双击DataGridView行并在C＃中的另一个DataGridView中显示列

Question

So, I am trying to build a code where I could be able to after click F1 it will display in a new form a datagridview depending on the textbox . Then I want to double click in that row and display in the main datagridview what I selected into the new form datagridview . This is the code I got:

private void dataGridView1_RowHeaderMouseDoubleClick(object sender, DataGridViewCellMouseEventArgs e)
{
    DataGridViewRow dr = dataGridView1.SelectedRows[0];
    this.Hide();
    frmPrincipal frm = new frmPrincipal();

    try
    {
        con = new SqlConnection(cs.DBConnP);
        con.Open();

        cmd = new SqlCommand(@"SELECT RTRIM(CL.Cargs) AS 'Cargs', RTRIM(S.Abvs) AS 'Abvs',  RTRIM(CL.Linha) AS 'Linha', RTRIM(CL.Qty) AS 'Quantity'
                             FROM CargsCab CC (NOLOCK)
                             INNER JOIN CargsLin CL (NOLOCK) ON CC.Cargs = CL.Cargs
                             INNER JOIN Stock S (NOLOCK) ON CL.Code = S.Code
                             INNER JOIN Marks M (NOLOCK) ON S.Marks = M.Marks
                             WHERE CC.Date >= GETDATE() - 120 AND CL.State NOT IN ('F', 'A') AND S.TypeEmb = 'P' 
                             AND CC.Type = 'OCS' AND CL.Cargs LIKE '%" + dr.Cells[0].Value.ToString() + "%' ORDER BY CL.Cargs, S.Marks DESC, S.Abvs", con);
        SqlDataAdapter da = new SqlDataAdapter(cmd);
        DataSet ds = new DataSet();

        da.Fill(ds, "CargCab");
        da.Fill(ds, "CargLin");
        da.Fill(ds, "Stock");
        da.Fill(ds, "Mark");

        frm.dataGridView1.DataSource = ds.Tables["CargCab"].DefaultView;
        frm.dataGridView1.DataSource = ds.Tables["CargLin"].DefaultView;
        frm.dataGridView1.DataSource = ds.Tables["Stock"].DefaultView;
        frm.dataGridView1.DataSource = ds.Tables["Mark"].DefaultView;

        con.Close();
    }
    catch (Exception ex)
    {
        MessageBox.Show("Error\nDetalhes: " + ex.Message, "Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
    }
}

How could I solve it?

Answer 1

If I understood you well, you wanna get selected data from popup Form back to your main form. I prefer doing it in following way:

On main form when you are creating new Form, attach to it event handler

FormClosing

On that event call method that you need to add in your new form for example

var selectedData= MyForm.GetData();

This is available because form is still closing and not yet disposed.

Your method "GetData" has to collect selected data form datagridView of course. This was covered many times on stackoverflow so you will find this easily.

Corrected way:

  public partial class Form1 : Form
{

    private Form2 f2;
    private obj returnedData;

    public Form1()
    {
        InitializeComponent();


    }



    private void button1_Click(object sender, EventArgs e)
    {
         f2 = new Form2();
        f2.FormClosing += F_FormClosing;
        f2.Show();
    }

    private void F_FormClosing(object sender, FormClosingEventArgs e)
    {
        this.returnedData = f2.GetData();  //clicked data is returned to your main form, do what you want with it
    }
}

public partial class Form2 : Form
{
    private List<obj> list;
    private obj selectedData;

    public Form2()
    {
        InitializeComponent();
        data.CellDoubleClick += DataGridView1_CellDoubleClick;

        list = new List<obj>();
        data.AutoGenerateColumns = true;
        list.Add(new obj() { a = "abc1", b = "abc2" });
        list.Add(new obj() { a = "cda1", b = "cda2" });
        data.DataSource = list;



    }



    internal obj GetData()
    {
        return selectedData;
    }

    private void DataGridView1_CellDoubleClick(object sender, DataGridViewCellEventArgs e)
    {

        selectedData = list.ElementAt(e.RowIndex);

        this.Close();
    }

}

internal class obj
{
    [DisplayName("aaa")]
    public string a { get; set; }

    [DisplayName("bbb")]
    public string b { get; set; }
}