Add dialogresult to the winform to return the result.

 

Example:

In Form A, click the button to bring up Form B.

When Form B is closed, determine whether it is OK or canceled]

Then the dialogresult return value can be added to Form B.

Then form a is used for judgment.

Entire ProcessCodeAs follows:

 

Form a pops up Form B and receives the return value code:

Dialogresult DR = f. showdialog ();
If(DR = dialogresult. OK)
{
//Some interesting code
}

 

Form B Cancel Code:

This. Dialogresult = dialogresult. Cancel;
This. Close ();

 

Form B [OK button] Code:

This. Dialogresult = dialogresult. OK;
This. Close ();