件或程序集'RevitApi'版本= 19.0.0.0，

Question

I've been creating an add-in for the program 'Revit' for the past few weeks now. It all went fine, but all of a sudden, whenever I try to set the DataSource of my DataGridView to my class getEntiteitenData , I get the error :

Error using the dropdown: Could not load file or assembly 'RevitAPI, Version=19.0.0.0, Culture=neutral, PublicKeyToken=null' or one of its dependencies. The system cannot find the file specified.

I did not change the files location or anything, and the .dll is loaded in all the classes. Also, I have used this method on another DataGridView and it worked fine. The only difference I can tell so far, is the one where it works, it is an Windows Form , the other, where it doesn't work, it's an user control

The most annoying thing about this is, when it gives the error, it shuts down my visual studio.

Any help would be greatly appreciated!

Answer 1

You can try this.

Add this line to the main class of your application. This must be called before anything.

        AppDomain.CurrentDomain.AssemblyResolve += new ResolveEventHandler(CurrentDomain_AssemblyResolve);

Add this code to you aplication.

static System.Reflection.Assembly CurrentDomain_AssemblyResolve(object sender, ResolveEventArgs args)
        {
            string assemblyFullName;

            System.Reflection.AssemblyName assemblyName;

            assemblyName = new System.Reflection.AssemblyName(args.Name);
            assemblyFullName = System.IO.Path.Combine(
                System.IO.Path.Combine(
                    System.Environment.GetFolderPath(Environment.SpecialFolder.ProgramFilesX86), <You folder>), assemblyName.Name + ".dll");

            if (System.IO.File.Exists(assemblyFullName))
                return System.Reflection.Assembly.LoadFile(assemblyFullName);
            else
                return null;
        }

This will load only the assemblies in the folder of your application or the folder defined by you

Answer 2

For some reason the problem was only occuring when i'm binding the data from the designer window. I tried binding it by code, and this worked !

After I added this to my Designer.Cs:

private System.Windows.Forms.BindingSource getEntiteitenDataBindingSource3;
this.getEntiteitenDataBindingSource3 = new System.Windows.Forms.BindingSource(this.components);
((System.ComponentModel.ISupportInitialize)(this.getEntiteitenDataBindingSource3)).BeginInit();
this.entiteitenGrid.DataSource = this.getEntiteitenDataBindingSource3;
this.getEntiteitenDataBindingSource3.DataSource = typeof(getEntiteitenData);
((System.ComponentModel.ISupportInitialize)(this.getEntiteitenDataBindingSource3)).EndInit();

Everything seems to work now, and the Columns I wanted to bind are actual visual in the designer now.