VB.Net 2019 after latest update my project saved as .dll does not recognize any shared item

Question

VB.Net 2019 after latest update my project saved as .dll does not recognize any shared item

Simon 466

Simon 466 Reputation points

2022-01-27T14:56:59.113+00:00

My Main Form contains all the information, and when I want to update or use fields in the Main Form from other forms, I use a shared field instead of the actual field, However, after the most recent update to VS 2019 from Microsoft, it does not recognize any shared fields and any shared functions. How can other forms use fields from the Main Form?

Accepted answer

2 additional answers

Your answer

Simon 466 Reputation points

2022-01-27T14:56:59.113+00:00

My Main Form contains all the information, and when I want to update or use fields in the Main Form from other forms, I use a shared field instead of the actual field, However, after the most recent update to VS 2019 from Microsoft, it does not recognize any shared fields and any shared functions. How can other forms use fields from the Main Form?

Answer 1

The latest update shouldn't have broken language behavior. I suspect there might be something else going on or perhaps your code was never really correct to begin with. Please post the code that is failing along with any relevant information so we can help figure this out.

As for using fields from the main form it is generally not recommended that you use shared fields as that isn't a good UI design. However it really depends upon what you're trying to do so without more information it would be hard to provide good suggestions. At a high level, data needed by child forms should be set on properties exposed by the child form. The main form sets the properties before showing the child form. Look at the SelectedFilename property of OpenFileDialog for an example of how this might work.

If you need to share data across forms and that data is changing over time then the UI doesn't actually own the data and therefore shouldn't contain it. Move the data out of the form and have the forms update themselves based upon the data and listen for data change events. This is what the INotifyPropertyChanged interface is designed for but there are other approaches as well depending upon the type of app you're building.

Answer 2

Simon 466

I really appreciate your response with such clarity.
I wanted to ask you another thing, I have a Main Form that contains a child form
and from the child form I want to manage the main form to save the data and move it to the next record.
Is this possible to do?

Michael Taylor 60,331 Reputation points

2022-01-27T17:51:47.89+00:00
Parent to child communication should happen through properties if the child is shown modally. A common situation.

In parent

Private Sub ShowChild () Dim child As New ChildForm() child.DataNeededByChild = valueFromParent child.ShowDialog() Dim updatedData As SomeDataType = child.UpdatedDataForParent End Sub

If the child form is shown modelessly then you'll want to use a BindingNavigator that the parent passes to the child (not ideal), use a custom "selected object" class that both forms can reference or have the child form raise an event that the parent form listens to and updates accordingly.

Answer 3

Simon 466

i am working on vb.net not c
if you can explain in vb.net
thanks in advence

Michael Taylor 60,331 Reputation points

2022-01-27T19:28:36.113+00:00

Sorry, forgot to translate it. Updated original post.

Please use the comment feature to reply to answers instead of creating a new answer yourself each time. Otherwise we cannot track what answer your comment is applying to. Thanks.
Simon 466 Reputation points

2022-01-27T21:31:06.673+00:00

i am working on vb.net not c
if you can explain in vb.net
thanks in advence
Michael Taylor 60,331 Reputation points

2022-01-27T21:37:14.447+00:00

I already updated the code to VB.NET. What else do you need me to explain in that code example?
Simon 466 Reputation points

2022-01-27T21:39:57.42+00:00

i didnt see it

Share via

VB.Net 2019 after latest update my project saved as .dll does not recognize any shared item

2 additional answers

Your answer