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.
Questions tagged [invalidoperationexception]
505 questions
4
votes
1 answer
SaveFileDialog throws System.InvalidOperationException: 'My File.xlsx' is not a valid file name
A customer just had this error with our application, which basically happens when calling ShowDialog on a Microsoft.Win32.SaveFileDialog. The complete stack trace is the following:
System.InvalidOperationException: 'My File.xlsx' is not a valid…
Carl
- 1,224
- 2
- 19
- 35
4
votes
1 answer
signalr InvalidOperationException
I recently started using Signal R library in ASP.Net MVC 3 application. I am able to use Signal R to send message to client. But I noticed that if I logged in to the application from another browser, I get following error -
Exception type:…
user2370912
- 41
- 1
- 2
4
votes
1 answer
DataGrid throws InvalidOperationException by Scrolling
I want to show in a DataGrid the contents of a file. (The file contains more than 200,000 lines)
To show the Grid with the Data is fast.
But when I use the Scrollbar (for down scrolling) I've got the following…
David
- 4,027
- 10
- 50
- 102
3
votes
3 answers
InvalidOperationException - When ending editing a cell & moving to another cell
I made a program in which I wanted to manually update the Data Grid View.
-I have a Method to Refresh the DGV by clearing it and then reinserting the data.
-Using the designer, I made an event handler for the DGV's CellEndEdit. Inside the Event…
random dude
3
votes
1 answer
I get an InvalidOperationException When Invoking a Service
The contract type HelloIndigo.Service is not attributed with
ServiceContractAttribute. In order to define a valid contract, the
specified type (either contract interface or service class) must be
attributed with…
BlackFire27
- 1,470
- 5
- 21
- 32
3
votes
3 answers
C# custom Iterator implementation - prevent collection modification during foreach loop
I created a custom collection that implements IEnumerable(T) and a custom IEnumerator(T).
I also added an Add() method to the custom collection which looks like this:
public void Add(T item)
{
T[] tempArray = new T[_array.Length + 1];
for…
Marko
- 311
- 3
- 10
3
votes
4 answers
Identify InvalidOperationException "Collection was modified; enumeration operation may not execute."
I've got a good old InvalidOperationException being thrown with the standard message
Collection was modified; enumeration operation may not execute.
The problem is, the enumerator isn't modifying itself, for example:
private TRoute…
Ian
- 33,605
- 26
- 118
- 198
3
votes
1 answer
c#: "System.InvalidOperationException: Queue empty" and other errors while using SendKey.SendWait()
I wrote a program to send 'Enter' key to a certain active window. I used a Timer to get the title of the active window for the moment and act accordingly. I made an error log file so i can keep track of all the errors. Here's the code that's…
user714014
- 31
- 1
- 3
3
votes
1 answer
Adding nodes to TreeView causes Thread-Exception
i have a little problem.
I´ve made a class that manages my prefabs (predefined objects for my level-editor).
On loading the prefabs at start, it creates TreeNodes for categories and each prefab and adds it to an TreeView that it knows by the…
SharpShade
- 1,761
- 2
- 32
- 45
3
votes
2 answers
How do I fix EmbeddedRessources in a ASP.NET web site?
I am trying to reference a js file in a class in an ASP.NET and I receive this error:
Assembly 'XXX' contains a Web resource with name 'XXX' but does not contain an embedded resource with name 'XXX'
Searching the web tell me I must have a Path…
jpsimard-nyx
- 8,587
- 6
- 32
- 48
3
votes
1 answer
Getting System.InvalidOperation exception while trying to execute command line script using C#
I am trying to execute a command to generate PDF file using phantomjs.
If I execute following command using command prompt, everything works fine.
C:\phantomjs-2.1.1\bin\phantomjs.exe C:\phantomjs-2.1.1\rasterize.js…
SharpCoder
- 18,279
- 43
- 153
- 249
3
votes
2 answers
Generating and passing complex content to the GUI thread in WPF/C#
I'm aware, and use, the xxx.Dispatcher.Invoke() method to get the background thread to manipulate GUI elements. I think I'm bumping up against something similar, but slightly different, where I want a long running background task to construct a tree…
Walt Stoneburner
- 2,562
- 4
- 24
- 37
3
votes
1 answer
InvalidOperationException on Application.Exit
Can someone tell me why the exitToolStripMenuItem_Click throws an InvalidOperationException. I know it happens due to plugin.Close() being called. However, I do not understand why. Closing the Form1 via the "X" button does not trigger the exception.…
Brian Boyd
- 263
- 1
- 3
- 11
3
votes
1 answer
glNamedBufferData fires GL_INVALID_OPERATION
I get an exception at the very begin of my sample, when I try to allocate geometry for the gound, here and here:
at this point
gl4.glNamedBufferData(vertexBuffer[0], Vertex.size() * vertices.size(),
floatBuffer,…
elect
- 6,765
- 10
- 53
- 119
3
votes
1 answer
SQLite and EntityFramework InvalidOperationException
I'm working with Visual Studio 2013 and trying to create sample project using SQLite and EntityFramework downloaded from NuGet.
When i run program i got this exception on the line below and i don't have any idea to repair…
Symeg
- 115
- 1
- 10