How to filter datagridview from another Form

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Hello guys. So I am making projekt in Windows Forms and need a little Help. In my first Form I am import data from local sql database into datagridvdiew. Data is about Client Money Transfers. Now I need to make a Filter for my DGV, for example display all Client datas wich money transfers are more than 1500$. Such querys can be more than one So am I Calling another Form on buttonClick to enter all Filter parameters. After enterying parameters on ButtonClick I need to filter data in DGV which is in first Form. But I donn't know how to change DGV from another Form. I was trying to call form1 by this way:
Form form1 = new Form(); But I can not still reach DGV. Who can help me with this ?

Posted 20-Jan-16 3:01am

dave_bulac

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Alex M.H. 20-Jan-16 10:11am

You cannot directly access a class in the calling form from the outside easily, imagine what will go on in your "mainform"-class after you call your "inputform"-class - you never know. The "back-call" that you're planing to implement is not threadsafe.

I think there are three ways to solve the situation
1. scope to threading (slightly pushing it)
2. use events/messages (my favorit, not very difficult to understand)
3. do it in one form (hide/show input area, resize the form for your needs - the dirty way)

C# in a nutshell (o'reilly) may help with the details

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Scribling Doodle · Answer 1 · 2016-01-20T03:50:00

Create a checkbox with the following parameter:

C#

private void chkBox_CheckedChanged(object sender, EventArgs e)
        {
            
            MySqlDataAdapter sda = new MySqlDataAdapter();
            MySqlConnection Con = new MySqlConnection("server=localhost;user id=root; password = 12345; persistsecurityinfo=True;database=YOURDB");
            MySqlCommand Command = new MySqlCommand("SELECT COLUMN from TABLE WHERE COLUMN;", Con);
            DataTable dt = new DataTable();
            sda.SelectCommand = Command;
            sda.Fill(dt);
            DgvGerirEmp.DataSource = dt;
            if (chkBox.Checked == true)
            {
                MySqlCommand Command = new MySqlCommand("SELECT COLUMN from TABLE WHERE COLUMN <=1500;", Con);

            }
            else
            {
                MySqlCommand Command = new MySqlCommand("SELECT COLUMN from TABLE WHERE COLUMN >=1499;", Con);
                GerirEmpArq.Show();
                GerirEmpDesArq.Hide();
                
            }
            

        }

I didn't tested it but it should work fine, i've used it myself on some projects, use it as you wish.