Passing values between C # forms

Form1: Parent form,

Form2: Child form.

1. The parent form receives the return value of the subform:

     Public Partial class Form1:form    {        privatevoid Btnopen_click (object  sender, EventArgs e)        {             New  Frmcorpdtadd (dsservice);             if (FD. ShowDialog () = = DialogResult.Cancel)  // Open Subform, and after closing             {                = fd._ Retrowguid;    // receive the value of the subform here             }         }     }

     Public Partial classForm2:form { Public string_retrowguid;//define common global variables for easy access to other forms, record values returned to the parent form       Private voidBtnsave_click (Objectsender, EventArgs e) {_retrowguid= dgsg_aptitudeproject.currentrow.cells["RowGuid"]. Value.tostring ();//DataGridView The Rowguid value of the selected row to the global variable _retrowguid             This. DialogResult = DialogResult.Cancel;//Cancel (Close)        }     }

Post-processing modification ...

Passing values between C # forms