Stack Overflow
Stack Overflow

Questions tagged [invalidoperationexception]

The exception that is thrown when a method call is invalid for the object's current state.

The exception that is thrown when a method call is invalid for the object's current state.

More information is available on Docs.

505 questions
2
votes
3 answers

Errors with Foreach Loop through a List

I have the following piece of code that is giving me problems and I would appreciate any help: private static string CreateOptionString(List Options) { StringBuilder returnValue = new StringBuilder(); foreach (VehicleOption…
jkruer01
  • 2,175
  • 4
  • 32
  • 57
2
votes
1 answer

getting operation not supported when adding or removing from List?

Begginer android programer, I want add and remove item from String list when user click on listitem, but i get operation not supported error on trying to do that. See following code to understand what i want to do. @Override protected void…
Ravi Patel
  • 2,136
  • 3
  • 32
  • 48
1
vote
0 answers

Why is my LEFT JOIN an invalid operation (MS ACCESS 2003)

I have a query which looks very much like this: SELECT * FROM t1 LEFT JOIN t2 ON t1.aNumber = t2.aNumber; When I try to run it, I get Invalid Operation. Both of the following queries run fine though: SELECT * FROM t1; SELECT * FROM t2; So I'm…
Shawn
  • 10,931
  • 18
  • 81
  • 126
1
vote
3 answers

InvalidOperationException using Datacontext

I'm getting an InvalidOperationException when I run this (it says "cannot determine the attribute name"). I have checked the net but haven't found a solution. It occurs at the foreach (var c in contacts) line. DataContext ctx = new…
Paul
  • 1,375
  • 2
  • 21
  • 55
1
vote
1 answer

EF4 code first fluent mapping does not work with inherited properties?

Did anyone ever tried mapping an inherited property? Because I would be glad to hear that just works and that I am making a mistake somewhere, as I am getting the following error: "The property 'UserName' is not a declared property on type…
Sipke Schoorstra
  • 3,074
  • 1
  • 20
  • 28
1
vote
3 answers

An entity object cannot be referenced by multiple instances of IEntityChangeTracker

I have a model called Message. In the model there is a ICollection ResourceSubscribers of another model called Resource. When I try to public void SaveMessage(List subscribers) { Condition.Requires(model).IsNotNull(); …
dload
  • 11
  • 3
1
vote
2 answers

"InvalidOperationException: Object is currently in use elsewhere" during innocuous onpaint?

For some reason we are getting "InvalidOperationException: Object is currently in use elsewhere." during our custom OnPaint, below (that's actually almost a line for line copy of the code... there's that little there). We have logging in the…
Nate Finch
  • 253
  • 3
  • 13
1
vote
1 answer

System.InvalidOperationException: 'An error was generated for warning 'Microsoft.EntityFrameworkCore.Query.InvalidIncludePathError'

I get this error: System.InvalidOperationException: 'An error was generated for warning 'Microsoft.EntityFrameworkCore.Query.InvalidIncludePathError': Unable to find navigation ' ApplicationUser' specified in string based include path '…
Muddassar Pervaiz
  • 11
  • 1
1
vote
2 answers

Silverlight InvalidOperationException when clicking a link

I have a dynamically generated hyperlink which when clicked should open a lotus notes document. I do it using the code below. HyperlinkButton hlb = new HyperlinkButton(); hlb.SetBinding(HyperlinkButton.ContentProperty, new Binding("Properties[" +…
user480184
1
vote
0 answers

webmethod with optional C# arguments appear to be required when invoked as a RESTful URI - gives InvalidOperationException: Missing parameter

I have a webmethod which works and I've added some optional parameters (because I don't want to burden all callers with providing these values; they are primarily for my development needs since my webmethod constructs a diagnostic…
John Adams
  • 4,773
  • 25
  • 91
  • 131
1
vote
0 answers

No service for type 'Microsoft.Maui.IApplication' has been registered thrown on Android MAUI.NET

I have a MAUI.NET app that is running well on Windows. Now I want to give it a try for Android. I have plug in real local Android device with Android 11, set all projects to .NET 6, enabled developer mode and USB debugging... After all it compiled…
jaydopartu
  • 63
  • 1
  • 8
1
vote
1 answer

InvalidOperationException: The ViewData item that has the key 'GenderID' is of type 'System.Int32' but must be of type 'IEnumerable'

I've been searching for a solution for about a month, however, nobody is using the functions the same way my software (written by a previous programmer) is using the functions. I've tried every solution provided; without exception, an error always…
Kenneth Tillman
  • 31
  • 4
1
vote
1 answer

.Net 6 Unable to resolve service for type Microsoft.EntityFrameworkCore.DbSet

System.InvalidOperationException: Unable to resolve service for type 'Microsoft.EntityFrameworkCore.DbSet`1[Entities.Product]' while attempting to activate 'Drin.Data.Repositories.GenericRepository`1[Entities.Product]'. I getting this error while…
mach
  • 113
  • 1
  • 6
1
vote
0 answers

How to solve AggregateException error showing up by using opc ua compiler?

while using the Opc.Ua.ModelCompiler.exe I´ll get the following issue. [AggregateException] Error parsing file .\Demo\example_project.xml (Object reference not set to an instance of an object.) (There is an error in XML document (2,…
Yeap
  • 51
  • 4
1
vote
0 answers

InvalidOperationException Helixtoolkit SharpDX Element3DPresenter

I am using SharpDX to display a model from an .obj file. My application is structured like this MainViewModel (with MainView) |__ SomeViewModel (with SomeView) |__ SomeOtherViewModel (with SomeOtherView) |__SomeNestedViewModel (with…
tabina
  • 1,095
  • 1
  • 14
  • 37
1 2 3
…
33 34