If I add data on form2 and I save it, how to update datagridview on form 1

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I make a database program where i can add new patients to an access table.
In form1 i click button "add patient".

form 2 opens with textboxes to fill in data.
the data saves correctly but i want to update the patient datagridview on form 1 when i close form2?

What I have tried:

I found a sub that handles me.closed but i can't add form1 to the code?

Private Sub FormMakeDossier_Closed(sender As Object, e As EventArgs) Handles Me.Closed

    End Sub

Posted 7-Nov-20 12:16pm

Izzy Decorte

Updated 7-Nov-20 20:22pm

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Gerry Schmitz · Answer 1 · 2020-11-07T14:47:00

Solution 1

Use a "static" Observable Collection (OC). The form adds to the collection; the grid gets updated automatically using the OC as its data source; and the events fired when the collection changes can be used to update the Access db.

Posted 7-Nov-20 14:47pm

Gerry Schmitz

OriginalGriff · Answer 2 · 2020-11-07T20:05:00

Handle the Closed event in Form1 by adding it to the Form2 instance you create just before you call Show on it.
When the Form2instance closes, the event will be raised, and you will have Form1 in Me as usual, and Form2 is passed to you as the sender parameter.
You can then use a property or method in Form2 to access the information Form1 needs:

The form that creates an instance of another:

C#

MyForm mf = new MyForm();
mf.Show();

Is the "parent", the other form is the "child".
(This doesn't imply any formal MDI relationship)

Transferring information between two forms, Part 2: Child to Parent[^] The code is in C#, but it's pretty simple and obvious.