c＃以某种形式调用类函数以从

Question

i have a problem and i need your help. i create 2 windows form and a class in my c# project and i have two dataGridView. one in form 1 and one form 2 with the same name but different content. i create a class and in that class which called Sqlfunctions i create a SqlConnection and 2 method which called Refresh1 and Refresh2. I can use each of those method in their respected from by this two line. in form1

Sqlfunctions.Refresh(this.dataGridView1);

in form 2

Sqlfunctions.Refresh2(this.dataGridView1);

but i need to call Sqlfunctions.Refresh(this.dataGridView1) in form 2 to update dataGridView1 in form 1. how can i call a class method in one form to update another form. or how can i call Sqlfunctions.Refresh(this.dataGridView1) in form 1 when form 2 was closed. tank you in advanced

here is more information

i open form 2 with a button in form 1 and i update a dateGridView in form 2. when that happen i want to update dateGridView in form 1 too. because the dategridview in form 2 and 1 are using same data base. i can update datagridview in form 1 by calling this class function. Sqlfunctions.Refresh(this.dataGridView1); but i dont know how to call this class function in form 2 to make change to datagridview in form 1. or even how can i run this method in form 1 when form 2 was closed.both way make datagridview in form 1 to update. please help me. im stuck.

i know how to call a method from form 1 when i am in form 2. but the problem is that my method isnt in fomr 1. its in a class called Sqlfunctions

Answer 1

i open form 2 with a button in form 1

Set Form1 as the Owner of Form2 when you open it, like this:

Form2 f2 = new Form2();
f2.Show(this);

Now over in Form2, you can cast the Owner() property to the Form1 type and use it:

// ... from within Form2 ...
Form1 f1 = (Form1)this.Owner;
Sqlfunctions.Refresh(f1.dataGridView1);

But you would need to select dataGridView1 in Form1 and change its Modifiers() property to Public for this to work.