Basic knowledge of C#winform programming __ Programming

1. Pass the value of the first form to the second form, and use the overloaded constructor of the second form Form2 form2=new form (STR1);

2. To return the value of the second subform that pops up to the parent form, you need to use attributes such as: Set properties in a subform: public string Str1{set{str1=value; Get{return STR1}}

3. The Code for the dialog window that pops up two buttons is MessageBox.Show ("content of the hint", "form name", Messageboxbuttons.cancelok);

4. The difference between a form's function show () and ShowDialog () is that when ShowDialog () pops up, the parent form is not movable, and show () can be moved by the parent form.

5.

Add this in the button event. DialogResult = System.Windows.Forms.DialogResult.OK, which causes the form to be released and closed.